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Method for extracting molybdenum and nickel by molybdenum nickel ore whole wet method

A technology of molybdenum-nickel ore and full-wet method, which is applied in the field of full-wet extraction of molybdenum-nickel from black rock series molybdenum-nickel ore, which can solve the problems of high chlorine-containing wastewater treatment costs, high production costs, and environmental pollution. Clean and environmentally friendly, low processing cost, and mild pressure oxidation leaching conditions

Active Publication Date: 2008-12-17
BEIJING GENERAL RES INST OF MINING & METALLURGY
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Problems solved by technology

Some domestic scientific research institutes have carried out research on the full-wet treatment of molybdenum-nickel ore, and have made some progress. Zou Guitian of Guiyang Jinzhu University proposed in the Chinese patent CN1267739A that the full-wet oxidation leaching method using ammonium nitrate as the oxidant in dilute acid medium The molybdenum-nickel ore process, proposed in the Chinese patent CN1267740A, uses nitrate as an oxidant to oxidize the leaching of molybdenum-nickel ore in a weakly alkaline medium. These two processes solve the problem of SO 2 Gas generation, but nitrogen oxide gas will be produced during the oxidative leaching process, and there is also a hidden danger of air pollution. In addition, due to the consumption of a large amount of ammonium nitrate oxidant in the leaching process, the production cost is high
Wu Hongpei et al. proposed in Chinese patent CN1033784 the concentrated acid aging leaching and depolymerization solvent extraction process of molybdenum-nickel ore. Before the concentrated acid aging and leaching, molybdenum-nickel ore also needs to be oxidized and roasted for desulfurization, so this process also has SO 2 For the problem of environmental pollution, Li Qinggang of Central South University and others used sodium hypochlorite as an oxidant to oxidize and leaching molybdenum-nickel ore in alkaline medium. The leaching rate of molybdenum in this process can reach more than 94%, and the yield of molybdenum is relatively high. SO 2 The problem of flue gas pollution, but the leaching process consumes a large amount of sodium hypochlorite, the production cost is high, and the cost of chlorine-containing wastewater treatment generated by the leaching process is also high

Method used

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  • Method for extracting molybdenum and nickel by molybdenum nickel ore whole wet method

Examples

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Effect test

Embodiment 1

[0041] Add 100g of finely ground molybdenum ore and 500ml of water into a GSA type 2L vertical titanium-lined autoclave. The main components of the molybdenum ore are: 5.4% molybdenum, 2.3% nickel, and 19.7% sulfur. Heat to 140°C, feed oxygen, oxygen partial pressure is 0.3MPa, control the oxidation leaching reaction temperature 150°C, and react for 3 hours. During the pressure leaching process, no other additives and catalysts are needed except oxygen. After the reaction, The ore pulp was filtered to obtain 490ml leach solution and 68.2g leach slag. The main components of the leach solution were: molybdenum 6.68g / l, nickel 4.62g / l, H 2 SO 4 27.48g / L; main components of leaching slag: molybdenum 3.12%, nickel 0.054%. During the pressure oxidation leaching process, 98.4% of nickel and about 60% of molybdenum enter the leach solution, and the rest of molybdenum enters the leaching residue in the form of molybdenum oxide. The molybdenum in the leaching slag is often recovered ...

Embodiment 2

[0046] Add 100 g of finely ground molybdenum ore and 600 ml of water into a GSA type 2L vertical titanium-lined autoclave. The main components of the molybdenum ore are: molybdenum 6.01%, nickel 2.55%, and sulfur 20.73%. Introduce 0.4MPa oxygen in advance, control the oxidation leaching reaction temperature at 180°C, and react for 3 hours. During the pressurized leaching process, no other additives and catalysts need to be added except oxygen. Composition: molybdenum 5.08g / l, nickel 4.19g / l, H 2 SO 4 31.48g / l), the nickel leaching rate is 98.6% and the molybdenum leaching rate is 49.3% in the pressure oxidation leaching process.

[0047] The molybdenum in the leaching liquid is extracted with tri-isooctylamine extractant in two-stage countercurrent, and the extraction rate of molybdenum reaches 98.5%. up to 98.5%. The magnesium salt precipitation method is used to remove impurities such as silicon, arsenic, and phosphorus in the stripping liquid. After removing phosphorus, ...

Embodiment 3

[0051] Add 100g of finely ground molybdenum ore and 300ml of water into a GSA type 2L vertical titanium-lined autoclave. The main components of the molybdenum ore are: molybdenum 5.71%, nickel 2.45%, and sulfur 21.33%. Introduce 0.2MPa oxygen in advance, control the oxidation leaching reaction temperature at 130°C, and react for 4 hours. During the pressure leaching process, no other additives and catalysts need be added except oxygen. After the reaction, the pulp is filtered to obtain 255ml leachate. Composition: molybdenum 10.08g / l, nickel 8.25g / l, H 2 SO 4 45.48g / L, the nickel leaching rate is 97.7% and the molybdenum leaching rate is 51.2% during the pressure oxidation leaching process.

[0052] The molybdenum in the leaching liquid is extracted with tri-isooctylamine extractant in two-stage countercurrent, and the extraction rate of molybdenum reaches 98.6%. up to 98%. The magnesium salt precipitation method is used to remove silicon, arsenic, phosphorus and other impu...

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Abstract

The invention discloses a method for extracting nickel and molybdenum by a nickel-molybdenum ore all-wet method, relating to the smelting of nonferrous metals by a wet method, in particular to a all-wet method for extracting nickel and molybdenum from nickel-molybdenum ores of black rock series. The method is characterized in that during extraction process, pressure oxidation leaching is carried out to the nickel-molybdenum ores milled, thus obtaining a nickel leaching solution containing nickel and molybdenum and leaching slag containing molybdenum oxides; the leaching solution undergoes extraction for separating nickel and molybdenum, thus producing nickel salt and ammonium molybdate or molybdenum trioxide; alkali steeping in a normal pressure, purification and ammonium molybdate acid deposition are carried out to molybdenum contained in the leaching slag for recycling. The method of the invention has high nickel and molybdenum recycling rate, low production cost and environmentally friendly production process.

Description

technical field [0001] The invention discloses a method for extracting molybdenum and nickel by a full-wet method of molybdenum-nickel ore, which relates to a non-ferrous metal wet smelting method, in particular a method for extracting molybdenum-nickel by a full-wet method of black rock series molybdenum-nickel ore. technical background [0002] Molybdenum and nickel are non-ferrous metal elements with excellent properties, which are widely used in stainless steel, aviation, aerospace, chemical industry, electronics and other fields. With the continuous growth of the economy, the output of the iron and steel industry continues to increase, resulting in a significant increase in the consumption of molybdenum and nickel, and the contradiction between supply and demand is relatively prominent. The development and utilization of refractory mineral resources such as molybdenum-nickel ore in black rock series has attracted more and more attention. [0003] In recent years, black...

Claims

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Application Information

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IPC IPC(8): C22B34/34C22B23/00C22B3/04
CPCY02P10/20
Inventor 蒋开喜林江顺王海北张邦胜蒋训雄汪胜东王玉芳赵磊刘三平张磊邹小平
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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