CN107199126A - A kind of floatation wastewater of phosphorite recycle device and its technique - Google Patents
A kind of floatation wastewater of phosphorite recycle device and its technique Download PDFInfo
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- CN107199126A CN107199126A CN201710263242.3A CN201710263242A CN107199126A CN 107199126 A CN107199126 A CN 107199126A CN 201710263242 A CN201710263242 A CN 201710263242A CN 107199126 A CN107199126 A CN 107199126A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 32
- 239000002367 phosphate rock Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 18
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 204
- 239000002253 acid Substances 0.000 claims abstract description 87
- 230000002000 scavenging effect Effects 0.000 claims abstract description 70
- 238000005188 flotation Methods 0.000 claims abstract description 48
- 238000003756 stirring Methods 0.000 claims abstract description 22
- 239000012141 concentrate Substances 0.000 claims abstract description 21
- 238000010408 sweeping Methods 0.000 claims abstract description 19
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 18
- 239000010452 phosphate Substances 0.000 claims abstract description 18
- 239000002002 slurry Substances 0.000 claims abstract description 17
- 230000008719 thickening Effects 0.000 claims abstract description 17
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 16
- 238000004537 pulping Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000011084 recovery Methods 0.000 claims abstract description 5
- 238000005516 engineering process Methods 0.000 claims abstract description 3
- 239000002699 waste material Substances 0.000 claims description 73
- 239000006260 foam Substances 0.000 claims description 63
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 32
- 230000001105 regulatory effect Effects 0.000 claims description 27
- 238000003860 storage Methods 0.000 claims description 21
- 230000002378 acidificating effect Effects 0.000 claims description 19
- 238000004064 recycling Methods 0.000 claims description 19
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 9
- 239000011574 phosphorus Substances 0.000 claims description 9
- 229910052698 phosphorus Inorganic materials 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 3
- 239000003337 fertilizer Substances 0.000 description 3
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- -1 phosphate compound Chemical class 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000004254 Ammonium phosphate Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/14—Flotation machines
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biotechnology (AREA)
- Physical Water Treatments (AREA)
Abstract
本发明公开了一种磷矿浮选废水回收利用装置及其工艺，包括调浆设备、球磨机、旋流器、搅拌设备、第一粗选槽、第二粗选槽、第一扫选槽、第二扫选槽、浓缩设备、精矿槽、尾矿槽、酸性水高位水池、溢流水高位水池；所述调浆设备的出浆口与球磨机输入口相连，所述球磨机的输出口与旋流器的矿浆输入口相连，所述旋流器的底流口与球磨机输入口相连，所述旋流器的溢流管出口与搅拌设备相连，所述搅拌设备与第一粗选槽的矿浆流入口相连。本发明能够有效解决磷矿浮选工艺中废水大量排放造成的环境污染等问题。
The invention discloses a phosphate ore flotation wastewater recovery and utilization device and its technology, including pulping equipment, a ball mill, a cyclone, a stirring device, a first roughing tank, a second roughing tank, a first sweeping tank, The second scavenging tank, thickening equipment, concentrate tank, tailings tank, acid water high-level pool, overflow water high-level pool; the slurry outlet of the slurry mixing equipment is connected with the input port of the ball mill, and the output port of the ball mill is connected with the rotary The slurry input port of the hydrocyclone is connected, the bottom flow port of the cyclone is connected with the input port of the ball mill, the overflow pipe outlet of the cyclone is connected with the stirring equipment, and the stirring equipment is connected with the pulp flow of the first roughing tank The entrance is connected. The invention can effectively solve the problems of environmental pollution and the like caused by the massive discharge of waste water in the phosphate rock flotation process.
Description
技术领域technical field
本发明属于磷矿浮选工艺技术领域，更具体地，涉及一种磷矿浮选废水回收利用装置及其工艺。The invention belongs to the technical field of phosphate rock flotation technology, and more specifically relates to a device for recycling phosphate rock flotation wastewater and a process thereof.
背景技术Background technique
磷矿是生产磷肥、磷化工产品的必不可少的基础原料。我国磷矿资源储量167.86亿吨，平均品位16.95％。磷化工中较常见的是磷矿浮选工艺，对磷矿进行正反浮选，粗选、扫选、精选，从而得到磷精矿，而磷矿浮选工艺会产生大量的废水，废水中含有大量的酸性物质，会对环境造成污染，随着磷化工在最近十几年的兴起，磷矿浮选工艺产生的废水问题不可忽视，为了贯彻落实国家安全法律法规，加强环境保护，满足安全生产要求，企业需要对磷矿浮选产生的废水进行处理。Phosphate rock is an essential basic raw material for the production of phosphate fertilizers and phosphorus chemical products. my country's phosphate rock reserves are 16.786 billion tons, with an average grade of 16.95%. Phosphate ore flotation process is more common in phosphorus chemical industry. Phosphate ore is subjected to positive and negative flotation, roughing, sweeping, and concentration to obtain phosphorous concentrate. Phosphate ore flotation process will produce a large amount of waste water, waste water It contains a large amount of acidic substances, which will pollute the environment. With the rise of phosphorus chemical industry in the past ten years, the problem of wastewater generated by phosphate rock flotation process cannot be ignored. In order to implement national security laws and regulations, strengthen environmental protection, and meet In order to meet the requirements of safe production, enterprises need to treat the wastewater generated from phosphate rock flotation.
