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The beneficiation method of tungsten-containing tin 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: 2021-08-03
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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  • The beneficiation method of tungsten-containing tin concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] use as figure 1 The beneficiation device shown is for beneficiation of tungsten-containing tin concentrate. specifically:

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

[0059] element sn WO 3

Mo CaO Fe S P As SiO 2

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

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

[0061] The prepared slurry continuously enters 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 this period, the residence time of the...

Embodiment 2

[0065] use as figure 1 The beneficiation device shown is for beneficiation of tungsten-containing tin concentrate. specifically:

[0066] The specific elemental analysis of tungsten-containing tin concentrate is the same as in Example 1, and the treatment process is as follows:

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

[0068] The prepared slurry continuously enters 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 this period, the residence time of the slurry in the pressure leaching tank was 4 hours, the leaching temperature was 220° C., and the leaching press...

Embodiment 3

[0072] use as figure 1 The beneficiation device shown is for beneficiation of tungsten-containing tin concentrate. specifically:

[0073] The specific elemental analysis of tungsten-containing tin concentrate is the same as in Example 1, and the treatment process is as follows:

[0074] Put the tungsten-containing tin concentrate into the mixing tank at a speed of 500kg / h through the screw conveyor, and at the same time add sodium carbonate at a feeding speed of 25kg / h, and add industrial water at a speed of 350kg / h to prepare the slurry under stirring;

[0075] The prepared slurry continuously enters 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 this period, the residence time of the slurry in the pressure leaching tank is 1 h, the leaching temperature is 160° C., and the leaching pressure is 0.6 MPa. During the leaching reaction, the generated non-condensable gas mixe...

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Abstract

The invention provides a beneficiation method of tungsten-containing tin concentrate. The method comprises: using soluble carbonate or sodium hydroxide as a leaching agent, carrying out pressurized leaching of tungsten-containing tin concentrate in an alkali decomposition unit to obtain leached pulp; using a flash unit to perform flash treatment on the leached pulp to obtain concentrated slurry; and using a filter unit to filter the concentrated slurry to obtain tin concentrate and filtrate. The mineral processing method provided by the invention can improve the quality stability of tin concentrate and subsequent filtrate to prepare scheelite, and the recovery rates of tin and tungsten are both high.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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