Method for preparing nickel sulfate solution and battery grade ferric phosphate from nickel-containing pig iron

Abstract

The invention discloses a method for preparing a nickel sulfate solution and battery grade ferric phosphate from nickel-containing pig iron. The method comprises the following steps of carrying out raw materials pretreatment, acid leaching treatment, sedimentation treatment, ferric phosphate drying treatment, nickel-containing filtrate extraction treatment and reverse extraction to obtain the nickel sulfate solution. The method for preparing the nickel sulfate solution and the battery grade ferric phosphate from the nickel-containing pig iron has the characteristics of simpleness in technology, high recovery rate of the nickel-containing pig iron, low cost and good performance of a product.

Description

technical field

[0001] The invention relates to the technical fields of metallurgy and new energy materials, in particular to a method for preparing nickel sulfate solution and battery-grade iron phosphate from nickel-containing pig iron. Background technique

[0002] In recent years, with the depletion of high-grade nickel sulfide ore and over-exploitation of nickel oxide ore, low-grade laterite nickel ore has become the main raw material for the production of nickel-containing pig iron. In order to solve the problem of rational utilization of laterite nickel ore, low-grade laterite nickel ore is used as raw material, coal powder is used as reducing agent, and the nickel and iron oxides in the ore are reduced and enriched into medium and low nickel pig iron by direct high-temperature reduction method. At present, the research on the industrial application of medium and low nickel pig iron only stays at the level of using it as a raw material for smelting stainless steel, an...

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