CN105233975A - Tailing treatment process in poor magnetic iron ore beneficiation process - Google Patents
Tailing treatment process in poor magnetic iron ore beneficiation process Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 49
- 230000008569 process Effects 0.000 title claims abstract description 43
- 238000005456 ore beneficiation Methods 0.000 title claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title description 16
- 229910052742 iron Inorganic materials 0.000 title description 8
- 239000002562 thickening agent Substances 0.000 claims abstract description 31
- 239000000047 product Substances 0.000 claims abstract description 30
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000006148 magnetic separator Substances 0.000 claims abstract description 17
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000003860 storage Methods 0.000 claims abstract description 11
- 238000000227 grinding Methods 0.000 claims abstract description 9
- 230000008719 thickening Effects 0.000 claims abstract description 9
- 239000012065 filter cake Substances 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 12
- 230000018044 dehydration Effects 0.000 claims description 9
- 238000006297 dehydration reaction Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000012141 concentrate Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000007885 magnetic separation Methods 0.000 claims description 5
- 239000000706 filtrate Substances 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 2
- 208000028659 discharge Diseases 0.000 abstract description 18
- 238000012216 screening Methods 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 239000010878 waste rock Substances 0.000 description 1
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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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
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Abstract
本发明涉及一种贫磁铁矿石选矿过程尾矿处理工艺，包括将贫磁铁矿石给入高压辊磨机和筛分机闭路磨矿作业，筛分机的筛下产品给入粗选磁选机，其精矿给入后续作业，其特征在于还包括下列步骤：粗选磁选机的尾矿给入浓缩旋流器，浓缩旋流器的底流产品给入尾矿脱水筛；浓缩旋流器的溢流产品、脱水筛的筛下产品以及后续选别作业的尾矿一并给入尾矿浓缩机进行浓缩作业，尾矿浓缩机的底流产品给入尾矿压滤机进行过滤，脱水筛的筛上产品和尾矿压滤机滤饼一并给入尾矿干排皮带运输机运往尾矿堆场或尾矿库贮存。其优点是优先将选别过程近一半的粗粒级尾矿进行干排处理，其余尾矿经过浓缩和过滤后一起实现尾矿干排，全面优化了贫磁铁矿选矿过程尾矿处理工艺。
The invention relates to a process for treating tailings in the beneficiation process of lean magnetite ore, which includes feeding lean magnetite ore into a high-pressure roller mill and a screening machine for closed-circuit grinding operations, and feeding the under-screen product of the screening machine into a rougher magnetic separator, and the finer The follow-up operation of ore feeding is characterized in that it also includes the following steps: the tailings of the roughing magnetic separator are fed into the thickening cyclone, and the bottom flow product of the thickening cyclone is fed into the tailings dewatering screen; the overflow of the thickening cyclone The product, the under-screen product of the dewatering screen and the tailings of the subsequent sorting operation are sent to the tailings thickener for concentration operation, the underflow product of the tailings thickener is sent to the tailings filter press for filtration, and the sieve of the dewatering screen The product and the filter cake of the tailings filter press are sent to the tailings dry discharge belt conveyor and transported to the tailings yard or tailings storage. Its advantage is that nearly half of the coarse-grained tailings in the sorting process are given priority to dry discharge treatment, and the rest of the tailings are concentrated and filtered to realize tailings dry discharge together, which fully optimizes the tailings treatment process of the lean magnetite beneficiation process.
Description
技术领域 technical field
本发明属于铁矿选矿技术领域，特别是一种贫磁铁矿石选矿过程尾矿处理工艺。 The invention belongs to the technical field of iron ore beneficiation, in particular to a process for treating tailings in the beneficiation process of lean magnetite ore .
