Melamine derivative compound calcium magnesium inhibitor for phosphate ore flotation and preparation and application method of melamine derivative compound calcium magnesium inhibitor for phosphate ore floatation

Abstract

The invention discloses a melamine derivative compound calcium magnesium inhibitor for phosphate ore floatation and a preparation and application method of the melamine derivative compound calcium magnesium inhibitor for phosphate ore floatation. The preparation method comprises the steps that firstly melamine, formaldehyde and sodium pyrosulfite are adopted and generate a reaction under the alkaline condition, and melamine hexasulfonic is prepared; then melamine hexaacetic acid is prepared; and finally the melamine hexasulfonic, the melamine hexaacetic acid and a synergist OP-10 are jointly added to a reactor, in the presence of the strong alkaline, basic materials are prepared, water is added for diluting, and the inhibitor is obtained. The synthetic process and the compound process of the inhibitor are simple and easy to implement, the reaction condition is mild, and the two kinds of melamine derivatives and the synergist are compounded; and complexing of calcium and magnesium minerals can be achieved more effectively under the synergetic action of the two kinds of melamine derivatives, the removal rate of oxide magnesium in the direct flotation process is increased, the direct-reverse flotation process is simplified as a one-step direct flotation process, the amount of a collector is reduced, the cost of flotation is lowered, and the melamine derivative compound calcium magnesium inhibitor and the preparation and application method are of great significance.

Description

technical field

[0001] The invention belongs to the technical field of phosphate rock flotation, and in particular relates to a melamine derivative compound type phosphorus rock flotation calcium and magnesium inhibitor and a preparation and use method thereof. Background technique

[0002] my country is rich in phosphate rock resources, but the grade is generally low. Most of them are low-grade collophosphine, and the gangue minerals are mostly in the form of fine particles that are closely embedded with phosphorite, making it extremely difficult for useful minerals and gangue minerals to dissociate. , resulting in poor separation at room temperature and difficult mineral processing. For medium and low grade calcium (magnesium)-siliceous phosphorites, the gangue minerals contain both carbonate minerals and silicate minerals, and the forward-reverse flotation process is generally used for separation. Usually, in the positive separation process, the magnesium-containing miner...

Examples

Embodiment 1

[0018] A kind of preparation method of melamine derivative complex phosphate rock flotation calcium magnesium inhibitor, comprises the following steps:

[0019] Take 12.6g of melamine and 64.86g of 37% formaldehyde solution into a four-neck flask, and adjust the pH of the solution to 9-11 with 0.5mol / L sodium hydroxide strong alkali solution. Heat the solution to 50-60°C, react for 30 minutes under medium-speed stirring, and then adjust the pH of the solution to 10-11 with 0.5 mol / L sodium hydroxide strong alkali solution. Slowly add a saturated aqueous solution containing 99.0 g of sodium metabisulfite dropwise to the solution. After the dropwise addition, the solution is heated to 90° C. for 120 minutes of reaction. The reaction product is concentrated by rotary evaporation, acidified, and washed with ethanol to obtain melamine hexasulfonic acid.

[0020] Referring to the relevant literature methods, melamine hexaacetic acid was prepared from melamine, chloroacetic acid, met...

Embodiment 2

[0029] A kind of preparation method of melamine derivative complex phosphate rock flotation calcium magnesium inhibitor, comprises the following steps:

[0030] Take 12.6 g of melamine and 81.0 g of 37% formaldehyde solution in a four-necked flask, and adjust the pH of the solution to 9-11 with 0.5 mol / L sodium hydroxide strong alkali solution. Heat the solution to 50-60°C, react for 30 minutes under medium-speed stirring, and then adjust the pH of the solution to 11-12 with 0.5 mol / L sodium hydroxide strong alkali solution. Slowly add a saturated solution containing 76.0 g of sodium metabisulfite dropwise into the solution. After the dropwise addition, the solution is heated to 90° C. for 120 minutes. The reaction product is successively concentrated by rotary evaporation, acidified, and washed with ethanol to obtain melamine hexasulfonic acid.

[0031] Melamine hexaacetic acid was prepared from melamine, chloroacetic acid, methanol and triethylamine. After the reaction prod...

