Wolframite and scheelite beneficiation process

Abstract

The invention discloses a wolframite and scheelite beneficiation process comprising the steps: carrying out bulk flotation on wolframite and scheelite by using a chelating collector to obtain wolframite and scheelite roughing concentrate, carrying out primary concentration on the roughing concentrate, carrying out secondary concentration on the concentrate after primary concentration to obtain secondary concentration concentrate which is wolframite and scheelite mixed roughing concentrate, and returning tailings after secondary concentration to primary concentration; carrying out primary scavenging operation on roughing tailings, carrying out secondary scavenging on tailings obtained after primary scavenging, enabling concentrates obtained after primary scavenging to return to roughing operation, enabling concentrates obtained after secondary scavenging to return to primary scavenging operation, enabling tailings obtained after secondary scavenging to enter fluorite flotation, and sorting scheelite and wolframite mixed rough concentrates through a high-gradient strong magnetic machine; and concentrating and then heating a non-magnetic product of the high-gradient strong magnetic machine to concentrate floating scheelite, dividing heating concentration into one-time roughing, three-time concentration and three-time scavenging, enabling middlings to return to a closed-loop process in sequence, and heating concentration tailings to obtain low-degree wolframite concentrate 2. The total recovery rate of the tungsten concentrate is increased, the agent cost is reduced, and the technological process is simplified.

Description

technical field [0001] The invention relates to a beneficiation process, in particular to a beneficiation process of black and white tungsten ore. Background technique [0002] Tungsten minerals mainly include scheelite, wolframite and tungsten blooms; bismuth minerals include bismuthite, natural bismuth, bismuth and orthopedic bismuthite; molybdenum minerals include molybdenite and molybdenite; other metal minerals include yellow Iron ore, magnetite, pyrrhotite, cassiterite, chalcopyrite, etc.; non-metallic minerals include garnet, fluorite, calcite, quartz, hornblende, chlorite and mica, etc.; various useful minerals intercalated The particle size is fine, the minerals are closely symbiotic, and the raw ore is complex and difficult to separate. [0003] The tungsten beneficiation process is as follows: sulfide ore tailings are flotation black and white tungsten with chelating collector, soda ash is used as pH regulator, water glass and aluminum sulfate (4:1) are used as g...

AI Technical Summary

Problems solved by technology

[0005] (1) When floating black and white tungsten, the optimal pH value of black and white tungsten flotation is not the same, it is difficult to take into account effectively;

[0006] (2) During tungsten beneficiation, wolframite suppressed by a large amount of water glass is difficult to activate, and the recovery rate of wolframite in the beneficiation operation is low;

[0007] (3) The structure of the beneficiation process is complex;

[0008] (4) There are many types of tungsten flotation reagents, large dosage, high price and high cost of reagents

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