背景技术 Background technique
目前国内大部分金属矿山尾矿采用水力输送的方式送至尾矿库以传统方式贮存，不仅对环境造成严重的破坏，增加了安全隐患，而且大量占用土地，增加矿山投资和尾矿库的运营成本，成为制约矿山可持续发展的关键问题。特别是铁矿山尾矿的排放，由于排放量大造成尾矿库使用寿命缩短，而且还存在溃坝的危险。面对尾矿排放的诸多弊端，近年来尾矿的高浓度堆存做为一种新的尾矿处理技术不断得到发展，实现了节水的目的，减少了对坝体的威胁和环境扬尘，避免了对周边土壤和地下水资源的污染，增加了库区使用年限，解决了北方干旱地区严重缺水的生产难题。 At present, most metal mine tailings in China are sent to tailings ponds by hydraulic transportation and stored in the traditional way, which not only causes serious damage to the environment, increases safety hazards, but also occupies a large amount of land, increasing mine investment and tailings pond operations. Cost has become a key issue restricting the sustainable development of mines. Especially the discharge of iron mine tailings, due to the large discharge, the service life of the tailings pond is shortened, and there is also the danger of dam collapse. In the face of many disadvantages of tailings discharge, high-concentration stockpiling of tailings has been continuously developed as a new tailings treatment technology in recent years, which has achieved the purpose of water saving, reduced the threat to the dam body and environmental dust, It avoids the pollution of surrounding soil and groundwater resources, increases the service life of the reservoir area, and solves the production problem of severe water shortage in the northern arid area.
尾矿的高浓度堆存方式主要有高浓缩输送、膏体排放和尾矿干排等方式。 The high-concentration storage methods of tailings mainly include high-concentration transportation, paste discharge and tailings dry discharge.
1、尾矿高浓度输送主要采用的技术是对原有浓密机进行高效化改造，或采用高效浓密机使浓密机底流浓度达到45%以上，然后输送到尾矿库，这种方式只是减少了水的损失，节约了运行成本，但上述问题并没有从根本上解决。 1. The high-concentration tailings transportation mainly adopts the high-efficiency transformation of the original thickener, or uses a high-efficiency thickener to make the underflow concentration of the thickener reach more than 45%, and then transports it to the tailings pond. This method only reduces The loss of water saves operating costs, but the above problems have not been fundamentally resolved.
2、膏体排放虽然可以解决水利用和环保问题，但对尾矿粒度组成要求比较严格，其中小于20微米的含量必须达到15%以上，该级别可以防止水的渗流，因此并不是所有尾矿都适用，特别是目前铁尾矿目前应用还比较少。除形成膏体对粒度有严格要求外，输送膏体的设备活塞泵对尾矿粒度要求也比较严格，一般最大颗粒不允许超过0.3mm，由于上述原因限制了膏体排放的推广。 2. Although the discharge of paste can solve the problems of water utilization and environmental protection, the requirements for the particle size composition of tailings are relatively strict, and the content of less than 20 microns must reach more than 15%. This level can prevent water seepage, so not all tailings All are applicable, especially the current application of iron tailings is still relatively small. In addition to the strict requirements on the particle size of the paste, the piston pump, the equipment for conveying the paste, also has strict requirements on the particle size of the tailings. Generally, the largest particle is not allowed to exceed 0.3mm. Due to the above reasons, the promotion of paste discharge is limited.
