Flotation reagent system for fine wolframite in gravity concentration tailings

A technology for gravity separation of tailings and flotation reagents, applied in flotation, solid separation and other directions, can solve problems such as high toxicity, seriousness, poor selectivity, etc. The effect of improving tungsten grade and tungsten recovery rate

Inactive Publication Date: 2016-02-10
SHENYANG RES INST OF NONFERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fatty acid collectors can also collect wolframite very well, but because of their poor selectivity, they are generally only used in the rough separation of wolframite and need the cooperation of other collectors
Although arsine and phosphonic acid collectors have good selectivity, they are gradually being abandoned because of their high toxicity and serious environmental pollution.

Method used

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  • Flotation reagent system for fine wolframite in gravity concentration tailings
  • Flotation reagent system for fine wolframite in gravity concentration tailings
  • Flotation reagent system for fine wolframite in gravity concentration tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The sample is the gravity separation tailings of Xialong Tungsten Concentrator. The sample mainly contains tungsten, molybdenum, bismuth, sulfur and iron. Through the optical microscope identification of the sample ore, it is found that the content of metal minerals in tungsten fine mud is relatively small, accounting for only 1.91%. The main metal minerals are wolframite, scheelite, pyrite, pyrrhotite, pyrrhotite, Molybdenum ore, bismuthite, etc.; the contents are 0.58%, 0.19%, 0.43%, 0.32%, 0.07%, 0.05% respectively; the content of non-metallic minerals is relatively high, accounting for 98.09%. The chemical multi-element analysis results of the samples are shown in Table 1.

[0020] Table 1 Sample chemical multi-element analysis results (%).

[0021]

[0022] The sample was sieved through four sieves of 0.105mm, 0.075mm, 0.053mm, and 0.038mm to obtain 5 grades of products, and chemical analysis and lump ore inspection were carried out for each grade. According t...

Embodiment 2

[0029] The test sample is the overflow sample of Xialong Tungsten Industry's primary and secondary fine mud concentrated through a thickener, containing WO 3 , Mo, and Bi are 0.747%, 0.108%, and 0.107%, respectively. In the sample, wolframite mainly exists in the form of monomer, accounting for 94.32%, followed by gangue, accounting for 3.36%, and a small part of it is associated with pyrite and limonite. The particle size of wolframite is relatively fine, mainly distributed in the particle size range from -0.037mm to +0.010mm, accounting for 78.43%, see Table 4 for details.

[0030] Table 4 Statistical results of wolframite particle size (%).

[0031]

[0032] The sample contains molybdenum and bismuth with grades of 0.108% and 0.107% respectively. The sulfide is first floated to obtain the mixed concentrate of molybdenum and bismuth, and then molybdenum and bismuth are separated to obtain molybdenum concentrate and bismuth concentrate. The fine-grained wolframite is re...

Embodiment 3

[0036] The sample is a raw material produced by a flotation plant in Dayu, which contains WO 3 0.527% slime. Using the technological process of one roughing, two sweepings, two beneficiations and the flotation agent system of the present invention, the mineral processing technical indicators obtained are shown in Table 6. The main technical parameters are: control the pulp concentration to 34%, add sodium carbonate 450g / t, at this time the pH value of the pulp is 7.8, and the stirring time is 3 minutes; add gangue inhibitor and fine mud dispersant, water glass + CMC cellulose , the dosage is 550g / t, and the stirring time is 5 minutes; the activator lead nitrate of wolframite is added, the dosage is 300g / t, and the stirring time is 5 minutes; the collector is TW-705+auxiliary collector kerosene, The dosage is 550g / t; the foaming agent is terpineol oil, the dosage is 25g / t, and the stirring time is 3 minutes.

[0037] Table 6 Fine Sludge Wolframite Flotation Index (%)

[0038...

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Abstract

A flotation reagent system for fine wolframite in gravity concentration tailings is characterized in that 1, a gravity concentration tailing sample is put into a stirring tank, the concentration of ore pulp is controlled, sodium carbonate is added, the pH value of the ore pulp is controlled, and the mixture is stirred; 2, a gangue inhibitor and a fine silt dispersant are added and stirred; 3, a lead nitrate activator for the wolframite is added and stirred; 4, TW-705 serving as a collecting agent, kerosene serving as an auxiliary collecting agent and terpenic oil serving as a foaming agent are added and stirred; 5, the process flow path of carrying out rough concentration once, concentration twice and scavenging twice is adopted in tungsten flotation, the time for rough concentration is 5 min, the time for first-time scavenging and the time for second-time scavenging are 3 min, sodium silicate, a TW-705 and kerosene mixed collecting agent and terpenic oil are added in first-time scavenging, and the time for first-time concentration and the time for second-time concentration are 3 min and 2 min respectively. Tungsten concentrate is obtained through sorting. The tungsten grade of the fine wolframite in the gravity concentration tailings is improved, the tungsten recovery rate of the fine wolframite in the gravity concentration tailings is increased, and fine-fraction tungsten resources can be efficiently recovered.

Description

technical field [0001] The invention relates to a flotation reagent system for non-ferrous metal ores, in particular to a flotation reagent system for fine-grained wolframite in gravity tailings or fine-grained wolframite in ore washing pulp, and belongs to the technical field of mineral processing. Background technique [0002] The exploitable reserves of black tungsten ore in Jiangxi account for 60% of the national recoverable reserves, which are mainly recovered through gravity separation. In the process of mining, crushing and grinding, the grade of tungsten contained in the primary and secondary fine mud is the same as that of the original ore. Rather, due to the fine particle size of the tungsten minerals in the fine mud and serious mudification, it is difficult to recover the tungsten minerals in the fine mud. The Xialong Tungsten Concentrator currently processes 200,000 tons of raw ore. The fine mud raw ore production rate accounts for 8.04% of Chulong raw ore, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/002B03D101/00B03D103/02
Inventor 马忠臣陈新林于雪杨长颖马延全吕家华
Owner SHENYANG RES INST OF NONFERROUS METALS
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