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Method for comprehensively recovering useful metals from APT tungsten smelting slag

A kind of smelting slag, a useful technology, applied to the improvement of process efficiency, solid separation, etc., can solve the problems of large environmental impact, low recovery rate, high cost, etc., and achieve the effect of low investment cost, wide application range, and easy industrial application

Inactive Publication Date: 2018-05-08
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, only using a single process to recover useful metals has certain limitations, and there are problems such as low recovery rate, large loss, high cost and great impact on the environment.

Method used

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  • Method for comprehensively recovering useful metals from APT tungsten smelting slag
  • Method for comprehensively recovering useful metals from APT tungsten smelting slag
  • Method for comprehensively recovering useful metals from APT tungsten smelting slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Useful metals are recovered from the tungsten smelting slag sample whose element content is shown in Table 1:

[0026] Table 1: Sample chemical multi-element analysis / %

[0027]

[0028] 1. Sieve and mix samples according to step (1). The mass concentration of the pulp is 15%, the stirring time is 30 minutes, the dosage of dispersant is 300g / t, and the stirring speed is 1800r / min. The sieve hole is 0.074mm) for classification, the product on the sieve is returned to the mixing drum, and the product under the sieve is subjected to the process of step (2).

[0029] 2. The under-screen material obtained in step (1) is sent into a high gradient magnetic separator to reclaim magnetic iron minerals with a mass concentration of 15% in the form of pulp. The magnetic field strength is 8000 Oersted. After two selection operations, the obtained iron The concentrate grade is 47.84%, and the recovery rate is 85.34%.

[0030] 3. Use the rotary vibrating disk concentrator to reco...

Embodiment 2

[0039] Useful metals are recovered from the tungsten smelting slag sample whose element content is shown in Table 2:

[0040] Table 2: Sample chemical multi-element analysis / %

[0041]

[0042] 1. Sieve and mix samples according to step (1). The mass concentration of the pulp is 10%, the stirring time is 60 minutes, the dosage of dispersant is 500g / t, and the stirring speed is 2000r / min. After stirring, it is sent into a high-frequency vibration fine screen ( The sieve hole is 0.074mm) for classification, the product on the sieve is returned to the mixing drum, and the product under the sieve is subjected to the process of step (2).

[0043] 2. The under-screen material obtained in step (1) is sent into a high gradient magnetic separator to reclaim magnetic iron minerals with a mass concentration of 15% in the form of pulp. The magnetic field strength is 8000 Oersted. After two selection operations, the obtained iron The concentrate grade is 43.25%, and the recovery rate i...

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Abstract

The invention belongs to the metal recovery technology in the field of beneficiation and wet-process smelting, and particularly relates to a method for recovering tungsten, tin, iron, scandium, niobium and other metal elements from tungsten smelting slag. The specific technological process comprises the following steps of (1), screening and uniformly mixing the tungsten smelting slag; (2), recovering the iron by adopting a high-gradient magnetic separator magnetic separation process to obtain iron ore concentrate; (3), recovering cassiterite by using a rotary-vibration disc concentrator; (4),recovering the tungsten by adopting a centrifugal concentrator; and (5), recovering the three kinds of rare metals, namely the scandium, tantalum and the niobium from centrifugal tailings, wherein theprocess which comprises medium-temperature medium-pressure hydrochloric acid leaching, extraction, washing and back extraction is adopted to recover the scandium, and the tantalum and the niobium arerecovered by adopting a purification process after being leached in hydrofluoric acid. According to the method for comprehensively recovering the useful metals from the APT tungsten smelting slag, awhole set of process method for recovering the iron, manganese, the tungsten, the tin, the scandium, the tantalum and the niobium from the tungsten smelting slag is provided, the beneficiation and smelting combined technology is advanced, the process application range is wide, the investment cost is low, and the industrial application is easy to realize.

Description

technical field [0001] The invention belongs to metal recovery technology in the field of ore dressing and hydrometallurgy, in particular to a method for recovering metal elements such as tungsten, tin, iron, scandium and niobium from tungsten smelting slag. Background technique [0002] APT tungsten smelting slag is a hazardous waste slag produced by tungsten smelting enterprises after producing APT. The tungsten concentrate is produced after leaching by high alkali process. The smelting slag contains a large amount of useful metals, including tungsten, tin, iron, scandium, tantalum and niobium, etc. It has strong economic value and is a rare secondary resource. At present, many scholars and researchers have conducted a lot of research on the treatment of tungsten slag, such as recycling tungsten and tin by mineral processing or extracting rare metal scandium by metallurgical methods. In recent years, pretreatment by roasting-acid-base leaching-extraction, etc. There are a...

Claims

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Application Information

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IPC IPC(8): B03B9/04C22B7/00
CPCB03B9/04C22B7/006Y02P10/20
Inventor 杨俊彦张建东闫国庆王力军车小奎郑其
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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