In recent years, the rise of new energy vehicles has driven lithium Battery Development of. along with “ Bicarbon ” The process continues to advance, the new energy and new materials industry continues to enjoy a high prosperity, and the lithium battery industry has made great progress all the way. The lithium battery market in China mainly benefits from the explosive growth of the new energy vehicle industry ， As lithium batteries are used more and more widely, in order to meet the use requirements of people, enterprises are constantly expanding their production scale. In addition, as the world continues to advocate energy conservation and environmental protection, enterprises respond to “ Energy saving and environmental protection ” Concept, the multiple use nature of lithium battery, in line with energy conservation and environmental protection ” Therefore, enterprises in all countries in the world are producing in large quantities.
The three major links in the production of ternary materials for lithium batteries are mixing Abrasive materials High temperature sintering, crushing and decomposition, the control of each link and the performance of the equipment will have a direct or indirect impact on the final product. Among the cathode materials of lithium batteries Li two COO two 。 At present, Li two COO two Mainly used Li two CO three and coc o3 Synthesized.
one kind Tunnel kiln The method for preparing battery grade lithium carbonate by roasting and extracting lithium comprises the following specific steps:
one Mixing of ingredients: lithia mica Sulfate, calcium salt and sulfuric acid are accurately weighed and metered, and transported to the mixer for uniform mixing to obtain raw material mixture;
two Tunnel kiln roasting: s1 After being transported to the tunnel kiln system eight hundred and fifty ℃-1100℃ Roasting at high temperature 30-300min And then forced air cooling to ≤150 ℃ , automatic unloading;
three Grinding: s2 Dry powder grinding is adopted for calcined materials, and the particle size after grinding is controlled at 100-250 Target proportion ≥95 ％；
four Leaching: towards s3 Water is added into the powder to be slurried, and the reverse washing process is adopted to control the concentration of lithium oxide in the leaching solution to 15-35g/l Then, filter and separate the filtrate and filter residue through belt filter, where the filter residue is cleaned and filtered by two-stage slurry washing and rinsing process, and the filtrate is combined.
During the calcination of lithicite ore in tunnel kiln, the temperature is 850℃-1100℃ between, lithia mica The concentrate contains some fluoride , Past Sulphates roasting Difficulty in fluorine fixation , It is easy to produce hydrofluoric acid in the reaction equipment, which will cause corrosion of the equipment 。 The flue gas generated at high temperature is mixed with hydrofluoric acid, and the concentration of hydrofluoric acid is 5% About, it is highly corrosive to refractory bricks, which is also a particular headache for customers. Zhisheng Weihua carefully analyzed and discussed the above problems, and launched this material ZS-822 Composite ceramic high-temperature anti-corrosion materials to solve customer problems.
ZS-822 Composite ceramic high temperature resistant anti-corrosion coating is High temperature resistant silicon grafted under high temperature and pressure -- Fluorine modified solution film-forming solution, temperature resistance can reach one thousand and four hundred ℃ 。 The main components of paint pigment are yttrium rare earth micro powder, composite α— Ceramic powder, silicon carbide, etc. are finely processed under closed high temperature. The paint has high temperature resistance, forming dense ceramic glaze under high temperature, and its hardness can reach 7H The coating is smooth, self-cleaning, impact resistant, long-term acid and alkali resistance, strong adhesion, water and oil resistance, and can also withstand the corrosion of organic solvents.
Product features: ① Good film-forming material ---- High temperature silicon fluoride solution, high temperature resistance, good adhesion, strong anti-aging performance.
② High temperature resistance of coating, ZS-822 The composite ceramic high-temperature anti-corrosion coating can withstand the temperature for a long time up to one thousand and four hundred ℃ , fire-resistant barbecue, no change.
③ , forming hard and dense glaze under high temperature, ZS-822 Composite ceramic high-temperature anti-corrosion coating at high temperature one thousand and two hundred ℃ It can form a hard and dense ceramic glaze with high hardness, smooth self-cleaning, acid and alkali resistance for a long time, and can also resist the corrosion of organic solvents.
④ Long term anti-corrosion: ZS-822 The composite ceramic high-temperature anti-corrosion coating has excellent corrosion resistance, resistance to strong acid and alkali for a long time, resistance to organic solvent corrosion, water and oil resistance.
⑤ Good adhesion: ZS-822 The composite ceramic high-temperature anti-corrosion coating will undergo re fusion reaction at high temperature, and its adhesion to the matrix will be strengthened again. The oxide ultrafine powder in the coating helps the coating form a compact and firm coating, so that its comprehensive thermodynamic properties match the physical properties of the matrix, and can protect the matrix well.
⑥ Wear resistance: ZS-822 Fine ceramic powder functional filler of composite ceramic high-temperature anti-corrosion coating, dense ceramic glaze under high temperature fusion, high hardness, good wear resistance, can withstand the corrosion and friction of liquid, gas, dust particles for a long time.
⑦ Long service life of coating ： ZS-822 The fine inorganic material and high-tech high-temperature solution in the composite ceramic high-temperature anti-corrosion paint pigment can be used for a long time in corrosive environment, and is not easy to age, wear and corrosion.
If you have lithium battery industry - For the problem of high temperature corrosion prevention of kiln, please consult our Zhisheng Weihua Guogong at any time to develop a detailed solution for you.
