Scheelite beneficiation method

A mineral processing method and scheelite technology, applied in flotation, solid separation, etc., can solve the problems of large area of ​​concentration equipment, unsuitable for large-scale application, and difficult separation, so as to reduce the amount of concentrated ore and heat the ore Quantity, conducive to large-scale production, and reduce the effect of subsidence area

Active Publication Date: 2015-04-01
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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AI Technical Summary

Problems solved by technology

Because the buoyancy of scheelite is close to that of calcite, fluorite and other calcium-containing minerals, separation is difficult. For scheelite with low tungsten grade, high content of calcite and fluorite, and large daily processing capacity, crude tungsten The amount of concentrated ore entering the concentration is relatively large, resulting in a large production site occupied by the concentration equipment, which is not conducive to large-scale production; due to the need for concentration, heating, dilution, flotation and other processes, the heating method has high ambient temperature and low It is relatively poor, the cost is high, and the process is relatively complicated and difficult to operate
[0004] The normal temperature method is easy to operate, and the coarse scheelite concentrate does not need to be concentrated. For the scheelite-calcite-fluorite type tungsten ore, the normal temperature beneficiation process is adopted, and the tungsten recovery rate is low when obtaining higher-grade tungsten concentrate, especially for For scheelite with low raw ore tungsten grade, high content of calcite and fluorite, and large daily processing capacity, the heating volume of crude scheelite ore concentrate is larger, and the required concentration equipment occupies a larger area, which is not conducive to Large-scale production, and the heating process is complicated and not suitable for large-scale application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Scheelite feed contains WO 3 0.14%, CaCO 3 25.13%, CaF 2 7.8%, its scheelite is tungsten and molybdenum homogeneous scheelite (Ca[(W,Mo)O 4 ], scheelite pure mineral containing WO 3 42.15%).

[0015] 1) Rough selection of scheelite: ① first rough selection: add sodium carbonate, water glass and sulfated oleic acid soap according to the chemical system in Table 1, and stir for 15 minutes; Minutes; ③Third times of sweeping: add sulfated oleic acid soap according to the reagent system in Table 1, and stir for 10 minutes; obtain scheelite rough concentrate and scheelite roughing tailings;

[0016] 2) Pretreatment of rough scheelite concentrate at room temperature: ① 1 roughing: add sodium hydroxide, water glass and sulfated oleic acid soap to scheelite rough concentrate according to the chemical system in Table 1, and stir for 45 minutes; ② 3 times of washing : without adding chemicals, stirring for 5 minutes; ③Third times of sweeping: without adding chemicals, sti...

Embodiment 2

[0019] Scheelite feed contains WO 3 0.062%, CaCO 3 30.12%, CaF 2 16.16%, its scheelite is tungsten and molybdenum homogeneous scheelite (Ca[(W,Mo)O 4 ], scheelite pure mineral containing WO 3 40.15%).

[0020] 1) Rough selection of scheelite: ① 1st rough selection: add sodium hydroxide, water glass and sulfated oleic acid soap according to the chemical system in Table 1, and stir for 10 minutes; ②Third selection: add water glass according to the chemical system in Table 1, and stir 5 minutes; ③2 times of sweeping: add sulfated oleic acid soap according to the chemical system in Table 1, and stir for 5 minutes; obtain scheelite rough concentrate and scheelite roughing tailings;

[0021] 2) Pretreatment of rough scheelite concentrate at room temperature: ① 1 roughing: add sodium hydroxide, water glass and sulfated oleic acid soap to scheelite rough concentrate according to the chemical system in Table 1, and stir for 60 minutes; ② 3 times of washing : without adding che...

Embodiment 3

[0024] Scheelite feed contains WO 3 0.60%, CaCO 3 17.26%, CaF 2 30.30%, the scheelite pure mineral contains iron, and the scheelite pure mineral contains WO 3 73.05%.

[0025] 1) Rough selection of scheelite: ① 1st rough selection: add sodium carbonate, sodium hydroxide, water glass and sulfated oleic acid soap according to the chemical system in Table 1, and stir for 12 minutes; ②Second selection: add water according to the chemical system in Table 1 Glass, stirred for 2 minutes; ③Three times of sweeping: add sulfated oleic acid soap according to the chemical system in Table 1, and stir for 10 minutes; obtain scheelite rough concentrate and scheelite roughing tailings;

[0026] 2) Pretreatment of rough scheelite concentrate at room temperature: ① 1 roughing: add sodium hydroxide, water glass and sulfated oleic acid soap to scheelite rough concentrate according to the chemical system in Table 1, and stir for 30 minutes; ② 2 times of refining : without adding chemicals,...

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Abstract

Disclosed is a scheelite beneficiation method. The scheelite beneficiation method is characterized by sequentially including the following steps of scheelite rough concentration, scheelite rough concentrate normal temperature pretreatment and scheelite pretreatment concentrate heating concentration. As for scheelite rough concentration, according to scheelite ore feeding, one time of rough concentration, two to three times of fine concentrations and two to three times of scavenging are performed to obtain scheelite rough concentrate and scheelite rougher tailings; as for scheelite rough concentrate normal temperature pretreatment, according to scheelite rough concentrate, one time of rough concentration, two to three times of fine concentrations and two to three times of scavenging are performed to obtain scheelite pretreated concentrate and shceelite preheated tailings; as for scheelite pretreatment concentrate heating concentration, scheelite pretreated concentrate is concentrated to 60%-70% in concentration; heating is performed to reach 80 DEG C to 95 DEG C, and according to scheelite pretreated concentrate, one time of rough concentration, two to three times of fine concentrations and two to three times of scavenging are performed to obtain scheelite concentrate and scheelite heated tailings. According to the scheelite beneficiation method, concentrated and heated ore quantities can be reduced, good indicators in beneficiation of scheelite concentrate can be achieved, and the scheelite beneficiation method is applicable to flotation of scheelite in which the WO3 content is 0.06%-0.85%, the CaCO3 content is larger than or equal to 10% and CaF2 content is larger than or equal to 5%.

Description

technical field [0001] The invention relates to a beneficiation method, in particular to a beneficiation method of scheelite minerals. Background technique [0002] Scheelite usually coexists with calcium-containing gangue minerals such as calcite and fluorite. For CaCO 3 ≥10%, CaF 2 ≥5% scheelite-calcite-fluorite type tungsten ore is difficult to separate by flotation. According to different ore types, scheelite can be divided into two types: scheelite-quartz (or silicate mineral) type and scheelite-calcite-fluorite type. Scheelite-quartz (or silicate mineral) type tungsten ore is easier to recycle, while scheelite-calcite-fluorite type tungsten ore is more difficult to recycle, mainly because scheelite and its symbiotic calcium-containing gangue minerals have similar buoyancy . The flotation of scheelite is roughly divided into two parts: roughing and beneficiation. The main goal of the roughing section is to maximize the recovery rate of scheelite, and the goal of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/012
Inventor 周晓彤邓丽红付广钦关通
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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