发明内容Contents of the invention
针对现有技术中存在的问题，本发明的目的在于提供一种磷矿浮选废水回收利用装置及其工艺，以解决磷矿浮选工艺中废水大量排放造成的环境污染等问题。Aiming at the problems existing in the prior art, the object of the present invention is to provide a phosphate rock flotation wastewater recycling device and its process, so as to solve the problems of environmental pollution caused by the massive discharge of wastewater in the phosphate rock flotation process.
为实现上述目的，本发明的一种磷矿浮选废水回收利用装置，包括调浆设备、球磨机、旋流器、搅拌设备、第一粗选槽、第二粗选槽、第一扫选槽、第二扫选槽、浓缩设备、精矿槽、尾矿槽、酸性水高位水池、溢流水高位水池；所述调浆设备的出浆口与球磨机输入口相连，所述球磨机的输出口与旋流器的矿浆输入口相连，所述旋流器的底流口与球磨机输入口相连，所述旋流器的溢流管出口与搅拌设备相连，所述搅拌设备与第一粗选槽的矿浆流入口相连；所述第一粗选槽的泡沫排出口与第一扫选槽泡沫流入口相连，所述第一粗选槽的矿浆排出口与第二粗选槽的矿浆流入口相连，所述第一粗选槽的废酸水排出口与酸性水高位水池相连；所述第一扫选槽的泡沫排出口与尾矿槽相连，所述第一扫选槽的矿浆排出口与所述第一粗选槽的矿浆流入口相连；所述第二粗选槽的泡沫排出口与第二扫选槽的泡沫流入口相连，所述第二粗选槽的矿浆排出口与浓缩设备相连，第二粗选槽中的废酸水排出口与第一粗选槽相连；所述第二扫选槽的泡沫排出口与尾矿槽相连，所述第二扫选槽的矿浆排出口与第二粗选槽相连；所述浓缩设备的矿浆排出口与精矿槽相连，所述浓缩设备的溢流水与溢流水高位水池相连，所述溢流水高位水池与球磨机相连。In order to achieve the above object, a kind of phosphate ore flotation wastewater recycling device of the present invention comprises a pulping equipment, a ball mill, a cyclone, a stirring device, a first roughing tank, a second roughing tank, a first sweeping tank , the second scavenging tank, thickening equipment, concentrate tank, tailings tank, acidic water high-level pool, overflow water high-level pool; the slurry outlet of the slurry mixing equipment is connected with the input port of the ball mill, and the output port of the ball mill is connected with the ball mill. The slurry input port of the cyclone is connected, the bottom flow port of the cyclone is connected with the input port of the ball mill, the overflow pipe outlet of the cyclone is connected with the stirring equipment, and the stirring equipment is connected with the pulp of the first roughing tank The inflow port is connected; the foam discharge port of the first roughing tank is connected with the foam inflow port of the first sweeping tank, and the pulp discharge port of the first roughing tank is connected with the pulp inflow port of the second roughing tank, so The waste acid water outlet of the first roughing tank is connected with the acid water high level pool; the foam outlet of the first scavenging tank is connected with the tailings tank, and the pulp outlet of the first scavenging tank is connected with the The pulp inlet of the first roughing tank is connected; the foam outlet of the second roughing tank is connected with the foam inlet of the second sweeping tank, and the pulp outlet of the second roughing tank is connected with the thickening equipment, The waste acid water outlet in the second roughing tank is connected to the first roughing tank; the foam outlet of the second scavenging tank is connected to the tailings tank, and the pulp outlet of the second scavenging tank is connected to the first roughing tank. The two roughing tanks are connected; the pulp outlet of the thickening equipment is connected with the concentrate tank, the overflow water of the thickening equipment is connected with the overflow water high level pool, and the overflow water high level pool is connected with the ball mill.
