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Method for leaching and extracting valuable metal and sulfur element from low nickel matte

A technology of valuable metals and sulfur elements, applied in the field of metallurgy, can solve problems such as harsh process conditions and high energy consumption, and achieve the effects of short process flow, reduced investment costs, and low equipment requirements

Inactive Publication Date: 2021-12-10
GUANGDONG BRUNP RECYCLING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method needs to be roasted at a temperature above 500°C, the process conditions are harsh, and the energy consumption is large.

Method used

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  • Method for leaching and extracting valuable metal and sulfur element from low nickel matte

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Experimental program
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Effect test

Embodiment 1

[0043] A method for extracting valuable metals and sulfur elements by low nickel matte leaching, low nickel matte components: 20.98% nickel, 8.97% copper, 0.76% cobalt, 41.29% iron, 24.35% sulfur, the valuable metals and sulfur are extracted through the following steps element:

[0044] (1) Raw material pretreatment: crush 100g of low-matte nickel into powder or granular form, and pass through a sieve size standard of not higher than 200 mesh after the low-matte nickel is crushed;

[0045] (2) Oxidative leaching: Add 400mL ferric chloride with an iron ion concentration of 1.0mol / L and 100mL carbon disulfide organic solvent to the pulverized material obtained in step (1), blow air from the bottom under constant stirring, and control the reaction The temperature is 100°C, the reaction time is 5 hours, and water and ferric salt are added to the reaction system every 40 minutes to maintain the concentration of ferric ions in the water phase at 1.0-1.5mol / L;

[0046] (3) Separatio...

Embodiment 2

[0050] A method for extracting valuable metals and sulfur elements by low nickel matte leaching, low nickel matte components: nickel 23.66%, copper 6.73%, cobalt 1.36%, iron 38.04%, sulfur 24.35%, extracting valuable metals and sulfur through the following steps element:

[0051] (1) Raw material pretreatment: crush 100g of low-matte nickel into powder or granular form, and pass through a sieve size standard of not higher than 200 mesh after the low-matte nickel is crushed;

[0052] (2) Oxidative leaching: adding 1000mL ferric ion concentration to ferric sulfate of 2.0mol / L and 3000mL carbon tetrachloride organic solvent in step (1) gained pulverized material, in the state of constantly stirring, blow into oxygen from the bottom, and Control the reaction temperature to 120°C, the reaction time to 6h, add water and ferric salt to the reaction system every 30min, and maintain the concentration of ferric ion in the water phase at 2.0-2.5mol / L;

[0053] (3) Separation treatment: ...

Embodiment 3

[0056] A method for extracting valuable metals and sulfur elements by low nickel matte leaching, low nickel matte components: nickel 26.55%, copper 5.7%, cobalt 1.06%, iron 32.19%, sulfur 27.45%, extracting valuable metals and sulfur through the following steps element:

[0057] (1) Raw material pretreatment: crush 100g of low-matte nickel into powder or granular form, and pass through a sieve size standard of not higher than 200 mesh after the low-matte nickel is crushed;

[0058] (2) Oxidative leaching, add 1000mL ferric ion concentration to iron nitrate of 3mol / L and 2000mL tetrachloroethane organic solvent in the pulverized material gained in step (1), blow into air from the bottom under the state of constantly stirring, and control The reaction temperature is 80° C., and the reaction time is 10 h. Add water and ferric salt to the reaction system every 20 minutes to maintain the concentration of ferric ions in the water phase at 3.0-5.5mol / L;

[0059] (3) Separation trea...

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Abstract

The invention discloses a method for leaching and extracting valuable metals and sulfur elements from low nickel matte. The method comprises the following steps that a trivalent iron salt solution and an organic solvent are added into a low nickel matte crushed material, oxidizing gas is introduced in a stirring state to react, and a solid slag layer, an organic layer and a water layer are separated after the reaction is finished. According to the method for leaching and extracting the valuable metals and sulfur elements from the low nickel matte, the low nickel matte is subjected to oxidation leaching through the oxidability of ferric ions, in the whole reaction process, iron in the low nickel matte is oxidized after being leached to form ferric hydroxide, only water and oxygen are consumed, ferric iron is consumed only when nickel, copper and cobalt metal ions are leached, elemental sulfur generated through the reaction is dissolved through an organic solvent. A passivation layer is prevented from being formed to hinder the reaction; the process flow is short, reaction can be carried out under normal pressure, the requirement for equipment is low, the production cost is low, the blowing process of intermediate product high nickel matte is omitted, waste of valuable metal is avoided, auxiliary materials are saved, meanwhile, the investment cost is reduced, and the method for leaching and extracting the valuable metals and sulfur elements from the low nickel matte is suitable for industrial popularization.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for extracting valuable metals and sulfur elements by leaching low nickel matte. Background technique [0002] Low nickel matte is an intermediate product of matte smelting in the traditional pyrometallurgy process. Because the composition of the low nickel matte obtained by matte smelting is not enough to meet the treatment requirements of the refining process, it needs to be further blown into high nickel matte. In the process of blowing low nickel matte into high nickel matte, the temperature of the converter needs to reach 1200-1300°C, and the blowing time is as long as 8-10 hours. Most of Co and some Ni and Cu will be oxidized together with iron to form converter slag, resulting in The waste of resources, and the blowing process is lengthy and complicated, the energy consumption is large, and the pollution is serious. On the other hand, compared with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/00C22B3/38C22B15/00C01G53/10C01G3/12C01B17/06
CPCC22B7/006C22B23/0407C22B23/0461C22B23/0476C22B15/0065C01G3/12C01G53/10C01B17/06Y02P10/20
Inventor 余海军谢英豪李爱霞张学梅李长东
Owner GUANGDONG BRUNP RECYCLING TECH
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