Production process for dry method extraction of nickel

Abstract

The invention provides a kind of dry method withdraws the nickel the production method, it is take the petroleum majoring in engineering industry expelling spent catalyst, the waste sweetening agent or withdraws Gao Linhan after the aqueous method which the vanadium molybdenum expels the vanadium low nickel residual second pollutant as nickel raw material smelting to produce the ferronickel the technology, it according to the fertilizer conformity, the weighing mixture, the reducing smelting and oxidizes fining the step to carry on, in the dual alkali degree CaO% / SiO2% approximately 0.8~~1.8 scope, with the coke, the ferrosilicon makes the reducing agent to carry on the reducing smelting to remove 60~~70% phosphorus, again in in the slag dual Alkali degree CaO% / SiO2% approximately 1.2~~3.5 scope, selects the oxygen - iron ore union oxidation method, May cause 99% above the phosphorus and 98% above vanadium union produces CaO.P2O5 and CaO.V2O5 enters the slag, after refines the qualified ferronickel product, realizes from Gao Linhan in the vanadium nickel waste material the short flow, the low cost, the industry withdraws the nickel the goal, has the remarkable economic efficiency and the social environmental protection effect.

Description

Technical field: [0001] The invention relates to a smelting technology for separating and extracting metals by means of fire, which belongs to the technical field of metallurgical engineering, in particular to a production technology for smelting nickel-iron alloys from high-phosphorus vanadium-containing nickel waste discarded in the petrochemical industry, specifically a kind of The production method of nickel extraction by fire method. Background technique: [0002] As we all know, nickel is an important alloying element in the metallurgical industry. Due to the unique properties of nickel metal, it is widely used in the production of special steel, high-temperature alloys, precision alloys, heat-resistant alloys, shape memory alloys, hydrogen storage alloys, electronic and electrical batteries, and magnetic materials. It has a very wide range of applications in many technical fields such as sensors, chemical catalysts, etc. Nickel alloy materials occupy a very important ...

AI Technical Summary

Problems solved by technology

After years of research, our company has successfully extracted vanadium and molybdenum metals from nickel-containing waste catalysts and waste desulfurizers by wet method, and has carried out industrialized production of vanadium and molybdenum extraction. This technology has been applied to the State Intellectual Property Office Invention patent (patent application number: 200410021725.5), but the nickel-containing residue waste after wet extraction of vanadium and molybdenum is still discarded, and at most it is used as a nickel-containing raw material for wet nickel extraction plants.

Because it is difficult to extract qualified nickel from this nickel-containing material by using the traditional wet method, the main reason is that there are technical difficulties such as high acid consumption, high operating cost and low nickel leaching rate in wet nickel extraction, and phosphorus, vanadium and The purification technology of molybdenum is very difficult, and the barely produced nickel plate is also difficult to meet the quality requirements. According to the existing production practice and literature records: when the low-phosphorus nickel-containing material with a phosphorus content of less than 0.05% is pyro-smelted, phosphorus can be obtained. The qualified products of nickel-iron alloy or metallic nickel whose content is up to the standard, and high-phosphorus vanadium-nickel materials with a phosphorus content higher than 0.2% are subjected to pyrometallurgy, because the content of phosphorus fluctuates greatly with the content of nickel in the raw material, so The content of phosphorus in the obtained nickel-iron alloy or metal nickel product has been as high as more than 2.0%. In fact, the nickel-iron alloy with a phosphorus content higher than 2.0% has no use value in the material industry, especially for high phosphorus, vanadium and low nickel. When using traditional pyrometallurgical methods such as smelting nickel matte, casting anodes, and electrolysis, it is necessary to artificially add vulcanizing agents in the early stage of smelting, and to solve the technical problem of sulfur pollution in the later stage. This pyrometallurgical process is long and difficult. The production cost is very high, and it is difficult to popularize and apply in actual production

According to measurements, the nickel-containing waste catalysts and waste desulfurizers discarded by the petroleum industry contain about 2∽5% nickel and V 2 o 5 It is about 8∽16%, the molybdenum content is about 2∽5%, and the phosphorus content is as high as 0.3∽1%. This is a typical waste with high phosphorus, vanadium and low nickel that is very difficult to handle. So far, petroleum The production technology of nickel-containing waste catalysts and waste desulfurizers discarded by industry has not been reported at home and abroad so far.

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