3、尾矿干排是将尾矿通过浓缩、脱水过滤后，在水分达到小于15%条件下可以直接运输的一种方法。这种方法不但解决了上述问题，还不需要建尾矿库。目前尾矿干排工艺主要有“浓密机+旋流器+过滤机”、“浓密机+过滤机”和“旋流器+浓密机+脱水筛”三种，存在的主要缺点是：由于这三种工艺相对独立，处理的是全流程尾矿或者全粒级尾矿，对于大型选矿企业来说，需要配套的浓缩、脱水和过滤设备设施规模大，大幅度增加了投资和后续运营成本，因此目前国内外大型选矿企业采用该工艺的还比较少，一般都是尾矿处理量150吨/小时以下的中小选矿企业采用了这种工艺。 3. Tailings dry discharge is a method in which the tailings can be directly transported under the condition that the water content is less than 15% after concentration, dehydration and filtration. This method not only solves the above problems, but also does not need to build tailings ponds. At present, there are three main tailings dry discharge processes: "thickener + cyclone + filter", "thickener + filter" and "cyclone + thickener + dewatering screen". The main disadvantages are: due to this The three processes are relatively independent, and they deal with full-process tailings or full-size tailings. For large-scale mineral processing enterprises, the supporting equipment for concentration, dehydration and filtration is large-scale, which greatly increases investment and subsequent operating costs. Therefore, at present, there are relatively few large-scale mineral processing enterprises at home and abroad using this process, and generally small and medium-sized mineral processing enterprises with a tailings treatment capacity of less than 150 tons/hour have adopted this process.
目前贫磁铁矿石选矿过程尾矿处理工艺过程一般为：1、将贫磁铁矿矿石破碎到合适的粒度后通过干式磁选机来提高入选矿石的品位，干式磁选机抛出的合格粗粒级尾矿直接作为废石运走或继续进行加工利用，干式磁选机的精矿产品继续经过闭路破碎和筛分后，不合格的产品返回破碎机，粒度合格的产品给入后续作业，粒度一般要求为12mm以下。后续作业主要包括磨矿、选别、浓缩和过滤等作业。后续作业中的磨矿作业一般为二段或者三段，一般都采用球磨机；后续作业中的选别作业一般为五到八段选别，一般都采用磁选机、磁力脱水槽等磁选设备；后续作业中的浓缩设备一般都采用普通浓密机或高效浓密机；后续作业中的过滤设备一般为真空过滤机或压滤机等设备；2、满足后续作业粒度要求的干式磁选机的精矿产品，经过上述后续作业后精矿品位进一步提高，最终生产出合格铁精矿；上述后续作业产生的尾矿主要来自于各段选别作业，即磁选机和磁力脱水槽等选别设备，其尾矿一般自流进入尾矿浓密机，经过浓缩后用泵输送到尾矿库贮存。或者先经过尾矿浓缩机浓缩后，尾矿浓密机的底流给入过滤机，将水分降低到15%以下后，通过皮带运输机进行尾矿干排。目前这种贫磁铁矿选矿过程尾矿处理工艺存在的主要缺陷是：1、若将尾矿经过浓缩后，直接用泵输送到尾矿库贮存，不仅对环境易造成不良影响，也增加了安全隐患，而且大量占用土地，增加了矿山投资和尾矿库的运营成本；2、若先将尾矿先通过浓密机浓缩后，再进行尾矿过滤，最后通过皮带运输机进行干排，虽然解决了上述问题，但由于后续选别作业尾矿产率一般都超过总矿石处理量的60%以上，需要浓缩和过滤的尾矿量巨大，势必造成尾矿浓缩和过滤系统的投资和运行成本过高，因此目前大型和特大型铁矿选矿企业至今很少有采用的。 At present, the tailings treatment process of the lean magnetite ore beneficiation process is generally as follows: 1. After the lean magnetite ore is crushed to a suitable particle size, the grade of the selected ore is improved through a dry magnetic separator, and the qualified ore thrown out by the dry magnetic separator is The coarse-grained tailings are directly transported away as waste rock or continue to be processed and utilized. After the concentrate products of the dry magnetic separator continue to undergo closed-circuit crushing and screening, the unqualified products are returned to the crusher, and the qualified products are sent to the follow-up Operation, the particle size is generally required to be below 12mm. Subsequent operations mainly include grinding, sorting, concentrating and filtering. The grinding operation in the follow-up operation is generally two or three stages, and ball mills are generally used; the separation operation in the follow-up operation is generally five to eight stages of separation, and magnetic separation equipment such as magnetic separators and magnetic dehydration tanks are generally used. ; Concentration equipment in