Normal-temperature flotation method for high-calcium low-grade scheelite

A low-grade, scheelite technology, applied in the field of scheelite, can solve the problems of low grade of scheelite flotation concentrate at room temperature, high energy consumption for heating and selection, and high labor intensity of workers. Significant effects of ore feeding in warm operation, improvement of grade and recovery rate, energy saving and consumption reduction

Pending Publication Date: 2022-04-19
HUNAN SHIZHUYUAN NON FERROUS METAL
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Problems solved by technology

[0003] The existing scheelite normal temperature flotation concentrate grade is low, only 1.53%, and the recovery rate of tungsten concentrate operation is low,

Method used

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  • Normal-temperature flotation method for high-calcium low-grade scheelite

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[0019] To make the object, technical solution and advantages of the present invention more clear, the following will be combined with the accompanying drawings of embodiments of the present invention will be further described in detail.

[0020] The present invention provides a high-calcium low-grade white tungsten ore normal temperature flotation method, having greatly improved the grade and recovery rate of tungsten concentrate obtained by white tungsten normal temperature flotation, reducing the amount of ore feed for selected heating operations, reducing the labor intensity of workers, while saving energy and reducing significant advantages, see Figure 1 , including feedstock;

[0021] Further, the specific process flow is:

[0022] S1: The fineness of white tungsten normal temperature flotation for ore grinding is -200 mesh, accounting for 70%, using one rough separation, two selections, three sweeping, and the sequence return process of closed-circuit ore;

[0023] S2: Afte...

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Abstract

The invention belongs to the technical field of scheelite, and particularly relates to a high-calcium low-grade scheelite normal-temperature flotation method which comprises feeding, and the specific technological process comprises the steps that S1, scheelite normal-temperature flotation feeding ore with the grinding fineness of-200 meshes accounts for 70%, and the flow of one-time roughing, two-time concentration, three-time scavenging and closed-loop middling sequential returning is adopted; s2, after feeding, roughing under a medicament condition: selecting 750-1000 g/t of Na2CO3, 150-200 g/t of NaOH, 4000-5000 g/t of water glass, 1000-1250 g/t of aluminum sulfate and 260-320 g/t of ZL; s3, first selection is conducted, 400-600 g/t of water glass and 100-150 g/t of aluminum sulfate are selected, and second selection is blank selection; s4, first scavenging is conducted, 30-40 g/t of ZL is selected, second scavenging is conducted, 10-20 g/t of ZL is selected, and third scavenging is blank scavenging; the method has the beneficial effects that the grade and the recovery rate of scheelite normal-temperature flotation concentrate are improved by developing a regulator combined system with a stronger selective inhibition effect on gangue such as calcite and fluorite, the subsequent heating ore quantity is reduced, and energy conservation and consumption reduction are realized.

Description

technical field [0001] The invention relates to the technical field of scheelite, in particular to a normal-temperature flotation method for high-calcium and low-grade scheelite. Background technique [0002] A high-calcium and low-grade complex tungsten-molybdenum-bismuth fluorite polymetallic mine, the raw ore has been ground in two stages and two closed circuits to -200 mesh, accounting for about 82%, and flotation is being carried out to recover tungsten, molybdenum, bismuth, fluorite, etc., and its beneficiation process The main process is molybdenum bismuth flotation - bismuth sulfur mixed flotation - magnetic separation iron removal - scheelite normal temperature flotation - fluorite flotation, in which the scheelite normal temperature flotation concentrate is heated and selected after concentration, heated flotation The concentrated ore is then leached with hydrochloric acid to obtain the final scheelite concentrate. The normal temperature flotation of scheelite adop...

Claims

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Application Information

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IPC IPC(8): B03D1/001B03D1/02B03D101/02B03D103/02
CPCB03D1/001B03D1/025B03D2201/02B03D2203/02
Inventor 王小生龙冰何斌全黄春海
Owner HUNAN SHIZHUYUAN NON FERROUS METAL
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