A method for comprehensive recovery of valuable metals in high magnesium silicon laterite nickel ore

A high-magnesium-silicon laterite and valuable metal technology, applied in the field of metallurgy, can solve problems such as waste of resources, large consumption of nickel acid, environmental pollution, etc., and achieve the effects of reducing enterprise costs, increasing enterprise income, and being environmentally friendly
CN109136541BActive Publication Date: 2020-05-15KUNMING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
KUNMING UNIV OF SCI & TECH
Publication Date
2020-05-15

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Abstract

The invention relates to a method for comprehensively recovering valuable metals from high-magnesium-silicon laterite nickel ore, and belongs to the technical field of metallurgy. The method comprisesthe following steps: crushing high-magnesium-silicon laterite nickel ore to be -200 meshes to obtain high-magnesium-silicon laterite nickel ore powder, then uniformly mixing the high-magnesium-silicon laterite nickel ore powder with an additive and pressing the mixture into a cylindrical material, then treating the cylindrical material at constant temperature of 700-900 DEG C for 40-60 min, and performing cooling with a furnace to obtain a mixed material A; uniformly mixing the mixed material A and a reducing agent and pressing the mixture into a material sheet with diameter of 10-30 mm; placing the material sheet in a vacuum furnace, performing vacuumizing until inlet pressure is lower than 50 Pa, performing heating at constant rate of 3-5 DEG C / min until the temperature is 650-900 DEG C, then performing heating at constant rate of 10-15 DEG C / min until the temperature is 1300-1600 DEG C, and performing treatment at constant temperature for 0.5-4 h to obtain magnesium vapor and slag;condensing and crystallizing the magnesium vapor to obtain metallic magnesium, cooling the slag with the furnace to a temperature not higher than 100 DEG C, and taking out the slag; magnetically separating the slag to obtain ferronickel and calcium silicon compounds.
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Description

technical field

[0001] The invention relates to a method for comprehensively recovering valuable metals in high-magnesium-silicon laterite-nickel ore, belonging to the technical field of metallurgy. Background technique

[0002] High-magnesium silicon laterite nickel ore, also known as silicon magnesium nickel ore, is characterized by relatively high magnesium, silicon, and nickel content, and low iron content. During the formation of such minerals, nickel and magnesium are stored in snakes through lattice substitution. Among them, serpentine is an ore that is extremely difficult to destroy, so this kind of mineral is suitable for extraction by pyrometallurgy. Among them, the relatively mature pyrometallurgical smelting process includes: rotary kiln drying pre-reduction-electric furnace smelting method (also known as " RKEF"), sintering-blast furnace reduction smelting, sintering-blast furnace reduction vulcanization smelting, reduction roasting-magnetic separation process, ...

Claims

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