Method and system for processing high-iron laterite nickel ore

Abstract

The invention discloses a method and system for processing high-iron laterite nickel ore. The content of iron in the high-iron laterite nickel ore is not lower than 30 wt%. The method comprises the steps that 1, the high-iron laterite nickel ore, reducing agents and additives are mixed to prepare a ball, and a mixed pellet is obtained; 2, the mixed pellet is dried, and a dried pellet is obtained; 3, the dried pellet is subjected to reducing roasting processing, and a metalized pellet is obtained; 4, the metalized pellet is subjected to water quenching processing; 5, the metalized pellet which is subjected to water quenching processing and obtained through the step 4 is subjected to ore grinding magnetic separation processing, and an iron material containing nickel and tailings are obtained; 6, the iron material containing the nickel is subjected to rusting processing, and hydrated ferric oxide and a leaching agent rich in the nickel and cobalt are obtained; and 7, the leaching agent rich in the nickel and the cobalt is subjected to separation and purification, and metal nickel and metal cobalt are obtained. By means of the method for processing the high-iron laterite nickel ore, the problems that obtained product nickel is low in grade and production rate when the high-iron laterite nickel ore is processed through a traditional smelting technology can be solved, and the high-iron laterite nickel ore can be effectively used.

Description

technical field

[0001] The invention belongs to the technical field of metallurgy, in particular, the invention relates to a method and system for processing high-iron laterite nickel ore. Background technique

[0002] Nickel is an important non-ferrous metal, mainly smelted from laterite nickel ore and nickel sulfide ore. Due to the continuous increase of nickel consumption and the continuous decrease of nickel sulfide ore reserves in recent years, the development of nickel laterite ore has been paid more and more attention. The lateritic nickel ore is basically divided into two types, one is limonite type, located in the upper part of the deposit, due to the result of weathering and leaching, there is more iron, less silicon, less magnesium, lower nickel, but higher cobalt content , this kind of ore should be treated by hydrometallurgical process, and the slag produced by smelting ferronickel is used for steel production; the other type is silicon-magnesium-nickel ore, wh...

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