CN104630463A - Method for extracting nickel and cobalt from leaching solution obtained by normal-pressure acid leaching of laterite-nickel ore - Google Patents
Method for extracting nickel and cobalt from leaching solution obtained by normal-pressure acid leaching of laterite-nickel ore Download PDFInfo
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- CN104630463A CN104630463A CN201410845499.6A CN201410845499A CN104630463A CN 104630463 A CN104630463 A CN 104630463A CN 201410845499 A CN201410845499 A CN 201410845499A CN 104630463 A CN104630463 A CN 104630463A
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Abstract
The invention discloses a method for extracting nickel and cobalt from a leaching solution obtained by normal-pressure acid leaching of laterite-nickel ore, and relates to a wet smelting treatment process of laterite-nickel ore. The method comprises the following steps: a) dissolving ore slurry of the laterite-nickel ore; b) adding a neutralizer into a normal-pressure leaching solution; c) performing solid-liquid separation on substances obtained by the operation in the step b); d) adding the neutralizer into a solution obtained by the operation in the step c); e) performing solid-liquid separation on the substances obtained by the operation in the step d); and f) slowly adding the neutralizer into the solution obtained by the operation in the step e) to perform neutralization, hydrolysis and precipitation.
Description
Technical field
The present invention relates to the hydrometallurgy treatment process of red soil nickel ore, be specifically related to a kind of method extracting nickel cobalt from the leach liquor of normal pressure acidleach red soil nickel ore.
Background technology
Proress Technolgies of Laterite-nickel Ore mainly contains thermal process and wet processing, and in wet processing, acidleach operation is comparatively common a kind of processing mode.It is exactly comparatively typically high pressure pickling process, the flow process of the method is: under high-temperature and high-pressure conditions, with dilute sulphuric acid, the valuable metal such as nickel, cobalt is dissolved together with iron, aluminium mineral, and control the leaching conditions such as certain pH value, make the impurity element hydrolysis such as iron, aluminium and silicon enter in slag, nickel, cobalt then optionally enter solution.The key that technique adopts is that produced a large amount of ferric sulfate and a small amount of Tai-Ace S 150, chromium sulphate etc. hydrolysis reaction can occur under high temperature and high pressure environment, generates corresponding oxide compound and acid.Wherein Fe
2o
3even if precipitation is also difficult to dissolve in high temperature, subacid solution, nickel and cobalt then stay in the solution, and employing solid-liquid separation finally reaches the object that iron is originally separated with nickel cobalt-based after cooling.High pressure pickling process is high to equipment requirements, and various kinds of equipment needs often to safeguard, maintenance cost is high.Restriction for above-mentioned reasons, up to the present high pressure acid leaching process does not obtain extensive widespread use.Compare high pressure acid leaching process, normal pressure pickling process have that technique is simple, energy consumption is low, pollute less, applied widely, simple operation and other advantages.But normal pressure acid leaching process leaching yield is not high, in leach liquor foreign matter content high, not easily remove.Usually in the leach liquor of normal pressure acidleach, be rich in nickel, cobalt, iron, exist with the form of vitriol, wherein the content of ferric sulfate is very high.General employing neutralizing experiment removes ferric sulfate, and neutralizing experiment is that regulator solution pH value makes Fe
3+ form precipitation of hydroxide, refilter removing, the Fe (OH) formed
3colloid not only not easily filters, and the valuable metal ions in easy adsorbent solution, reduces the rate of recovery of nickel, cobalt.
Summary of the invention
Object of the present invention provides can a kind of method extracting nickel cobalt from the leach liquor of normal pressure acidleach red soil nickel ore of efficient recovery iron.
Following technical scheme is the invention provides: a kind of method extracting nickel cobalt from the leach liquor of normal pressure acidleach red soil nickel ore, described method comprises the steps: for solving the problem
From the leach liquor of normal pressure acidleach red soil nickel ore, extract a method for nickel cobalt, described method comprises the steps:
A) with acidic solution, red soil nickel ore ore pulp is dissolved, after solid-liquid separation, obtain normal pressure leaching liquid;
B) in normal pressure leaching liquid, add neutralizing agent, temperature of reaction remains on 85 DEG C-105 DEG C, finally makes solution Ph remain on value between 1.5-2.0.
C) material is obtained to b step operation and carry out solid-liquid separation, obtain solution and sodium jarosite solid.
D) obtain adding in solution during neutralizing agent carries out to step c operation, carry out neutralizing hydrolysis precipitation, pH value is remained between 4.0-5.0.
E) Step d operation is obtained to material and carries out solid-liquid separation, obtain precipitation of hydroxide and be rich in the pregnant solution of nickel.
F) obtain in solution, slowly adding neutralizing agent to step e operation and carry out neutralizing hydrolysis precipitation, pH is remained between 6.5-7.0.
