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A kind of beneficiation method for recovering wolframite from tailings
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A mineral processing method and wolframite technology, which is applied in the mineral processing field of wolframite recovery, can solve the problems of low comprehensive recovery rate of tungsten ore, small processing capacity, and large dosage of chemicals, so as to improve the separation index, increase the selected grade, The effect of reducing the cost of beneficiation
Active Publication Date: 2019-01-11
JIANGXI UNIV OF SCI & TECH
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Problems solved by technology
The first is the gravity separation process, which has an unsatisfactory effect on the recovery of fine-grained wolframite in the tailings, with small processing capacity and low recovery rate; The interference of magnetic minerals and sulfide ores in the process leads to long sorting process, large dosage of chemicals, and low grade wolframite concentrate. At present, there is no mature technology in the mineral processing field to break through the bottleneck of efficient recovery of fine-grained wolframite in tailings. , leading to low comprehensive recovery rate of tungsten ore sorted by this method
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Embodiment 1
[0029] WO contained in black tungsten tailings in Ganzhou, Jiangxi 3 0.085%, -0.074mm in the tailings accounted for 78%, containing wolframite, chalcopyrite, pyrite, mica, quartz, etc. Iron - high gradient magnetic separation - shaker gravity separation - black tungsten flotation" process, can obtain WO containing 3 52.23%, wolframite concentrate with a recovery rate of 55.30%, the results of Example 1 are shown in Table 1, and the process conditions and parameters are shown in Table 2.
[0030] The beneficiation result of table 1 embodiment 1
[0031] name
Yield
grade
Recovery rate
Centrifugal gravity separation tailings
68.84
0.032
25.92
Sulfide Ore Flotation Concentrate
8.83
0.038
3.95
Magnetic Concentrate
1.88
0.029
0.64
High Gradient Magnetic Separation Tailings
15.98
0.041
7.71
Wolfram flotation tailings
4.38
0.125
6.48
Wolframite Concentrate
0.09
52.23
...
Embodiment 2
[0036] WO contained in a black tungsten tailings in Fujian 3 0.095%, -0.074mm in the tailings accounts for 81%. The main minerals in the tailings are wolframite, magnetite, chalcopyrite, pyrite, molybdenite, calcite, mica, quartz, etc., using "centrifugal rich Integrating tailings - sulfide ore flotation - magnetic separation iron removal - high gradient magnetic separation - shaker gravity separation - black tungsten flotation" process, can obtain WO-containing 3 53.16%, wolframite concentrate with a recovery rate of 55.96%, the results of Example 2 are shown in Table 3, and the process conditions and parameters are shown in Table 4.
[0037] The beneficiation result of table 3 embodiment 2
[0038] name
Yield
grade
Recovery rate
Centrifugal gravity separation tailings
67.82
0.033
23.56
Sulfide Ore Flotation Concentrate
8.86
0.045
4.20
Magnetic Concentrate
2.03
0.048
1.03
High Gradient Magnetic Sep...
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Abstract
The invention discloses a mineral separation method for recycling wolframite from a tailing. The mineral separation method comprises the following steps that (1) gravity separation of a centrifugal machine is conducted for tailing discarding and preenrichment; (2) sulphide ore flotation is conducted; (3) magnetic separation is conducted and magnetic impurities are removed; (4) high-gradient magnetic separation is conducted for wolframite enrichment; (5) tabling gravity separation is conducted to obtain coarse grained wolframite; and (6) flotation is conducted to obtain fine grained wolframite. By means of centrifugation gravity separation preenrichment, the separation grade of the wolframite is improved, the ore feeding quantity and the mud content of wolframite separation are reduced, and flotation reagent dosage is saved. By means of the sulphide ore flotation and magnetic separation iron removal, the disturbance of sulphide minerals and magnetic minerals on wolframite separation is reduced. According to the mineral separation characteristics of the wolframite, the separation index of the wolframite is improved by adopting the high-gradient magnetic separation and the coarse grained and fine grained wolframite grading and separation process. Efficient recycling of the wolframite in low-grade wolframite tailing resources is achieved, and the mineral separation method is environmentally friendly, efficient and energy saving, and suitable for application and popularization.
Description
technical field [0001] The invention belongs to the field of mineral processing, in particular to a mineral processing method for recovering wolframite from black tungsten tailings. Background technique [0002] China is rich in tungsten resource reserves and is the country with the most abundant tungsten resources in the world, accounting for about 40% of the total reserves. It is a dominant mineral resource, but tungsten ore is brittle, easy to be crushed, and produces fine mud, and most of them are embedded with fine particle size. There are many associated useful metal minerals, gangue minerals and tungsten minerals have a close symbiotic relationship, and separation is difficult. Many fine-grained tungsten cannot be recovered and form tailings. According to statistics, 1 / 5 of the world's tungsten-containing minerals are lost in the form of fine particles. Fundamentally speaking, this loss should be attributed to the difficulty of effectively sorting and recycling fine-...
Claims
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