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

A technology of nickel pig iron and iron phosphate, which is applied in the field of nickel-containing pig iron to prepare nickel sulfate solution and battery-grade iron phosphate, can solve the problems of large consumption of auxiliary materials, difficult promotion, high energy consumption, etc., and achieve the goal of reducing processing costs and improving utilization value Effect

Active Publication Date: 2017-06-13
GUANGDONG JIANA ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because of the large consumption of auxiliary mate

Method used

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

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Effect test

Embodiment 1

[0026] The invention discloses a method for preparing nickel sulfate solution and battery-grade iron phosphate from nickel-containing pig iron, which comprises the following steps:

[0027] (1) Pretreatment of raw materials, nickel-containing pig iron is dried, crushed into powder, and sieved for component detection;

[0028] (2) Acid leaching treatment, use mixed acid to carry out atmospheric pressure acid leaching on the undersize obtained in step (1), and obtain the filtrate after solid-liquid separation, the acid leaching temperature is 50-90°C, and the acid leaching time is 3-8 Hour;

[0029] (3) Precipitation treatment, under the condition of using a precipitating agent to maintain the pH value of the filtrate in step (2), add an oxidizing agent to oxidize the ferrous iron in the filtrate at the same time, use the controlled crystallization method to prepare iron phosphate precipitation, filter and wash after the reaction After obtaining nickel-containing filtrate and i...

Embodiment 2

[0035] The invention discloses a method for preparing nickel sulfate solution and battery-grade iron phosphate from nickel-containing pig iron, which comprises the following steps:

[0036] (1) Pretreatment of raw materials, nickel-containing pig iron is dried, crushed into powder, and sieved for component testing;

[0037] (2) Acid leaching treatment, use mixed acid to carry out atmospheric pressure acid leaching on the undersize obtained in step (1), and obtain the filtrate after solid-liquid separation, the acid leaching temperature is 50-90°C, and the acid leaching time is 3-8 Hour;

[0038] (3) Precipitation treatment, under the condition of using a precipitating agent to maintain the pH value of the filtrate in step (2), add an oxidizing agent to oxidize the ferrous iron in the filtrate at the same time, use the controlled crystallization method to prepare iron phosphate precipitation, filter and wash after the reaction After obtaining nickel-containing filtrate and iro...

Embodiment 3

[0044] The invention discloses a method for preparing nickel sulfate solution and battery-grade iron phosphate from nickel-containing pig iron, which comprises the following steps:

[0045] (1) Pretreatment of raw materials, nickel-containing pig iron is dried, crushed into powder, and sieved for component testing;

[0046] (2) Acid leaching treatment, use mixed acid to carry out atmospheric pressure acid leaching on the undersize obtained in step (1), and obtain the filtrate after solid-liquid separation, the acid leaching temperature is 50-90°C, and the acid leaching time is 3-8 Hour;

[0047] (3) Precipitation treatment, under the condition of using a precipitating agent to maintain the pH value of the filtrate in step (2), add an oxidizing agent to oxidize the ferrous iron in the filtrate at the same time, use the controlled crystallization method to prepare iron phosphate precipitation, filter and wash after the reaction After obtaining nickel-containing filtrate and iro...

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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...

Claims

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Application Information

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IPC IPC(8): C01B25/37C01G53/10
CPCC01B25/375C01G53/003C01G53/10C01P2004/51C01P2006/11C01P2006/40
Inventor 李文津文定强付海阔
Owner GUANGDONG JIANA ENERGY TECH CO LTD
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