A preparation process of composite heating plate for mold casting

Abstract

Provided is a preparation process of a composite heating plate for die casting. A heat preservation plate is arranged below the heating plate, the heat preservation plate and the heating plate are equal in length and width, and the height dimension of the heating plate is larger than that of the heat preservation plate. Round angles A are arranged at the four corners of the heat preservation plate, a plurality of columns of heat preservation holes are formed in the length direction of the heat preservation plate at equal intervals, and each column of heat preservation plates are formed in the width direction of the heat preservation plate. Round angles B are arranged at the four corners of the heating plate, and the round angles B and the round angles A are equal in diameter. The preparation process comprises the following operation steps of heating plate raw material mixing and stirring, heat preservation plate raw material mixing and stirring, heating plate forming, baking of two layers of composite plates, cooling and packaging. The structure is reasonable, firing, expansion and heating can be delayed, heat preservation performance is good, and the combustion starting time of the composite heating plate in the later die casting period is effectively shortened; and pollution of combustion products to molten steel is avoided, feeding of later solidification of the head of a steel ingot is improved, and application and popularization have good economic and social benefits.

Description

Technical field [0001] The invention belongs to the technical field of refractory materials, and particularly relates to a preparation process of a composite heating plate for die casting. Background technique [0002] When the first phase of 85.9 of Baosteel's steelmaking plant die casting production line was put into operation, the die casting was extended by putting heating agent (metal aluminum powder as heating material, auxiliary oxidizer, flux, igniting agent, etc.) into the ingot mold in the later stage of casting The head solidification time improves the shrinkage of the steel ingot head, but the heating agent is put into the steel ingot cap to produce a lot of dust and smoke, which will affect the physical and mental health of the workers on site. The HRV92-1 type heating plate is used in the cap mouth. After the product is used by the die-casting steel ingot nozzle of the steel casting branch, the heating plate is extremely good for the quality of the produced ingots, ...

AI Technical Summary

Problems solved by technology

[0002] When the 85.9 first phase of the die-casting production line of Baosteel Co., Ltd.’s steelmaking plant was put into operation, the die-casting pouring process was prolonged by adding a heating agent (using metal aluminum powder as a heating material, adding oxidizer, flux, ignition agent, etc.) into the ingot mold at the later stage of casting. The solidification time of the head can improve the shrinkage cavity of the head of the ingot, but the heating agent is put into the cap of the ingot to generate a lot of dust and smoke, which affects the physical and mental health of the workers on site. Later, in 1991, a kind of ingot that can be used in mold casting was developed. The HRV92-1 heating plate is used in the cap mouth. After the product is used in the die-casting steel ingot upper nozzle of the steel casting branch factory, the heating plate is very good for the quality of the produced steel ingot, and it has a reliable effect on the environment, environmental protection and safety. , which has been used until now

However, as the quality requirements of steel ingots produced by die casting are getting higher and higher, it is found through actual investigations that since the heating plate is placed in the cap of the ingot in advance, after the casting of steel starts, the molten steel enters the ingot mold and is placed on the cap of the ingot mold As the liquid level of the molten steel in the mold rises, there will be adverse factors such as premature ignition, combustion, expansion, and heat generation, which will affect the normal use of the heating plate, and the premature combustion products of the heating plate will fall into the ingot mold, polluting the quality of molten steel , and due to the early combustion and heat release, when the molten steel rises to the cap mouth and really needs to heat up, the calorific value will be insufficient, thus affecting the cap mouth feeding

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