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Method for recovering nickel and cobalt through leaching laterite-nickel ore by using sulfuric and hydrochloric acid containing mixed waste acid

A technology of laterite nickel ore containing sulfuric acid, applied in the direction of improving process efficiency, etc., can solve the problems of high processing cost, difficult utilization, low production cost, etc., and achieve the effect of simple process path, low energy consumption and low production cost

Inactive Publication Date: 2014-05-07
江苏仁欣化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the difficulties in the treatment and utilization of mixed waste acids containing sulfuric acid and hydrochloric acid in the chemical industry, and the high cost of the existing laterite nickel ore wet treatment, the present invention provides a nickel-cobalt recovery method with small investment, simple process, low energy consumption, and low production cost. Method for recovering nickel and cobalt by combining leaching laterite nickel ore with mixed waste acid containing sulfuric acid and hydrochloric acid in chemical industry with high efficiency

Method used

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  • Method for recovering nickel and cobalt through leaching laterite-nickel ore by using sulfuric and hydrochloric acid containing mixed waste acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Stirring and leaching of mixed waste acid containing sulfuric acid and hydrochloric acid

[0021] Laterite nickel ore crushing, grinding to below 0.15mm, using a filter area of ​​8m 2 Plate and frame filter press press filter into filter cake, prepare 400kg (50% moisture, 200kg dry ore). Its chemical composition is shown in the table below.

[0022] Chemical composition of laterite nickel ore

[0023] Ni%

Fe%

Mg%

Co%

1.4

13.8

12.2

0.10

[0024] 400kg mixed waste acid containing sulfuric acid and hydrochloric acid, H 2 SO 4 The content is 50%, the mass fraction of HCl is 10%, add to 2m 3 In the stirring tank, add the prepared 400kg laterite nickel ore (liquid-solid ratio 3:1) under the condition of stirring, heat to the temperature of 80, ℃ stirring and leaching for 6h, after the leaching is completed, use a filter area of ​​8m 2 Filter with a plate and frame filter press, add 110 kg of water directly to the filter ...

Embodiment 2

[0042] 1. Stirring and leaching of mixed waste acid containing sulfuric acid and hydrochloric acid

[0043] Laterite nickel ore crushing, grinding to below 0.15mm, using a filter area of ​​100m 2 The plate and frame filter press is used to filter into filter cakes, and 4 tons are prepared (moisture content is 50%, containing 2 tons of dry ore). Its chemical composition is shown in the table below.

[0044] Chemical composition of laterite nickel ore

[0045] Ni%

Fe%

Mg%

Co%

1.2

8.0

14.4

0.05

[0046] Mixed waste acid containing sulfuric acid and hydrochloric acid 6t, H 2 SO 4 The content is 10%, the mass fraction of HCl is 30%, add to 12m 3 In the stirring tank (liquid-solid ratio 5:1), add the prepared 4t laterite nickel ore under the condition of stirring, heat to the temperature of 60, ℃ stirring and leaching for 3 hours, after the leaching is completed, use a filter area of ​​100m 2 Filter with plate and frame filter pre...

Embodiment 3

[0064] 1. Stirring and leaching of mixed waste acid containing sulfuric acid and hydrochloric acid

[0065] Laterite nickel ore crushing, grinding to below 0.15mm, using a filter area of ​​100m 2 The plate and frame filter press is used to filter into filter cakes, and 4 tons are prepared (moisture content is 50%, containing 2 tons of dry ore). Its chemical composition is shown in the table below.

[0066] Chemical composition of laterite nickel ore

[0067] Ni%

Fe%

Mg%

Co%

1.3

10.0

11.2

0.05

[0068] Mixed waste acid containing sulfuric acid and hydrochloric acid 6t, H 2 SO 4 The content is 30%, the mass fraction of HCl is 20%, add to 12m 3 In the stirring tank (liquid-solid ratio 4:1), add the prepared 4t laterite nickel ore under the condition of stirring, heat to the temperature of 70°C, stir and leaching for 4.5h, after the leaching is completed, use a filter area of ​​100m 2 Filter with plate and frame filter press, ad...

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Abstract

The invention discloses a method for recovering nickel and cobalt through leaching laterite-nickel ore by using sulfuric and hydrochloric acid containing mixed waste acid. The method comprises the processes of carrying out stirred leaching on sulfuric and hydrochloric acid containing mixed waste acid, de-ironing a leachate and precipitating nickel and cobalt. According to the method, sulfuric and hydrochloric acid containing mixed waste acid generated during chemical industry production can be treated, meanwhile, the comprehensive utilization of sulfuric and hydrochloric acid containing mixed waste acid is realized, the waste is changed into the valuable, the laterite-nickel ore is leached, nickel and cobalt are recovered simultaneously, the recovery ratio of nickel and cobalt is high, the production scale can be large and small, and the range of used sulfuric and hydrochloric acid containing mixed waste acid is large; the method disclosed by the invention has the characteristics of simple process path, small investment, low energy consumption, low operating cost, no environmental pollution, comprehensive utilization in sulfuric and hydrochloric acid containing mixed waste acid, simplicity and convenience in operation, low production cost and the like, so that an extremely effective, economical and applicable way for the treatment and comprehensive utilization of sulfuric and hydrochloric acid containing mixed waste acid and the recovery of nickel and cobalt through laterite-nickel ore leaching is provided.

Description

technical field [0001] The invention relates to a method for leaching laterite nickel ore to recover nickel and cobalt with mixed waste acid containing sulfuric acid and hydrochloric acid, especially a method for comprehensive utilization of mixed waste acid containing low concentration hydrochloric acid and sulfuric acid, and leaching laterite nickel ore for recovery of nickel and cobalt, which belongs to resource recovery and utilization field. Background technique [0002] The mixed waste acid containing sulfuric acid and hydrochloric acid produced in the chemical industry contains organic impurities, sulfuric acid and hydrochloric acid at the same time, requires high regeneration equipment, high operating costs, and is difficult to reuse directly. Lime treatment of mixed waste acids containing sulfuric acid and hydrochloric acid requires a large amount of lime consumption and produces a large amount of solid waste and wastewater, which is costly and unsustainable. [00...

Claims

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Application Information

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IPC IPC(8): C22B3/06C22B3/44C22B23/00
CPCY02P10/20
Inventor 钱光友江山隋聚勇王泽强武桥德
Owner 江苏仁欣化工股份有限公司
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