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Device and method for recovering elemental sulfur in sulfur-containing hydrometallurgy slag

A technology of hydrometallurgy and recovery device, applied in chemical instruments and methods, sulfur compounds, non-metallic elements, etc., can solve the problems of poor environmental protection, low recovery rate, complicated operation, etc.

Pending Publication Date: 2020-07-10
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The main purpose of the present invention is to provide a device and method for recovering elemental sulfur in sulfur-containing hydrometallurgical slag, so as to solve the problems of low recovery rate, poor environmental protection and Complicated operations, etc.

Method used

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  • Device and method for recovering elemental sulfur in sulfur-containing hydrometallurgy slag
  • Device and method for recovering elemental sulfur in sulfur-containing hydrometallurgy slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Take 100g of sulfur-containing hydrometallurgical slag, add 500mL of water at a solid-to-liquid ratio of 1:5, and wash at 70°C for 30min. After solid-liquid separation by a vacuum filter, the washed residue is obtained. Mix the washed slag with water at a ratio of 1:2, and then add it to a ball mill for ball milling for 2 hours.

[0054] Pour the obtained pulp into the flotation cell of the flotation machine, add water at a solid-to-liquid ratio of 1:5, stir and inflate for 30 minutes. Tailings, ie desulfurization slag, are obtained in the lower part of the flotation cell; bubbles in the upper part are collected by a bubble scraper to obtain a sulfur-rich material slurry, which is subjected to liquid-solid separation and drying to obtain a sulfur-rich material.

[0055] The sulfur-rich material is directly added to the sulfur melting kettle, heated to 140°C and kept for 1 hour. Subsequently, the liquid sulfur was filtered to obtain a sulfur product with a purity of 99...

Embodiment 2

[0057] Take 100g of sulfur-containing hydrometallurgical slag, add 500mL of water at a solid-to-liquid ratio of 1:5, and wash at 70°C for 30min. After solid-liquid separation by a vacuum filter, the washed residue is obtained. Mix the washed slag with water at a ratio of 1:2, and then add it to a ball mill for ball milling for 2 hours.

[0058] Pour the obtained pulp into the flotation cell of the flotation machine, add water at a solid-to-liquid ratio of 1:6, stir and inflate for 40 minutes. Tailings, ie desulfurization slag, are obtained in the lower part of the flotation cell; bubbles in the upper part are collected by a bubble scraper to obtain a sulfur-rich material slurry, which is subjected to liquid-solid separation and drying to obtain a sulfur-rich material.

[0059] The sulfur-rich material is directly added to the sulfur melting kettle, heated to 150°C and kept for 1.5h. Subsequently, the liquid sulfur is filtered to obtain a sulfur product with a purity of 99.90%,...

Embodiment 3

[0061] Take 100g of sulfur-containing hydrometallurgical slag, add 500mL of water at a solid-to-liquid ratio of 1:5, and wash at 70°C for 30min. After solid-liquid separation by a vacuum filter, the washed residue is obtained. Mix the washed slag with water at a ratio of 1:2, and then add it to a ball mill for ball milling for 2 hours.

[0062] Pour the obtained pulp into the flotation cell of the flotation machine, add water according to the ratio of solid to liquid 1:5, stir and inflate for 60 minutes. Tailings, ie desulfurization slag, are obtained in the lower part of the flotation cell; bubbles in the upper part are collected by a bubble scraper to obtain a sulfur-rich material slurry, which is subjected to liquid-solid separation and drying to obtain a sulfur-rich material.

[0063] The sulfur-rich material is directly added to the sulfur melting kettle, heated to 150°C and kept for 2 hours. Subsequently, the liquid sulfur is filtered to obtain a sulfur product with a ...

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Abstract

The invention provides a device and a method for recovering elemental sulfur in sulfur-containing hydrometallurgy slag. The device comprises a flotation unit, a sulfur melting unit, a heat preservation and clarification unit and a filtering unit. The flotation unit is provided with a sulfur-containing hydrometallurgy slag slurry inlet, a sulfur-rich material outlet and a desulfurization slag outlet, and the flotation unit is used for conducting air inflation flotation on the sulfur-containing hydrometallurgy slag slurry to obtain a sulfur-rich material and desulfurization slag; the sulfur melting unit is provided with a sulfur-rich material inlet and a sulfur melting material outlet, the sulfur-rich material inlet is connected to a sulfur-rich material outlet, and the sulfur melting unit is used for melting elemental sulfur in the sulfur-rich material to obtain a sulfur melting material; the heat preservation and clarification unit is provided with a sulfur melting material inlet and aclarified material outlet, and the sulfur melting material inlet is connected to the sulfur melting material outlet; the filtering unit is provided with a clarified material inlet and an elemental sulfur outlet, and the clarified material inlet is connected to the clarified material outlet. The method integrates the advantages of flotation method and hot filtration method, and is an elemental sulfur recovery process which is low in cost, simple and convenient to operate and high in sulfur recovery rate.

Description

technical field [0001] The invention relates to the field of resource recovery of elemental sulfur, in particular to a device and method for recovering elemental sulfur in sulfur-containing hydrometallurgical slag. Background technique [0002] my country is a big country of sulfur consumption, but the sulfur resources in our country are relatively scarce, and the sulfur is highly dependent on foreign countries. Sulfur-containing hydrometallurgical slag contains a large amount of elemental sulfur, such as chlorination leaching slag of sulfide ore, atmospheric oxygen-enriched leaching slag, and anode slime produced by nickel electrolysis. Due to the lack of reasonable resource recovery technology, these sulfur-containing hydrometallurgical slags have been piled up in the slag yard for a long time, which poses a potential threat to the local environment and poses a great safety hazard. Therefore, if these sulfur-containing hydrometallurgical slags can be reduced and recovered...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/027
CPCC01B17/027C01P2006/80
Inventor 王晓丹李树超徐小锋
Owner CHINA ENFI ENGINEERING CORPORATION