CN106673071A - Method for removing iron from laterite nickel ore pickling liquid and producing iron oxide black pigment at the same time - Google Patents
Method for removing iron from laterite nickel ore pickling liquid and producing iron oxide black pigment at the same time Download PDFInfo
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 62
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 54
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 47
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 33
- 239000000049 pigment Substances 0.000 title claims abstract description 32
- 239000011504 laterite Substances 0.000 title claims abstract description 26
- 229910001710 laterite Inorganic materials 0.000 title claims abstract description 26
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 24
- 239000007788 liquid Substances 0.000 title claims description 13
- 238000005554 pickling Methods 0.000 title claims description 7
- 239000002253 acid Substances 0.000 claims abstract description 32
- 238000002386 leaching Methods 0.000 claims abstract description 23
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims abstract description 14
- 230000003647 oxidation Effects 0.000 claims abstract description 9
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 9
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims abstract description 7
- 235000019341 magnesium sulphate Nutrition 0.000 claims abstract description 7
- 239000000243 solution Substances 0.000 claims description 36
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 23
- 239000012065 filter cake Substances 0.000 claims description 19
- 239000003638 chemical reducing agent Substances 0.000 claims description 11
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 8
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical group O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- 239000011790 ferrous sulphate Substances 0.000 claims description 4
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 4
- UCNNJGDEJXIUCC-UHFFFAOYSA-L hydroxy(oxo)iron;iron Chemical compound [Fe].O[Fe]=O.O[Fe]=O UCNNJGDEJXIUCC-UHFFFAOYSA-L 0.000 claims description 4
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 4
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 4
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 4
- 238000007598 dipping method Methods 0.000 claims description 3
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 3
- 239000000347 magnesium hydroxide Substances 0.000 claims description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 239000000706 filtrate Substances 0.000 claims description 2
- JESHZQPNPCJVNG-UHFFFAOYSA-L magnesium;sulfite Chemical compound [Mg+2].[O-]S([O-])=O JESHZQPNPCJVNG-UHFFFAOYSA-L 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000005660 chlorination reaction Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000002351 wastewater Substances 0.000 abstract description 4
- HLQCPNUQRKCTJD-UHFFFAOYSA-N [Na].[Fe].[V] Chemical compound [Na].[Fe].[V] HLQCPNUQRKCTJD-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052598 goethite Inorganic materials 0.000 abstract description 2
- AEIXRCIKZIZYPM-UHFFFAOYSA-M hydroxy(oxo)iron Chemical compound [O][Fe]O AEIXRCIKZIZYPM-UHFFFAOYSA-M 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 239000002893 slag Substances 0.000 abstract 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 229960002089 ferrous chloride Drugs 0.000 description 3
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 3
- -1 printing Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009854 hydrometallurgy Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 159000000003 magnesium salts Chemical class 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000001034 iron oxide pigment Substances 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 1
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical group O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
- C01G49/08—Ferroso-ferric oxide [Fe3O4]
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/40—Magnesium sulfates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Compounds Of Iron (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
一种红土镍矿酸浸液除铁同时生产氧化铁黑颜料的方法，该工艺针对原有红土镍矿酸浸液现有的黄钠铁钒法或针铁矿法等除铁方式，产生大量的含铁废渣，占用大面积土地，成本高且污染环境的现象，设计还原和氧化工艺结合，使红土镍矿酸浸液实现除铁的同时生产符合国标的氧化铁黑颜料，废水用于回收硫酸镁；相对于其他湿法氧化铁黑工艺。本发明的优点是：本工艺是废弃铁资源合理化利用，相对单位成本可以降低30％以上，对红土镍矿湿法工艺的铁元素资源化处置有重大创新意义，属于清洁生产工艺。
A method for removing iron from laterite-nickel ore acid leaching solution and producing iron oxide black pigment at the same time. The process aims at the existing methods of removing iron such as yellow sodium iron vanadium method or goethite method in the original laterite-nickel ore acid leaching solution, and produces a large amount of The iron-containing waste slag occupies a large area of land, is costly and pollutes the environment. The combination of reduction and oxidation processes is designed so that the laterite nickel ore acid leaching solution can achieve iron removal while producing iron oxide black pigments that meet the national standard. The waste water is used for recycling. Magnesium sulfate; compared to other wet iron oxide black processes. The invention has the advantages that: the process is a rational utilization of waste iron resources, and the relative unit cost can be reduced by more than 30%, which has great innovative significance for the iron element resource disposal of the laterite nickel ore wet process, and belongs to the clean production process.
