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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, only 72.05%, resulting in a large amount of heating for selection, high labor intensity for workers, and energy consumption for heating and selection very high

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

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Embodiment Construction

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

[0020] The invention provides a high-calcium and low-grade scheelite flotation method at normal temperature, which can greatly improve the grade and recovery rate of tungsten concentrate obtained from scheelite flotation at normal temperature, reduce the amount of ore fed to the selection and heating operation, and reduce the labor of workers. Labor intensity, while saving energy and reducing consumption, please refer to figure 1 , including mine feeding;

[0021] Further, the specific process flow is:

[0022] S1: Scheelite normal temperature flotation feeding ore grinding fineness is -200 mesh, accounting for 70%, using one roughing, two beneficiation, three sweeping, closed-circuit middle ore return process in sequence;

[0023] S2:...

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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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