本发明的一种磷矿浮选废水回收利用工艺，包括以下步骤：A kind of phosphate ore flotation wastewater recycling process of the present invention comprises the following steps:
步骤(1)：将磷矿原料于调浆设备中加清水进行调浆，再进入球磨机中进行磨矿，磨矿后的矿浆进入旋流器中进行分级，粗颗粒的矿浆由旋流器的底流口流出排入球磨机中，细颗粒的矿浆由旋流器的溢流管出口流出排入搅拌设备中；Step (1): Put the phosphate rock raw material in the pulping equipment and add water to the pulping equipment for pulping, and then enter the ball mill for grinding. The bottom outlet flows out into the ball mill, and the fine-grained slurry flows out from the outlet of the overflow pipe of the cyclone into the mixing equipment;
步骤(2)：向搅拌设备中加入硫酸调整矿浆的pH值，并将矿浆排入至第一粗选槽中；Step (2): adding sulfuric acid to the stirring equipment to adjust the pH value of the pulp, and discharging the pulp into the first roughing tank;
步骤(3)：向第一粗选槽中加入捕收剂，在室温下进行充气浮选粗选，得到泡沫产品、粗选矿浆及废酸水；泡沫产品由第一粗选槽的泡沫排出口排出进入第一扫选槽中；第一粗选槽槽内矿浆由底部的矿浆排出口排入至第二粗选槽进行再次浮选，第一粗选槽中的废酸水由废酸水排出口通过水泵排入酸性水高位水池中存储备用；Step (3): Add collector to the first roughing tank, carry out aerated flotation roughing at room temperature, obtain foam product, roughing ore pulp and waste acid water; foam product is discharged from the foam of the first roughing tank The outlet is discharged into the first scavenging tank; the pulp in the first roughing tank is discharged into the second roughing tank from the pulp outlet at the bottom for further flotation, and the waste acid water in the first roughing tank is discharged from the waste acid The water outlet is discharged into the acid water high level pool through the water pump for storage;
步骤(4)：所述酸性水高位水池通过调节三向调节阀的阀门将废酸水通过水泵输入至第一扫选槽中进行扫选，得到泡沫产品、扫选矿浆及废酸水；泡沫产品作为尾矿由第一扫选槽的泡沫排出口排出至尾矿槽中储存；扫选矿浆及废酸水由第一扫选槽的矿浆排出口排入至第一粗选槽中进行再次浮选；Step (4): The high level pool of acidic water adjusts the valve of the three-way regulating valve to input the waste acid water into the first scavenging tank through the water pump for scavenging to obtain foam products, scavenging ore pulp and waste acid water; The product is discharged as tailings from the foam discharge port of the first scavenging tank to the tailings tank for storage; the scavenging pulp and waste acid water are discharged into the first roughing tank from the pulp discharge port of the first scavenging tank for further processing. flotation;
步骤(5)：所述酸性水高位水池通过调节三向调节阀的阀门将废酸水通过水泵输入至第二粗选槽中进行再次浮选，得到泡沫产品、精选矿浆及废酸水；泡沫产品由第二粗选槽的泡沫排出口排出进入第二扫选槽中进行扫选；第二粗选槽槽内矿浆由底部的矿浆排出口排入至第浓缩设备中进行浓缩处理；第二粗选槽中的废酸水由废酸水排出口排入至第一粗选槽中；Step (5): In the acidic water high level pool, by adjusting the valve of the three-way regulating valve, the waste acid water is pumped into the second roughing tank for re-flotation to obtain foam products, selected pulp and waste acid water; The foam product is discharged from the foam outlet of the second roughing tank into the second sweeping tank for sweeping; the pulp in the second roughing tank is discharged into the first thickening equipment from the bottom pulp outlet for concentration treatment; The waste acid water in the second roughing tank is discharged into the first roughing tank from the waste acid water outlet;
步骤(6):所述酸性水高位水池通过调节三向调节阀的阀门将废酸水通过水泵输入至第二扫选槽中进行再次扫选，得到泡沫产品、精选矿浆及废酸水；泡沫产品作为尾矿由第二扫选槽的泡沫排出口排出至尾矿槽中储存；扫选矿浆及废酸水由第二扫选槽的矿浆排出口排入至第二粗选槽中进行再次浮选；Step (6): the acidic water high level pool is used to input the waste acid water through the water pump into the second scavenging tank by adjusting the valve of the three-way regulating valve to sweep again, to obtain foam products, selected pulp and waste acid water; The foam product is discharged as tailings from the foam outlet of the second scavenging tank to the tailings tank for storage; the scavenging pulp and waste acid water are discharged into the second roughing tank from the pulp outlet of the second scavenging tank for storage. Flotation again;
步骤(7):所述浓缩设备浓缩得到的矿浆即为磷精矿输入至精矿槽中储存，浓缩得到的废水即溢流水通过水泵输入至溢流水高位水池中存储，溢流水高位水池通过调节阀向球磨机中输送溢流水。Step (7): The ore pulp obtained by the concentration of the concentration equipment is the phosphorus concentrate input to the concentrate tank for storage, and the waste water obtained by concentration, namely the overflow water, is input to the overflow water high-level pool through the water pump for storage, and the overflow water high-level pool is adjusted The valve sends overflow water to the ball mill.
本发明的有益效果在于：本发明的磷矿浮选废水回收利用工艺可将工艺中产生的废酸水和溢流水进行回收循环利用，可使磷复肥公司废水达到“零排放”，大大减小了下游河流的污染压力和其自净能力的要求，利废减排，减少了区内排污总量，缓解了环保压力，具有良好的环保效益，适应国家环保型企业发展；同时利用工艺中产生的废酸水替代硫酸调整矿浆pH，可有效降低硫酸的使用，降低生产成本并降低环境污染，采用浓缩后产生的溢流水取代部分清水对磷矿进行调浆，可减少清水的使用量，节约水资源；本发明采用废水回收循环利用对磷矿进行浮选，其回收率仍可达到95％以上，得到磷精矿中P2O5的质量浓度含量达到30％以上、MgO的质量浓度含量控制在0.8％以下。The beneficial effect of the present invention is that: the phosphate rock flotation wastewater recycling process of the present invention can recycle the waste acid water and overflow water produced in the process, and can make the wastewater of the phosphate compound fertilizer company reach "zero discharge", greatly reducing Reduce the pollution pressure of downstream rivers and the requirements of its self-purification ability, use waste and reduce emissions, reduce the total amount of sewage in the area, ease the pressure on environmental protection, have good environmental protection benefits, and adapt to the development of national environmental protection enterprises; The waste acid water replaces sulfuric acid to adjust the pH of the slurry, which can effectively reduce the use of sulfuric acid, reduce production costs and reduce environmental pollution. The overflow water generated after concentration is used to replace part of the clean water to adjust the slurry of phosphate rock, which can reduce the use of clean water and save Water resources; the present invention uses waste water recovery and recycling to carry out flotation on phosphate rock, and its recovery rate can still reach more than 95%, and the mass concentration content of P2O5 in the phosphorus concentrate can reach more than 30 %, and the mass concentration content of MgO Control it below 0.8%.
