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Device and method for measuring content of magnetic foreign matters in aluminum oxide

A measuring device, alumina technology, applied in the direction of using material absorption and weighing, etc., can solve the problems of poor adsorption efficiency, safety hazards, expensive equipment, etc., to achieve the effect of promoting full contact, improving adsorption effect, and eliminating adsorption blind spots

Pending Publication Date: 2020-06-26
方复(上海)新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing problems include (1) the strength of the magnetic rod is not enough, the adsorption efficiency is poor, and it cannot completely and effectively adsorb small particles of weak magnetic substances; (2) it is dissolved in a strong acidic solvent such as aqua regia, which is a safety hazard; (3) the use of inductively coupled plasma The volume emission spectrometer is used to test the element content, the cycle is long, the equipment is expensive, not all enterprises are qualified, and it cannot meet the timeliness of the inspection needs of the enterprise's incoming material production process; (4) The sampling volume is too small and the representativeness is insufficient

Method used

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  • Device and method for measuring content of magnetic foreign matters in aluminum oxide

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0042] (1) Slurry: When the ball valves of the equipment are closed, place 5kg of pure water in a 10L conical barrel 110, turn on the electric stirring device 120, add 5Kg of aluminum oxide for lithium battery diaphragm during the stirring process, and stir for 10 minutes.

[0043] (2) Enrichment of magnetic substances: After the slurrying equipment is stirred for 10 minutes, the ball valve 130, the material pump 140, the ball valve 150, and the ball valve 160 are opened, and the slurry circulates between the slurrying equipment 100 and the magnetic substance adsorption equipment 200. After 30min, close material pump 140 and ball valve 130, ball valve 150, ball valve 160.

[0044] (3) Pure water washing: pure water is placed in a conical bucket 310 with a volume of 10 L, and the ball valve 320, ball valve 340, water pump 330, and ball valve 430 are opened in turn, and then the pure water in the conical bucket 310 passes through the water pump 330, the magnetic substance The ad...

specific Embodiment approach 2

[0047] (1) Slurrying: With each ball valve of the equipment closed, place 5kg of pure water in a 10L conical barrel 110, turn on the electric stirring device 120, add 5Kg of ordinary alumina during the stirring process, and stir for 10 minutes.

[0048] (2) Enrichment of magnetic substances: After the slurrying equipment is stirred for 10 minutes, the ball valve 130, the material pump 140, the ball valve 150, and the ball valve 160 are opened, and the slurry circulates between the slurrying equipment 100 and the magnetic substance adsorption equipment 200. After 30min, close material pump 140 and ball valve 130, ball valve 150, ball valve 160.

[0049] (3) Pure water washing: pure water is placed in a conical bucket 310 with a volume of 10 L, and the ball valve 320, ball valve 340, water pump 330, and ball valve 430 are opened in turn, and then the pure water in the conical bucket 310 passes through the water pump 330, the magnetic substance The adsorption device 200 enters th...

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Abstract

The invention discloses a device and method for measuring the content of magnetic foreign matters in aluminum oxide. The device comprises powder slurrying equipment, a magnetic substance adsorption device, a pure water storage tank and a washing water recovery storage tank. The powder slurrying equipment comprises a conical barrel and a stirring device and is used for stirring and homogenizing a taken sample. The magnetic substance adsorption equipment comprises a cylinder, a magnetic rod is arranged in the cylinder, and a heat shrink tube is arranged on the surface of the magnetic rod and used for adsorbing magnetic substances. And the pure water storage tank and the washing water recovery storage tank are used for cleaning the heat shrink tube on the surface of the magnetic rod. According to the invention, the designs that the pulpified aluminum oxide slurry is fed from low to high in the magnetic substance adsorption device and the distance between the outer wall of the magnetic rodand the inner wall of the barrel is designed are adopted, so that the sufficient contact between the slurry and the magnetic rod is promoted, the existence of adsorption blind areas is avoided, and the adsorption effect of the magnetic rod is improved. A large number of samples can be measured at a time, the sampling amount is large, and the accuracy of the measurement result is improved.

Description

technical field [0001] The invention relates to a measuring device and a measuring method for the content of magnetic foreign matter, in particular to a measuring device and a measuring method for the content of alumina magnetic foreign matter. Background technique [0002] As an inorganic substance, high-temperature calcined alumina has high thermal stability and chemical inertness, and has been applied in the ceramic coating of large-capacity lithium battery separators. And large-capacity lithium-ion batteries have been widely used as the main power source in pure batteries and hybrid vehicles, and will be used in artificial satellites, aerospace and energy storage. [0003] Lithium battery separator, together with electrolyte, positive electrode material and negative electrode material, is an important part of lithium ion battery. Most of the currently used battery separators are polypropylene (PP) and polyethylene (PE) microporous membranes. The thermal shrinkage of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/02
CPCG01N5/02
Inventor 赵月昌李冉胡蝶闫凌刘玲郭玲田雨
Owner 方复(上海)新材料科技有限公司
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