Embodiment 3

[0040] A kind of preparation method of melamine derivative complex phosphate rock flotation calcium magnesium inhibitor, comprises the following steps:

[0041] Take 12.6g of melamine and 48.65g of formaldehyde solution with a mass fraction of 37% and add them into a four-neck flask, and adjust the pH of the solution to 10 with 0.5mol / L sodium hydroxide strong alkali solution. The temperature of the solution was raised to 55°C, and the pH of the solution was adjusted to 11 with 0.5 mol / L sodium hydroxide strong alkali solution after reacting for 30 minutes under medium-speed stirring. Slowly add a saturated solution containing 114 g of sodium metabisulfite dropwise into the solution. After the dropwise addition, the solution is heated to 90° C. for 120 minutes of reaction. The reaction product is sequentially concentrated by rotary evaporation, acidified, and washed with ethanol to obtain melamine hexasulfonic acid.

[0042] Melamine hexaacetic acid was prepared from melamine,...

technical field

[0001] The invention belongs to the technical field of phosphate rock flotation, and in particular relates to a melamine derivative compound type phosphorus rock flotation calcium and magnesium inhibitor and a preparation and use method thereof. Background technique

[0002] my country is rich in phosphate rock resources, but the grade is generally low. Most of them are low-grade collophosphine, and the gangue minerals are mostly in the form of fine particles that are closely embedded with phosphorite, making it extremely difficult for useful minerals and gangue minerals to dissociate. , resulting in poor separation at room temperature and difficult mineral processing. For medium and low grade calcium (magnesium)-siliceous phosphorites, the gangue minerals contain both carbonate minerals and silicate minerals, and the forward-reverse flotation process is generally used for separation. Usually, in the positive separation process, the magnesium-containing miner...

Examples

Embodiment 1

[0018] A kind of preparation method of melamine derivative complex phosphate rock flotation calcium magnesium inhibitor, comprises the following steps:

[0019] Take 12.6g of melamine and 64.86g of 37% formaldehyde solution into a four-neck flask, and adjust the pH of the solution to 9-11 with 0.5mol / L sodium hydroxide strong alkali solution. Heat the solution to 50-60°C, react for 30 minutes under medium-speed stirring, and then adjust the pH of the solution to 10-11 with 0.5 mol / L sodium hydroxide strong alkali solution. Slowly add a saturated aqueous solution containing 99.0 g of sodium metabisulfite dropwise to the solution. After the dropwise addition, the solution is heated to 90° C. for 120 minutes of reaction. The reaction product is concentrated by rotary evaporation, acidified, and washed with ethanol to obtain melamine hexasulfonic acid.

[0020] Referring to the relevant literature methods, melamine hexaacetic acid was prepared from melamine, chloroacetic acid, met...

Embodiment 2

[0029] A kind of preparation method of melamine derivative complex phosphate rock flotation calcium magnesium inhibitor, comprises the following steps:

[0030] Take 12.6 g of melamine and 81.0 g of 37% formaldehyde solution in a four-necked flask, and adjust the pH of the solution to 9-11 with 0.5 mol / L sodium hydroxide strong alkali solution. Heat the solution to 50-60°C, react for 30 minutes under medium-speed stirring, and then adjust the pH of the solution to 11-12 with 0.5 mol / L sodium hydroxide strong alkali solution. Slowly add a saturated solution containing 76.0 g of sodium metabisulfite dropwise into the solution. After the dropwise addition, the solution is heated to 90° C. for 120 minutes. The reaction product is successively concentrated by rotary evaporation, acidified, and washed with ethanol to obtain melamine hexasulfonic acid.

[0031] Melamine hexaacetic acid was prepared from melamine, chloroacetic acid, methanol and triethylamine. After the reaction prod...

Embodiment 3

[0040] A kind of preparation method of melamine derivative complex phosphate rock flotation calcium magnesium inhibitor, comprises the following steps:

[0041] Take 12.6g of melamine and 48.65g of formaldehyde solution with a mass fraction of 37% and add them into a four-neck flask, and adjust the pH of the solution to 10 with 0.5mol / L sodium hydroxide strong alkali solution. The temperature of the solution was raised to 55°C, and the pH of the solution was adjusted to 11 with 0.5 mol / L sodium hydroxide strong alkali solution after reacting for 30 minutes under medium-speed stirring. Slowly add a saturated solution containing 114 g of sodium metabisulfite dropwise into the solution. After the dropwise addition, the solution is heated to 90° C. for 120 minutes of reaction. The reaction product is sequentially concentrated by rotary evaporation, acidified, and washed with ethanol to obtain melamine hexasulfonic acid.

[0042] Melamine hexaacetic acid was prepared from melamine,...

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