Method for comprehensive recovery of valuable metals in brown iron type laterite-nickel ores

A technology of laterite nickel ore and valuable metals, applied in chemical instruments and methods, improvement of process efficiency, filtration and screening, etc., can solve problems such as harsh process conditions, low comprehensive recycling rate of valuable metals, and high production costs

Inactive Publication Date: 2013-01-02
BEIJING GENERAL RES INST OF MINING & METALLURGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In summary, the above-mentioned processes either have disadvantages such as high production costs and harsh process conditions, or have shortcomings such as low comprehensive recovery and utilization rates of valuable metals, and have not been able to comprehensively utilize limonite-type lateritic nickel ore.

Method used

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  • Method for comprehensive recovery of valuable metals in brown iron type laterite-nickel ores

Examples

Experimental program
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Effect test

Embodiment 1

[0042] See attached figure 1 . The raw ore was stirred and pulped for 48 hours with a slurry concentration of 35%, and then sieved with 30 mesh and 150 mesh screens respectively. The obtained 1# ore was reduced and roasted in a CO atmosphere at 750°C for 0.5 hours, and the calcination was carried out in an ammonium bicarbonate solution. Atmospheric pressure leaching, the leaching slag contains 62% iron, and the ammonia in the leaching solution is recovered after the nickel-cobalt product preparation process and returned to the normal pressure ammonia leaching process; the obtained 2# ore is mixed with 98% concentrated sulfuric acid 200kg / t-mine Acid hydrolysis, water immersion after acid hydrolysis, leaching slag mixed with 8% lignite, magnetized and roasted at 700°C for 1 hour, magnetic separation of calcined sand under a magnetic field of 150MT to obtain iron powder containing 60% iron and chromium containing 10% Chromium slag, the leaching solution is incorporated into the...

Embodiment 2

[0044] The raw ore was stirred and pulped for 20 hours, the concentration of the pulp was 25%, and then sieved with 50 mesh and 120 mesh screens respectively. The obtained 1# ore was reduced and roasted with coal at 700 ° C for 1 hour, and the calcined sand was placed in an ammonium bicarbonate solution under normal pressure. After leaching, the leaching slag contains 61% iron, and the ammonia in the leaching solution is recovered after the nickel-cobalt product preparation process and returned to the normal pressure ammonia leaching process; the obtained 2# ore is mixed with 98% concentrated sulfuric acid 220kg / t-ore acid hydrolysis After acidolysis, water immersion is carried out, and the leaching slag is mixed with 10% lignite and magnetized and roasted at 750°C for 0.5h. The calcined sand is magnetically separated under a magnetic field of 120MT to obtain iron powder containing 61% iron and chromium containing 10.2%. slag, and the leachate is incorporated into the 3# ore tr...

Embodiment 3

[0046] The raw ore was stirred and pulped for 8 hours with a slurry concentration of 15%, and then sieved and analyzed by 60-mesh and 120-mesh screens respectively. The obtained 1# ore was reduced and roasted with coal at 850°C for 1.5 hours, and the calcined sand was often mixed with ammonium bicarbonate solution. Pressure leaching, the leaching slag contains 60% iron, and the ammonia in the leaching solution is recovered after the nickel-cobalt product preparation process and returned to the normal pressure ammonia leaching process; the obtained 2# ore is mixed with 98% concentrated sulfuric acid 250kg / t-mineral acid After acidolysis, water immersion is carried out, and the leaching slag is mixed with 9% lignite and magnetized and roasted at 730°C for 0.5h. The calcined sand is magnetically separated under a magnetic field of 160MT to obtain iron fine powder containing 61% iron and 10.0% chromium. Chromium slag, the leaching solution is incorporated into the 3# ore treatment ...

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Abstract

The invention discloses a method for comprehensive recovery of valuable metals in brown iron type laterite-nickel ores. The method comprises the following steps: preparing ore pulp from raw brown iron type laterite-nickel ores; then carrying out sieve analysis and separation by using a 30-mesh to 200-mesh screen mesh so as to obtain three nickel ores with different particle sizes; subjecting iron, silicon, magnesium, chromium, cobalt and nickel in the three different nickel ores to different degrees of separation and enrichment according to the physical characteristic of different sizes of mineral particles in the raw ores; and comprehensively recovering the valuable metals consisting of nickel, cobalt, iron and chromium in the ores by using three different but coupling processing processes selected according to different characteristics of the three nickel ores. The invention provides a novel technical idea for abundantly-reserved brown iron type laterite-nickel ores with an unrealized comprehensive economic value.

Description

technical field [0001] The invention relates to a method for smelting limonite-type laterite-nickel ore, in particular to a method for comprehensively recovering valuable metals in limonite-type laterite-nickel ore. Background technique [0002] At present, the metal mining industry has become the basic industry of the national economy and national defense construction. Metal mineral resources are often associated with a variety of valuable metals at the same time, and the low overall utilization level greatly limits the effective use of resources, resulting in extreme resource consumption. Great waste and considerable damage to the environment. [0003] Laterite nickel ore is formed by long-term weathering and metamorphism of iron-containing magnesium silicate minerals. Generally, there are two types of limonite-type laterite-nickel ore and silicon-magnesium-nickel-type laterite-nickel ore. The former has the characteristics of high iron, low nickel, low silicon and magnes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B3/04C22B23/00C22B1/00B07B1/00B07B1/46
CPCY02P10/20
Inventor 王成彦黄良兴王云杨琦尹飞绳广生阮书锋马保中陈永强杨永强揭晓武杨卜张永禄邢鹏郜伟李强杨玮娇居中军刘杰
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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