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Alkali-acid double-cycle process for treating brown iron type nickel laterite ore

A laterite nickel ore and double-cycle technology, which is applied in the field of non-ferrous metallurgy, can solve the problems of inability to comprehensively utilize valuable metals, discharge, and poor comprehensive utilization of laterite nickel ore, and achieve the effect of reducing adverse effects and improving grades

Active Publication Date: 2010-04-07
河南永通不锈钢制品有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] To sum up, although there are many studies on the metallurgical process of laterite nickel ore, the comprehensive utilization effect of laterite nickel ore is not good due to the different mineral factors such as the source, grade and crystal structure of laterite nickel ore.
For example, laterite nickel ore generally contains mineral components such as chromium and aluminum. Traditional pyrometallurgical and hydrometallurgical processes cannot effectively comprehensively utilize these valuable metals, which leads to low industrial utilization value of laterite nickel ore on the one hand. , on the other hand, it leads to a large amount of toxic and heavy waste after smelting, which does not meet the requirements of clean production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The raw material laterite nickel ore comes from Indonesia, and its main element content is (weight%): Fe: 47.01%, Ni: 0.52%, Co: 0.039%, Mg: 0.32%, Cr: 2.21%, Al: 4.16%, Si: 2.21 %. After grinding and sieving, the ore whose particle size is below 200 mesh accounts for more than 80% of the total ore.

[0033] Take a certain amount of sodium hydroxide and laterite nickel ore according to the proportioning ratio of 0.65:1 of solid alkali ore, first make sodium hydroxide into an aqueous solution with a concentration of 40 (weight), and then mix it with laterite nickel ore in a kettle Wet mixing was carried out in the reactor by stirring, and the temperature was programmed to rise after mixing evenly, so that the reactor was first kept at 150°C for 2 hours, and then heated to 650°C at a rate of 5°C / min for 200 minutes of roasting reaction. The roasted material is discharged at high temperature, cooled and ground, washed with water three times, the washing temperature is 90°...

Embodiment 2

[0036] The raw material laterite nickel ore comes from Indonesia, and its main element content is (weight%): Fe: 47.01%, Ni: 0.52%, Co: 0.039%, Mg: 0.32%, Cr: 2.21%, Al: 4.16%, Si: 2.21 %. After grinding and sieving, the ore whose particle size is below 200 mesh accounts for more than 90% of the total ore.

[0037] According to the weight ratio of solid sodium hydroxide and the laterite nickel ore after grinding, the proportioning ratio of 1.5: 1 is taken by weighing sodium hydroxide and the laterite nickel ore after grinding; The aqueous solution, and then mixed with the ground laterite nickel ore in a tank reactor by stirring, and then dried after mixing evenly, and then carried out temperature programming, so that the tank reactor was first kept at 150 ° C for 2 hours to dry the mixture. Then, the temperature was raised to 800° C. at a rate of 5° C. / min for 120 minutes of roasting reaction to obtain a solid calcined material. The solid calcined material is discharged at r...

Embodiment 3

[0040] The raw material laterite nickel ore comes from the Philippines, and its main element content is (weight%): Fe: 52%, Ni: 1.05%, Co: 0.1%, Mg: 0.31%, Cr: 2.68%, Al: 1.68%, Si: 1.36 %. After grinding and sieving, the ore whose particle size is below 200 mesh accounts for more than 90% of the total ore.

[0041] Take by weighing sodium hydroxide and the laterite nickel ore after grinding according to the weight ratio of solid sodium hydroxide and the laterite nickel ore after grinding; The aqueous solution, and then mixed with the ground laterite nickel ore in the tank reactor by stirring, and after mixing evenly, the temperature program was raised, so that the tank reactor was first kept at 150 ° C for 2 hours to dry the mixture, and then 5 The temperature was raised to 400°C at a rate of °C / min for 200 minutes of roasting reaction to obtain a solid roasted material. The solid roasted material is discharged at high temperature, and the solid roasted material is ground a...

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Abstract

The invention provides an alkali-acid double-cycle process for treating brown iron type nickel laterite ore. In the process, a brown iron type depleted nickel laterite ore is used as a raw material and undergoes roasting reaction with alkali such as sodium hydroxide, potassium hydroxide and the like or carbonate thereof at high temperature, and then the roasted materials are subjected to waster washing and liquid-solid separation to form alkali filter liquor rich in valent metal salts such as water-soluble chromate, aluminate and the like and insoluble filter cakes, wherein the filter liquor can be fully utilized to prepare chromium salt and aluminum salt and the recycle of alkali media is realized; and the filter cakes can be used for extracting nickel and cobalt through a subsequent pressurized and acid leaching process, the acid leaching dregs are high-grade fine iron powder, and acid media in the acid leaching liquor can be recycled.

Description

technical field [0001] The invention relates to the field of nonferrous metal metallurgy, in particular to an alkali-acid double cycle process for treating limonite-type lateritic nickel ore. Background technique [0002] Nickel has excellent properties and has become an indispensable metal in aviation industry, defense industry and daily life. The mineable nickel resources in the world are divided into nickel sulfide ore and nickel oxide ore. At present, about 70% of the world's nickel is extracted from nickel sulfide ore. However, with the gradual reduction of nickel sulfide ore resources, the process of extracting nickel and cobalt from nickel oxide ore has gradually attracted widespread attention. Nickel oxide ore is red, so it is also called laterite nickel ore. The nickel compounded in the nickel oxide deposit accounts for 65% of the total nickel reserves. [0003] The mineable part of lateritic nickel ore generally consists of limonite layer, transition layer and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/00C22B1/02C22B3/08C22B3/06C22B21/00C22B34/32
CPCY02P10/20
Inventor 董书通王成彦齐涛曲景奎赵平尹飞
Owner 河南永通不锈钢制品有限公司
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