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Silica-calcia bearing phosphate rock normal temperature direct flotation collecting agent and preparation method thereof

A technology of colloid ore and positive flotation, which is applied in flotation, solid separation, etc., can solve the problems of large dosage of chemicals, unsatisfactory flotation effect at room temperature, and weak collection capacity of flotation pulp heating treatment, etc., to achieve The effect of good solubility, simple synthesis process and wide sources

Inactive Publication Date: 2015-07-01
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to the reasons of reagent cost and environmental protection, the main reason is that the room temperature flotation effect of these reagents is not ideal, the flotation pulp must be heated and the collection capacity is not strong, and the dosage of reagents is large.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of preparation method of normal temperature positive flotation collector of siliceous calcareous colloidal phosphate rock, the specific preparation steps are as follows:

[0027] Step 1, by mass ratio: 100 parts of vegetable fatty acids, 20 parts of citric acid, 20 parts of sodium hydroxide, 8 parts of OP-4 surfactant, 8 parts of OP-7 surfactant, 10 parts of OP-10 surfactant, Weigh each component separately;

[0028] Step 2, heat and stir the surfactants OP-4, OP-7, and OP-10 weighed in step 1 at 70-80°C for 30 minutes to obtain a mixed surfactant;

[0029] In step 3, the vegetable fatty acid weighed in step 1 is heated to 130° C., and the weighed citric acid is stirred at 175° C. for 30 minutes to melt it into a liquid. Then add the heated fatty acid into the stirred liquefied citric acid to carry out esterification reaction, keep the temperature at 150°C and stir for 30min. A mixture containing fatty acid citrate and unreacted fatty acid is obtained;

[0030...

Embodiment 2

[0034] A kind of preparation method of normal temperature positive flotation collector of siliceous calcareous colloidal phosphate rock, the specific preparation steps are as follows:

[0035] Step 1, by mass ratio: 90 parts of vegetable fatty acids, 5 parts of citric acid, 15 parts of sodium hydroxide, 3 parts of OP-4 surfactants, 4 parts of OP-7 surfactants, 6 parts of OP-10 surfactants, Weigh each component separately;

[0036] Step 2, heat and stir the surfactants OP-4, OP-7, and OP-10 weighed in step 1 at 70-80°C for 25 minutes to obtain a mixed surfactant;

[0037] In step 3, the vegetable fatty acid weighed in step 1 is heated to 110° C., and the weighed citric acid is stirred at 150° C. for 25 minutes to melt it into a liquid. Then the heated fatty acid was added to the stirred liquefied citric acid to carry out esterification reaction, the temperature was maintained at 110°C, and stirred for 30 minutes. A mixture containing fatty acid citrate and unreacted fatty aci...

Embodiment 3

[0042] A kind of preparation method of normal temperature positive flotation collector of siliceous calcareous colloidal phosphate rock, the specific preparation steps are as follows:

[0043] Step 1, by mass ratio: 98 parts of vegetable fatty acids, 16 parts of citric acid, 18 parts of sodium hydroxide, 6 parts of OP-4 surfactants, 6 parts of OP-7 surfactants, 8 parts of OP-10 surfactants, Weigh each component separately;

[0044]Step 2, heat and stir the surfactants OP-4, OP-7, and OP-10 weighed in step 1 at 70-80°C for 28 minutes to obtain a mixed surfactant;

[0045] In step 3, the vegetable fatty acid weighed in step 1 is heated to 120° C., and the weighed citric acid is stirred at 175° C. for 25 minutes to melt it into a liquid. Then the heated fatty acid was added to the stirred liquefied citric acid to carry out esterification reaction, the temperature was maintained at 140°C, and the mixture was stirred for 25 minutes. A mixture containing fatty acid citrate and unr...

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Abstract

The invention relates to a silica-calcia bearing phosphate rock normal temperature direct flotation collecting agent and a preparation method thereof. The collecting agent comprises, by weight, 90-100 parts of plant fatty acid, 5-20 parts of citric acid, 15-20 parts of sodium hydroxide, 3-8 parts of OP-4, 3-8 parts of OP-7 and 5-10 parts of OP-10. The preparation method of the collecting agent includes the steps: stirring and melting the citric acid into liquid, and adding the heated plant fatty acid into the citric acid liquid for dewatering esterification reaction to obtain mixture containing fatty acid citrate and unreacted fatty acid; saponifying the mixture to obtain saponified matters; mixing, heating and stirring three surfactants to obtain mixed surfactants; finally, uniformly compounding and stirring the saponified matters and the mixed surfactants in proportion to obtain the collecting agent. The collecting agent is fine in solubility and high in selectivity and collecting capacity, the dosage of the collecting agent is less than that of similar agents, and normal temperature flotation of silica-calcia bearing phosphate rocks can be realized.

Description

technical field [0001] The invention belongs to the collophosite flotation technology, in particular to a normal-temperature positive flotation collector for siliceous calcareous collophosphate and a preparation method thereof. Background technique [0002] Flotation agent is the most critical factor in phosphate rock flotation. Phosphate rock flotation reagents can be divided into collectors, foaming agents, regulators (including inhibitors, activators, medium regulators), and flocculants according to their uses. Among them, collectors are widely concerned. The phosphate rock flotation collectors that have been used in industry are mainly fatty acid collectors such as oleic acid, oxidized paraffin soap and Tal soap. The problem of this type of collector is that it is difficult to dissolve and disperse in the pulp at low temperature, has poor selectivity to collophosite with complex properties, low flotation efficiency, and large dosage of reagents. In recent years, the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/018B03D101/02
Inventor 张俊辉罗惠华程仁举刘星李成秀陈炳炎张海峰饶欢欢杨婕陈慧李亮
Owner INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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