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Silicon-calcium phosphate ore reverse flotation, desilicification and decontamination combined collector, and preparation method and application thereof

A combined collector and reverse flotation desiliconization technology, which is applied in flotation, solid separation, etc., can solve the problems of unpublished flotation foam improvement, not enough environmental protection and economy, complicated preparation, etc., and meet the requirements of flotation conditions. High efficiency, saving dosage, good foam fluidity

Inactive Publication Date: 2019-08-23
WENGFU (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, domestic research on phosphate rock reverse flotation desiliconization collectors is mainly based on aliphatic amines and ether amines, but there have been several common problems: 1) Sensitive to ore slime, poor resistance to hard water, and large consumption; 2) The flotation foam has high viscosity and poor selectivity; 3) Tailings are difficult to defoam, have poor fluidity, and cannot be industrialized; 3) The cost of synthetic raw materials is high, the preparation is complicated, and it is not environmentally friendly and economical
However, this patent does not disclose the improvement of the actual flotation froth and in the examples only relates to P 2 o 5 The grade is 23.46%, SiO 2 A single actual mineral grading 24%, also concentrate SiO not given 2 Index and removal effect
In addition, among the newly published patented technologies of cationic desiliconization collectors, few of them involve the practical application of the combination of cationic collectors and anionic surfactants

Method used

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  • Silicon-calcium phosphate ore reverse flotation, desilicification and decontamination combined collector, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 20 parts of a mixture of octadecyl dimethyl tertiary amine acetate and dodecyl dimethyl tertiary amine acetate 1:1 (w / w), 30 parts of dodecyl dimethyl benzyl ammonium chloride Parts, 30 parts of sodium dodecyl sulfate (SDS), 20 parts of n-octanol were added to water whose weight was 49 times the total weight of the above substances, and then stirred for 20 minutes in a water bath at 50°C to obtain the mass percent Combined collector for desiliconization with a concentration of 2.0%.

[0026] For a low-grade silicon-calcium phosphate rock in Guizhou, raw ore P 2 o 5 Grade 17.11%, MgO grade 7.21%, SiO 2 Grade 16.16%. The raw ore is crushed to -1mm and then rod milled to -0.074mm, accounting for 70%, and the slurry is adjusted to a mass concentration of 28%. During one-stage roughing demagnesification, the pH value of the slurry solution is adjusted to 5.0 with industrial acid wastewater WFS, and then the conventional anion collector WF-01 is added in an amount of 400g...

Embodiment 2

[0028] 25 parts of a mixture of dodecyl dimethyl tertiary amine acetate and tetradecyl dimethyl tertiary amine acetate 1:1 (w / w), dodecyl dimethyl benzyl ammonium chloride Add 35 parts, 25 parts of sodium dodecyl sulfate (SDS), and 15 parts of myristyl alcohol into water whose weight is 99 times the total weight of the above substances, and then stir for 30 minutes in a water bath at a temperature of 60 ° C to prepare a mass of 100 A combined collector for desiliconization with a concentration of 1.0%.

[0029] According to the one-time roughing and demagnesification process in the above-mentioned Example 1, the high-silicon rough concentrate is obtained, and the rough concentrate is desiliconized in two stages, and the solution is first adjusted to pH = 7.0 with sodium carbonate, and the first desiliconization Add 250g / t of the combined collector of the present invention, add 150g / t for the second time, maintain the temperature of the whole system at 19°C, and obtain P 2 o ...

Embodiment 3

[0031] 30 parts of a mixture of dodecyl dimethyl tertiary amine acetate and dodecyl dimethyl tertiary amine acetate 1:1 (w / w), tetradecyl dimethyl benzyl ammonium chloride Add 30 parts, 20 parts of sodium dodecyl sulfate (SDS), and 20 parts of stearyl alcohol into water whose weight is 79 times the total weight of the above substances, and then stir for 25 minutes in a water bath at 70°C to obtain a mass of 100 A combined collector for desiliconization with a concentration of 1.25%.

[0032]According to the one-time roughing and demagnesification process in the above-mentioned Example 1, the high-silicon rough concentrate is obtained, and the rough concentrate is desiliconized in two stages, and the solution is first adjusted to pH=8.0 with sodium carbonate, and the first desiliconization Add 300g / t of the combined collector of the present invention, add 200g / t for the second time, maintain the temperature of the whole system at 22°C, and obtain P 2 o 5 Grade 33.79%, MgO gra...

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Abstract

The invention discloses a silicon-calcium phosphate ore reverse flotation, desilicification and decontamination combined collector and a preparation method thereof. The collector comprises, by weight,20-30 parts of tertiary amine acetate, 30-40 parts of a quaternary ammonium salt, 15-30 parts of sodium dodecyl sulfate (SDS) and 10-25 parts of an alcohol foam regulator. The preparation method comprises the following steps: 1) mixing the above raw materials in proportion; and 2) adding water having a weight 49-99 times the total weight of a product obtained in step 1), and performing sufficientstirring in a water bath to prepare the collector. The collector of the invention has the advantages of wide sources of the raw materials, low price, strong collecting ability, low dosage, strong resistance to hard water, good selectivity and good index of a concentrate product, and is suitable for flotation desilicification of silicon-calcium phosphate ores. The collector has the advantages of simple preparation process, brittle flotation desilicification foam and good fluidity, and can realize high-efficiency flotation decontamination in a low-temperature mining area environment and at a pHvalue of a pulp solution of 6-9.

Description

technical field [0001] The invention belongs to the technical field of mineral flotation, in particular to a collector for reverse flotation desiliconization and impurity removal of silicon-calcium phosphate rock and its preparation method and application. Background technique [0002] Phosphate rock is an important chemical mineral raw material for the production of phosphoric acid, phosphate fertilizer and other phosphorus products. It is also the material basis of fine phosphorus chemical industry. It occupies an important position and role in national economic and social development, and is irreplaceable and non-renewable. With the continuous development of rich ore and easy-to-select phosphate rock resources, the scarcity of domestic phosphate rock resources has become increasingly apparent. Accelerating the full and reasonable utilization of lean and refined phosphate rock resources has far-reaching significance for the sustainable development of my country's phosphate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/018B03D101/02B03D103/06
CPCB03D1/018B03D2201/02B03D2203/06
Inventor 徐伟田言胡国涛秦红李会勇陈跃杨丽萍解田刘松林
Owner WENGFU (GRP) CO LTD