Indonesia's local laterite-nickel ore wet-process smelting method

A laterite nickel ore and hydrometallurgy technology, applied in the field of smelting, can solve the problems of low recovery rate, high energy consumption, high emission, etc., and achieve the effect of high nickel content, high recovery rate, and reduced production cost

Inactive Publication Date: 2019-02-26
钢一控股集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The smelting methods from laterite nickel ore to nickel-iron or other commodity-grade nickel-iron compounds are roughly divided into pyrometallurgy and hydrometallurgy. The pyrometallurgical process uses the principle of different melting points of mineral elements to calcinate the mineral

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Weigh 1000kg of raw ore, add 3500kg of water, put it in the ore concentrator, mix and filter by itself, and mill three-stage ball mill, so that the ore becomes 325 mesh ore pulp, accounting for more than 90%.

[0045] (2) Put the ore slurry in the reaction kettle, add 100kg of HCl and 50kg of NaCl, and stir and leach for 1 hour.

[0046] (3) Separating the leached ore pulp into solid and liquid, taking the leaching liquid, washing the solid part with water and then reaching the discharge standard for filling and reclamation.

[0047] (4) Pump the liquid into the reaction kettle and add methanol extractant at a ratio of 1:0.5. After stirring for half an hour, precipitate for half an hour for separation.

[0048] (5) Ozone is introduced into the upper extraction agent, and after nickel, iron, and chromium ions are produced and reacted, they become oxidized precipitates for solid-liquid separation. The solid is the main product, and the extractant is recycled.

[0049...

Embodiment 2

[0057] A kind of laterite nickel ore hydrometallurgy method for local Indonesia, comprises the following steps:

[0058] 1) Weigh 100 parts of lateritic nickel ore, add 300 parts of water, put it in the concentrator, mix and filter it by itself, and mill in three stages of ball milling, fully crush the silicon magnesium package of cracked nickel, and obtain a slurry with a particle size of more than 325 meshes accounting for more than 90% of the solid .

[0059] 2) Add 80 parts of hydrochloric acid and 45 parts of sodium chloride to the pulp and carry out the leaching reaction for 70 minutes under stirring to release the metal in the form of ions.

[0060] 3) Solid-liquid separation, so that the metal is dissolved in the liquid in the form of ions. For the solid raw ore mainly composed of silica, it is washed with water to meet the discharge standard before filling and reclamation.

[0061] 4) Pump the liquid into the reaction kettle, add the extractant methanol, stir for 20 ...

Embodiment 3

[0067] A kind of laterite nickel ore hydrometallurgy method for local Indonesia, comprises the following steps:

[0068] 1) Weigh 100 parts of laterite nickel ore, add 400 parts of water and put it in the ore concentrator for mixing and self-filtering, and three-stage ball milling in the mill to fully pulverize the silicon and magnesium package of cracked nickel to obtain a slurry with a particle size of more than 325 meshes accounting for more than 90% of the solid .

[0069] 2) Add 120 parts of hydrochloric acid and 55 parts of sodium chloride to the pulp and carry out leaching reaction for 50 minutes under stirring to release the metal in the form of ions.

[0070] 3) Solid-liquid separation, so that the metal is dissolved in the liquid in the form of ions. For the solid raw ore mainly composed of silica, it is washed with water to meet the discharge standard before filling and reclamation.

[0071] 4) Pump the liquid into the reaction kettle, add the extractant methanol, ...

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PUM

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Abstract

The invention relates to the field of smelting, and discloses an Indonesia's local laterite-nickel ore wet-process smelting method. The method comprises the following steps: 1) adding water into laterite-nickel ore and grinding the laterite-nickel ore into ore pulp; 2) adding hydrochloric acid and sodium chloride for leaching; 3) carrying out solid-liquid separation; 4) extracting and separating Ni < 2 + >, Fe < 2 + > and Cr < 3 + > in the liquid by using an extraction agent; 5) introducing ozone into the upper-layer extraction agent, carrying out solid-liquid separation, taking the precipitate as a main product, and circularly using the extraction agent; and 6) introducing the ozone into a lower-layer water solution, carrying out solid-liquid separation, and taking the precipitate as an auxiliary product after solid-liquid separation; and circularly using Na < + >, H < + > and Cl <-> in the lower-layer water solution. The method disclosed by the invention is innovated on the basis ofa traditional wet-process smelting process, and the local conditions are sufficiently taken into consideration, Indonesia's local specific natural resources are utilized, and most of the chemical agents are recycled, so that the production cost is greatly reduced, the whole process system tends to zero emission, the content of nickel in the product is high, and the recovery rate is high.

Description

technical field [0001] The invention relates to the field of smelting, in particular to a local Indonesian laterite nickel ore hydrometallurgy method. Background technique [0002] With the development of the global economy, the progress of society and the improvement of people's living standards, the demand for stainless steel is increasing. The output of stainless steel in China alone has reached 30 million tons, and the market value has reached 600 billion yuan. The main component of stainless steel is nickel, followed by chromium and iron, and laterite nickel ore contains valuable metal elements such as nickel, iron and chromium, which are all necessary elements for stainless steel. The pricing of products currently in circulation in the market is mainly based on the effective metal nickel, while chromium and iron are not. In this way, stainless steel plants use the ferronickel from laterite nickel ore as raw materials, which greatly reduces production costs. Compared wi...

Claims

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Application Information

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IPC IPC(8): C22B23/00C22B3/10C22B3/26
CPCC22B23/0423C22B23/0461C22B3/262Y02P10/20
Inventor 陈杰吴正义范晓燕
Owner 钢一控股集团有限公司
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