follow-up operations generally adopts ordinary thickeners or high-efficiency thickeners; filter equipment in follow-up operations is generally vacuum filters or filter presses and other equipment; 2. Dry magnetic separators that meet the particle size requirements of follow-up operations Concentrate products, after the above follow-up operations, the grade of the concentrate is further improved, and finally qualified iron ore concentrates are produced; the tailings produced by the above follow-up operations mainly come from the separation operations of each stage, that is, the separation of magnetic separators and magnetic dehydration tanks Its tailings generally flow into the tailings thickener by itself, and after thickening, they are pumped to the tailings storage for storage. Or after being concentrated by the tailings thickener first, the underflow of the tailings thickener is fed into the filter to reduce the moisture to below 15%, and then the tailings are dry discharged through the belt conveyor. The main defects in the tailings treatment process of this lean magnetite beneficiation process at present are: 1. If the tailings are directly pumped to the tailings storage after being concentrated, it will not only easily cause adverse effects on the environment, but also increase the Potential safety hazards, and a large amount of land occupation, increased mine investment and tailings pond operating costs; 2. If the tailings are first concentrated by a thickener, then the tailings are filtered, and finally dry-drained by a belt conveyor, although it is solved However, since the tailings production rate of subsequent sorting operations generally exceeds 60% of the total ore processing capacity, the amount of tailings that needs to be concentrated and filtered is huge, which will inevitably lead to high investment and operating costs for the tailings concentration and filtration system. , so the current large and extra-large iron ore beneficiation enterprises have rarely adopted so far.
发明内容 Contents of the invention
本发明的目的是为了克服铁矿石选矿过程特别是磁铁矿选矿过程铁尾矿处理工艺中目前存在的上述缺陷，为大中型磁铁矿选矿企业生产过程提供一种经济、高效和环保的贫磁铁矿石选矿过程尾矿处理工艺，在提高尾矿处理效率的同时，改善尾矿处理工艺，降低尾矿处理运营成本。 The purpose of the present invention is to overcome the above-mentioned defects currently existing in the iron ore beneficiation process, especially the iron tailings treatment process of the magnetite beneficiation process, and provide an economical, efficient and environmentally friendly process for the production process of large and medium-sized magnetite beneficiation enterprises. The tailings treatment process of the lean magnetite ore beneficiation process improves the tailings treatment process while improving the tailings treatment efficiency, and reduces the operating cost of the tailings treatment.
本发明的目的是通过下述技术方案来实现的： The purpose of the present invention is achieved through the following technical solutions:
