CN108057526A - A combined collector for improving the grade of potassium feldspar and its preparation method - Google Patents

Abstract

the combined collecting agent comprises a flotation roughing collecting agent and a flotation refining collecting agent, the flotation roughing collecting agent is mainly prepared from 2-4 parts of petroleum sodium sulfonate, 1-2 parts of oleic acid, 1-3 parts of OP emulsifier, 1-3 parts of sodium alkyl hydroximate, 1-2 parts of oxidized paraffin soap and 12-14 parts of water according to the mass ratio, and the flotation refining collecting agent is mainly methyl N-dodecyl- β -aminopropionate.

Description

A combined collector for improving the grade of potassium feldspar and its preparation method

technical field

The invention relates to the technical field of potassium feldspar flotation agents, in particular to a combined collector for improving the grade of potassium feldspar and a preparation method thereof.

Background technique

Potassium feldspar and quartz are similar in physical properties, crystal structure, etc., and flotation has become the main method for their separation. The commonly used flotation method is in strong acid and strong alkali environment, according to the surface potential difference of quartz and potassium feldspar in different flotation systems, using anion or cationic collectors for preferential adsorption behavior for flotation, using amines The collector is used to collect quartz, which has achieved the purpose of improving the grade of potassium feldspar. In these methods, the pH of the flotation liquid is difficult to control, and the flotation liquid has serious corrosion to the equipment and poses a safety hazard to the production. Conventional amine collectors have poor selectivity, low temperature resistance, hard water resistance and large dosage of chemicals. Therefore, the flotation reagent system and flotation process that can efficiently improve the grade of potassium feldspar under weak acid, weak alkali or neutral conditions are of great significance to potassium feldspar beneficiation.

Contents of the invention

The purpose of the present invention is to solve the problems existing in the prior art, and to provide a combined trap with simple composition, good flotation separation effect, high operating safety factor, environment-friendly, and the separation of potassium feldspar and quartz in a neutral environment. Receiver.

Technical scheme of the present invention is realized like this:

A combined collector for improving the grade of potassium feldspar includes: a flotation roughing collector and a flotation fine-tuning collector, and the flotation roughing collector is mainly prepared from raw materials with the following mass ratios: Sodium petroleum sulfonate 2~4: oleic acid 1~2: OP emulsifier 1~3: sodium alkylhydroxamic acid 1~3: oxidized paraffin soap 1~2: water 12~14, the flotation selection The main solvent is N-dodecyl-β-alanine methyl ester.

The present invention also provides a method for preparing a flotation roughing collector, comprising the following steps:

(1) Put sodium petroleum sulfonate, oleic acid, OP emulsifier, sodium alkylhydroxamic acid, oxidized paraffin wax soap, and water according to the mass ratio: sodium petroleum sulfonate 2~4: oleic acid 1~2: OP emulsifier 1 ~3: sodium alkylhydroxamic acid 1~3: oxidized paraffin wax soap 1~2: water 12~14 and mix well to obtain a mixture;

(2) Add the mixture of step (1) into the reaction kettle and heat to boiling;

(3) Keep the solution boiling for 10-15 minutes until the solution turns dark red;

(4) Naturally cool the solution to room temperature to obtain a flotation roughing collector.

The present invention also provides a method for preparing a fine collector for flotation, comprising the following steps:

A. Add 1mol~1.2mol dodecylamine into a three-necked flask with a thermometer, heat and stir for 1h~1.2h;

B. Add 1.1mol~1.3mol of methyl acrylate dropwise into the three-necked flask, and stir for 5h~6h;

C. After the reaction is over, the excess methyl acrylate is recovered by evaporation to obtain N-dodecyl-β-aminopropionic acid methyl ester as a flotation fine-tuning collector.

Further, the heating temperature in step A is 50°C to 55°C.

Further, the evaporation temperature in step C is 20°C to 25°C.

The beneficial effects of the present invention are:

The combined collector of the present invention can be used under neutral conditions, reducing corrosion and potential safety hazards to equipment. The synthesis method of the agent is simple, non-toxic and harmless, and the flotation effect of the agent is good, which can increase the grade of potassium feldspar by 1.5%~2 %.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

The preparation method of flotation roughing collector in the present embodiment comprises the following steps:

(1) Sodium petroleum sulfonate, oleic acid, OP emulsifier, sodium alkylhydroxamic acid, oxidized paraffin wax soap, and water are mixed according to the mass ratio: sodium petroleum sulfonate 2: oleic acid 2: OP emulsifier 1: alkyl hydroxyl Sodium oximate 3: oxidized paraffin wax soap 2: water 14 mixed and stirred evenly to obtain a mixture;

(2) Add the mixture of step (1) into the reaction kettle and heat to boiling;

(3) Keep the solution boiling for 10 minutes until the solution turns dark red;

(4) Naturally cool the solution to room temperature to obtain a flotation roughing collector.

A method for preparing a flotation selective collector, comprising the following steps:

A. Add 1mol of dodecylamine into a three-necked flask with a thermometer, heat and stir for 1h;

B. Add 1.1mol of methyl acrylate dropwise into a three-necked flask, and stir for 5 hours;

C. After the reaction is over, the excess methyl acrylate is recovered by evaporation to obtain N-dodecyl-β-aminopropionic acid methyl ester as a flotation fine-tuning collector.

