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Low-cost method for disposing red soil nickel ore

A kind of laterite nickel ore, low-cost technology, applied in the field of nickel ore smelting, can solve the problems of nickel leaching rate of only 90%, long reaction time, difficult leaching, etc. The effect of liquid discharge

Inactive Publication Date: 2010-08-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention with the patent application number 200580026260.5 proposes the method of using normal pressure leaching for limonite and high pressure leaching for saprolite ore, but it can be seen from the examples given in the patent that some iron minerals are leached under normal pressure. Difficult to leaching, so that the leaching rate of nickel is only about 90%; a large amount of magnesium in saprolite still consumes a large amount of acid under high pressure, so that the total acid consumption is still high, about 600kg / t ore; in addition, the required Long reaction time (>6 hours)

Method used

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  • Low-cost method for disposing red soil nickel ore
  • Low-cost method for disposing red soil nickel ore
  • Low-cost method for disposing red soil nickel ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) the ore sample 1 # Put into a stirring tank under normal pressure, add sulfuric acid for leaching for 2 hours according to the acid ore mass ratio of 0.53, and obtain two parts of filtrate a and filter residue b after the obtained pulp is filtered; filtrate a is sent to the recovery process of nickel, cobalt, magnesium and aluminum;

[0028] (2) Carry out magnetic separation to filter residue b, be divided into magnetic part c and non-magnetic part d;

[0029] (3) The magnetic part c is sent into the autoclave, and sulfuric acid is added according to the acid ore mass ratio of 0.55, reacted at 240°C for 1.5h, and the obtained pulp is filtered to obtain the filter residue e and the filtrate f;

[0030] (4) The filter residue e is used for iron recovery, and the filtrate f is returned to step (1).

[0031] After this every time new ore material adds, the sulfuric acid that newly adds is 0.1 to add by acid ore mass ratio; Collect the product that above-mentioned react...

Embodiment 2

[0033] (1) the ore sample 2 # Put into a stirring tank under normal pressure, add sulfuric acid for leaching for 2 hours according to the acid ore mass ratio of 0.58, and obtain two parts of filtrate a and filter residue b after filtering the obtained pulp;

[0034] (2) filtrate a is sent to the recovery process of nickel-cobalt-magnesium-aluminum;

[0035] (3) Carry out magnetic separation to filter residue b, be divided into magnetic part c and non-magnetic part d;

[0036](4) Put the magnetic part c into the autoclave, add sulfuric acid according to the acid ore mass ratio of 0.55, and add a small amount of oxygen to react at 260°C for 1.5h, and filter the obtained pulp to obtain filter residue e and filtrate f;

[0037] (5) The filter residue e is used for iron recovery, and the filtrate f is returned to step (1).

[0038] Thereafter, when new ore materials are added each time, the newly added sulfuric acid is added at a mass ratio of 0.15 to acid ore.

[0039] Collect ...

Embodiment 3

[0041] (1) the ore sample 1 # and sample 3 # Put into the atmospheric pressure stirring tank according to the ratio of 3:1 (mass ratio), add sulfuric acid to leach for 2 hours according to the acid ore mass ratio of 0.4, and obtain the filtrate a and the filter residue b after the obtained pulp is filtered;

[0042] (2) filtrate a is sent to the recovery process of nickel-cobalt-magnesium-aluminum;

[0043] (3) Carry out magnetic separation to filter residue b, be divided into magnetic part c and non-magnetic part d;

[0044] (4) The magnetic part c is sent into an autoclave, and sulfuric acid is added according to the acid ore mass ratio of 0.55, reacted at 220°C for 1.5h, and the obtained pulp is filtered to obtain filter residue e and filtrate f;

[0045] (5) The filter residue e is used for iron recovery, and the filtrate f is returned to step (1).

[0046] Thereafter, sulfuric acid is not added every time a new ore is added.

[0047] Collect the product of above-menti...

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Abstract

The invention relates to a low-cost method for disposing red soil nickel ore, comprising the following steps: leaching the red soil nickel ore from a normal pressure pickling tank; carrying out magnetic separation on the filter residue obtained from the filtered red soil nickel ore, wherein the filtered red soil nickel are divided into a magnetic part and a non-magnetic part. The non-magnetic part can be directly used for deep-processing of silicon product. The magnetic part can be leached at pressure higher than atmospheric pressure, the leached residue can be used as raw material for iron industry, and leachate is recycled to the normal pressure leaching tank to serve as the needed acid materials for atmospheric pressure leaching. The normal pressure leachate can be used to recover nickel, cobalt and magnesium by methods such as solvent extraction, ion exchange and vulcanization precipitation. The method of the invention can be applied to various red soil nickel ores containing Fe and Magnesium, realizes cyclic utilization of acid and comprehensive recovery of nickel, cobalt, iron, silicon, magnesium and other metals and greatly reduces volume and amount of scale buildup of a high pressure autoclave, thus being a low-cost environment-friendly technology for efficiently disposing the red soil nickel ore.

Description

technical field [0001] The invention relates to a nickel ore smelting method, in particular to a hydrometallurgical method for recovering nickel and cobalt from laterite nickel ore. Background technique [0002] Nickel resources are relatively abundant in the world. According to geological origin, nickel deposits are mainly divided into two categories: magmatic nickel sulfide deposits and weathered laterite nickel (nickel oxide) deposits. At present, the world's proven nickel reserves are about 160 million tons, of which nickel sulfide ore accounts for about 30%, and laterite nickel ore accounts for about 70%. Because nickel sulfide ore has the characteristics of high grade, less impurities, easy dressing and smelting, and mature smelting technology, more than 60% of nickel production currently comes from nickel sulfide ore. Although the reserves of laterite nickel ore are large, the ore grade is low, and it is generally difficult to enrich through beneficiation, and most l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B23/00C22B26/22
CPCY02P10/20
Inventor 陈启元刘葵伍博克胡慧萍
Owner CENT SOUTH UNIV
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