Processing for recovering low-grade molybdenum oxide concentrate through wet process

Abstract

The invention relates to a processing for recovering low-grade molybdenum oxide concentrate through a wet process, belonging to the technical field of metallurgy. The process comprises the following steps: 1) grinding molybdenum rough concentrate, then adding sodium carbonate for leaching sodium hydroxide medicament, and carrying out solid-liquid separation on the concentrate slurry after leaching to obtain a sodium molybdate solution and leached slag; 2) carrying out flotation on the leached slag to prepare molybdenum concentrate; and 3) preparing ammonium molybdate by utilizing the solution of sodium molybdate: adding acid into the sodium molybdate solution to regulate the pH value to be 5-7, heating to 65-70 DEG C, filtering for removing silicon, extracting the filtered solution with the mixed solvent of N235, 2-octanol and kerosene, taking organic phases, adding ammonia water for back extraction to obtain an ammonium molybdate solution, and carrying out acid precipitation on the ammonium molybdate solution to obtain ammonium molybdate products. The scheme realizes the purpose of preparing two types of products by using one process and is used for processing the molybdenum oxide rough concentrate of which the molybdenum oxidation rate is 50-90% and the molybdenum grade is 5-35% to obtain the ammonium molybdate products of which the purity is greater than 56% and the molybdenum concentrate of which the grade is greater than 40%, and the recovery rate of molybdenum in the whole process is 80-96%.

Description

technical field

[0001] The invention belongs to the technical field of metallurgy, and in particular relates to a process for recovering low-grade molybdenum oxide concentrate by wet method. Background technique

[0002] Molybdenum is mainly combined with sulfur to form molybdenite during endogenous ore formation. Most of the common molybdenum oxide raw materials in the market are molybdenum calcined sand obtained by roasting molybdenite, while low-grade molybdenum oxide is extremely difficult to use. In actual production, the molybdenum concentrate obtained after flotation of low-grade molybdenum oxide ore will still fail to meet the sales standard due to low grade, the market space is extremely small, and the price is mainly determined by the buyer. With the development of science, technology and production, human beings' demand for mineral resources is increasing day by day. The paradox is that the limited mineral resources in the earth's crust are gradually being exhaust...

Examples

Embodiment 1

[0015] The process of wet recovery of low-grade molybdenum oxide concentrate, such as figure 1 As shown, the steps include:

[0016] 1) Molybdenum coarse concentrate is ground to make the fineness reach -200 mesh and the content is not less than 90%, and then add leaching agents sodium carbonate and sodium hydroxide, so that sodium carbonate accounts for 10% of the total weight of dry ore and agents, hydrogen Sodium oxide accounts for 5%; adjust the pulp concentration to 30%, and then put the pulp into the reaction kettle for leaching for 2 hours at a leaching temperature of 80°C; the leached pulp is filtered and washed by a filter press to achieve solid-liquid separation and obtain molybdic acid Sodium solution and leach residue.

[0017] 2) Use the flotation process of one rough, five fine and one sweep to flotation the leached slag to produce molybdenum concentrate. The flotation reagents required for each ton of leached slag are: 10g of sodium cyanide, 300g of water glass...

Embodiment 2

[0020] The process of wet recovery of low-grade molybdenum oxide concentrate, such as figure 1 As shown, the steps include:

[0021] 1) The molybdenum coarse concentrate is ground to make the fineness reach -200 mesh and the content is not less than 90%, and then add the leaching agent sodium carbonate and sodium hydroxide, so that the sodium carbonate accounts for 20% of the total weight of the dry ore and the agent, hydrogen Sodium oxide accounts for 1%; adjust the pulp concentration to 50%, then put the pulp into the reaction kettle for leaching for 1 hour, and the leaching temperature is 100°C; the leached pulp is filtered and washed by a filter press to achieve solid-liquid separation and obtain molybdic acid Sodium solution and leach residue.

[0022] 2) Use the flotation process of one rough, five fine and one sweep to flotation the leached slag to produce molybdenum concentrate. The flotation reagents required for each ton of leached slag are: 30g of sodium cyanide, 6...

