Floatation depressant and methods for preparing and using depressing agent

Abstract

The invention relates to a floatation depressant for obtaining molybdenum concentrate and copper concentrate by mineral separation, particularly by separation of copper-molybdenum mixed concentrate, and methods for preparing and using the floatation depressant. The floatation depressant is characterized by being an organic liquid agent obtained through chemical reaction by using mercaptoacetic acid, gallic acid and sodium hydroxide as raw materials. The floatation depressant is the organic liquid agent obtained through the chemical reaction of pyrogallic acid, the mercaptoacetic acid and the sodium hydroxide, and can be used for effectively depressing primary and secondary copper sulfide ores such as copper pyrite and chalcocite, and the copper-molybdenum mixed concentrate can be effectively separated. The defects of large usage of common sodium sulfide, severe operation environment and serious pollution are overcome, and the floatation depressant has the advantages of convenience in addition, safety in use and the like. An effective method which is small in agent usage, convenient to use and low in environmental pollution is provided for the separation of molybdenum copper sulfide mixed concentrate.

Description

technical field

[0001] The invention relates to a flotation inhibitor and its preparation and use method, which relate to ore dressing and separation, in particular to a flotation inhibitor for obtaining molybdenum concentrate and copper concentrate by separating copper-molybdenum mixed concentrate and its preparation and use method. Background technique

[0002] For a long time, in the separation process of copper and molybdenum minerals, a large amount of sodium sulfide is often used as an inhibitor of copper minerals to separate copper and molybdenum minerals to obtain molybdenum concentrates and copper concentrates. The amount of sodium sulfide generally needs to be about 30kg / t. A large amount of sodium sulfide not only has high production and processing costs, but also causes unnecessary economic burdens on enterprises. On the other hand, the aqueous solution of sodium sulfide will emit unpleasant and toxic gases. This unpleasant gas is hydrogen sulfide released from wa...

Examples

Embodiment 1

[0025] An example of the preparation method of the inhibitor of the present invention comprises the following steps:

[0026] In the reactor, add thioglycolic acid, gallic acid, and sodium hydroxide at a molar ratio of 1:0.5:1.7, keep the reaction temperature at 50°C for 4 hours, and cool to obtain a clear and transparent solution, which is the flotation inhibitor.

[0027]

Embodiment 2

[0029] Another example of the preparation method of the inhibitor of the present invention comprises the following steps:

[0030] In the reactor, add thioglycolic acid, gallic acid, and sodium hydroxide at a molar ratio of 1.5:0.4:2.3, keep the reaction temperature at 70°C for 2 hours, and cool to obtain a clear and transparent solution, which is the flotation inhibitor.

Embodiment 3

[0032] This embodiment is an application example of separating copper-molybdenum minerals in copper-molybdenum mixed flotation concentrate by the flotation inhibitor.

[0033] A copper-molybdenum sulfide ore was subjected to copper-molybdenum mixed flotation to obtain copper-molybdenum mixed concentrate. The mixed concentrate contained 0.32% molybdenum and 22.65% copper. , and sequentially add water glass, inhibitor, kerosene, and stir, after two times of roughing and six times of beneficiation, a molybdenum concentrate containing 46.15% molybdenum and 0.79% copper can be obtained. The amount of water glass added is 1500g / t for ore, the amount of inhibitor added is 6500g / t for ore, and the amount of kerosene added is 150g / t for ore. The inhibitor is the flotation inhibitor prepared in Example 1 or Example 2.

technical field

[0001] The invention relates to a flotation inhibitor and its preparation and use method, which relate to ore dressing and separation, in particular to a flotation inhibitor for obtaining molybdenum concentrate and copper concentrate by separating copper-molybdenum mixed concentrate and its preparation and use method. Background technique

[0002] For a long time, in the separation process of copper and molybdenum minerals, a large amount of sodium sulfide is often used as an inhibitor of copper minerals to separate copper and molybdenum minerals to obtain molybdenum concentrates and copper concentrates. The amount of sodium sulfide generally needs to be about 30kg / t. A large amount of sodium sulfide not only has high production and processing costs, but also causes unnecessary economic burdens on enterprises. On the other hand, the aqueous solution of sodium sulfide will emit unpleasant and toxic gases. This unpleasant gas is hydrogen sulfide released from wa...

Examples

Embodiment 1

[0025] An example of the preparation method of the inhibitor of the present invention comprises the following steps:

[0026] In the reactor, add thioglycolic acid, gallic acid, and sodium hydroxide at a molar ratio of 1:0.5:1.7, keep the reaction temperature at 50°C for 4 hours, and cool to obtain a clear and transparent solution, which is the flotation inhibitor.

[0027]

Embodiment 2

[0029] Another example of the preparation method of the inhibitor of the present invention comprises the following steps:

[0030] In the reactor, add thioglycolic acid, gallic acid, and sodium hydroxide at a molar ratio of 1.5:0.4:2.3, keep the reaction temperature at 70°C for 2 hours, and cool to obtain a clear and transparent solution, which is the flotation inhibitor.

Embodiment 3

[0032] This embodiment is an application example of separating copper-molybdenum minerals in copper-molybdenum mixed flotation concentrate by the flotation inhibitor.

[0033] A copper-molybdenum sulfide ore was subjected to copper-molybdenum mixed flotation to obtain copper-molybdenum mixed concentrate. The mixed concentrate contained 0.32% molybdenum and 22.65% copper. , and sequentially add water glass, inhibitor, kerosene, and stir, after two times of roughing and six times of beneficiation, a molybdenum concentrate containing 46.15% molybdenum and 0.79% copper can be obtained. The amount of water glass added is 1500g / t for ore, the amount of inhibitor added is 6500g / t for ore, and the amount of kerosene added is 150g / t for ore. The inhibitor is the flotation inhibitor prepared in Example 1 or Example 2.

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