A kind of nickel ore pressure leaching method

Abstract

The invention belongs to the technical field of nickel mineral smelting and particularly relates to a nickel mineral pressurization leaching method. An anolyte storage tank, a slurrying tank, a thickener, a pressurization pump material supply tank, a pressurization pump, a slurry heater and a pressurization reactor are included. A bottom opening of the anolyte storage tank is connected to a pump A inlet through a pipeline. A pump A outlet is connected to an upper inlet of the slurrying tank through a pipeline. The thickener is connected to the upper portion of the slurrying tank through a pipeline. A bottom opening of the slurrying tank is connected to a pump B inlet through a pipeline. A pump B outlet is connected to an upper inlet of the pressurization pump material supply tank through a pipeline. A bottom opening of the material supply tank is connected to a pressurization pump inlet through a pipeline. A pressurization pump outlet is connected to a slurry heater inlet through a pipeline. A slurry heater outlet is connected to a pressurization reactor inlet through a pipeline. According to the nickel mineral pressurization leaching method, the operation temperature of the heater is lowered, the material flow speed is increased, the tube pass of a heat exchange tube is shortened, the residence time of materials in the slurry heater is reduced, thus the number of times of cleaning of the slurry heater is lowered to be 0.1 time / month, the number of times of damage to the pressurization pump is lowered to be 1.3 time / month, the probability of blocking of a heating tube is reduced obviously, and usage time of the slurry heater is prolonged.

Description

technical field [0001] The invention belongs to the technical field of nickel ore smelting, and in particular relates to a pressure leaching method for nickel ore. Background technique [0002] Nickel, almost silver-white, hard and ductile and ferromagnetic metal element, it can be highly polished and corrosion-resistant, mainly used in the preparation of alloys and catalysts. Xinjiang is rich in nickel ore resources, and Fukang Smelter took the lead in producing Xinjiang's first nickel plate by wet process. However, problems such as blockage of the slurry heater, increased pressure of the booster pump, decreased flow rate, and damage to the booster pump often occur during the production process. On average, the booster pump is repaired 2.8 times per month, and the slurry heater is cleaned 1.85 times, which seriously affects production efficiency and increases the labor intensity of employees. Contents of the invention [0003] In view of the above problems, the present ...

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Problems solved by technology

[0003] In view of the above problems, the present invention proposes a nickel ore pressurized leaching method. By optimizing the process parameters and improving the process flow, the problem of blockage and cleaning of the slurry heater is effectively solved, the production efficiency of the system is obviously improved, and the labor of employees is reduced. Labor intensity

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