Heat preservation covering agent

Abstract

The invention discloses a heat preservation covering agent which is processed by mixing components of, by weight, 5-8% of metal aluminum powders, 15-30% of boron nitride powders, 5-15% of sodium nitrate, 25-35% of modified expanded perlite, 15-30% of chaff ashes, 10-18% of metal magnesium powders and 5-8% of fluorite powders. The heat preservation covering agent can produce heat so that heat preservation and thermal insulation effects of the covering agent are improved, condensation speeds of metal liquids at casting risers are slowed down, and the capacity for the covering agent to absorb metal liquid included matters is enhanced.

Description

technical field [0001] The invention relates to a thermal insulation covering agent, in particular to a covering agent used in the casting field of the metal industry for thermal insulation of molten metal. Background technique [0002] In the prior art, in the casting field, the molten metal in the ladle must be kept warm before and during the casting process. The heat preservation method has been using the traditional plant ash, but the plant ash is flammable and pollutes the environment; the slag-collecting heat-preservation covering agent disclosed in the patent publication number CN1032959A, although it has the functions of heat preservation and slag collection, is easy to hang due to the high perlite content. ladle, often causing damage to the lining of the ladle. [0003] At present, acidic and neutral covering agents made of carbonized rice husk, perlite and other insulating materials are usually used in China. The insulating effect is poor. The covering agent itsel...

AI Technical Summary

Problems solved by technology

The heat preservation method has been using the traditional plant ash, but the plant ash is flammable and pollutes the environment; the slag-collecting heat-preservation covering agent disclosed in the patent publication number CN1032959A, although it has the functions of heat preservation and slag collection, is easy to hang due to the high perlite content. ladle, often causing damage to the lining of the ladle

[0003] At present, acidic and neutral covering agents made of carbonized rice husk, perlite and other insulation materials are usually used in China, and the insulation effect is poor. The covering agent itself does not have a heating function and cannot compensate for the temperature drop during the casting process.