附图说明Description of drawings
以下结合附图和具体实施方式对本发明作进一步的解释说明。The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.
图1是本发明的磷矿浮选废水回收利用装置结构示意图；Fig. 1 is the structure schematic diagram of the phosphate ore flotation wastewater recycling device of the present invention;
其中，调浆设备1、球磨机2、旋流器3、搅拌设备4、第一粗选槽5、第二粗选槽6、第一扫选槽7、第二扫选槽8、浓缩设备9、精矿槽10、尾矿槽11、酸性水高位水池12、溢流水高位水池13，三向调节阀14，调节阀15，水泵16。Among them, pulping equipment 1, ball mill 2, cyclone 3, stirring equipment 4, first roughing tank 5, second roughing tank 6, first scavenging tank 7, second scavenging tank 8, thickening equipment 9 , concentrate tank 10, tailings tank 11, acid water high level pool 12, overflow water high level pool 13, three-way regulating valve 14, regulating valve 15, water pump 16.
具体实施方式detailed description
下面结合附图及具体实施例对本发明进行详细描述，本部分的描述仅是示范性和解释性，不应对本发明的保护范围有任何的限制作用。The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present invention.
如图1所示，本发明的一种磷矿浮选废水回收利用装置包括包括调浆设备1、球磨机2、旋流器3、搅拌设备4、第一粗选槽5、第二粗选槽6、第一扫选槽7、第二扫选槽8、浓缩设备9、精矿槽10、尾矿槽11、酸性水高位水池12、溢流水高位水池13；所述调浆设备1的出浆口与球磨机2输入口相连，所述球磨机2的输出口与旋流器3的矿浆输入口相连，所述旋流器3的底流口与球磨机2输入口相连，所述旋流器3的溢流管出口与搅拌设备4相连，所述搅拌设备4与第一粗选槽5的矿浆流入口相连；所述第一粗选槽5的泡沫排出口与第一扫选槽7泡沫流入口相连，所述第一粗选槽5的矿浆排出口与第二粗选槽5的矿浆流入口相连，所述第一粗选槽5的废酸水排出口与酸性水高位水池12相连；所述第一扫选槽7的泡沫排出口与尾矿槽11相连，所述第一扫选槽7的矿浆排出口与所述第一粗选槽5的矿浆流入口相连；所述第二粗选槽6的泡沫排出口与第二扫选槽8的泡沫流入口相连，所述第二粗选槽6的矿浆排出口与浓缩设备9相连，第二粗选槽6中的废酸水排出口与第一粗选槽5相连；所述第二扫选槽8的泡沫排出口与尾矿槽11相连，所述第二扫选槽8的矿浆排出口与第二粗选槽6相连；所述浓缩设备9的矿浆排出口与精矿槽10相连，所述浓缩设备9的溢流水与溢流水高位水池13相连，所述溢流水高位水池13与球磨机2相连。As shown in Fig. 1, a kind of phosphate ore flotation waste water recycling device of the present invention comprises and comprises mixing equipment 1, ball mill 2, cyclone 3, stirring equipment 4, the first roughing tank 5, the second roughing tank 6. The first scavenging tank 7, the second scavenging tank 8, the concentration equipment 9, the concentrate tank 10, the tailings tank 11, the acid water high level pool 12, the overflow water high level pool 13; The pulp port is connected to the input port of the ball mill 2, the output port of the ball mill 2 is connected to the pulp input port of the cyclone 3, the bottom flow port of the cyclone 3 is connected to the input port of the ball mill 2, and the The outlet of the overflow pipe is connected to the stirring device 4, and the stirring device 4 is connected to the pulp inlet of the first roughing tank 5; the foam outlet of the first roughing tank 5 is connected to the foam inlet of the first scavenging tank 7 Connected, the pulp discharge port of the first roughing tank 5 is connected with the pulp inflow port of the second roughing tank 5, and the waste acid water discharge port of the first roughing tank 5 is connected with the acid water high level pool 12; The foam outlet of the first scavenging tank 7 is connected to the tailings tank 11, and the pulp outlet of the first scavenging tank 7 is connected to the pulp inflow port of the first roughing tank 5; The foam discharge port of the selection tank 6 is connected with the foam inflow port of the second scavenging tank 8, the ore pulp discharge port of the second rough selection tank 6 is connected with the thickening equipment 9, and the waste acid water in the second rough selection tank 6 is discharged The outlet is connected to the first roughing tank 5; the foam outlet of the second scavenging tank 8 is connected to the tailings tank 11, and the pulp outlet of the second scavenging tank 8 is connected to the second roughing tank 6; The pulp outlet of the thickening device 9 is connected to the concentrate tank 10 , the overflow water of the thickening device 9 is connected to the overflow water high level pool 13 , and the overflow water high level pool 13 is connected to the ball mill 2 .
