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Fast cooling method for lithium iron phosphate steel belt type reducing furnace

A technology of lithium iron phosphate and lithium phosphate, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of small output, no rapid cooling, difficult process adjustment and quality control, etc., to achieve large output, Facilitate process adjustment and quality control, facilitate installation, maintenance and dismantling effects

Inactive Publication Date: 2009-07-08
ADVANCED FOR MATERIALS & EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the sintering production of lithium iron phosphate generally adopts mesh belt sintering furnace. The whole set of equipment is composed of four parts, namely furnace body, transmission system, electrical system and atmosphere control system. The furnace body is composed of feeding belt, feeding section and pre-burning section , sintering section, and discharge section, without rapid cooling, there are shortcomings of small output, difficult process adjustment and quality control

Method used

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  • Fast cooling method for lithium iron phosphate steel belt type reducing furnace
  • Fast cooling method for lithium iron phosphate steel belt type reducing furnace
  • Fast cooling method for lithium iron phosphate steel belt type reducing furnace

Examples

Experimental program
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Effect test

Embodiment 1

[0020] see Figure 5 , lithium iron phosphate is added to the steel belt of the steel belt reduction furnace through the feeding part 2, and then sintered through the pre-sintering section 3 and the sintering section 4, and then enters the rapid cooling device 5 for rapid cooling, and the cooling rate is: 8.8 ° C / min, the lithium iron phosphate is rapidly cooled by the rapid cooling device 5 and then discharged through the discharge section 6 to complete the overall sintering process.

[0021] Thermocouple measurement length: 11 meters; running time: 193 minutes; available network speed: 11000 / 193 = 57mm / min; time required to run 1 meter: 1000 / 57 = 17.54min; start fast cooling length: 11 -1.2=9.8 meters, required time: 9800 / 57=172 minutes, the length of fast cooling end is: 11-0.2=10.8 meters, required time: 10800 / 57=189.5min;

[0022] The corresponding temperature at the beginning of rapid cooling is: 266°C; the temperature at the end of rapid cooling is 111°C; the cooling...

Embodiment 2

[0024] see Image 6 , lithium iron phosphate is added to the steel belt of the steel belt reduction furnace through the feeding part 2, and then sintered through the pre-sintering section 3 and the sintering section 4, and then enters the rapid cooling device 5 for rapid cooling, and the cooling rate is: 15.8 ° C / min, the lithium iron phosphate is rapidly cooled by the rapid cooling device 5 and then discharged through the discharge section 6 to complete the overall sintering process.

[0025] Mesh belt length: 11 meters; running time: 191 minutes; available network speed: 11000 / 191=57.6mm / min; time required to run 1 meter: 1000 / 57.6=17.36min; initial network speed: 85mm / min; after 20 minutes, adjust to: 54mm / min; initial net speed running length: 85*20=1700mm, start fast cooling time: (10800-1700) / 54=168.5min; fast cooling end time: 168.5+ 1000 / 54=187min;

[0026] The corresponding temperature at the beginning of rapid cooling is: 388 degrees; the temperature at the end ...

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Abstract

The invention discloses a quick cooling method for a lithium iron phosphate steel band type reducing furnace, which comprises the following steps: adding lithium iron phosphate onto a steel band of the steel band type reducing furnace through a feeding section, then sintering the lithium iron phosphate through a pre-burning section and a sintering section, quickly cooling the sintered lithium iron phosphate, and discharging the quickly-cooled lithium iron phosphate through a discharging section to finish the whole sintering process, wherein the cooling rate is between 8.8 and 15.8 DEG C per minute. The quick cooling method for the lithium iron phosphate steel band type reducing furnace has large yield, and is convenient for process adjustment and quality control.

Description

technical field [0001] The invention relates to a lithium iron phosphate LiFePO 4 Rapid cooling method of reduction furnace. Background technique [0002] Advanced batteries continue to attract the attention of the market because of their energy-saving themes. The main reason is that the seriousness of global warming has increased the awareness of environmental protection. The conversion efficiency of secondary batteries (replacing lead-acid and nickel-metal hydride batteries with lithium-ion batteries) can reduce the use of fossil fuels, reduce carbon dioxide emissions, and slow down the rate of global warming. [0003] With the continuous improvement of advanced battery material technology, users have higher and higher requirements for the characteristics of advanced battery materials, which require high processing performance and rate performance. If ordinary powder metallurgy manufacturing processes are used, it is difficult to meet user needs. The cathode material of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/45
Inventor 戴煜羊建高谭兴龙
Owner ADVANCED FOR MATERIALS & EQUIP
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