Lithium Battery Black Mass Roasting Kiln

Products Detail

Lithium battery black mass roasting kiln developed and manufactured a new type of energy-saving kiln. The furnace temperature control is even, long service life, stable operation, equipped with inert gas protection. The oxygen content in the kiln is <2%, which is suitable for lithium battery black matter reduction roasting kiln. Black powder by adding sulfuric acid, carbon powder under high temperature heating for reduction reaction, so as to get lithium carbonate and lithium salt. So as to achieve the purpose of priority lithium extraction. Or the black powder is directly passed into the oxygen for oxidation roasting, so as to get lithium carbonate.

The method of lithium extraction from waste lithium battery black powder by pressurised roasting and solidification of fluorine, the main steps include:

(1) disassembling the waste lithium battery to obtain black powder. Add a fluorine fixing agent to the black powder. After mixing, carry out pressure roasting to obtain clinker powder;

(2) Add water to the clinker powder and mix well to make a slurry, and then pass carbon dioxide gas into the slurry for reaction, and obtain a lithium-containing solution by solid-liquid separation;

(3) The lithium-containing solution is heated and decomposed to obtain high-purity lithium carbonate. The present invention has the ability to efficiently extract and recycle many types of lithium metal such as lithium nickel cobalt manganese oxide, lithium fluoride, lithium phosphate, lithium hexafluorophosphate, and other lithium metals from waste lithium battery materials.  

At the same time to achieve the technical characteristics of curing impurity fluorine. Effectively solve the technical problems of different lithium battery types with different forms of lithium binding, low recovery rate, high fluorine impurity content and low quality of lithium products. Combustible gas and organic waste gas at the back end of the cracking are burned. The furnace is heated so as to achieve comprehensive calorific value reuse of the combustible gas. The positive and negative electrode sheets after cracking enter the de-powdering system. Then it is crushed, pulverised, air-selected, screened and gravity sorted to separate the black matter, iron and copper, aluminium and iron separately. The waste gas generated after cracking. Then through the combustion chamber, cooling tower, dust collector, spray tower, RTO, chimney discharge, etc., the exhaust gas is purified and discharged to meet the standard.  

High value high temperature metal reduction: Develop high-temperature roasting technology for high-value metals for ternary batteries. Through high temperature roasting system. In the temperature interval of 600℃-750℃. Adopt gas, carbon, natural gas or sulfuric acid as the reactant. Make the anode material react with the reactant. Destroy the layer structure of LiNiMn2O4, and lithium migrates to the surface. Facilitate hydrometallurgical recovery.  

Raw Materials

Battery materials, ternary black powder, lithium iron black powder, anode powder, etc.  

Advantageous

1. Adopting new AC frequency conversion speed control technology, more energy-saving and environmentally friendly, with high accuracy of speed control.

2. Overall structured design, solving the problem of leakage and conveying, which is common in the same type of rotary kiln.

3. easy to use, convenient maintenance, adjustable parameters, good compatibility

4. high organic matter removal rate, high value product quality

5. Furnace body is made of heat-resistant alloy steel. Good heat resistance and corrosion resistance

6. The furnace lining adopts lightweight refractory material and refractory cotton, with good heat preservation effect and high thermal efficiency of the equipment

7. PLC intelligent control system is adopted, humanised design, convenient operation and maintenance. Safe and stable

Technological Process

In the process of reducing roaster. The rotary kiln cylinder has a small inclination. The material moves continuously from the feed end to the discharge end. The kiln is in continuous, automatic operation. Direct material transport is possible, for different materials. Customised design of the rotary kiln cylinder with inclination along its length, rotary cylinder readings and add-on components on the welded cylinder. The rotary kiln is designed for pyrolytic processing of minute, granular, lumpy, dry and wet mixes. The main applications are: drying, desorption, pre-calcining, calcining, foaming and sintering.