进一步地，所述酸性高位水池12通过三向调节阀14分别与第二粗选槽6、第一扫选槽7、第二扫选槽8相连。Further, the acid high-level pool 12 is connected to the second roughing tank 6 , the first cleaning tank 7 and the second cleaning tank 8 through a three-way regulating valve 14 .
进一步地，所述溢流水高位水池13与球磨机2之间设有调节阀15；所述第一扫选槽7和第一粗选槽5之间设有调节阀15；所述第二扫选槽8和第二粗选槽6之间设有调节阀15。Further, a regulating valve 15 is provided between the overflow water high level pool 13 and the ball mill 2; a regulating valve 15 is provided between the first sweeping tank 7 and the first roughing tank 5; the second sweeping tank A regulating valve 15 is provided between the tank 8 and the second roughing tank 6 .
进一步地，所述第一粗选槽5的废酸水排出口与酸性水高位水池12之间设有水泵16；所述酸性水高位水池12与三向调节阀14之间设有水泵16，所述浓缩设备9与溢流水高位水池13之间设有水泵16。Further, a water pump 16 is provided between the waste acid water outlet of the first roughing tank 5 and the acidic water high-level pool 12; a water pump 16 is provided between the acidic water high-level pool 12 and the three-way regulating valve 14, A water pump 16 is provided between the concentration equipment 9 and the overflow water high-level pool 13 .
一种采用上述所述磷矿浮选废水回收利用装置的磷矿浮选废水回收利用工艺，包括以下步骤：A phosphate rock flotation wastewater recycling process using the above-mentioned phosphate rock flotation wastewater recycling device, comprising the following steps:
步骤(1)：将磷矿原料于调浆设备11中加清水进行调浆，再进入球磨机2中进行磨矿，磨矿后的矿浆进入旋流器3中进行分级，粗颗粒的矿浆由旋流器3的底流口流出排入球磨机2中，细颗粒的矿浆由旋流器3的溢流管出口流出排入搅拌设备4中；Step (1): Put the raw material of phosphate rock in the pulping equipment 11 and add clear water for pulping, and then enter the ball mill 2 for grinding, and the pulp after grinding enters the cyclone 3 for classification, and the coarse particle pulp is passed through the cyclone The bottom outlet of the swirler 3 flows out into the ball mill 2, and the fine-grained ore slurry flows out from the outlet of the overflow pipe of the cyclone 3 and is discharged into the stirring device 4;
步骤(2)：向搅拌设备4中加入硫酸调整矿浆的pH值，并将矿浆排入至第一粗选槽5中；Step (2): adding sulfuric acid to the stirring device 4 to adjust the pH value of the pulp, and discharging the pulp into the first roughing tank 5;
步骤(3)：向第一粗选槽5中加入捕收剂，在室温下进行充气浮选粗选，得到泡沫产品、粗选矿浆及废酸水；泡沫产品由第一粗选槽5的泡沫排出口排出进入第一扫选槽7中；第一粗选槽5槽内矿浆由底部的矿浆排出口排入至第二粗选槽6进行再次浮选，第一粗选槽5中的废酸水由废酸水排出口通过水泵16排入酸性水高位水池12中存储备用；Step (3): Add collector in the first roughing tank 5, carry out aerated flotation roughing at room temperature, obtain foam product, roughing ore pulp and waste acid water; The foam discharge port is discharged into the first scavenging tank 7; the pulp in the first roughing tank 5 is discharged into the second roughing tank 6 from the pulp outlet at the bottom to carry out flotation again, and the pulp in the first roughing tank 5 The waste acid water is discharged into the acid water high-level pool 12 through the water pump 16 from the waste acid water outlet for storage;
步骤(4)：所述酸性水高位水池12通过调节三向调节阀14的阀门将废酸水通过水泵16输入至第一扫选槽7中进行扫选，得到泡沫产品、扫选矿浆及废酸水；泡沫产品作为尾矿由第一扫选槽7的泡沫排出口排出至尾矿槽11中储存；扫选矿浆及废酸水由第一扫选槽7的矿浆排出口返回至第一粗选槽5中进行再次浮选；Step (4): The acidic water high-level pool 12 is used to input the waste acid water into the first scavenging tank 7 through the water pump 16 by adjusting the valve of the three-way regulating valve 14 for scavenging to obtain foam products, scavenging pulp and waste Sour water; the foam product is discharged as tailings from the foam outlet of the first scavenging tank 7 to the tailings tank 11 for storage; the scavenging pulp and waste acid water are returned to the first scavenging tank 7 through the pulp outlet Carry out flotation again in roughing tank 5;
步骤(5)：所述酸性水高位水池14通过调节三向调节阀14的阀门将废酸水通过水泵16输入至第二粗选槽6中进行再次浮选，得到泡沫产品、精选矿浆及废酸水；泡沫产品由第二粗选槽6的泡沫排出口排出进入第二扫选槽8中进行扫选；第二粗选槽6槽内矿浆由底部的矿浆排出口排入至第浓缩设备9中进行浓缩处理；第二粗选槽6中的废酸水由废酸水排出口排入至第一粗选槽5中；Step (5): The sour water high-level pool 14 is used to input the waste acid water through the water pump 16 into the second roughing tank 6 by adjusting the valve of the three-way regulating valve 14 to carry out flotation again to obtain foam products, selected ore pulp and Spent acid water; the foam product is discharged from the foam outlet of the second roughing tank 6 into the second scavenging tank 8 for sweeping; the pulp in the second roughing tank 6 is discharged into the second thickening tank 6 through the pulp outlet at the bottom Concentration treatment is carried out in the equipment 9; the waste acid water in the second roughing tank 6 is discharged into the first roughing tank 5 from the waste acid water outlet;
