Process of extracting white tungsten concentrate from tungstenic iron ores or tungstenic waste residues

A technology of tungsten iron ore and technology, which is applied in the field of extracting scheelite concentrate, can solve the problems of limited use, high cost, and discharge into rivers, etc., and achieve the effects of improving washing effect, reducing soda ash consumption, and having little environmental impact

Active Publication Date: 2014-09-17
湖南天泰天润新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Out of every 30 days of production, 10 days are used to stop the furnace and shovel the kiln, which cannot guarantee continuous production, resulting in high costs
The above two methods will produce a large amount of saline waste liquid in the production process, which cannot be treated, but is directly discharged into rivers, which seriously affects the environment. Today, environmental protection is increasingly strict, which limits the application of the above methods

Method used

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  • Process of extracting white tungsten concentrate from tungstenic iron ores or tungstenic waste residues
  • Process of extracting white tungsten concentrate from tungstenic iron ores or tungstenic waste residues
  • Process of extracting white tungsten concentrate from tungstenic iron ores or tungstenic waste residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Step 1: Press the pellets

[0037] After crushing tungsten-containing iron ore powder (the specific components are shown in Table 1) into particles with a particle size of -100 mesh and a mass content of not less than 80%, mix it with soda ash, double salt and circulating tail liquid I in a mass ratio of 1:0.2 :0.15:0.2 Mix evenly, and the obtained mixture is pressed to obtain oblate pellets with a diameter of about Φ43mm.

[0038] Step 2: Roasting and leaching

[0039] Put the pellets obtained in step 1 into a vertical kiln and use gas to roast, maintain the temperature at 750°C and roast for 1.6h (the main components of the slag after roasting are shown in Table 2), after the roasted pellets are cooled, add them to the circulating tail liquid In I, at room temperature, leaching is carried out while grinding, and the mass content of solid particles is not less than 75% after grinding until the particle size is -100 mesh, and the leaching time is 1 hour; at the same ti...

Embodiment 2

[0062] Step 1: Press the pellets

[0063] After the APT slag powder (the main components are shown in Table 5) is crushed into a particle size of -100 mesh particle mass content not less than 80%, it is mixed with soda ash, double salt and circulating tail liquid I in a mass ratio of 1:0.25 :0.16:0.16 Mix evenly, and the obtained mixture is pressed to obtain oblate pellets with a diameter of about Φ45mm.

[0064] Step 2: Roasting and leaching

[0065] Put the pellets obtained in Step 1 into a shaft kiln and use gas to roast them, and keep them roasted at a temperature of 780°C for 1.8 hours (the main components of the slag after roasting are shown in Table 6). After the roasted pellets are cooled, add them to the circulation In the tail liquid I, at room temperature, leaching is carried out while grinding, and the mass content of solid particles is not less than 80% when the particle size is -100 mesh, and the leaching time is 1.4h; at the same time, by controlling the amount...

Embodiment 3

[0087] Step 1: Press the pellets

[0088] The reclaimed tungsten-containing catalyst (the specific components are shown in Table 9) is crushed into a particle size of -100 mesh and the mass content is not less than 80%, and the mass ratio of soda ash, double salt and circulating tail liquid I is 1:0.30: 0.16:0.25 are mixed evenly, and the obtained mixture is pressed to obtain oblate pellets with a diameter of about Φ50mm.

[0089] Step 2: Roasting and leaching

[0090] Put the pellets obtained in step 1 into a shaft kiln and use gas to roast, maintain a temperature of 800°C and roast for 1.5 hours (the main components of the slag after roasting are shown in Table 10), after the roasted pellets are cooled, add them to the circulating tail liquid In I, under room temperature conditions, leaching is carried out while grinding, and the mass content of solid particles is not less than 80% after grinding until the particle size is -100 mesh, and the leaching time is 0.8h; at the sa...

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Abstract

The invention discloses a process of extracting white tungsten concentrate from tungstenic iron ores or tungstenic waste residues. The process comprises the following steps: after smashing tungstenic iron ores or tungstenic waste residues, mixing with sodium carbonate and double salt and pressing to form pellets; then, calcining at an appropriate temperature; leaching the calcined pellets by use of a ball-mill; then carrying out resin ion exchange, desorption, impurity removal and crystallization on leach liquor to finally obtain the white tungsten concentrate. The process can be used for effectively separating high grade white tungsten concentrate from tungstenic iron ores or tungstenic waste residues with extremely low grade of tungsten, is low in energy consumption, low in production cost, small in discharge capacity and environment-friendly, and can be used for effectively realizing comprehensive resource utilization, thereby satisfying the industrialized production.

Description

technical field [0001] The invention relates to a process for extracting scheelite concentrate from tungsten-containing iron ore or tungsten-containing waste residue, and belongs to the technical field of rare metal metallurgy. Background technique [0002] Tungsten ore is also known as high-iron tungsten ore (CaFe 2 (WO 4 ) 7 ·H 2 O) is one of the 20 kinds of tungsten ores. The domestic tungsten academic circle has judged that this mineral has no industrial value (see "Theory and Application of Tungsten Smelting" written by Zhao Zhongwei - Tsinghua University Press). [0003] Wolfite ore contains about 2% tungsten trioxide on average and about 40% iron on average. Tungsten is disseminated and embedded in the ore without forming monomer particles. , electric separation, etc.) cannot separate and enrich tungsten and iron. There are a large number of such minerals in the Lingnan area of ​​my country, and they have been mined and sold as low-grade iron ore for a long time....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/36C22B7/00C22B1/24C22B1/214C22B3/12
CPCY02P10/20
Inventor 谭春波
Owner 湖南天泰天润新能源科技有限公司
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