Resource utilization method for catalytic oxidation leaching of molybdenum and nickel from molybdenum-nickel ore

A technology for catalytic oxidation and molybdenum-nickel ore, which is applied in the direction of improving process efficiency to achieve the effects of easy control of the reaction, improved leaching effect and mild reaction.

Inactive Publication Date: 2012-09-19
NANJING YUANTAI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] The object of the present invention is to provide a resource utilization method for catalyzing and oxidizing leaching molybdenum and nickel from molybdenum-nickel ore, which solves the environmental protection prob

Method used

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  • Resource utilization method for catalytic oxidation leaching of molybdenum and nickel from molybdenum-nickel ore
  • Resource utilization method for catalytic oxidation leaching of molybdenum and nickel from molybdenum-nickel ore
  • Resource utilization method for catalytic oxidation leaching of molybdenum and nickel from molybdenum-nickel ore

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Embodiment 1

[0047] The molybdenum-nickel raw ore is crushed and ground to obtain a molybdenum-nickel ore powder with a particle size of 200-300 meshes. The active ingredients of the molybdenum-nickel ore: molybdenum is 6.1%, nickel is 3.2%, and sulfur is 23%. The mass percentage of 1000g is 98.3% sulfuric acid and 200g sodium nitrate were prepared into 5000ml aqueous solution, and the above-mentioned 2000g molybdenum-nickel ore powder and 5000ml solution were added to the reaction kettle, and 15g elemental iron powder was added to fully mix for oxidative leaching; after heating to 100°C, stop heating, because The reaction is an exothermic reaction, the temperature will naturally rise to 150°C, keep the reaction pressure at 0.7Mpa, the oxygen partial pressure at 0.35MPa, and react for 2.5 hours. After the reaction, the leachate with a total acid content of 260g / l was obtained by filtration, and the acid and salt were separated by membrane technology (selective diffusion dialysis membrane). ...

Embodiment 2

[0050] The molybdenum-nickel ore is crushed and ground to obtain molybdenum-nickel ore powder with a particle size of 200-300 meshes. The active ingredients of the molybdenum-nickel ore: molybdenum is 6.1%, nickel is 3.2%, and sulfur is 23%; the mass percentage of 900g is 98.3% % sulfuric acid and 200g sodium nitrate to prepare 5000ml aqueous solution, add the above-mentioned 2000g molybdenum-nickel ore powder and 5000ml solution into the reaction kettle, add 30g ferrous sulfate and mix thoroughly for oxidative leaching; stop heating after heating to 100°C, due to reaction It is an exothermic reaction, the temperature will naturally rise to 140°C, keep the reaction pressure at 0.6Mpa, oxygen partial pressure at 0.4MPa, and react for 3 hours. After the reaction, the total acid content in the leachate was filtered to be 250g / l. After the salt was separated by membrane technology (selective diffusion dialysis membrane), the total acidity of the separated liquid containing metal io...

Embodiment 3

[0053] The molybdenum-nickel ore is crushed and ground to obtain molybdenum-nickel ore powder with a particle size of 200-300 meshes. The active ingredients of the molybdenum-nickel ore: molybdenum is 6.1%, nickel is 3.2%, and sulfur is 23%; the mass percentage of 600g is 98% % sulfuric acid and 200g sodium nitrate to prepare 5000ml aqueous solution, add the above-mentioned 2000g molybdenum-nickel ore powder and 5000ml solution into the reaction kettle, add 36g copper sulfate and mix thoroughly for oxidative leaching; stop heating after heating to 120°C, because the reaction is Exothermic reaction, the temperature will naturally rise to 155°C, keep the reaction pressure at 0.8Mpa, oxygen partial pressure at 0.5MPa, and react for 2 hours. After the reaction was finished, the total acidity in the leachate obtained by filtration was 168g / l. After the salt was separated using membrane technology (selective membrane technology (selective diffusion dialysis membrane)), the total acid...

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Abstract

The invention discloses a resource utilization method for catalytic oxidation leaching of molybdenum and nickel from molybdenum-nickel ore. By the method, the production efficiency is improved and the production cost is reduced. The resource utilization method comprises the following steps: A) crushing and grinding the molybdenum-nickel ore to obtain molybdenum-nickel ore powder with the granularity of 100-300 meshes; B) preparing a leaching solution by using nitrate, acid and water in a ratio; C) adding the molybdenum-nickel ore powder obtained in the step A), a catalyst and the leaching solution obtained in the step B) into a reaction kettle, and performing leaching reaction to obtain leachate; and D) filtering the leachate, separating acid and salt from the filtrate by using a membraneseparation method or an ion exchange method, recycling an acid solution, adjusting the pH value of a salt-containing separated solution, and precipitating to obtain a molybdenum compound and a nickelcompound.

Description

technical field [0001] The invention relates to a method for leaching molybdenum and nickel from molybdenum-nickel ore, in particular to a resource utilization method for catalytic oxidation leaching molybdenum and nickel from molybdenum-nickel ore, which belongs to the field of hydrometallurgy. Background technique [0002] There are two main types of nickel deposits: magmatic nickel sulfide deposits and weathered laterite nickel deposits, of which the reserves of laterite nickel deposits account for 72% of the world's nickel resources. In recent years, driven by the stainless steel industry, the demand for nickel in the world has continued to rise. At present, about 60% of nickel is extracted from sulfide ores, but the resources of sulfide ores have decreased sharply, the grade has declined, the mining depth has increased, and mining has become more difficult. Costs go up. About 40% is extracted from laterite nickel ore. About 66% of the world's refined nickel is used to...

Claims

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Application Information

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IPC IPC(8): C22B3/06C22B3/22C22B3/42C22B23/00C22B34/34
CPCY02P10/20
Inventor 徐超群吴争鸣
Owner NANJING YUANTAI ENVIRONMENTAL PROTECTION TECH
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