The combined collector in this example is applied to flotation of a certain potassium feldspar in Henan. The amount of collector for flotation roughing is 400g/t, and the amount of collector for flotation is 200g/t. The grade of potassium feldspar is increased by 2%.

Example 2

The preparation method of flotation roughing collector in the present embodiment comprises the following steps:

(1) Sodium petroleum sulfonate, oleic acid, OP emulsifier, sodium alkylhydroxamic acid, oxidized paraffin wax soap, and water are mixed according to the mass ratio: sodium petroleum sulfonate 3: oleic acid 1: OP emulsifier 2: alkyl hydroxyl Sodium oximate 2: oxidized paraffin wax soap 1: water 13 mixed and stirred evenly to obtain a mixture;

(2) Add the mixture of step (1) into the reaction kettle and heat to boiling;

(3) Keep the solution boiling for 12 minutes until the solution turns dark red;

(4) Naturally cool the solution to room temperature to obtain a flotation roughing collector.

A method for preparing a flotation selective collector, comprising the following steps:

A. Add 1.1mol dodecylamine into a three-necked flask with a thermometer, heat and stir for 1.1h;

B. Add 1.2mol of methyl acrylate dropwise into a three-necked flask, and stir for 5.5 hours;

C. After the reaction is over, the excess methyl acrylate is recovered by evaporation to obtain N-dodecyl-β-aminopropionic acid methyl ester as a flotation fine-tuning collector.

The combined collector in this example is applied to the flotation of a certain potassium feldspar in Anhui. The amount of collector for flotation roughing is 500g/t, and the amount of collector for flotation is 150g/t. The grade of potassium feldspar is increased by 1.7%.

Example 3

The preparation method of flotation roughing collector in the present embodiment comprises the following steps:

(1) Sodium petroleum sulfonate, oleic acid, OP emulsifier, sodium alkylhydroxamic acid, oxidized paraffin wax soap, and water are mixed according to the mass ratio: sodium petroleum sulfonate 4: oleic acid 1: OP emulsifier 2: alkyl hydroxyl Sodium oximate 1: oxidized paraffin wax soap 2: water 12 mixed and stirred evenly to obtain a mixture;

(2) Add the mixture of step (1) into the reaction kettle and heat to boiling;

(3) Keep the solution boiling for 15 minutes until the solution turns dark red;

(4) Naturally cool the solution to room temperature to obtain a flotation roughing collector.

A method for preparing a flotation selective collector, comprising the following steps:

A. Add 1.2mol dodecylamine into a three-necked flask with a thermometer, heat and stir for 1.2h;

B. Add 1.3mol of methyl acrylate dropwise into a three-necked flask, and stir for 6 hours;

C. After the reaction is over, the excess methyl acrylate is recovered by evaporation to obtain N-dodecyl-β-aminopropionic acid methyl ester as a flotation fine-tuning collector.

The combined collector in this example is used for flotation of a certain potassium feldspar in Anhui. The amount of collector for flotation roughing is 600g/t, and the amount of collector for flotation is 100g/t. The grade of potassium feldspar is increased by 1.5%.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (5)

1. A combination collector improving potassium feldspar grade comprises: flotation roughing collector and flotation selected collector, and described flotation roughing collector is mainly prepared by the raw material of following mass ratio Composition: sodium petroleum sulfonate 2~4: oleic acid 1~2: OP emulsifier 1~3: sodium alkylhydroxamic acid 1~3: oxidized paraffin wax soap 1~2: water 12~14, the flotation concentrate The selected collector is mainly N-dodecyl-β-alanine methyl ester. 2. a kind of combined collector improving potassium feldspar grade according to claim 1 and preparation method thereof, is characterized in that, described flotation roughing collector is prepared by the following steps: (1) Put sodium petroleum sulfonate, oleic acid, OP emulsifier, sodium alkylhydroxamic acid, oxidized paraffin wax soap, and water according to the mass ratio: sodium petroleum sulfonate 2~4: oleic acid 1~2: OP emulsifier 1 ~3: sodium alkylhydroxamic acid 1~3: oxidized paraffin wax soap 1~2: water 12~14 and mix well to obtain a mixture; (2) Add the mixture of step (1) into the reaction kettle and heat to boiling; (3) Keep the solution boiling for 10-15 minutes until the solution turns dark red; (4) Naturally cool the solution to room temperature to obtain a flotation roughing collector. 3. a kind of combined collector improving potassium feldspar grade according to claim 1 and preparation method thereof, is characterized in that, described flotation fine-tuning collector is prepared by the following steps: A. Add 1mol~1.2mol dodecylamine into a three-necked flask with a thermometer, heat and stir for 1h~1.2h; B. Add 1.1mol~1.3mol of methyl acrylate dropwise into the three-necked flask, and stir for 5h~6h; C. After the reaction is over, the excess methyl acrylate is recovered by evaporation to obtain N-dodecyl-β-aminopropionic acid methyl ester as a flotation fine-tuning collector. 4. A combined collector for improving the grade of potassium feldspar and a preparation method thereof according to claim 3, characterized in that, the heating temperature in step A is 50°C to 55°C. 5. A combined collector for improving the grade of potassium feldspar and a preparation method thereof according to claim 3, characterized in that, the evaporation temperature in step C is 20°C to 25°C.