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Method for treating low-grade tungsten concentrate and tungsten slag

A processing method and a technology of tungsten concentrate, applied in the field of comprehensive utilization of resources, can solve the problems of comprehensive recycling and utilization of tungsten elements that have not been considered, and achieve the effects of improving comprehensive utilization efficiency, facilitating industrial production, and simple equipment

Active Publication Date: 2014-03-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the focus of this method is to digest the waste residue, and the comprehensive recovery and utilization of the residual tungsten element is not considered.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]The process method is used to treat tungsten slag containing 41wt% iron and 1.8wt% tungsten. Mix tungsten slag and coal powder at a mass ratio of 4:1, the amount of reducing roasting enhancer sodium sulfite is 20% of the total mass of tungsten slag and coal powder, the roasting temperature is 900°C, and the roasting time is 30 minutes. The roasted product After being ground by a mill until the particles of -0.074mm account for 70%, neutral leaching is carried out according to the ratio of solid-liquid volume ratio of 1:5, the leaching temperature is 50°C, and the leaching time is 15 minutes. Magnetic separation is carried out in a magnetic field, and the obtained concentrate is iron concentrate, and the obtained tailings are mixed products rich in valuable elements such as manganese, copper, zinc, bismuth, cobalt, tantalum, and niobium. The magnetic separation tailings are desiliconized with dilute hydrochloric acid (the mass concentration of dilute hydrochloric acid is ...

Embodiment 2

[0035] The process method is used to treat tungsten slag containing 32wt% iron and 3.1wt% tungsten. Mix tungsten slag and coal powder at a mass ratio of 5:1, the amount of reducing roasting enhancer sodium bicarbonate is 15% of the total mass of tungsten slag and coal powder, the roasting temperature is 800°C, and the roasting time is 40min. The product is ground by a mill until -0.074mm particles account for 70%, and neutral leaching is carried out at a solid-liquid volume ratio of 1:6. The leaching temperature is 50°C, and the leaching time is 15 minutes. The obtained liquid is the tungstate solution, and the leaching residue Magnetic separation is carried out in a 450GS magnetic field, and the obtained concentrate is iron concentrate, and the obtained tailings are mixed products rich in valuable elements such as manganese, copper, zinc, bismuth, cobalt, tantalum, and niobium. The magnetic separation tailings are desiliconized with dilute hydrochloric acid (the mass concentr...

Embodiment 3

[0039] The process method is used to treat tungsten slag containing 21wt% iron and 6.34wt% tungsten. Mix tungsten slag and coal powder at a mass ratio of 5:1, the amount of reducing roasting enhancer sodium nitrate is 20% of the total mass of tungsten slag and coal powder, the roasting temperature is 800°C, and the roasting time is 50min. The product is ground by a mill until -0.074mm particles account for 70%, and neutral leaching is carried out at a solid-liquid volume ratio of 1:5. The leaching temperature is 50°C, and the leaching time is 15 minutes. The obtained liquid is tungstate solution, and the leaching residue is in Magnetic separation is carried out in a 450GS magnetic field, and the obtained concentrate is iron concentrate, and the obtained tailings are mixed products rich in valuable elements such as manganese, copper, zinc, bismuth, cobalt, tantalum, and niobium. The magnetic separation tailings are desiliconized with dilute hydrochloric acid (the mass concentra...

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PUM

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Abstract

The invention discloses a method for treating low-grade tungsten concentrate and tungsten slag. The method comprises the steps of mixing low-grade tungsten concentrate or tungsten slag and coal powder with a reduction roasting enhancer, and then performing reduction roasting; grinding the product obtained through the reduction roasting, then performing neutral leaching to obtain a tungstate solution and leaching residues, and performing magnetic separation on the leaching residues by adopting a magnetic field so as to obtain iron concentrate and valuable metal tailings; removing silicon from the valuable metal tailings by using dilute hydrochloric acid and leaching out manganese from the valuable metal tailings by using concentrated hydrochloric acid in sequence, and then leaching out tantalum and niobium by using hydrofluoric acid to prepare tantalum and niobium products. By adopting the method, valuable elements including tungsten, iron, copper, manganese, bismuth, cobalt, tantalum, niobium and the like which are difficult to extract in the low-grade tungsten concentrate and tungsten slag can be efficiently enriched, separated and recovered effectively, so that the resource comprehensive utilization of the valuable elements in the low-grade tungsten concentrate or tungsten slag is realized; moreover, the method is simple in equipment, short in flow, simple and convenient in operation, is economical and reliable, and is favorable for industrial production.

Description

technical field [0001] The invention relates to a treatment method for low-grade tungsten concentrates and tungsten slags, in particular to a method for efficiently extracting tungsten elements from low-grade tungsten concentrates and tungsten slags, and comprehensively recovering iron, manganese, copper, bismuth, cobalt tantalum, niobium, etc. The invention discloses a new method for valence metal elements, which belongs to the field of comprehensive utilization of resources. Background technique [0002] my country is rich in tungsten ore resources and has maintained a dominant position in the world for a long time. It is currently the world's largest producer, consumer and supplier of tungsten. Foreign countries mainly develop scheelite, and China has been mainly mining wolframite resources for a long time. Wolframite deposits are mostly steeply inclined thin veins, which have the advantages of good quality, easy mining, and easy selection, and are relatively concentrated...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B3/04C22B7/00C22B34/36C22B47/00C22B34/24B03C1/02
CPCY02P10/20
Inventor 孙伟韩海生刘文莉唐鸿鹄
Owner CENT SOUTH UNIV
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