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, low effective recovery rate, complicated process, etc., and achieve low environmental pollution , easy to degrade, and a wide range of sources

Active Publication Date: 2018-01-30

JIANGXI UNIV OF SCI & TECH

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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 star...

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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.

Application Domain

FlotationWet separation

Technology Topic

CalciteScheelite +5

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Examples

Experimental program(5)

Example Embodiment

[0024] Example 1:

[0025] The flotation test was carried out with XFGⅡ 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 slurry pH to 7 with HCl and stir for 2min, then add a certain amount of The cationic etherified starch inhibitor was stirred for 3 minutes, sodium oleate 60mg/L was stirred for 3 minutes, and then bubbled for another 4 minutes. After the flotation test is over, the foam product is filtered, dried, weighed, tested and the recovery rate calculated.

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

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

[0028]

[0029]

Example Embodiment

[0030] Example 2:

[0031] The flotation test is carried out by XFGⅡ 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 slurry pH to 9 with NaOH and stir for 2min, then add a certain amount of cations in sequence The etherified starch inhibitor was stirred for 3 minutes, sodium oleate 60mg/L was stirred for 3 minutes, and then bubbled for another 4 minutes. After the flotation test is over, the foam product is filtered, dried, weighed, tested and the recovery rate calculated.

[0032] Under the condition of pH=9, the inhibitory effects of cationic etherified starch on fluorite, calcite and scheelite are shown in Table 2.

[0033] Table 2 Experimental results of inhibitory behavior of cationic etherified starch on minerals 2 (pH=9)

[0034]

Example Embodiment

[0035] Example 3:

[0036] The flotation test is carried out by XFGⅡ 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 slurry pH to 12 with HCl and stir for 2min, then add a certain amount of The cationic etherified starch inhibitor was stirred for 3 minutes, sodium oleate 60mg/L was stirred for 3 minutes, and then bubbled for another 4 minutes. After the flotation test is over, the foam product is filtered, dried, weighed, tested and the recovery rate calculated.

[0037] Under the condition of pH=12, the inhibitory effects of cationic etherified starch on fluorite, calcite and scheelite are shown in Table 3.

[0038] Table 3 Experimental results of inhibitory behavior of cationic etherified starch on minerals 3 (pH=12)

[0039]

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Improve grade and recovery

Application of cationic etherified starch in scheelite flotation

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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