本发明的一种贫磁铁矿石选矿过程尾矿处理工艺，包括经过粗、中破碎后粒度小于50mm、品位35%以下的贫磁铁矿石给入高压辊磨机和筛分机闭路磨矿作业处理后，粒度小于3mm占90%以上的筛下产品给入粗选磁选机，粗选磁选机的精矿给入磨矿、磁选、浓缩和过滤组成的后续作业，其特征在于还包括下列步骤： The tailings treatment process of a lean magnetite ore beneficiation process of the present invention includes feeding the lean magnetite ore with a particle size of less than 50mm and a grade of less than 35% after coarse and medium crushing into a high-pressure roller mill and a screener for closed-circuit grinding operation, The under-screen products with a particle size of less than 3mm accounting for more than 90% are fed into the roughing magnetic separator, and the concentrate of the roughing magnetic separator is fed into the follow-up operation consisting of grinding, magnetic separation, concentration and filtration, which is characterized in that it also includes the following steps :
粗选磁选机的尾矿给入浓缩旋流器进行浓缩作业，浓缩旋流器浓缩后浓度达55%以上的底流产品自流给入尾矿脱水筛进行脱水作业；脱水筛的筛上产品经过尾矿干排皮带运输机运往尾矿堆场或尾矿库贮存，浓缩旋流器的溢流产品、含水率小于15%的脱水筛的筛下产品以及后续选别作业的尾矿一并给入尾矿浓缩机进行浓缩作业，尾矿浓缩机的溢流作为生产循环用水，尾矿浓缩机浓度大于65%的底流产品给入尾矿压滤机进行过滤，压滤机的滤液、回流产品返回尾矿浓缩机，含水率小于12%的尾矿压滤机滤饼同样给入尾矿干排皮带运输机运往尾矿堆场或尾矿库贮存。 The tailings of the roughing magnetic separator are sent to the concentration cyclone for concentration operation, and the underflow products with a concentration of more than 55% after concentration in the concentration cyclone flow into the tailings dewatering screen for dehydration; the products on the dehydration screen pass through The tailings dry discharge belt conveyor is transported to the tailings yard or tailings pond for storage, and the overflow product of the thickening cyclone, the under-screen product of the dewatering screen with a moisture content of less than 15% and the tailings of the subsequent sorting operation are fed together The tailings thickener performs the thickening operation, the overflow of the tailings thickener is used as production circulation water, the underflow product with a concentration greater than 65% of the tailings thickener is sent to the tailings filter press for filtration, and the filtrate and reflux products of the filter press are returned The tailings thickener and the tailings filter press filter cake with a moisture content of less than 12% are also sent to the tailings dry discharge belt conveyor and transported to the tailings yard or tailings storage.
本发明的优点是： The advantages of the present invention are:
针对贫磁铁矿选矿过程粗磁选作业尾矿粒度粗、尾矿产率高的特点，优先将选别过程近一半的粗粒级尾矿进行干排处理，其余尾矿经过浓缩和压滤后一起实现尾矿干排，全面优化了贫磁铁矿选矿过程尾矿处理工艺，该工艺显著减轻了尾矿浓缩机和后续尾矿处理设备的处理量，减少了尾矿处理设备设施的投资和占地面积，改善了尾矿处理工艺，降低了尾矿处理运营成本，实现节能和环保双赢。 In view of the characteristics of coarse-grained tailings and high tailings yield in the rough magnetic separation process of lean magnetite ore beneficiation, nearly half of the coarse-grained tailings in the separation process are given priority to dry discharge treatment, and the remaining tailings are concentrated and filtered Together to achieve tailings dry discharge, fully optimize the tailings treatment process in the lean magnetite beneficiation process, this process significantly reduces the processing capacity of tailings thickeners and subsequent tailings treatment equipment, and reduces the investment and cost of tailings treatment equipment and facilities It covers an area of land, improves the tailings treatment process, reduces the operating cost of tailings treatment, and achieves a win-win situation of energy saving and environmental protection.
附图说明 Description of drawings
图1为本发明的工艺流程图。 Fig. 1 is a process flow diagram of the present invention.
具体实施方式 detailed description
下面结合附图进一步说明本发明的具体实施方式。 The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.
