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A kind of hematite reverse flotation desiliconization method

A reverse flotation desiliconization and hematite technology, applied in flotation, solid separation, etc., can solve the problems of poor fluidity and selectivity, inconvenient reagent preparation, and low flotation efficiency, and achieve strong acid-base adaptability, Ease of defoaming and high selectivity

Active Publication Date: 2020-08-21
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current common cationic collectors have disadvantages such as inconvenient reagent preparation (need to add acid), low flotation efficiency, high foam viscosity, poor fluidity and selectivity; while quaternary ammonium salt collectors are similar to inorganic salts. High solubility in water, usually lower toxicity than amines, low corrosion, low price and other characteristics, it has been widely used in daily chemical industry, water treatment, food and even medical and health fields

Method used

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  • A kind of hematite reverse flotation desiliconization method
  • A kind of hematite reverse flotation desiliconization method
  • A kind of hematite reverse flotation desiliconization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 5.0g of the prepared ore sample and put it into the flotation cell, add water to adjust the pulp concentration to 30%; use a hanging tank flotation machine for flotation, first stir and adjust the slurry for 2min, at room temperature (25°C), in the pulp Under natural pH conditions (pH about 7.50), add collector 15 mg / L dodecylmethyldihydroxyethyl ammonium chloride, stir for 2 minutes and then carry out flotation. The flotation time is 5 minutes. After the flotation, the foam product and the product in the tank were dried and weighed respectively, and the test grade was sampled, and the recovery rate was calculated, wherein the product in the tank was concentrate, and the TFe grade in the reverse flotation concentrate was 66.50%. Up to 86.40%.

Embodiment 2

[0036] Weigh 5.0g of prepared ore sample into the flotation cell, add water to adjust the pulp concentration to 30%; use hanging tank flotation machine for flotation, first stir the slurry for 2min, at room temperature (25°C), in the pulp Under natural pH conditions (pH is about 7.50), add 4mg / L starch, stir for 1min, add 15mg / L dodecylmethyldihydroxyethylammonium chloride, stir for 2min, then carry out flotation, and the flotation time is 5min. After the flotation, the foam product and the product in the tank were dried, weighed, sampled to test the grade, and the recovery rate was calculated. Among them, the TFe grade in the reverse flotation concentrate was 66.78%, and the recovery rate could reach 93.30%.

Embodiment 3

[0041] Weigh 5.0g of the prepared ore sample and put it into the flotation tank, add water to adjust the pulp concentration to 30%; use a hanging tank flotation machine for flotation, first stir the slurry for 2 minutes, and under the condition of 10°C, in the natural pulp Under pH conditions, add 4 mg / L starch, stir for 1 min, then add collector 15 mg / L dodecylmethyldihydroxyethyl ammonium chloride, stir for 2 min, then carry out flotation, and the flotation time is 5 min. After the flotation, the foam product and the product in the tank were dried, weighed, sampled to test the grade, and the recovery rate was calculated. Among them, the TFe grade in the reverse flotation concentrate was 66.51%, and the recovery rate could reach 89.07%.

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Abstract

The invention relates to a hematite reverse flotation desiliconization method and belongs to the technical field of mineral flotation separation. A hematite reverse flotation desiliconization method. Other hematite ore samples to be selected are mixed and stirred evenly with water to obtain a slurry. Under the natural pH value of the slurry, the collector is added; optionally, an inhibitor is added. Agent, reverse flotation and desilication are performed to obtain hematite concentrate product. The method uses quaternary ammonium salt collectors. The application of the above collector in the field of reverse flotation desilication of hematite shows good collection capacity and selectivity. It has the advantages of good solubility, convenient preparation, low temperature resistance, low foam viscosity and low dosage. .

Description

technical field [0001] The invention relates to a hematite reverse flotation desiliconization method, which belongs to the technical field of mineral flotation separation. Background technique [0002] my country's iron ore resource reserves are very rich. However, compared with foreign countries, my country's iron ore resources are poor, fine, and miscellaneous. In recent years, with the extension of mining, the ore grade has decreased year by year, and the degree of refractory selection has continued to increase. In recent years, with the increase of iron ore imports, the dependence on foreign countries has been deepened year by year, which seriously restricts the development of my country's iron and steel industry. [0003] Flotation is a common method for processing low-grade refractory iron ore. The key to the success of flotation depends largely on the use of flotation reagents. Collector is the core of flotation reagents, and its reasonable use is of great significa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/01B03D101/02B03D103/04
CPCB03D1/011B03D2201/02B03D2203/04
Inventor 刘文刚刘文宝赵强王本英张乃旭赵亮
Owner NORTHEASTERN UNIV LIAONING