Rotary kiln lining for roasting lithium battery positive electrode material and preparation method of rotary kiln lining
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A technology for positive electrode materials and rotary kilns, which can be applied to furnace linings, drum furnaces, furnaces, etc., and can solve problems that have not been reported.
Active Publication Date: 2021-07-30
WUHAN UNIV OF SCI & TECH
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Problems solved by technology
However, most of the existing technologies for preparing rotary kiln linings are used for roasting cement, ceramsite and other building materials, and a few are used for roasting refractory materials, while the rotary kiln lining technology for roasting lithium battery cathode materials has not been reported.
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Embodiment 1
[0034] A rotary kiln lining for firing lithium battery cathode materials and a preparation method thereof. The preparation method described in this specific embodiment:
[0035] Mix 52.0wt% fused magnesia, 43.0wt% calcined magnesia, 1.5wt% activated alumina micropowder, 2.3wt% ferrous oxide and 1.2wt% binding agent to obtain a mixture; The mixture was molded and kept at 150° C. for 6 hours to obtain a rotary kiln lining for firing lithium battery anode materials.
[0036] The binding agent is zirconium phosphate.
[0037] The forming is pressure forming.
Embodiment 2
[0039] A rotary kiln lining for firing lithium battery cathode materials and a preparation method thereof. The preparation method described in this specific embodiment:
[0040] Mix 56wt% fused magnesia, 39wt% calcined magnesia, 4.5wt% activated alumina micropowder, 0.3wt% ferrous oxide and 0.2wt% binding agent to obtain a mixture; The mixture was molded, and kept at 160° C. for 5 hours to obtain a rotary kiln lining for firing lithium battery cathode materials.
[0041] The binding agent is aluminum dihydrogen phosphate.
[0042] The molding is casting molding.
Embodiment 3
[0044] A rotary kiln lining for firing lithium battery cathode materials and a preparation method thereof. The preparation method described in this specific embodiment:
[0045] Mix 58wt% fused magnesia, 34wt% calcined magnesia, 2.7wt% activated alumina micropowder, 3.3wt% ferrous oxide and 2.0wt% binding agent to obtain a mixture; The mixture was molded, and kept at 170° C. for 4 hours to obtain a rotary kiln lining for firing lithium battery cathode materials.
[0046] The binding agent is aluminum dihydrogen phosphate.
[0047] The molding is smear molding.
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Abstract
The invention relates to a rotary kiln lining for roasting a lithium battery positive electrode material and a preparation method of the rotary kiln lining. According to the technical schemes, the preparation method comprises the following steps of: uniformly mixing 52.0 to 67.0 weight percent of fused magnesite, 28.0 to 43.0 weight percent of light-burned magnesite, 0.5 to 4.5 weight percent of activated aluminum oxide micro powder, 0.3 to 3.3 weight percent of ferrous oxide and 0.2 to 4.0 weight percent of binding agent to obtain a mixture; and molding the mixture, and carrying out heat preservation at 150-180 DEG C for 3-6 hours to prepare the rotary kiln lining for roasting the lithium battery positive electrode material. The binding agent is one of zirconium phosphate, magnesium phosphate and aluminum dihydrogen phosphate; and the molding mode is one of pressurizing, pouring, ramming and smearing. The method has the characteristics of simple process, high productivity, time-saving performance and high efficiency. The prepared rotary kiln lining for roasting the positive electrode material of the lithium battery is good in corrosion resistance, relatively good in stripping resistance and long in service life; and the performance of the roasted lithium battery positive electrode material can be fundamentally improved.
Description
technical field [0001] The invention belongs to the technical field of rotary kiln lining for roasting. In particular, the invention relates to a rotary kiln lining for roasting positive electrode materials of lithium batteries and a preparation method thereof. Background technique [0002] The safety and performance of electronic equipment and electric vehicles are closely related to the capacity and efficiency of batteries. Therefore, the development of high-performance lithium battery materials with high stability and high energy density has become a hot research project in recent years. The positive electrode material of the lithium battery is composed of Li, Co, Mn and Ni, etc., and its preparation process is usually to pack the raw materials in a sagger and burn them at 400-1000°C. During this process, the Li and Co compounds melt and infiltrate into the pores of the sagger, and react with the constituent components to induce cracks and peeling off of the sagger body....
Claims
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