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Treatment method of jarosite slag, ternary precursor, battery-grade iron phosphate and lithium-ion battery

The technology of a jarosite slag and a treatment method is applied in the field of jarosite slag treatment, can solve the problems of ineffective utilization, complicated process flow and high production cost, and achieves low production cost, simple process flow and low production cost Effect

Active Publication Date: 2019-08-02
GUANGDONG JIANA ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method can process and utilize jarosite slag to a certain extent, and solve the problems caused by slag stockpiling, but the process involved is relatively complicated, the production cost is high, and it cannot treat all kinds of jarosite slag. effective use of ingredients

Method used

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  • Treatment method of jarosite slag, ternary precursor, battery-grade iron phosphate and lithium-ion battery
  • Treatment method of jarosite slag, ternary precursor, battery-grade iron phosphate and lithium-ion battery
  • Treatment method of jarosite slag, ternary precursor, battery-grade iron phosphate and lithium-ion battery

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Effect test

preparation example Construction

[0114] There are many methods for preparing battery-grade iron phosphate, and the direct reaction of phosphate and iron sulfate to produce iron phosphate is a common method. However, the impurity content in the ferric sulfate solution prepared by the treatment method of jarosite slag is relatively low, so it can be used as a raw material for preparing battery-grade ferric phosphate.

[0115] The ferric sulfate solution that adopts the processing method of jarosite slag to make is used as the reaction raw material of ferric phosphate, and the iron in the jarosite slag is effectively utilized, and simultaneously because other metal ion content is very low in the ferric sulfate solution, so not Can adversely affect the production of battery-grade iron phosphate.

[0116] Similar to the treatment method of the leachate, the leach residue also needs to be purified and removed. As an optional embodiment of the present invention, the leaching residue is leached by sulfuric acid, and...

Embodiment approach

[0123] As an optional embodiment of the present invention, the fluoride includes sodium fluoride or potassium fluoride, preferably sodium fluoride.

[0124] The relationship between the amount of fluoride added and the calcium ion in the crude ferrous sulfate solution follows the stoichiometric ratio. In order to fully remove calcium ions in the crude ferrous sulfate solution, the amount of fluoride added can be slightly higher than the theoretical amount of calcium ions. As an optional embodiment of the present invention, the amount of fluoride added is 1.2 to 1.35 times the theoretical amount of calcium ions in the crude ferrous sulfate solution; a typical but non-limiting amount of added fluoride is crude ferrous sulfate The multiple of the theoretical dosage of calcium ions in the solution is, for example, 1.2 times, 1.25 times, 1.3 times or 1.35 times.

[0125] As an optional embodiment of the present invention, the fluoride is sodium fluoride, and the pH of the solution...

Embodiment 1

[0154] The present embodiment provides a kind of processing method of jarosite slag, comprises the following steps:

[0155] (a) Mix jarosite slag and water at a mass ratio of 1:0.4 to make a paste, freeze and freeze rapidly at -15°C, then dry under a pressure of 5 Pa, and then use 20mm, 10mm, 5mm and 2mm ceramic balls are used as the ball milling medium, each diameter of the ball accounts for 1 / 4, and the dried jarosite slag is ball milled, and the pulverized jarosite slag particles are less than 75 μm;

[0156] Mix the pulverized jarosite slag and water at a mass ratio of 1:4 to make slurry, ultrasonically treat it and feed compressed air at the same time, the flow rate of compressed air is 1m 3 / h, the ultrasonic time is 0.8h, after the ultrasonic is finished, the leaching solution and leaching residue are obtained;

[0157] (b) leach solution treatment: add 1.1 times of manganese elemental powder of copper molar content to leach solution, replace and remove copper and obt...

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Abstract

The invention provides a treatment method for sodium jarosite slag, a ternary precursor, a battery-grade iron phosphate and a lithium ion battery, which relate to the technical field of sodium jarosite slag treatment. According to the treatment method, after crushed sodium jarosite slag is ultrasonically treated, leachate and leaching residue are produced; according to the different varieties andcontents of contained valuable metals, the leachate is purified twice by manganese and manganese fluoride, so that a purified solution containing nickel, cobalt and manganese is produced; the purifiedsolution containing nickel, cobalt and manganese can be widely applied as a multi-substance material in various fields, and preferably, the purified solution containing nickel, cobalt and manganese can be applied as a reaction material for the ternary precursor in the field of lithium ion batteries. The treatment method for sodium jarosite slag can sufficiently recycle valuable metals in leachate, the process flow is simple and easy to operate, the production cost is low, and the treatment method for sodium jarosite slag is suitable for industrialized mass production. The invention further provides the ternary precursor, the battery-grade iron phosphate or the lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of jarosite slag treatment, in particular to a treatment method for jarosite slag, a ternary precursor, battery-grade iron phosphate and a lithium ion battery. Background technique [0002] In the hydrometallurgy of cobalt and nickel, iron is an impurity that needs to be removed. At present, jarosite with good filtration performance is widely used to remove iron. However, when the iron content is high, part of the iron hydroxide precipitation will be formed during the iron removal process by this process. This precipitation has the adsorption property of colloid and is easy to adsorb the metal ions in the solution. Therefore, the jarosite slag produced by cobalt-nickel wet smelting and iron removal contains a certain amount of non-ferrous metals such as cobalt, nickel, copper, manganese, lead, etc., resulting in the loss of non-ferrous metals. In addition, after a large amount of jarosite slag is piled up f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/37H01M4/58H01M10/0525
CPCC01B25/375C01P2006/40H01M4/5825H01M10/0525Y02E60/10
Inventor 陈耀吴理觉文定强郭欢高琦
Owner GUANGDONG JIANA ENERGY TECH CO LTD
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