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Application of cationic etherified starch in scheelite flotation

A cationic etherification and scheelite technology, applied in flotation, solid separation, wet separation, etc., can solve the problems of poor quality of flotation concentrate, complicated process, low effective recovery rate, etc., and achieve low environmental pollution , Wide range of sources, easy to degrade effect

Active Publication Date: 2019-07-23
JIANGXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the problems of poor flotation concentrate quality, low effective recovery rate, complex process flow and high flotation cost of complex refractory scheelite ores containing calcite, fluorite, quartz, etc. at present, the selection inhibitor used in the flotation of the present invention (based on common Starch and 3-chloro-2-hydroxypropyltrimethylammonium chloride are prepared as raw materials, referred to as "cationic etherified starch"), which can inhibit the flotation of scheelite and significantly increase the concentration of fluorite, calcite, and aluminosilicate Equal the difference in floatability between gangue minerals and scheelite minerals, realize the reverse flotation separation of gangue minerals and scheelite minerals, and solve the problem of difficult separation of scheelite minerals from calcite, fluorite, aluminosilicate minerals and other gangue minerals

Method used

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  • Application of cationic etherified starch in scheelite flotation
  • Application of cationic etherified starch in scheelite flotation
  • Application of cationic etherified starch in scheelite flotation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The flotation test was carried out with XFGⅡ type hanging tank flotation machine. First, 2g of pure minerals were added to the flotation tank, and then 35ml of distilled water was added, and the pulp was adjusted for 1min. The cationic etherified starch inhibitor was stirred for 3 minutes, the sodium oleate 60 mg / L was stirred for 3 minutes, and then scraped for 4 minutes. After the flotation test, the foam product is filtered, dried, weighed, assayed and the recovery rate calculated.

[0026] The test results of Example 1 are shown in Table 1.

[0027] Table 1 Experimental results of the inhibitory behavior of cationic etherified starch on minerals 1 (pH=7)

[0028]

Embodiment 2

[0030] The flotation test was carried out with XFGⅡ type hanging tank flotation machine. First, add 2g of pure minerals to the flotation tank, then add 35ml of distilled water, adjust the slurry for 1min, adjust the pH of the slurry to 9 with NaOH and stir for 2min, then add a certain amount of cations in turn The etherified starch inhibitor was stirred for 3 minutes, the sodium oleate 60 mg / L was stirred for 3 minutes, and then scraped for 4 minutes. After the flotation test, the foam product is filtered, dried, weighed, assayed and the recovery rate calculated.

[0031] Under the condition of pH=9, the inhibitory effects of cationic etherified starch on fluorite, calcite and scheelite are shown in Table 2.

[0032] Table 2 Experimental results of the inhibitory behavior of cationic etherified starch on minerals 2 (pH=9)

[0033]

Embodiment 3

[0035] The flotation test was carried out with XFGⅡ type hanging tank flotation machine. First, 2g of pure minerals were added to the flotation tank, and then 35ml of distilled water was added, and the slurry was adjusted for 1min. The cationic etherified starch inhibitor was stirred for 3 minutes, the sodium oleate 60 mg / L was stirred for 3 minutes, and then scraped for 4 minutes. After the flotation test, the foam product is filtered, dried, weighed, assayed and the recovery rate calculated.

[0036] Under the condition of pH=12, the inhibitory effects of cationic etherified starch on fluorite, calcite and scheelite are shown in Table 3.

[0037] Table 3 Experimental results of the inhibitory behavior of cationic etherified starch on minerals 3 (pH=12)

[0038]

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Abstract

The invention relates to an ore dressing technology, in particular to application of cationic etherified starch in scheelite flotation. According to the application, a used depressing agent cationic etherified starch can inhibit scheelite flotation, the floatable difference of gangue minerals such as fluorite, calcite and aluminosilicate and scheelite is remarkably improved, reverse flotation separation of the gangue minerals and the scheelite is achieved, and the problem of difficult separation of the scheelite and the gangue minerals such as fluorite, calcite and aluminosilicate is solved. The used depressing agent is conductive to the improvement of scheelite concentrate grade and recovery rate, a flotation process is shortened, the production cost is reduced, and the comprehensive resource utilization level is improved.

Description

technical field [0001] The invention relates to mineral processing technology, in particular to the application of cationic etherified starch in scheelite flotation. Background technique [0002] my country's scheelite reserves are large, but most of them are of low grade, more than 80% of which are ≤0.4%, and the mineral composition is complex, and the embedded particle size is relatively fine. It is mainly associated with non-ferrous metals and precious metals, and some gangue minerals are associated with The buoyancy of scheelite is very close, resulting in the difficulty of sorting, poor concentrate quality, and low recovery rate in most scheelite in my country. The main beneficiation methods of scheelite are gravity separation and flotation. The gravitational separation method is used to process the scheelite with coarse particle size, and the flotation method is used to separate the fine-grained scheelite. The scheelite flotation process usually includes a roughing se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03D1/008B03D101/06B03D103/02
Inventor 余新阳王强强王礼平王浩林黄志强胡琳琪廖晓峰
Owner JIANGXI UNIV OF SCI & TECH
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