Description
技术领域technical field
本发明涉及一种红土镍矿酸浸液除铁同时生产氧化铁黑颜料的方法，属于资源环境领域。The invention relates to a method for producing iron oxide black pigment while removing iron from laterite nickel ore acid leaching solution, belonging to the field of resources and environment.
背景技术Background technique
红土镍湿法生产镍时，常用硫酸(或者盐酸)酸浸，酸浸液含有溶解的大量硫酸铁、硫酸亚铁(或者氯化铁、氯化亚铁)，同时溶液还有大量的硫酸镁、硫酸铝、硫酸镍、硅等成分；现有的酸浸液除铁方式主要是黄钠铁钒法或针铁矿法，都产生大量的含铁废渣，占用大面积土地，浪费了铁资源且污染环境。近年来随着国家对清洁生产的要求提高及人们环保意识的增强，国内外关于废物处理和再生利用的各项法规逐步实施，对废物的处理要求也越来越高，造成湿法冶镍企业处置废渣严重负担。将酸浸液中的铁元素资源化利用，除铁同时生产氧化铁黑颜料，既可以减少废渣处置费用，又可以产生显著的效益，符合循环经济的理念和清洁生产促进法要求。When producing nickel by laterite nickel wet method, acid leaching with sulfuric acid (or hydrochloric acid) is commonly used. The pickling solution contains a large amount of dissolved ferric sulfate, ferrous sulfate (or ferric chloride, ferrous chloride), and the solution also contains a large amount of magnesium sulfate. , aluminum sulfate, nickel sulfate, silicon and other components; the existing methods of iron removal in acid leaching are mainly yellow sodium iron vanadium method or goethite method, which produce a large amount of iron-containing waste residue, occupy a large area of land, and waste iron resources And pollute the environment. In recent years, with the improvement of the country's requirements for cleaner production and the enhancement of people's awareness of environmental protection, various laws and regulations on waste treatment and recycling at home and abroad have been gradually implemented, and the requirements for waste treatment are also getting higher and higher, resulting in hydrometallurgy nickel enterprises. Disposal of waste residues is a serious burden. The resource utilization of iron element in the pickling solution, iron removal and production of iron oxide black pigment can not only reduce the cost of waste residue disposal, but also produce significant benefits, which is in line with the concept of circular economy and the requirements of the clean production promotion law.
氧化铁黑简称铁黑，分子式为FeO或FeO·FeO，化学名称为四氧化三铁。氧化铁黑具有饱和的蓝墨光黑色，遮盖力和着色力均很高，广泛应用于建材、水泥、油墨、印刷、塑料等着色领域。近年来，我国氧化铁黑的需求量不断增加，年增长率高达107％，远远高于整个氧化铁颜料36.6％的增长率，是仅次于铁红和铁黄的铁系颜料。目前生产氧化铁黑的方法有干法和湿法两大类，干法主要有铁鳞粉碎法、还原铁泥法等，湿法有使用硫酸亚铁、氯化亚铁等为原料的钠碱法、氨碱法等。干法铁黑质量不高，使用范围窄；湿法，工艺繁长，成本高，需要大量的酸液或者碱液参与反应，同时排放大量含盐废水，给企业带来严重负担，也对环境造成巨大压力。Iron oxide black is referred to as iron black for short, its molecular formula is FeO or FeO·FeO, and its chemical name is ferric oxide. Iron oxide black has saturated blue ink black, high hiding power and tinting power, and is widely used in coloring fields such as building materials, cement, ink, printing, and plastics. In recent years, the demand for iron oxide black in my country has continued to increase, with an annual growth rate of 107%, which is far higher than the 36.6% growth rate of the entire iron oxide pigment, and is second only to iron red and iron yellow iron pigments. At present, there are two types of methods for producing iron oxide black: dry method and wet method. The dry method mainly includes iron scale crushing method, reduced iron mud method, etc., and the wet method includes sodium alkali using ferrous sulfate and ferrous chloride as raw materials. method, ammonia-soda method, etc. The dry iron black method is of low quality and has a narrow application range; the wet method requires a long process and high cost, and requires a large amount of acid or lye to participate in the reaction, and at the same time discharges a large amount of salty wastewater, which brings a serious burden to the enterprise and also affects the environment. cause great pressure.