Embodiment 3

[0025] The process of wet recovery of low-grade molybdenum oxide concentrate, such as figure 1 As shown, the steps include:

[0026] 1) The molybdenum coarse concentrate is ground to make the fineness reach -200 mesh and the content is not less than 90%, and then add the leaching agent sodium carbonate and sodium hydroxide, so that the sodium carbonate accounts for 15% of the total weight of the dry ore and the agent, hydrogen Sodium oxide accounts for 3%; adjust the pulp concentration to 40%, and then put the pulp into the reaction kettle for leaching for 1.5 hours at a leaching temperature of 90°C; the leached pulp is filtered and washed by a filter press to achieve solid-liquid separation and obtain molybdenum Sodium acid solution and leaching residue.

[0027] 2) Use the flotation process of one rough, five fine and one sweep to flotation the leaching slag to produce molybdenum concentrate. The flotation reagents required for each ton of leaching slag are: 20g of sodium c...

technical field

[0001] The invention belongs to the technical field of metallurgy, and in particular relates to a process for recovering low-grade molybdenum oxide concentrate by wet method. Background technique

[0002] Molybdenum is mainly combined with sulfur to form molybdenite during endogenous ore formation. Most of the common molybdenum oxide raw materials in the market are molybdenum calcined sand obtained by roasting molybdenite, while low-grade molybdenum oxide is extremely difficult to use. In actual production, the molybdenum concentrate obtained after flotation of low-grade molybdenum oxide ore will still fail to meet the sales standard due to low grade, the market space is extremely small, and the price is mainly determined by the buyer. With the development of science, technology and production, human beings' demand for mineral resources is increasing day by day. The paradox is that the limited mineral resources in the earth's crust are gradually being exhaust...

Examples

Embodiment 1

[0015] The process of wet recovery of low-grade molybdenum oxide concentrate, such as figure 1 As shown, the steps include:

[0016] 1) Molybdenum coarse concentrate is ground to make the fineness reach -200 mesh and the content is not less than 90%, and then add leaching agents sodium carbonate and sodium hydroxide, so that sodium carbonate accounts for 10% of the total weight of dry ore and agents, hydrogen Sodium oxide accounts for 5%; adjust the pulp concentration to 30%, and then put the pulp into the reaction kettle for leaching for 2 hours at a leaching temperature of 80°C; the leached pulp is filtered and washed by a filter press to achieve solid-liquid separation and obtain molybdic acid Sodium solution and leach residue.

[0017] 2) Use the flotation process of one rough, five fine and one sweep to flotation the leached slag to produce molybdenum concentrate. The flotation reagents required for each ton of leached slag are: 10g of sodium cyanide, 300g of water glass...

Embodiment 2

[0020] The process of wet recovery of low-grade molybdenum oxide concentrate, such as figure 1 As shown, the steps include:

[0021] 1) The molybdenum coarse concentrate is ground to make the fineness reach -200 mesh and the content is not less than 90%, and then add the leaching agent sodium carbonate and sodium hydroxide, so that the sodium carbonate accounts for 20% of the total weight of the dry ore and the agent, hydrogen Sodium oxide accounts for 1%; adjust the pulp concentration to 50%, then put the pulp into the reaction kettle for leaching for 1 hour, and the leaching temperature is 100°C; the leached pulp is filtered and washed by a filter press to achieve solid-liquid separation and obtain molybdic acid Sodium solution and leach residue.

[0022] 2) Use the flotation process of one rough, five fine and one sweep to flotation the leached slag to produce molybdenum concentrate. The flotation reagents required for each ton of leached slag are: 30g of sodium cyanide, 6...

Embodiment 3

[0025] The process of wet recovery of low-grade molybdenum oxide concentrate, such as figure 1 As shown, the steps include:

[0026] 1) The molybdenum coarse concentrate is ground to make the fineness reach -200 mesh and the content is not less than 90%, and then add the leaching agent sodium carbonate and sodium hydroxide, so that the sodium carbonate accounts for 15% of the total weight of the dry ore and the agent, hydrogen Sodium oxide accounts for 3%; adjust the pulp concentration to 40%, and then put the pulp into the reaction kettle for leaching for 1.5 hours at a leaching temperature of 90°C; the leached pulp is filtered and washed by a filter press to achieve solid-liquid separation and obtain molybdenum Sodium acid solution and leaching residue.

[0027] 2) Use the flotation process of one rough, five fine and one sweep to flotation the leaching slag to produce molybdenum concentrate. The flotation reagents required for each ton of leaching slag are: 20g of sodium c...

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