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Method for separating molybdenum and tungsten from molybdenum-tungsten concentrate

A molybdenum-tungsten and concentrate technology is applied in the field of separating molybdenum and tungsten from molybdenum-tungsten minerals, which can solve the problems of long operation process, large consumption of chemical reagents, and large environmental pollution, and achieves the effect of simple method and small consumption of reagents.

Active Publication Date: 2013-01-09
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the above methods, the precipitation method, ion exchange method and extraction method are mainly used to separate a small amount of molybdenum in tungsten minerals, and need to add a large amount of sulfide or complexing agent, etc., resulting in large environmental pollution and high production costs.
The step-by-step leaching method can selectively leach a large amount of molybdenum minerals in tungsten minerals, but the operation is troublesome, molybdenum and tungsten need to be leached step by step, the operation process is long, and the consumption of chemical reagents is large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] WO 3 6.32%, MoO 3 Mix 100g of 29.86% tungsten-molybdenum concentrate and 12g of petroleum coke evenly, introduce chlorine gas for boiling roasting, the roasting temperature is 550°C, and the roasting time is 7.8 hours. Then add water, stir for 0.6 hours, filter, wash; filtrate 1L, filter cake drying 21g, analysis of molybdenum, tungsten element content in the solution, MoO 3 27.12g / L, WO 3 0.001g / L; WO in filter cake 3 It is 29.08%; the calculated molybdenum yield reaches 90.82%, and the tungsten yield reaches 96.62%.

Embodiment 2

[0013] WO 3 6.32%, MoO 3 Mix 100g of 29.86% tungsten-molybdenum concentrate and 78g of petroleum coke evenly, inject chlorine gas for boiling roasting, the roasting temperature is 950°C, and the roasting time is 0.8 hours. Then add water, stir for 4.6 hours, filter and wash; filtrate 1L, filter cake drying 21.5g, analyze the content of molybdenum and tungsten in the solution, MoO 3 29.42g / L, WO 3 0.001g / L; WO in filter cake 3 It is 29.26%; the calculated molybdenum yield reaches 98.53%, and the tungsten yield reaches 99.54%.

Embodiment 3

[0015] WO 3 26.32%, MoO 3 100g of 19.86% tungsten-molybdenum concentrate and 38g of petroleum coke are mixed evenly, and chlorine gas is introduced to carry out chlorinated molten salt roasting. The roasting temperature is 800°C, and the roasting time is 3.0 hours. Chloride was collected and added to water, stirred for 7.7 hours, filtered and washed; the filtrate was 1L, the filter cake was dried to 100.6g, and the content of molybdenum in the solution was analyzed, MoO 3 19.42g / L; WO in the filter cake 3 It is 25.58%; the calculated molybdenum yield reaches 97.78%, and the tungsten yield reaches 97.77%.

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Abstract

A method for separating molybdenum and tungsten from molybdenum-tungsten concentrate is characterized by including well mixing molybdenum-tungsten concentrate with reducing agent; introducing nitrogen for chloridizing roasting; allowing molybdenum and tungsten to volatilize in chloride form; collecting molybdenum and tungsten chlorides and adding the chlorides into water or dilute hydrochloric acid solution to form tungsten chloride precipitate and molybdenum chloride solution; filtering and cleaning to separate the molybdenum and tungsten. The molybdenum-tungsten concentrate is decomposed by one-step chlorination process, and molybdenum and tungsten are separated by taking the advantage of property difference between the molybdenum chloride and the tungsten chloride. The method can be used to process concentrates different in molybdenum and tungsten content, and has the advantages of simplicity, low reagent consumption and the like.

Description

technical field [0001] The invention relates to a method for separating molybdenum and tungsten from minerals, in particular to a method for separating molybdenum and tungsten from molybdenum-tungsten minerals. Background technique [0002] With the increasing consumption of tungsten and molybdenum element resources, the complex associated tungsten and molybdenum element resources need to be comprehensively developed and utilized. Many associated tungsten and molybdenum element resources exist in the form of homogeneous tungsten and molybdenum. The use of beneficiation methods cannot effectively separate tungsten from molybdenum. Can only rely on metallurgical process for separation. [0003] Zhang Qixiu et al. ("Tungsten and Molybdenum Metallurgy", Metallurgical Industry Press, 2005, P110-198) summarizes the methods currently used in the separation of tungsten and molybdenum metallurgy at home and abroad: 1. Precipitation, molybdenum trisulfide precipitation and selective p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/08C22B3/04C22B34/34C22B34/36
CPCY02P10/20
Inventor 刘志强邱显扬周晓彤郭秋松朱薇
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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