红土镍矿酸浸液组分负杂，溶液浓度很高，含有大量Fe3+和Fe2+离子，往往Fe3+含量>Fe2+含量，用常规湿法工艺，不能得到颜色合格的氧化铁黑颜料；同时由于加入大量钠、氨离子，带来大量废水处置的负担；低成本解决以上问题，在酸浸液除铁的同时产出合格的氧化铁黑颜料，有着显著经济效益和社会效益。The components of laterite nickel ore acid leaching solution are negatively impurity, the solution concentration is very high, and it contains a large amount of Fe3+ and Fe2+ ions, often the Fe3+ content is greater than the Fe2+ content. With the conventional wet process, iron oxide black pigments with qualified colors cannot be obtained; at the same time, due to the addition of a large amount of Sodium and ammonium ions bring the burden of a large amount of wastewater disposal; low-cost solutions to the above problems, while removing iron in the acid leaching solution, produce qualified iron oxide black pigments, which have significant economic and social benefits.
发明内容Contents of the invention
本发明的目的是针对上述存在问题，提供一种红土镍矿酸浸液除铁同时生产氧化铁黑颜料的方法，该方法采用镁盐作为中和剂，添加还原剂调整酸浸液Fe3+和Fe2+浓度，再通过氧化调整氧化铁黑颜料色相的工艺，该方法投入资金少、产品质量可靠，废液可以回收硫酸镁，有显著的经济效益，属于清洁生产工艺。The object of the present invention is to address above-mentioned existing problems, provide a kind of laterite-nickel ore acid leaching liquid to remove iron and produce the method for iron oxide black pigment simultaneously, this method adopts magnesium salt as neutralizing agent, adds reducing agent and adjusts acid leaching liquid Fe3+ and Fe2+ concentration, and then adjust the hue of iron oxide black pigment by oxidation. This method requires less investment and reliable product quality. Magnesium sulfate can be recovered from waste liquid, which has significant economic benefits and belongs to the clean production process.
本发明的技术方案：Technical scheme of the present invention:
一种红土镍矿酸浸液除铁同时生产氧化铁黑颜料的方法，步骤如下：A kind of laterite nickel ore acid leaching liquid removes iron and produces the method for iron oxide black pigment simultaneously, and the steps are as follows:
1)在PH<5的红土镍矿酸浸液中加入还原剂，得到红土镍矿酸浸液还原液，还原液中Fe3+与Fe2+的摩尔比为0.3-1.1：1；1) Add a reducing agent to the laterite nickel ore acid leaching solution with pH<5 to obtain a laterite nickel ore acid leaching solution reducing solution, and the molar ratio of Fe3+ to Fe2+ in the reducing solution is 0.3-1.1:1;
2)在红土镍矿酸浸液还原液中通入蒸汽加热到60-90℃，加入氧化镁或氢氧化镁调节pH为6-10，在60-90℃温度下通入空气氧化，至氧化铁黑颜料的颜色达到标准要求后停止氧化；2) Heat steam to 60-90°C in laterite nickel ore acid leach reducing solution, add magnesium oxide or magnesium hydroxide to adjust the pH to 6-10, pass air at 60-90°C to oxidize Stop oxidation after the color of the iron black pigment meets the standard requirements;
3)将上述氧化合格的酸浸液进入压滤机过滤，固体物为氧化铁黑滤饼，滤饼用3-20wt％氢氧化钠水溶液进行打浆洗涤，氢氧化钠用量小于等于滤饼质量的3wt％；得到氧化铁黑滤饼，滤液进入后续回收硫酸镁工序；3) The above-mentioned oxidized acid dipping solution is entered into a filter press to filter, and the solid is iron oxide black filter cake, and the filter cake is beaten and washed with 3-20wt% sodium hydroxide aqueous solution, and the sodium hydroxide consumption is less than or equal to 50% of the filter cake quality. 3wt%; Obtain iron oxide black filter cake, and filtrate enters follow-up reclaiming magnesium sulfate operation;
4)将上述氧化铁黑滤饼在80-150℃下脱水烘干；4) dehydrating and drying the above iron oxide black filter cake at 80-150°C;
5)烘干后的氧化铁黑颜料经过粉碎，生产符合GB/T1863-2008(A类)标准要求的氧化铁黑颜料。5) The dried iron oxide black pigment is pulverized to produce iron oxide black pigment meeting the requirements of GB/T1863-2008 (Class A) standard.
所述步骤1)中还原剂为二氧化硫、亚硫酸镁、硫酸亚铁和氯化亚铁中的一种或两种以上任意比例的混合物；还原剂与Fe3+的摩尔比为0.1-1.5：1。The reducing agent in the step 1) is sulfur dioxide, magnesium sulfite, ferrous sulfate and ferrous chloride or a mixture of two or more in any proportion; the molar ratio of reducing agent to Fe3+ is 0.1-1.5:1.
