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Hydrometallurgical method for refining tungsten from tungsten oxide limonite

A technology of hydrometallurgy and limonite, which is applied in the direction of improving process efficiency, can solve the problems of high energy consumption, high cost, and inability to realize comprehensive utilization of valuable resources, and achieve clear solution, easy filtration, and improved comprehensive utilization efficiency effect

Active Publication Date: 2014-11-05
李海波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the traditional production process of tungsten limonite has high energy consumption and high cost, and the comprehensive utilization of valuable resources cannot be realized.

Method used

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  • Hydrometallurgical method for refining tungsten from tungsten oxide limonite

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Effect test

Embodiment 1

[0036]The process method is used to process tungsten-containing limonite containing 31% iron and 0.3% tungsten. Firstly, the limonite is processed by a sand blasting machine, and then the particles are sent to the jigging beneficiation according to the solid-to-liquid ratio of 1:10 and river water (can process 40-60T raw ore per hour, power consumption 22KWH), and select coarse-grained concentrate, Medium ore and tailings; combine coarse-grained concentrate and medium ore to obtain enriched concentrate containing 1.5% tungsten oxide, and the tailings are sent as raw materials for cement building materials; the enriched tungsten concentrate is divided into tungsten concentrate: sodium carbonate: Calcium oxide: anthracite = 20:0.8:0.3:1 mass ratio mixed; roasted at 750°C for 10 minutes, the roasted sintered body is air-cooled and heat-exchanged, cooled, and then enters the mill to obtain a particle size of 120 mesh The above reduced roasting powder; the leaching mother liquor is...

Embodiment 2

[0038] The process method is used to process tungsten-containing limonite containing 26% iron and 0.6% tungsten. First, the limonite is processed by a sand blasting machine, and then the particles are sent to the jig beneficiation according to the solid-to-liquid ratio of 1:10 and mountain spring water (can process 40-60T raw ore per hour, and the power consumption is 22KWH), and the coarse-grained concentrate, Medium ore and tailings; combine coarse-grained concentrate and medium ore to obtain enriched concentrate containing 2% tungsten oxide, and the tailings are sent as raw materials for cement building materials; the enriched tungsten concentrate is divided into tungsten concentrate: sodium carbonate: Calcium oxide: anthracite = 20:0.8:0.3:1 mass ratio mixed; roasted at 750 ° C for 12 minutes, the roasted sintered body is air-cooled and heat-exchanged, cooled, and then enters the mill to obtain a particle size of 120 mesh The above reduced roasting powder; the leaching mot...

Embodiment 3

[0040] The process method is used to process tungsten-containing limonite containing 30% iron and 0.5% tungsten. Firstly, the limonite is processed by a sand blasting machine, and then the particles are sent to the jigging beneficiation according to the solid-to-liquid ratio of 1:10 and river water (can process 40-60T raw ore per hour, power consumption 22KWH), and select coarse-grained concentrate, Medium ore and tailings; combine coarse-grained concentrate and medium ore to obtain enriched concentrate containing 1.6% tungsten oxide, and the tailings are sent as raw materials for cement building materials; the enriched tungsten concentrate is divided into tungsten concentrate: sodium carbonate: Calcium oxide: anthracite = 20:0.8:0.3:1 mass ratio mixed; roasted at 800°C for 15 minutes, the roasted sintered body is air-cooled and heat-exchanged, cooled, and then enters the pulverizer to obtain a particle size of 120 mesh The above reduced roasting powder; the leaching mother li...

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Abstract

The invention discloses a hydrometallurgical method for refining tungsten from tungsten oxide limonite and belongs to separation and enrichment technologies for low-grade tungsten. The method comprises the steps: (1) carrying out physical enrichment on the limonite; (2) roasting enriched concentrates; (3) carrying out alkali leaching; (4) neutralizing to deslag; (5) producing calcium tungstate; (6) treating waste liquid. According to the method, the limonite is subjected to physical enrichment, the other ingredients of tailings are almost unchanged except for tungsten oxide, precipitated residue is still a raw material for cement production, tail water is reused unlimitedly, and no chemical adjuvant is required, so that the method is very environmentally friendly and very energy-saving; after slag, obtained after filtering, is cleaned, the slag is also limonite for firing cement, so that no waste solid is produced.

Description

technical field [0001] The invention discloses a hydrometallurgy method for extracting tungsten from tungsten limonite oxide, which belongs to the separation and enrichment technology of low-grade tungsten. technical background [0002] China is the world's largest tungsten mining country and has an advantage in the world. However, the current technology suitable for industrial smelting can only selectively mine tungsten ores that are easy to enrich and have relatively high grades, and tungsten with high added value is sold abroad at low prices. After long-term flood mining, rich tungsten ore and easy-to-select tungsten ore are gradually decreasing and are on the verge of exhaustion. However, low-grade tungsten-limonite oxides are accumulated as waste residues. If things go on like this, it is easy to cause the exhaustion of domestic tungsten ore resources, vegetation destruction and environmental pollution, and leave various safety hazards. Tungsten oxide limonite is a po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B3/12C22B3/44C22B34/36
CPCY02P10/20
Inventor 李平建
Owner 李海波
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