Waste sagger tundish coating material and use method thereof

Abstract

The invention provides a waste sagger tundish coating material and a use method thereof. The waste sagger tundish coating material comprises a waste sagger material and a plasticizing material. The purpose of preparing the tundish coating from the waste saggar is achieved, and the effect and purpose of full-value, high-value and harmless utilization of the waste saggar are achieved; the low-melting-point substance in the waste saggar has the effects of high sintering speed and short baking time, the phases in the waste saggar material mainly comprise homogeneous multi-time sintered MgO particles and magnesium aluminate spinel (or mullite and Al2O3 particles), and the magnesium aluminate spinel is superior to traditional forsterite in thermal shock resistance and mechanical shock resistance. The thermal shock resistance and the mechanical shock resistance of mullite are superior to those of traditional high aluminum or corundum. The service life of the coating material is slightly longer than that of a traditional coating material made of similar materials. The method disclosed by the invention has economic, environment-friendly and social positive significance in reducing the cost, saving resources, reducing the occupation of waste saggar stockpiling land and facilities or reducing other environment-friendly negative effects and the like.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of waste resources, in particular to a waste saggar tundish smear and a use method. Background technique [0002] At present, the waste saggars in the firing process for preparing lithium battery electrode materials such as lithium iron phosphate are mainly mullite-bonded high-alumina materials, magnesium-aluminum-spinel-bonded magnesia materials, and magnesium-aluminum-spinel-bonded saggers. The content of MgO in the bowl is as high as 65% or more, and MgO and Al 2 O 3 Magnesium saggar material whose sum of content is higher than 90%, mullite combined with Al in high alumina 2 O 3 The content is as high as 75% or more, but the saggars discarded by the firing of these lithium-ion battery electrode materials contain soluble salts (phosphorus, lithium) and heavy metal ions such as cobalt. There are problems of large investment in facilities and high maintenance costs. If we can...

AI Technical Summary

Problems solved by technology

[0002] At present, in the discarded saggers during the firing process of producing lithium battery electrode materials such as lithium iron phosphate, there are mainly mullite-bonded high-alumina materials, magnesium-aluminum spinel-bonded magnesia materials, and magnesium-aluminum spinel-bonded caskets. The content of MgO in the bowl is as high as 65%, and MgO and Al 2 o 3 Magnesia saggar materials with a total content higher than 90%, mullite combined with Al in high alumina 2 o 3 The content is as high as 75% or more, but these lithium-ion battery electrode materials are fired and discarded. Because they contain soluble salts (phosphorus, lithium) and heavy metal ions such as cobalt, there are water and soil pollution problems in landfill storage and open-air stacking. Shed memory There are problems of large investment in facilities and high maintenance costs. If we can invent a tundish alkaline smear that can use the full value, high value, and harmless of this abandoned sagger, it will help save the tundish alkaline smear The consumption of forsterite, the reduction of waste saggers storage land, or the occupation of facilities, and the reduction of other negative effects on environmental protection have positive economic, environmental, and social significance.