Clean production method in atmospheric pressure leaching of limonite type laterite-nickel ore with hydrochloric acid

A technology of laterite nickel ore and cleaner production, applied in the field of limonite type laterite nickel ore hydrochloric acid normal pressure leaching clean production, can solve the problems of high iron ion concentration and difficult separation, and achieve the effects of reducing discharge and solving difficult treatment.

Active Publication Date: 2013-06-26
河北中科同创科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to, aim at the high iron ion concentration in the existing limonite-type laterite-nickel ore hydrochloric acid atmospheric pressure leaching solution, and the problem that is difficult to separate with target metal element nickel, cobalt etc., realize the high-concentra...

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0026] The raw material is limonite-type lateritic nickel ore. After grinding, the particle size is controlled below 200 mesh, accounting for more than 85% of the total ore. It is added to the enamel reaction kettle together with hydrochloric acid with a mass percentage concentration of 31% according to the acid ore mass ratio of 2.5:1. Mix and heat up, and start timing the reaction when the temperature reaches 100°C. After the reaction is finished, plate and frame filter press is carried out, and the main element composition in the pickling solution is: Fe 2 o 3 : 114.7g / L, Ni: 2.76g / L, Co: 0.24g / L, Cr: 3.09g / L, Al: 7.98g / L, Mg: 3.93g / L. The pickling solution is pumped into the calcining hydrolysis furnace at a flow rate of 100L / h by a metering pump, and after being atomized, the calcining reaction is carried out at 300°C. The hydrogen chloride gas generated by the reaction enters the two-stage packing absorption tower after two-stage dust removal by cyclone dust removal an...

Embodiment 2

[0028] The raw material is limonite-type lateritic nickel ore. After grinding, the particle size is controlled below 200 mesh, accounting for more than 85% of the total ore. It is added to the enamel reaction kettle together with hydrochloric acid with a mass percentage concentration of 22% according to the acid ore mass ratio of 4:1. Mix and heat up, and start timing the reaction when the temperature reaches 80°C. After the reaction is finished, plate and frame filter press is carried out, and the main element composition in the pickling solution is: Fe 2 o 3 : 120.6g / L, Ni: 3.07g / L, Co: 0.33g / L, Cr: 4.11g / L, Al: 8.02g / L, Mg: 2.97g / L. The pickling liquid is pumped into the calcining hydrolysis furnace at a flow rate of 50L / h by a metering pump, and after being atomized, the calcining reaction is carried out at 500°C. The hydrogen chloride gas generated by the reaction enters the two-stage packing absorption tower after two-stage dust removal by cyclone dust removal and bag ...

Embodiment 3

[0030] The raw material is limonite-type lateritic nickel ore. After grinding, the particle size is controlled below 200 mesh, accounting for more than 85% of the total ore. It is added to the enamel reaction kettle together with hydrochloric acid with a mass percentage concentration of 18% according to the acid ore mass ratio of 5:1. Mixing was performed, the temperature was raised, and the reaction was timed when the temperature reached 50°C. After the reaction is finished, plate and frame filter press is carried out, and the main element composition in the pickling solution is: Fe 2 o 3 : 119.3g / L, Ni: 3.55g / L, Co: 0.36g / L, Cr: 4.35g / L, Al: 8.56g / L, Mg: 3.05g / L. The pickling solution is poured into the calcining hydrolysis furnace with a metering pump at a flow rate of 1000L / h, and after being atomized, the calcining reaction is carried out at 300°C. The hydrogen chloride gas generated by the reaction enters the two-stage packing absorption tower after being dedusted by c...

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PUM

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Abstract

The invention relates to a clean production method in atmospheric pressure leaching of limonite type laterite-nickel ore with hydrochloric acid. The clean production method comprises the following steps: 1) mixing the limonite type laterite-nickel ore with hydrochloric acid for performing atmospheric pressuring leaching reaction; 2) performing calcination reaction to the pickle liquor obtained from the step 1); 3) dedusting the hydrogen chloride gas obtained from the step 2) to enter an absorption tower for producing hydrochloric acid, and collecting iron oxide powder; 4) washing and filtering the iron oxide powder, obtained from the step 3) with clean water; 5) performing liquid oxidizing reaction to solid filter cakes obtained from the step 4) to prepare corresponding chromium products, wherein the fine iron powder is obtained by slag phase; and 6) preparing the acid filtrate obtained from the step 4) into Ni and Co products. Through the clean production method, the separation of iron from nickel, cobalt and chrome in the atmospheric pressure leachate of the limonite type laterite-nickel ore can be realized, and the problem that the atmospheric pressure leachate of the limonite type laterite-nickel ore is difficultly treated can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metal metallurgy. Specifically, the invention relates to a clean production method of limonite-type laterite-nickel ore hydrochloric acid leaching with hydrochloric acid, which realizes the separation and comprehensive utilization of iron, nickel, cobalt and chromium. Background technique [0002] The world's land-based nickel reserves are about 470 million tons, of which 39.4% exist in the form of sulfide ore, and 60.6% exist in the form of oxide ore. At present, 60% to 65% of the world's nickel production comes from sulfide ore. With the depletion of high-grade nickel-containing sulfide ore resources and the increasing demand for nickel in social development, it is necessary to develop and utilize laterite nickel ore efficiently and at low cost. is of great significance. [0003] For the treatment of limonite-type lateritic nickel ore, the hydrometallurgical process is currently the main me...

Claims

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Application Information

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IPC IPC(8): C22B3/10C22B23/00
CPCY02P10/20
Inventor 曲景奎郭强齐涛宋云霞张培育时美玲
Owner 河北中科同创科技发展有限公司
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