A method for comprehensive utilization of nickel-containing ore

A technology of ore and ore, which is applied in the field of comprehensive utilization of nickel-containing ore, can solve the problems of large amount of slag, large environmental pollution, and large investment, and achieve the effects of high resource utilization rate, no industrial waste discharge, and low investment

Active Publication Date: 2019-01-08
广西赛可昱新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a method for comprehensive utilization of nickel-containing ores, which not only solves the problems of large investment, large environmental pollution, and large amount of slag in the prior art, but also realizes sulfuric acid and nonferrous metal smelting enterprises. Recycling of quartz sand

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  • A method for comprehensive utilization of nickel-containing ore
  • A method for comprehensive utilization of nickel-containing ore

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Effect test

Embodiment 1

[0032] The raw material is laterite nickel ore, which is separated into high-nickel and high-iron limonite and high-silicon and low-iron silicon-magnesium-nickel ore. Tiestone (Ni,Mg) 3 Si 4 o 10 (OH) 8 . The specific separation operation of laterite nickel ore is as follows:

[0033] The lateritic nickel ore with a particle size greater than 40mm enters the three-stage one closed-circuit crushing process, and after crushing and screening, it is made into finished products of +0.5mm ~ 10mm and pulp of -0.5mm. The laterite nickel ore and pulp with a particle size of less than 40mm are divided into -0.5mm pulp, +0.5mm~10mm ore and +10mm ore after tank washing, +10mm ore enters the closed-circuit crushing process, and -0.5mm pulp enters the thickener to concentrate and concentrate to High nickel and high iron iron ore, +0.5mm ~ 10mm ore is nickel-containing ore (silicon-magnesium-nickel ore). Its composition is as follows table 1:

[0034] Table 1 Grades of elements before...

Embodiment 2

[0045] (1) Ore pretreatment: Crushing and screening the nickel-containing ore as the raw material into ore sand with a particle size of 0.63-5 mm;

[0046] (2) Sulfuric acid leaching: add water to the ore obtained in step (1) to adjust the slurry to a pulp concentration of 20wt%, then add hydrochloric acid solution and hydrofluoric acid solution to mix until the acidity is 2%, and carry out heap leaching and leaching for 15 to 300 days. Then carry out solid-liquid separation to obtain leaching solution and solid; this step makes nickel, cobalt, manganese, iron, aluminum, chromium and other metals (hydroxides, oxides) in the nickel-containing ore enter the leaching solution by adding sulfuric acid to form sulfate; The silica in the nickel-containing ore does not participate in the acid-base reaction and is completely retained in the solid for the production of quartz sand;

[0047] (3) Direct nickel precipitation: Add sodium hydroxide to the leaching solution obtained in step (...

Embodiment 3

[0051] (1) Ore pretreatment: Crushing and screening the nickel-containing ore as the raw material into ore sand with a particle size of 0.63-5 mm;

[0052] (2) Sulfuric acid leaching: Add water to the ore obtained in step (1) to adjust the slurry to a pulp concentration of 50wt%, then add sulfuric acid solution and hydrochloric acid solution, which are by-products of non-ferrous metal smelters, and mix until the acidity is 70%, and perform soaking and leaching 10 to 1000 hours, and then carry out solid-liquid separation to obtain leaching liquid and solid; this step makes nickel, cobalt, manganese, iron, aluminum, chromium and other metals (hydroxides, oxides) in nickel-containing ores form sulfuric acid by adding sulfuric acid The salt enters the leaching solution; while the silica in the nickel-containing ore does not participate in the acid-base reaction and is completely retained in the solid for the production of quartz sand;

[0053] (3) Direct nickel precipitation: add ...

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Abstract

The invention discloses a method for comprehensively utilizing nickel-contained ores. The method finally realizes comprehensive utilization of the nickel-contained ores by ore pretreatment, sulfuric acid leaching, direct nickel sinking or impurity removal and magnesium sinking, magnesium recovery and quartz sand recovery. With an eye to all-element utilization of the nickel-contained ore resources, all elements of silicon, magnesium, iron and nickel in the nickel-contained ores are recovered and utilized to focus on circular matching with nonferrous metal smelting enterprises; on the one hand, the method absorbs sulfuric acid of the nonferrous metal smelting enterprises; and meanwhile, quartz sand produced by the project is returned to the nonferrous metal smelting enterprises to realize the purpose of resource recycling. The method forms such series as ore pretreatment, manufactured sand gradation, serial quartz sand product development, salt recovery and water treatment, nickel, iron and magnesium recovery, and system acid and water balance. The method is high in resource utilization rate, low in cost and investment, free of industrial three-waste emission and environmental pollution, simple and clean in whole process, and environment-friendly.

Description

technical field [0001] The invention relates to a method for comprehensive utilization of nickel-containing ore, which belongs to the technical field of metallurgy. Background technique [0002] At present, there are two main treatment processes for nickel-containing ores (such as laterite nickel ore, silicon-magnesium-nickel ore): (1) Wet method. The wet method is divided into sulfuric acid method and ammonia method. The former mainly uses sulfuric acid as the leaching agent, and the latter uses ammonia or ammonia salt as the leaching agent. Among them, the ammonia method is rarely used because of environmental protection issues; the sulfuric acid method produces leachate and solids after leaching with sulfuric acid, and the solids are difficult to reuse. , and the leaching solution is electrolyzed to produce electrolytic nickel after extraction, and the solid slag produced by electrolysis contains heavy metal pollutants, which are also dangerous solid wastes and will caus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/08C22B3/44C22B23/00C22B26/22
CPCC22B3/08C22B3/44C22B23/043C22B23/0461C22B26/22Y02P10/20
Inventor 曹国华
Owner 广西赛可昱新材料科技有限公司
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