Preparation method for composite heat-insulating covering agent

Abstract

A preparation method for a composite heat-insulating covering agent comprises the following steps of: adding 5-15g of water in 30-50g of pearlite ore; adding the mixed solution into stirring equipment for preliminarily stirring; after uniformly stirring, respectively feeding 20-40g of waste ash from a biomass power plant, 0-10g of waste rice husk, 5-15g of flue dust of a pulverized coal thermal power plant and 0-10g of blue sand; mixing and stirring the mixture to form the plasticity of a roll ball; uniformly adding the mixture into a rotary drying kiln; after drying and rolling the mixture to form spherical particles, enabling the spherical particles to pass through a sieve with the aperture being 6mm; and after drying a finished product and cooling the finished product to normal temperature, obtaining the composite heat-insulating covering agent. The composite heat-insulating covering agent has a self-heating performance, so that the loss of heat energy is reduced and further the heat-insulating effect of the covering agent is improved; the retarding of the condensing speed of metal liquid is facilitated and the capability of the covering agent on absorbing metal liquid sundries is enhanced; the composite heat-insulating covering agent has excellent flexibility and can be conveniently, quickly, automatically and uniformly spread on the metal liquid level; and in addition, the composite heat-insulating covering agent has better slag trapping performance.

Description

technical field [0001] The invention belongs to the field of clean production, and relates to a covering agent used for metal smelting heat preservation, in particular to a preparation method of a composite heat preservation covering agent. Background technique [0002] In the prior art, most of the thermal insulation covering agents for molten metal in ladles before casting in the foundry industry are in the form of powders. Powdery covering agents tend to generate dust droplets and float when used, which greatly affects the environment. In addition, although some products can The above-mentioned partial problems are solved, but metal materials with higher prices are used, which greatly increases the production cost, wastes raw materials, is not environmentally friendly, and pollutes the environment. [0003] The invention makes full use of industrial waste, mainly waste ash from biological power plants, improves waste treatment capacity, reduces the production cost of cove...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, most of the thermal insulation covering agents for molten metal in ladles before casting in the foundry industry are in the form of powders. Powdery covering agents tend to generate dust droplets and float when used, which greatly affects the environment. In addition, although some products can Solve some of the above problems, but use expensive metal materials, which greatly increases production costs, wastes raw materials, is not environmentally friendly, and pollutes the environment