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Beneficiation method for tungsten-tin-containing concentrate

A beneficiation method and concentrate technology are applied in the field of beneficiation of tungsten-tin concentrates, which can solve problems such as unstable product quality.

Active Publication Date: 2019-12-03
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a method for beneficiation of tungsten-containing tin concentrate to solve the problem of unstable product quality in the prior art when tungsten-containing tin concentrate is leached with sodium hydroxide or soluble carbonate under pressure. question

Method used

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  • Beneficiation method for tungsten-tin-containing concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] using as figure 1 The beneficiation unit shown is for beneficiation of tungsten-containing tin concentrates. specifically:

[0058] The main components of tungsten-containing tin concentrate are analyzed as follows:

[0059] element Sn WO 3

Mo CaO Fe S P As SiO 2

MgO Content wt% 34.75 9.54 0.40 14.92 6.39 0.33 0.04 0.68 1.89 0.25

[0060] The tungsten-tin concentrate was put into the ball mill at a speed of 500kg / h through a screw conveyor, and at the same time, industrial water was added to the ball mill at a speed of 250L / h for wet ball milling to make abrasives; Add sodium carbonate at a feeding speed of / h, add industrial water at a speed of 75kg / h, and mix slurry under stirring;

[0061] The prepared slurry is continuously fed into the pressure leaching tank at a flow rate of 865kg / h, and the leaching reaction is carried out under the state of stirring and electric heating. During the period, the residence ...

Embodiment 2

[0065] using as figure 1 The beneficiation unit shown is for beneficiation of tungsten-containing tin concentrates. specifically:

[0066] The concrete element analysis of tungsten-containing tin concentrate is the same as in Example 1, and the processing technique is as follows:

[0067] The tungsten-containing tin concentrate is put into the ball mill at a speed of 500kg / h through a screw conveyor, and industrial water is added to the ball mill at a speed of 1000L / h for wet ball milling to make abrasives; Add sodium carbonate at a feeding speed of / h, add industrial water at a speed of 150kg / h, and mix slurry under stirring;

[0068] The prepared slurry is continuously fed into the pressure leaching tank at a flow rate of 1950kg / h, and the leaching reaction is carried out under the state of stirring and electric heating. During the period, the residence time of the slurry in the pressure leaching kettle was 4h, the leaching temperature was 220°C, and the leaching pressure...

Embodiment 3

[0072] using as figure 1 The beneficiation unit shown is for beneficiation of tungsten-containing tin concentrates. specifically:

[0073] The concrete element analysis of tungsten-containing tin concentrate is the same as in Example 1, and the processing technique is as follows:

[0074] The tungsten-containing tin concentrate is put into the slurry tank at a speed of 500kg / h through a screw conveyor, and at the same time, sodium carbonate is added at a speed of 25kg / h, and industrial water is added at a speed of 350kg / h.

[0075] The prepared slurry is continuously fed into the pressure leaching tank at a flow rate of 875kg / h, and the leaching reaction is carried out under the state of stirring and electric heating. During the period, the residence time of the slurry in the pressurized leaching kettle was 1 h, the leaching temperature was 160 °C, and the leaching pressure was 0.6 MPa. During the leaching reaction, the generated non-condensable gas mixed with part of the h...

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Abstract

The invention provides a beneficiation method for tungsten-containing tin concentrate. The method comprises the steps that soluble carbonate or sodium hydroxide is adopted as a leaching agent, pressure leaching is conducted on the tungsten-containing tin concentrate in an alkali decomposition unit, and leached ore pulp is obtained; the flash evaporation treatment is carried out on the leached orepulp by adopting a flash evaporation unit to obtain concentrated pulp; and the concentrated slurry is filtered by adopting a filtering unit to obtain tin concentrate and filtrate. According to the beneficiation method, the quality stability of scheelite prepared from tin concentrate and subsequent filtrate can be improved, and the recovery rate of tin and tungsten is high.

Description

technical field [0001] The invention relates to the technical field of beneficiation, in particular to a beneficiation method for tungsten-containing tin concentrate. Background technique [0002] The abundance of tungsten in the earth's crust is 1.1 × 10 -6 , The tungsten-containing minerals with the largest industrial value and the largest reserves have been discovered in the world today are wolframite and scheelite. With the mining and consumption of high-quality wolframite and high-grade scheelite resources for many years, low-grade scheelite associated with cassiterite (tungsten-tin concentrate) has gradually entered the research field, and the existing technology is difficult to effectively combine the two separation. [0003] The existing methods for separating and extracting tungsten from tungsten-containing tin concentrates mainly include acid decomposition method, soluble carbonate sintering-water leaching method and sodium hydroxide pressure leaching method, and...

Claims

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Application Information

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IPC IPC(8): C22B3/12C22B3/02C22B3/22C22B34/36C22B25/00
CPCC22B3/02C22B3/12C22B3/22C22B25/04C22B34/36Y02P10/20
Inventor 邱爽杜国山周文龙汪德华桑园李少华
Owner CHINA ENFI ENGINEERING CORPORATION
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