Ordinary-pressure and high-temperature acid leaching equipment for nickel laterite ore

Abstract

The invention discloses ordinary-pressure and high-temperature acid leaching equipment for nickel laterite ore, and relates to the technical field of mixing and stirring reaction equipment. The ordinary-pressure and high-temperature acid leaching equipment has the benefits that by virtue of a vertical speed adjusting motor mounted on a vertical tank and a horizontal mixing and stirring screw column in the vertical tank, the sufficient and uniform mixing of high-temperature sulfuric acid and ore pulp is realized; by virtue of a horizontal speed adjusting motor mounted on one side of a horizontal reaction tank body and the horizontal mixing and stirring screw column in the horizontal reaction tank body, a mixed material stirring reaction is realized; moreover, mixed materials can be conveyed and discharged, and the design that the curved surfaces of two screw pieces are opposite enables the mixture to perform reciprocating motion, so that the mixture sufficiently reacts. Through comprehensive analysis of the numerical value of vitriolic acid flux, ore pulp flux and a temperature transmitter on a control cabinet, the rotating speeds of the horizontal speed adjusting motor and the vertical speed adjusting motor are controlled according to the obtained numerical values, so that an optimum stirring effect can be realized. An exhaust gas collection port can be used for discharging gas accumulated in the horizontal reaction tank body timely, so that the pressure balance in the horizontal reaction tank body is guaranteed, and the safety of the whole equipment is improved.

Description

technical field [0001] The invention relates to a mixing and stirring reaction equipment, in particular to an equipment for acid leaching laterite nickel ore under normal pressure and high temperature. Background technique [0002] At present, according to the process plan of extracting metallic nickel by leaching laterite nickel ore under atmospheric pressure, it is necessary to first make laterite nickel ore powder (particle size ≤ 0.015mm) into a slurry with a concentration of 30%, and then heat it to 65°C and then mix it with a slurry at a temperature of 135°C. 98% sulfuric acid mixed reaction, considering the strong corrosiveness of sulfuric acid and the violent heat release after mixing with ore pulp, there was no corrosion-resistant and continuous production equipment in the field of atmospheric pressure leaching laterite nickel ore before, mainly relying on pits or Tank heap leaching, in this way, it is difficult for materials to mix uniformly and fully react, and ...

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Problems solved by technology

[0002] At present, according to the process plan of extracting metallic nickel by leaching laterite nickel ore under atmospheric pressure, it is necessary to first make laterite nickel ore powder (particle size ≤0.015mm) into a concentration of 30 % pulp, heated to 65°C and mixed with 98% sulfuric acid at a temperature of 135°C, considering the strong corrosiveness of sulfuric acid and the intense heat release after mixing with the pulp, the field of laterite nickel ore leaching at atmospheric pressure was previously There is no corrosion-resistant and continuous production equipment inside, and it mainly relies on pit or tank heap leaching, so it is difficult for materials to mix uniformly and fully react, and it is also difficult to achieve continuous production, and there is more manual participation and a higher degree of risk

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