步骤(6):所述酸性水高位水池12通过调节三向调节阀14的阀门将废酸水通过水泵16输入至第二扫选槽8中进行再次扫选，得到泡沫产品、精选矿浆及废酸水；泡沫产品作为尾矿由第二扫选槽8的泡沫排出口排出至尾矿槽11中储存，扫选矿浆及废酸水由第二扫选槽8的矿浆排出口返回至第二粗选槽6中进行再次浮选；Step (6): The sour water high-level pool 12 is used to input waste acid water into the second scavenging tank 8 through the water pump 16 by adjusting the valve of the three-way regulating valve 14 to carry out scavenging again to obtain foam products, selected ore pulp and Waste acid water; foam products are discharged as tailings from the foam outlet of the second scavenging tank 8 to the tailings tank 11 for storage, and the scavenging pulp and waste acid water are returned to the second scavenging tank 8 by the pulp outlet of the second scavenging tank 8 Carry out flotation again in the two roughing tanks 6;
步骤(7):所述浓缩设备9浓缩得到的矿浆即为磷精矿输入至精矿槽10中储存，浓缩得到的废水即溢流水通过水泵16输入至溢流水高位水池13中存储，溢流水高位水池13通过调节阀15向球磨机2中输送溢流水。Step (7): The ore slurry obtained by the concentration of the concentration equipment 9 is the phosphorus concentrate input to the concentrate tank 10 for storage, and the waste water obtained by concentration, namely the overflow water, is input to the overflow water high level pool 13 for storage by the water pump 16, and the overflow water The high-level pool 13 sends overflow water to the ball mill 2 through the regulating valve 15 .
进一步地，所述步骤(2)中，通过调节阀15将所述酸性水高位水池12中的废酸水通过水泵16输入至搅拌设备4中用以调整矿浆的pH。Further, in the step (2), the waste acid water in the acid water elevated pool 12 is input to the stirring device 4 through the water pump 16 through the regulating valve 15 to adjust the pH of the pulp.
进一步地，按重量比计，所述清水、溢流水、酸性水的总用量之比为9:332:165。Further, in terms of weight ratio, the ratio of the total amount of clear water, overflow water, and acidic water is 9:332:165.
实施例1Example 1
取磷的质量含量为24.0％、镁的质量含量为5.5％的低品位胶磷矿原料于调浆设备1中，以9m3/h的流量加清水调浆成质量浓度为30％的原矿浆1t，将原矿浆通过配球比例为∮110mm的球磨机2进行磨矿，将原矿浆的细度按重量计算满足-200目粒级的质量浓度维持在70～80％；将磨细后的矿浆输送至旋流器3中进行分级，粗颗粒的矿浆(即不合格矿浆)由旋流器3的底流口流出排入球磨机2中进行再次磨矿，细颗粒的矿浆(即合格矿浆)由旋流器3的溢流管出口流出排入搅拌设备4中；向搅拌设备4中加入硫酸调整矿浆的pH值至4～6，并将矿浆排入至第一粗选槽5中，向其中加入捕收剂，捕收剂为由总脂肪碱、表面活性剂、不皂化物、溶解性助剂和水组成，在室温下进行充气浮选粗选，得到泡沫产品、粗选矿浆及废酸水，泡沫产品由第一粗选槽5的泡沫排出口排出进入第一扫选槽7中；第一粗选槽5槽内矿浆由底部的矿浆排出口排入至第二粗选槽6进行再次浮选，第一粗选槽5中的废酸水由废酸水排出口通过水泵16排入酸性水高位水池12中存储备用；酸性水高位水池12通过调节三向调节阀14的阀门将废酸水以14m3/h的流量通过水泵16输入至第一扫选槽7中进行扫选，得到泡沫产品、扫选矿浆及废酸水，泡沫产品作为尾矿由第一扫选槽7的泡沫排出口排出至尾矿槽11中储存，扫选矿浆及废酸水由第一扫选槽7的矿浆排出口排入至第一粗选槽5中与槽中矿浆混合进行再次浮选，第一扫选槽7可通过调节阀15将废酸水以40m3/h的流量返回至第一粗选槽5；通过调节三向调节阀14的阀门将酸性水高位水池12中的废酸水以41m3/h的流量通过水泵16输入至第二粗选槽6中进行再次浮选，得到泡沫产品、精选矿浆及废酸水，泡沫产品由第二粗选槽6的泡沫排出口排出进入第二扫选槽8中进行扫选，第二粗选槽6槽内矿浆由底部的矿浆排出口排入至浓缩设备9中进行浓缩处理，第二粗选槽6中的废酸水由废酸水排出口排入至第一粗选槽5中；通过调节三向调节阀14的阀门将酸性水高位水池12中的废酸水以10.7m3/h的流量通过水泵16输入至第二扫选槽8中进行再次扫选，得到泡沫产品、精选矿浆及废酸水，泡沫产品作为尾矿由第二扫选槽8的泡沫排出口排出至尾矿槽11中储存，扫选矿浆及废酸水由第二扫选槽8的矿浆排出口排入返回至第二粗选槽6中进行再次浮选；浓缩设备9浓缩得到的矿浆即为磷精矿输入至精矿槽10中储存，浓缩得到的废水即溢流水通过水泵16输入至溢流水高位水池13中存储，溢流水高位水池13通过调节阀15以59m3/h的流量向球磨机2中输送溢流水进行循环利用，溢流水与清水混合进行调浆，以节约清水的使用量，通过调节阀15将酸性水高位水池12中的废酸水通过水泵16输入至搅拌设备4中用以调整矿浆的pH，对废酸水进行循环利用，可以降低硫酸的使用量。本实施例磷矿浮选工艺中将废酸水和溢流水进行回收循环利用，得到磷精矿中P2O5的质量浓度含量达到30％以上、MgO的质量浓度含量控制在0.8％以下，磷精矿的回收率达到95％以上。Take low-grade collophosphine raw materials with a mass content of 24.0% of phosphorus and 5.5% of magnesium in the pulping equipment 1, and add clear water at a flow rate of 9m 3 /h to prepare raw ore pulp with a mass concentration of 30%. 