如图1所示，本发明的一种贫磁铁矿石选矿过程尾矿处理工艺，包括经过粗、中破碎后粒度小于50mm、品位35%以下的贫磁铁矿石给入高压辊磨机和筛分机闭路磨矿作业处理后，粒度小于3mm占90%以上的筛下产品给入粗选磁选机，粗选磁选机的精矿给入磨矿、磁选、浓缩和过滤组成的后续作业，其特征在于还包括下列步骤： As shown in Figure 1, a tailings treatment process of a lean magnetite ore beneficiation process of the present invention includes feeding the lean magnetite ore with a particle size of less than 50mm and a grade of 35% or less after coarse and medium crushing into a closed circuit of a high pressure roller mill and a screening machine After the grinding operation, the under-screen products with a particle size of less than 3mm accounting for more than 90% are fed into the roughing magnetic separator, and the concentrate of the roughing magnetic separator is fed into the follow-up operation consisting of grinding, magnetic separation, concentration and filtration. It is characterized in that it also includes the following steps:
粗选磁选机的尾矿给入浓缩旋流器进行浓缩作业，浓缩旋流器浓缩后浓度达55%以上的底流产品自流给入尾矿脱水筛进行脱水作业；所述的尾矿脱水筛的筛孔尺寸为0.5～1.5mm，脱水筛的筛上产品经过尾矿干排皮带运输机运往尾矿堆场或尾矿库贮存，浓缩旋流器的溢流产品、含水率小于15%的脱水筛的筛下产品以及后续选别作业的尾矿一并给入尾矿浓缩机进行浓缩作业。本发明的尾矿浓缩机采用高效深锥浓密机，尾矿浓缩机的溢流作为生产循环用水，尾矿浓缩机浓度大于65%的底流产品给入尾矿压滤机进行过滤，压滤机的滤液、回流产品返回尾矿浓缩机，含水率小于12%的尾矿压滤机滤饼同样给入尾矿干排皮带运输机运往尾矿堆场或尾矿库贮存。 The tailings of the roughing magnetic separator are fed into the concentration cyclone for concentration operation, and the bottom flow product with a concentration of more than 55% after concentration in the concentration cyclone is automatically fed into the tailings dewatering screen for dehydration operation; the tailings dewatering screen The sieve size of the dewatering screen is 0.5-1.5mm. The products on the screen of the dewatering screen are transported to the tailings yard or tailings storage by the tailings dry belt conveyor. The screened products and the tailings of the subsequent sorting operation are fed into the tailings thickener for thickening. The tailings thickener of the present invention adopts a high-efficiency deep cone thickener, and the overflow of the tailings thickener is used as production circulation water, and the underflow product with a concentration greater than 65% of the tailings thickener is fed into the tailings filter press for filtration, and the filter press The filtrate and return products are returned to the tailings thickener, and the filter cake of the tailings filter press with a moisture content of less than 12% is also sent to the tailings dry row belt conveyor and transported to the tailings yard or tailings storage.
本发明结合贫磁铁矿石的特点，优先将选别过程近一半的粗粒级尾矿进行干排处理，其余尾矿经过浓缩和压滤后一起实现尾矿干排，全面优化了贫磁铁矿选矿过程尾矿处理工艺，特别适合于处理能力500万吨以上的大型或特大型贫磁铁矿选矿生产企业新建或改造采用。既可以减少占地面积、节省投资，又不需要单独建设尾矿库，可进一步降低运营成本，解决目前大多数选矿企业面临的尾矿库安全和环保护等难题。 The present invention combines the characteristics of lean magnetite ore, preferentially dry-discharges nearly half of the coarse-grained tailings in the sorting process, and realizes dry-discharge of tailings together with the rest of the tailings after concentration and pressure filtration, which fully optimizes the lean magnetite The tailings treatment process in the beneficiation process is especially suitable for the new construction or renovation of large or extra-large lean magnetite beneficiation production enterprises with a processing capacity of more than 5 million tons. It can not only reduce the occupied area and save investment, but also does not need to build a separate tailings pond, which can further reduce operating costs and solve the problems of tailings pond safety and environmental protection faced by most mineral processing enterprises.
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| CN107188388A (en) * | 2017-07-11 | 2017-09-22 | 烟台禹顺环保科技有限公司 | A kind of dry-discharge system for tailings and method |
| CN107477366A (en) * | 2017-07-17 | 2017-12-15 | 首钢集团有限公司 | A kind of feed system and process |
| CN111035991A (en) * | 2019-12-10 | 2020-04-21 | 山东省冶金设计院股份有限公司 | Dry-discharging and dewatering system and process for iron tailings |
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| CN111097205A (en) * | 2019-12-20 | 2020-05-05 | 仇爽 | Movable system sand system |
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| CN111749701A (en) * | 2020-05-19 | 2020-10-09 | 大连船舶重工集团有限公司 | Large-scale offshore mining, selecting and storing integrated engineering ship |
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Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Applicant after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Applicant before: Angang Group Mine Company |
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