The neutralizing agent that b step adds is milk of magnesia.
The neutralizing agent that Step d adds is sodium hydrogen carbonate solution.
The neutralizing agent that step e adds is sodium hydroxide solution.
Beneficial effect of the present invention is: carry out yellow modumite method deironing to the normal pressure leaching liquid of red soil nickel ore at ambient pressure, and by filtering, filter residue is mainly iron vitriol dreg of yellow sodium, and gained iron vitriol dreg of yellow sodium carries out drying, Roasting Decomposition, and gas is SO
3, can obtain being rich in Fe after solid washing
2o
3iron ore concentrate, iron ore concentrate can be used as product sell, sour gas SO
3acid making system remanufacture sulfuric acid can be entered.Neutralizing agent is added in solution after deironing, through neutralizing hydrolysis removal of impurities, as Fe, Al, Cr etc., obtain nickel cobalt pregnant solution, add alkali carrying out hydrolyzing and precipitating nickel cobalt, after solid-liquid separation, gained solid is mainly nickel hydroxide and cobaltous hydroxide, in order to obtain purer nickel hydroxide cobalt product, adding neutralizing agent regulator solution final ph controls below 8.0, in tail washings, contained a small amount of nickel cobalt carries out efficient recovery by ion exchange resin, obtain the solution being rich in single nickel salt, the heavy metal ion in tail washings reaches emission standard.Finally improve the comprehensive recovery of nickel cobalt, reach the object of comprehensive utilization of resources, solve the high pressure acidleach quantity of slag huge, the difficult problem that environmental pollution is serious.
Accompanying drawing explanation
Fig. 1 is present invention process schema.
Embodiment
Below in conjunction with embodiment, the present invention will be further described.The normal pressure leaching liquid main component of this time experiment red soil nickel ore acidleach used is as follows.
Embodiment 1
From the leach liquor of normal pressure acidleach red soil nickel ore, extract a method for nickel cobalt, described method comprises the steps:
A) with acidic solution, red soil nickel ore ore pulp is dissolved, after solid-liquid separation, obtain normal pressure leaching liquid;
B) in normal pressure leaching liquid, add milk of magnesia neutralizing agent, temperature of reaction remains on 85 DEG C, finally makes solution Ph remain on value 1.5.
C) material is obtained to b step operation and carry out solid-liquid separation, obtain solution and sodium jarosite solid.
D) obtain adding in solution during sodium hydrogen carbonate solution neutralizing agent carries out to step c operation, carry out neutralizing hydrolysis precipitation, make pH value remain on 4.0.
E) Step d operation is obtained to material and carries out solid-liquid separation, obtain precipitation of hydroxide and be rich in the pregnant solution of nickel.
F) obtain slowly adding sodium hydroxide solution neutralizing agent in solution to step e operation and carry out neutralizing hydrolysis precipitation, make pH remain on 6.5, solid-liquid separation is precipitated, and precipitate component is in Table 1-1, and solution composition is in Table 1-2.
Embodiment 2
From the leach liquor of normal pressure acidleach red soil nickel ore, extract a method for nickel cobalt, described method comprises the steps:
A) with acidic solution, red soil nickel ore ore pulp is dissolved, after solid-liquid separation, obtain normal pressure leaching liquid;
B) in normal pressure leaching liquid, add milk of magnesia neutralizing agent, temperature of reaction remains on 105 DEG C, finally makes solution Ph remain on value 2.0.
C) material is obtained to b step operation and carry out solid-liquid separation, obtain solution and sodium jarosite solid.
D) obtain adding in solution during sodium hydrogen carbonate solution neutralizing agent carries out to step c operation, carry out neutralizing hydrolysis precipitation, make pH value remain on 5.0.
E) Step d operation is obtained to material and carries out solid-liquid separation, obtain precipitation of hydroxide and be rich in the pregnant solution of nickel.
F) obtain slowly adding sodium hydroxide solution neutralizing agent in solution to step e operation and carry out neutralizing hydrolysis precipitation, make pH remain on 7.0, solid-liquid separation is precipitated, and precipitate component is in Table 2-1, and solution composition is in Table 2-2.
Claims (4)
1. from the leach liquor of normal pressure acidleach red soil nickel ore, extract a method for nickel cobalt, described method comprises the steps:
A) with acidic solution, red soil nickel ore ore pulp is dissolved, after solid-liquid separation, obtain normal pressure leaching liquid;
B) in normal pressure leaching liquid, add neutralizing agent, temperature of reaction remains on 85 DEG C-105 DEG C, finally makes solution Ph remain on value between 1.5-2.0;
C) material is obtained to b step operation and carry out solid-liquid separation, obtain solution and sodium jarosite solid;
D) obtain adding in solution during neutralizing agent carries out to step c operation, carry out neutralizing hydrolysis precipitation, make pH value remain between 4.0-5.0;
E) Step d operation is obtained to material and carries out solid-liquid separation, obtain precipitation of hydroxide and be rich in the pregnant solution of nickel;
F) obtain in solution, slowly adding neutralizing agent to step e operation and carry out neutralizing hydrolysis precipitation, pH is remained between 6.5-7.0.