本发明的有益效果是：The beneficial effects of the present invention are:
1)红土镍矿酸浸液正常时Fe3浓度>Fe2+浓度，本发明使用还原剂调节Fe3+和Fe2+浓度比例，有利于控制氧化铁黑色相，保证产品质量；同时不产生含铁废渣，大幅减少了环保处置费用；1) Fe3concentration>Fe2+concentration when laterite-nickel ore pickling solution is normal, the present invention uses reductant to regulate Fe3+ and Fe2+concentration ratio, helps to control iron oxide black phase, guarantees product quality; Environmental disposal costs;
2)本发明使用镁盐调节pH，不引入其他杂质离子，有利于后续回收硫酸镁，使湿法冶镍系统综合成本大幅降低；2) The present invention uses magnesium salt to adjust the pH without introducing other impurity ions, which is beneficial to the subsequent recovery of magnesium sulfate and greatly reduces the comprehensive cost of the hydrometallurgy nickel system;
3)本发明设计还原和氧化工艺结合，使红土镍矿酸浸液实现除铁的同时生产符合国标的氧化铁黑颜料，废水用于后续回收硫酸镁；相对于其他湿法氧化铁黑工艺，本工艺是废弃铁资源利用，相对单位成本可以降低30％以上，对红土镍矿湿法工艺的铁元素资源化处置有重大创新意义，属于清洁生产工艺。3) The present invention designs the combination of reduction and oxidation processes, so that the iron oxide black pigment that meets the national standard can be produced while the laterite nickel ore acid leaching solution realizes iron removal, and the waste water is used for subsequent recovery of magnesium sulfate; compared with other wet iron oxide black processes, This process is the utilization of waste iron resources, and the relative unit cost can be reduced by more than 30%. It has great innovative significance for the resource disposal of iron elements in the laterite nickel ore wet process, and belongs to the clean production process.
附图说明Description of drawings
图1是本发明工艺流程示意图。Fig. 1 is a schematic diagram of the process flow of the present invention.
具体实施方式detailed description
以下通过实施例进一步说明，但不构成对本发明的限制。The following examples further illustrate, but do not constitute a limitation of the present invention.
实施例1：Example 1:
一种红土镍矿酸浸液除铁同时生产氧化铁黑颜料的方法，步骤如下：A kind of laterite nickel ore acid leaching liquid removes iron and produces the method for iron oxide black pigment simultaneously, and the steps are as follows:
1)在反应器中加入1000Kg红土镍矿酸浸液pH＝4，Fe203含量为6.0wt％，加入SO2还原剂15Kg，使Fe3+:Fe2+调节到0.7:1；1) Add 1000Kg laterite nickel ore acid leach solution pH=4 in the reactor, Fe 2 0 3 content is 6.0wt%, add SO2 reducing agent 15Kg, make Fe3+:Fe2+ be adjusted to 0.7:1;
2)在反应器中将红土镍矿酸浸液还原液通入蒸汽加热到90℃，加氧化镁30kg调节pH＝6.5，反应器温度保持90℃，通入空气氧化30分钟，至氧化铁黑颜料的颜色达到标准要求后停止氧化；2) Heat the reducing solution of laterite nickel ore acid leaching solution in the reactor to 90°C, add 30kg of magnesium oxide to adjust the pH=6.5, keep the temperature of the reactor at 90°C, and pass in air for 30 minutes to oxidize until the iron oxide black Stop oxidation after the color of the pigment meets the standard requirements;
3)氧化合格的酸浸液进入压滤机过滤，固体物为氧化铁黑滤饼，滤饼5wt％氢氧化钠溶液10千克进行打浆洗涤，进入烘干工序，过滤液体进入其他工序；3) the qualified acid dipping liquid of oxidation enters filter press filter, and solid matter is iron oxide black filter cake, and filter cake 5wt% sodium hydroxide solution 10 kilograms is beaten and washed, enters drying process, and filtered liquid enters other processes;
4)氧化铁黑滤饼进入烘干系统，在100℃条件脱水烘干；4) The iron oxide black filter cake enters the drying system and is dehydrated and dried at 100°C;
5)烘干后的氧化铁黑颜料经过粉碎，生产出59.5kg符合GB/T1863-2008(A类)标准要求的氧化铁黑颜料。图1是本发明工艺流程示意图。5) The dried iron oxide black pigment was pulverized to produce 59.5 kg of iron oxide black pigment meeting the requirements of GB/T1863-2008 (Class A) standard. Fig. 1 is a schematic diagram of the process flow of the present invention.