1t, the raw ore pulp is ground through a ball mill 2 with a ball ratio of ∮110mm, and the fineness of the raw ore pulp is calculated by weight to meet the mass concentration of -200 mesh particle size at 70-80%; the finely ground pulp It is transported to the cyclone 3 for classification, and the coarse-grained pulp (that is, the unqualified pulp) flows out from the bottom outlet of the cyclone 3 and is discharged into the ball mill 2 for re-grinding, and the fine-grained pulp (that is, the qualified pulp) is passed through the cyclone. The outlet of the overflow pipe of the flow device 3 flows out into the stirring device 4; add sulfuric acid to the stirring device 4 to adjust the pH value of the pulp to 4-6, and discharge the pulp into the first roughing tank 5, and add Collector, the collector is composed of total fatty base, surfactant, unsaponifiable matter, solubility aid and water, and is subjected to aerated flotation roughing at room temperature to obtain foam products, roughing pulp and waste acid water , the foam product is discharged from the foam outlet of the first roughing tank 5 into the first sweeping tank 7; the pulp in the first roughing tank 5 is discharged into the second roughing tank 6 from the pulp outlet at the bottom for further cleaning Flotation, the waste acid water in the first roughing tank 5 is discharged into the acid water high level pool 12 through the water pump 16 from the waste acid water discharge port for storage; The acid water is input into the first scavenging tank 7 through the water pump 16 at a flow rate of 14m 3 /h for scavenging to obtain foam products, scavenging pulp and waste acid water, and the foam products are sent from the first scavenging tank 7 as tailings The foam discharge port is discharged to the tailings tank 11 for storage, and the scavenging pulp and waste acid water are discharged from the pulp discharge port of the first scavenging tank 7 into the first roughing tank 5 and mixed with the pulp in the tank for further flotation. The first scavenging tank 7 can return the waste acid water to the first roughing tank 5 with a flow rate of 40m 3 /h through the regulating valve 15; The water is input into the second roughing tank 6 through the water pump 16 at a flow rate of 41m 3 /h for further flotation to obtain foam products, selected ore pulp and waste acid water, and the foam products are discharged from the foam outlet of the second roughing tank 6 It is discharged into the second scavenging tank 8 for scavenging, and the pulp in the second roughing tank 6 is discharged into the concentration equipment 9 from the bottom pulp outlet for concentration treatment. The waste acid water in the second roughing tank 6 The waste acid water is discharged into the first roughing tank 5 from the outlet of the waste acid water; the waste acid water in the acid water high level pool 12 is input to the Sweep again in the second scavenging tank 8 to obtain foam products, selected ore pulp and waste acid water. The foam products are discharged as tailings from the foam outlet of the second scavenging tank 8 to the tailings tank 11 for storage. The beneficiation pulp and waste acid water are discharged from the pulp outlet of the second scavenging tank 8 and returned to the second roughing tank 6 for further flotation; the pulp obtained by concentrating in the thickening device 9 is phosphorus concentrate and input to the concentrate tank Store in 10, concentrated The waste water obtained by shrinking, i.e. overflow water, is input into the overflow water high-level pool 13 through the water pump 16 for storage, and the overflow water high-level pool 13 sends the overflow water to the ball mill 2 through the regulating valve 15 with a flow rate of 59m 3 /h for recycling, and the overflow water and Clean water is mixed for pulping to save the consumption of clean water. The waste acid water in the acid water high level pool 12 is input to the stirring device 4 through the water pump 16 through the regulating valve 15 to adjust the pH of the pulp and circulate the waste acid water Utilization, can reduce the consumption of sulfuric acid. In the phosphate rock flotation process of this embodiment, waste acid water and overflow water are recycled and reused, and the mass concentration of P2O5 in the phosphorous concentrate reaches more than 30 %, and the mass concentration of MgO is controlled below 0.8%. The recovery rate of phosphorous concentrate is over 95%.