2. a kind of method extracting nickel cobalt from the leach liquor of normal pressure acidleach red soil nickel ore according to claim 1, is characterized in that: the neutralizing agent that described b step adds is milk of magnesia.
3. a kind of method extracting nickel cobalt from the leach liquor of normal pressure acidleach red soil nickel ore according to claim 1, is characterized in that: the neutralizing agent that described Step d adds is sodium hydrogen carbonate solution.
4. a kind of method extracting nickel cobalt from the leach liquor of normal pressure acidleach red soil nickel ore according to claim 1, is characterized in that: the neutralizing agent that described step e adds is sodium hydroxide solution.
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| CN201410845499.6A CN104630463A (en) | 2014-12-31 | 2014-12-31 | Method for extracting nickel and cobalt from leaching solution obtained by normal-pressure acid leaching of laterite-nickel ore |
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Cited By (6)
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| CN107130109A (en) * | 2017-06-09 | 2017-09-05 | 金川集团股份有限公司 | Suppress the method for impurity element during a kind of laterite pressure leaching |
| CN108517407A (en) * | 2018-05-22 | 2018-09-11 | 广西银亿新材料有限公司 | A kind of method for removing iron of red soil nickel ore leaching liquid |
| CN109881026A (en) * | 2019-02-19 | 2019-06-14 | 北京中科康仑环境科技研究院有限公司 | A method of iron and nickel are separated and extracted from iron, nickel leachate |
| CN111004926A (en) * | 2018-10-08 | 2020-04-14 | 金川集团股份有限公司 | Method for extracting nickel and cobalt from low-grade laterite-nickel ore leaching solution by resin |
| CN112708780A (en) * | 2020-12-09 | 2021-04-27 | 金川集团股份有限公司 | Method for removing aluminum from nickel-cobalt solution |
| CN114427037A (en) * | 2022-01-06 | 2022-05-03 | 中国恩菲工程技术有限公司 | Method for continuously enriching nickel and cobalt from low-concentration nickel and cobalt solution |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107130109A (en) * | 2017-06-09 | 2017-09-05 | 金川集团股份有限公司 | Suppress the method for impurity element during a kind of laterite pressure leaching |
| CN108517407A (en) * | 2018-05-22 | 2018-09-11 | 广西银亿新材料有限公司 | A kind of method for removing iron of red soil nickel ore leaching liquid |
| CN111004926A (en) * | 2018-10-08 | 2020-04-14 | 金川集团股份有限公司 | Method for extracting nickel and cobalt from low-grade laterite-nickel ore leaching solution by resin |
| CN109881026A (en) * | 2019-02-19 | 2019-06-14 | 北京中科康仑环境科技研究院有限公司 | A method of iron and nickel are separated and extracted from iron, nickel leachate |
| CN112708780A (en) * | 2020-12-09 | 2021-04-27 | 金川集团股份有限公司 | Method for removing aluminum from nickel-cobalt solution |
| CN112708780B (en) * | 2020-12-09 | 2022-09-02 | 金川集团股份有限公司 | Method for removing aluminum from nickel-cobalt solution |
| CN114427037A (en) * | 2022-01-06 | 2022-05-03 | 中国恩菲工程技术有限公司 | Method for continuously enriching nickel and cobalt from low-concentration nickel and cobalt solution |
| CN114427037B (en) * | 2022-01-06 | 2023-09-29 | 中国恩菲工程技术有限公司 | Method for continuously enriching nickel and cobalt from low-concentration nickel and cobalt solution |
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Inventor after: Chen Xuean Inventor after: Sha Bin Inventor after: Wang Xiaochan Inventor after: Ma Yonggang Inventor after: Yao Fei Inventor after: Wang Shaohua Inventor after: Liu Yuqiang Inventor after: Liu Shihe Inventor after: Wang Yuanpu Inventor after: Du Hao Inventor after: Sun Zhizhong Inventor after: Li Weizhou Inventor after: Liu Ke Inventor after: Tian Zhongyuan Inventor before: Chen Xuean Inventor before: Wang Shaohua Inventor before: Liu Yuqiang Inventor before: Liu Shihe Inventor before: Yuan Hong Inventor before: Du Hao Inventor before: Sun Zhizhong Inventor before: Sha Bin Inventor before: Wang Xiaochan Inventor before: Ma Yonggang |
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Application publication date: 20150520 |
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