实施例2：Example 2:
一种红土镍矿酸浸液除铁同时生产氧化铁黑颜料的方法，步骤如下：A kind of laterite nickel ore acid leaching liquid removes iron and produces the method for iron oxide black pigment simultaneously, and the steps are as follows:
1)在反应器中加入1000Kg红土镍矿酸浸液，pH＝4，Fe203含量为4.5wt％，加入FeSO4还原剂10Kg，使Fe3+:Fe2+调节到0.9:1。1) Add 1000Kg laterite nickel ore acid leaching solution into the reactor, pH=4, Fe 2 0 3 content is 4.5wt%, add FeSO 4 reducing agent 10Kg, adjust Fe3+:Fe2+ to 0.9:1.
2)在反应器中将红土镍矿酸浸液还原液通入蒸汽加热到80℃，加氧化镁20kg调节pH＝6.2，反应器温度保持80℃，通入空气氧化40分钟，至氧化铁黑颜料的颜色达到标准要求后停止氧化；2) Heat the reducing solution of laterite nickel ore acid leaching solution in the reactor to 80°C, add 20kg of magnesium oxide to adjust the pH=6.2, keep the temperature of the reactor at 80°C, and pass in air for 40 minutes to oxidize until the iron oxide black Stop oxidation after the color of the pigment meets the standard requirements;
3)氧化合格的酸浸液进入压滤机过滤，固体物为氧化铁黑滤饼，滤饼用3wt％氢氧化钠溶液10千克进行打浆洗涤，进入烘干工序，过滤液体进入其他工序。3) The oxidized pickling solution qualified enters the filter press to filter, and the solid matter is iron oxide black filter cake, and the filter cake is beaten and washed with 10 kg of 3wt% sodium hydroxide solution, enters the drying process, and the filtered liquid enters other processes.
4)氧化铁黑滤饼进入烘干系统，在110℃条件脱水烘干。4) The iron oxide black filter cake enters the drying system and is dehydrated and dried at 110°C.
5)烘干后的氧化铁黑颜料经过粉碎，生产出49.2kg符合GB/T1863-2008(A类)标准要求的氧化铁黑颜料。图1是本发明工艺流程示意图。5) The dried iron oxide black pigment was pulverized to produce 49.2 kg of iron oxide black pigment meeting the requirements of GB/T1863-2008 (Class A) standard. Fig. 1 is a schematic diagram of the process flow of the present invention.
实施例3：Example 3:
一种红土镍矿酸浸液除铁同时生产氧化铁黑颜料的方法，步骤如下：A kind of laterite nickel ore acid leaching liquid removes iron and produces the method for iron oxide black pigment simultaneously, and the steps are as follows:
1)在反应器中加入1000Kg红土镍矿酸浸液，pH＝4.3，Fe20含量为5.0wt％，加入FeSO4还原剂8Kg，使Fe3+:Fe2+调节到0.6:1。1) Add 1000Kg laterite nickel ore acid leaching solution into the reactor, pH=4.3, Fe 2 O content is 5.0wt%, add FeSO 4 reducing agent 8Kg, adjust Fe3+:Fe2+ to 0.6:1.
2)在反应器中将红土镍矿酸浸液还原液通入蒸汽加热到90℃，加氢氧化镁30kg调节pH＝6.8，反应器温度保持90℃，通入空气氧化60分钟，至氧化铁黑颜料的颜色达到标准要求后停止氧化；2) In the reactor, pass the laterite nickel ore acid leach reducing solution into the steam to heat to 90°C, add 30kg of magnesium hydroxide to adjust the pH=6.8, keep the temperature of the reactor at 90°C, and pass in air for 60 minutes to oxidize to iron oxide Stop oxidation after the color of the black pigment meets the standard requirements;
3)氧化合格的酸浸液进入压滤机过滤，固体物为氧化铁黑滤饼，滤饼3wt％氢氧化钠溶液10千克进行打浆洗涤，进入烘干工序，过滤液体进入其他工序。3) The oxidized pickling solution qualified enters the filter press to filter, and the solid matter is iron oxide black filter cake, and 10 kilograms of filter cake 3wt% sodium hydroxide solution is beaten and washed, enters the drying process, and the filtered liquid enters other processes.
4)氧化铁黑滤饼进入烘干系统，在120℃条件脱水烘干。4) The iron oxide black filter cake enters the drying system and is dehydrated and dried at 120°C.
5)烘干后的氧化铁黑颜料经过粉碎，生产出53.1kg符合GB/T1863-2008(A类)标准要求的氧化铁黑颜料。5) The dried iron oxide black pigment was pulverized to produce 53.1 kg of iron oxide black pigment meeting the requirements of GB/T1863-2008 (Class A) standard.
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