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Iron-like concentrate and its preparation method

An iron concentrate and iron technology, applied in the field of metallurgy, can solve problems such as polluting the environment and occupying land, and achieve the effects of low sulfur content, increase enterprise income, and reduce potential pollution

Active Publication Date: 2016-01-27
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, on the one hand, the cost of iron precipitation from nickel-containing ore is greatly reduced, and the waste of resources is reduced; on the other hand, the problems of land occupation and environmental pollution by waste slag generated in smelting nickel ore are solved

Method used

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  • Iron-like concentrate and its preparation method
  • Iron-like concentrate and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Embodiment 1 Discontinuous test of iron precipitation from nickel-containing residual ore leaching solution

[0066] Use a 3L glass beaker, electric heating to maintain the temperature in the leach solution of nickel-containing residual ore at 95-105°C, and a mechanical stirring speed of 250rpm. Use magnesium hydroxide slurry to adjust the pH value of the leach solution to 1.3. During the reaction, use a pH meter to monitor in real time. After 6 hours, 85-95% Fe in the leaching solution precipitated, of which the nickel content was 0.15%, and the iron slag contained about 54%.

Embodiment 2

[0067] Example 2 Continuous test of iron precipitation from nickel-containing residual ore leaching solution

[0068] Use four 3L beakers in series to form a reaction vessel, mechanically stir, and electric heating to maintain the reaction temperature at 100-105°C, install a pH meter on the second and fourth beakers to monitor the acidity of the leachate, and maintain the pH value of the leachate at 1.3-2.0, one 5L clarifier device.

[0069] Add nickel-containing residual ore leaching solution (700ml / h) and magnesium hydroxide slurry to the first reactor at the same time by quantitative pump, the clarifier supernatant contains Fe2-3g / l, the bottom flow contains 55% iron and 3.0-2.5% sulfur, and filter After alkali washing, hematite-like ore with a sulfur content of 1.0-1.5% is produced.

Embodiment 3

[0071] At normal pressure and at a temperature of 95 to 100 degrees Celsius, sulfuric acid is used to leach iron ore to obtain a leaching solution containing ferric sulfate (the iron content in the leaching slurry is about 40g / l (Fe 2+ 2 63%) and filtrate. Under the conditions of normal pressure, temperature 95-100°C and mechanical stirring speed of 250rpm, use magnesia ore (containing Mg18-20%) to neutralize Fe in the obtained filtrate 3+ For the acid generated by the hydrolysis reaction, the concentration of free acid in the filtration solution is reduced from 40-45g / l to 4.5-5g / l. At the same time, valuable components such as nickel and cobalt in the magnesia ore are dissolved by acid, and when the pH value drops to 1.5-2.0, iron removal from the leaching solution can be realized. Filter the mixed solution neutralized with magnesia ore, and add magnesium hydroxide slurry to the filtrate to neutralize the sulfuric acid precipitated during iron precipitation. During the reac...

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Abstract

The invention discloses an iron-like concentrate and a preparation method thereof. The method comprises the steps of dividing nickel-containing residual ore into magnesia ore and ferrite ore; performing leaching treatment on the ferrite ore by utilizing sulfuric acid at the temperature of 95-100 DEG C to obtain a leaching solution containing ferric sulfate; filtering the leaching solution containing the ferric sulfate to obtain first high-silicon filter residue and first filtrate; performing first neutralization treatment on the first filtrate by utilizing the magnesia ore; filtering the first filtrate after the first neutralization treatment so as to produce second high-silicon filter residue and second filtrate; performing second neutralization treatment on the second filtrate by utilizing an alkaline neutralizing reagent at the temperature of 95-105 DEG C, filtering and washing to obtain a precipitate containing iron compounds; performing alkaline washing on the iron compounds by utilizing an alkaline reagent at the temperature of 85-90 DEG C, and then drying to obtain a hematite-like concentrate and a solution containing nickel and cobalt. Through the method, valuable metals in the nickel-containing residual ore can be effectively recovered.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for preparing iron-like concentrate from nickel-containing residual ore sulfuric acid leaching solution. Background technique [0002] Iron precipitation methods from solutions containing ferric sulfate (including ferrous sulfate) mainly include the ferrite method, goethite method, secondary goethite method and hematite method, which are all used in zinc smelting. Japan's Akita Zinc Company uses hematite precipitated iron. The operating conditions are 195-200 ° C, oxygen partial pressure is 150-250 kPa, and the reaction time is 3 hours. The hematite contains 56.3% Fe, 3.9% S and 0.33% Zn. . The product can be used in the iron or cement industry to eliminate the problem of iron slag accumulation. [0003] In view of the high operating temperature and high pressure of this method, and the limitations in equipment manufacturing, maintenance, production management, etc., it is ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/08C22B3/44
CPCY02P10/20
Inventor 陆业大殷书岩时炜郑明臻戴江洪傅建国孙宁磊王魁珽
Owner CHINA ENFI ENGINEERING CORPORATION
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