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Extraction method of valuable metals for copper nickel sulfide minerals

A valuable metal and extraction method technology, applied in the field of non-ferrous metal metallurgy, can solve the problems of low efficiency, high energy consumption, high content of alkaline gangue, and achieve the effects of wide application range, low roasting temperature and cost reduction

Active Publication Date: 2019-03-08
东北大学秦皇岛分校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low metal recovery rate and high energy consumption restrict the development and application of this technology to a certain extent.
[0006] In terms of hydrometallurgy, the mixed acid system of nitric acid and sulfuric acid, ammonia-ammonium salt system, and bioleaching of low-grade copper-nickel sulfide ores have been mainly studied to extract metals. The recovery rate of metals in acid leaching and bioleaching processes is relatively high, but alkaline gangue High content, resulting in large acid consumption and high cost; low metal recovery rate and low efficiency in ammonia leaching process

Method used

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  • Extraction method of valuable metals for copper nickel sulfide minerals
  • Extraction method of valuable metals for copper nickel sulfide minerals
  • Extraction method of valuable metals for copper nickel sulfide minerals

Examples

Experimental program
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Effect test

Embodiment 1

[0053] A method for extracting valuable metals in copper-nickel sulfide minerals, the process flow chart is as follows figure 1 shown, including the following steps:

[0054] 1) The copper-nickel sulfide-type nickel ore is crushed, ground, and sieved to obtain ore powder with a particle size of 75-80 μm. The chemical composition of the copper-nickel sulfide-type nickel ore is shown in Table 4.

[0055] Table 4 Composition and mass percentage of main metal elements of copper-nickel sulfide-type nickel ore

[0056]

[0057] 2) Weigh 20g of nickel ore powder and ammonium chloride, grind and mix evenly according to the mass ratio of 1:2.

[0058] 3) Put the mixed material into a porcelain crucible, cover it and place it in a vertical furnace containing 20% ​​oxygen, raise it to 500°C at a rate of 15°C / min for 2.5 hours to complete the roasting, and cool down with the furnace to obtain roasted clinker .

[0059] 4) The roasted clinker is placed in a shaft furnace containing 4...

Embodiment 2

[0064] A method for extracting valuable metals in copper-nickel sulfide minerals, comprising the steps of:

[0065] 1) The copper-nickel sulfide-type nickel concentrate was crushed, ground, and sieved to obtain ore powder with a particle size of 80-96 μm. The chemical composition of the copper-nickel sulfide-type nickel concentrate is shown in Table 5.

[0066] Table 5 Composition and mass percentage of main metal elements of copper-nickel sulfide-type nickel concentrate

[0067]

[0068] 2) Weigh 20g nickel concentrate ore powder and ammonium chloride according to the mass ratio of 1:2.5, grind and mix evenly.

[0069] 3) Put the mixed material into a porcelain crucible, cover it and place it in a shaft furnace containing 25% oxygen, raise it to 500°C at a constant temperature for 3 hours at a rate of 15°C / min to complete the roasting, and cool down with the furnace to obtain roasted clinker.

[0070] 4) Place the roasted clinker in a shaft furnace containing 30% oxygen, ...

Embodiment 3

[0075] A method for extracting valuable metals in copper-nickel sulfide minerals, comprising the steps of:

[0076] 1) The copper-nickel sulfide-type nickel ore is crushed, ground, and sieved to obtain ore powder with a particle size of 109-120 μm. The chemical composition of the copper-nickel sulfide-type nickel ore is shown in Table 6.

[0077] Table 6 Composition and mass percentage of main metal elements of copper-nickel sulfide-type nickel ore

[0078]

[0079] 2) Weigh 10g of nickel ore powder, grind and mix with ferric chloride hexahydrate according to the mass ratio of 1:1.5.

[0080] 3) Put the mixed material into a porcelain crucible, cover it and place it in a vertical furnace containing 20% ​​oxygen, raise it to 180°C at a rate of 10°C / min for 2.5 hours to complete the roasting, and cool down with the furnace to obtain roasted clinker .

[0081] 4) Place the roasted clinker in a shaft furnace containing 30% oxygen, roast at a temperature of 500° C. for 1 hour,...

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Abstract

The invention provides an extraction method of valuable metals for copper nickel sulfide type minerals and belongs to the field of nonferrous metallurgy. The extraction method comprises the steps thatafter being grinded and then evenly mixed with chloridizing agents according to the certain mass ratio, the copper nickel sulfide minerals are put in a closed shaft furnace, and primary roasting or secondary roasting are conducted under the oxidizing atmosphere; and in the roasting process, gold, silver and platinum group metal chloride are sublimated, are condensed with ammonia gas, chlorine hydride and chlorine which are generated by reaction and then are recycled and enriched, roasted clinkers are leached and filtered through deionized water, and a solution containing valuable metal chloride such as copper, nickel and cobalt is obtained, the extraction ratio of the copper, the nickel and the cobalt are greater than 80%, and the content of iron ions in a secondary roasting leached solution is less than 0.4 mol / L. The extraction method realizes comprehensive extraction of the valuable metals such as the copper, the nickel and the cobalt at the low temperature, the recovery ratio is high, the extraction ratio of iron impurities can be controlled through selective roasting, enrichment of the gold, the silver and platinum group metals is achieved, the process is easy, and energy consumption is low.

Description

Technical field: [0001] The invention belongs to the technical field of nonferrous metal metallurgy, and in particular relates to a method for extracting valuable metals by chlorination roasting-water leaching of copper-nickel sulfide minerals, in particular to a method for extracting valuable metals in copper-nickel sulfide minerals. Background technique: [0002] The world's land-based nickel resources mainly include weathered lateritic nickel ore and magmatic copper-nickel sulfide ore. Due to the good quality of sulfide nickel ore resources and mature technology, it is the main resource for the production of nickel products. In recent years, with the increasing demand for nickel in the world, the mineable high-grade nickel sulfide ore resources are increasingly exhausted. Without the support of new mineral resources, low-grade copper-nickel nickel sulfide nickel ore has become the key development of the nickel industry. object. [0003] Low-grade copper-nickel sulfide o...

Claims

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Application Information

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IPC IPC(8): C22B1/08C22B3/04C22B15/00C22B23/00C22B11/00
CPCC22B1/08C22B3/04C22B11/04C22B15/0065C22B23/0407Y02P10/20
Inventor 牟文宁翟玉春辛海霞滕飞陆修远黄凯峰
Owner 东北大学秦皇岛分校