本发明的磷矿浮选废水回收利用工艺将废酸水和溢流水进行回收循环利用产生的经济效益分析如下(以实施例1为例)：Phosphate ore flotation wastewater recycling process of the present invention carries out the economic benefit analysis that waste acid water and overflow water are reclaimed and recycled as follows (taking embodiment 1 as an example):
1、原料使用总量：1. The total amount of raw materials used:
废酸水：164.7m3/h(硫酸、磷酸、磷铵等)Waste acid water: 164.7m 3 /h (sulfuric acid, phosphoric acid, ammonium phosphate, etc.)
溢流水：332m3/h(磷精矿浓缩水)Overflow water: 332m 3 /h (phosphate concentrate concentrated water)
清水：9m3/hClear water: 9m 3 /h
总用水量：505.7m3/h。Total water consumption: 505.7m 3 /h.
2、溢流水、废酸水的循环利用经济效益：2. Economic benefits of recycling overflow water and waste acid water:
设计1吨矿的水耗2.67m3/t，由于溢流水、酸性水的利用，1吨矿清水0.05m3/h，少耗清水2.62m3/h，少耗清水量有溢流水、酸性水取代，经济效益如下：The water consumption of 1 ton of ore is designed to be 2.67m 3 /t. Due to the use of overflow water and acidic water, the clean water of 1 ton of mine is 0.05m 3 /h, and the clean water consumption is 2.62m 3 /h less. Water is replaced, and the economic benefits are as follows:
1吨矿清水2.67m3，1m3清水1.5元；1 ton of mine water 2.67m 3 , 1m 3 of clean water 1.5 yuan;
2.62m3清水有溢流水、废酸水取代；2.62m 3 clean water is replaced by overflow water and waste acid water;
1.5×2.62＝3.93元；1.5×2.62=3.93 yuan;
1吨溢流水、废酸水费用0.54元；The cost of 1 ton of overflow water and waste acid water is 0.54 yuan;
2.62m3费用：0.54×2.62＝1.41元；2.62m 3 cost: 0.54×2.62＝1.41 yuan;
1吨矿节约费用3.93－1.41＝2.52元；1 ton of ore saves cost 3.93－1.41＝2.52 yuan;
150万吨选矿节约水量费用约为378万元。1.5 million tons of ore dressing saves water cost of about 3.78 million yuan.
3、溢流水、废酸水利用药剂、硫酸的节约效益：3. Saving benefits of overflow water and waste acid water using chemicals and sulfuric acid:
硫酸：设计1吨矿耗硫酸24.5kg，两水利用后也能调节PH值，硫酸耗量16kg/t；Sulfuric acid: designed to consume 24.5kg of sulfuric acid for 1 ton of mine, the pH value can also be adjusted after the two waters are used, and the sulfuric acid consumption is 16kg/t;
1吨矿少耗硫酸：24.5-16＝8.5kg；1 ton of ore consumes less sulfuric acid: 24.5-16 = 8.5kg;
1kg硫酸0.4元；0.4 yuan for 1kg of sulfuric acid;
1吨矿节约硫酸费用0.4×8.5＝3.4元；1 ton of ore saves sulfuric acid cost 0.4×8.5=3.4 yuan;
150万吨选矿节约硫酸费用：510万元。1.5 million tons of ore dressing saves sulfuric acid cost: 5.1 million yuan.
捕收剂：设计1吨矿耗捕收剂1.9kg，两水含有药剂，利用后捕收剂耗量1.2kg/t；Collector: 1.9kg collector is designed for 1 ton of ore consumption, dihydrate contains chemicals, and the collector consumption after utilization is 1.2kg/t;
1吨矿少耗捕收剂：1.9-1.2＝0.7kg；1 ton of ore less consumption collector: 1.9-1.2 = 0.7kg;
1kg捕收剂5.50元；1kg collector 5.50 yuan;
1吨矿节约捕收剂费用5.5×0.7＝3.85元；1 ton of mine saves collector cost 5.5×0.7=3.85 yuan;
150万吨选矿节约捕收剂费用577.5万元。1.5 million tons of mineral processing saved collector costs of 5.775 million yuan.
由此看出，本发明的工艺基本可使磷复肥公司废水达到“零排放”，大大减小了下游河流的污染压力和其自净能力的要求，利废减排，减少了区内排污总量，缓解了环保压力，具有良好的环保效益。It can be seen from this that the process of the present invention can basically make the waste water of the phosphate compound fertilizer company reach "zero discharge", greatly reduce the pollution pressure of the downstream river and the requirements of its self-purification ability, make use of waste and reduce emissions, and reduce the total amount of sewage discharge in the area. Quantity, ease the pressure of environmental protection, has good environmental benefits.
以上所述仅是本发明的较佳实施例而已，并非对本发明的技术范围作出任何限制，故凡是依据本发明的技术实质对以上实施例所作的任何细微修改、等同变化与修饰，均仍属于本发明的技术方案范围内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the technical scope of the present invention, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to Within the scope of the technical solutions of the present invention.
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