Mold powder for premelted billet mold and its preparation method

Abstract

The invention discloses a pre-molten type square billet crystallizer casting powder and a preparation method thereof. The pre-molten type square billet crystallizer casting powder is composed of the raw materials, by weight percentage, 60-80% of premelting agent, 4-14% of wollastonite, 2-5% of fluorite, 3-8% of sodium carbonate, 4-8% of carbonaceous materials, 0-3% of bentonite, 2% of dextrin, 0-8% of quartz and 0-3% of lithium carbonate, wherein the premelting agent is composed of 60-70% of red mud, 6-24% of quartz, 4-12% of calcite, 2-4% of clay and 2-8% of barium sulfate. The preparation method comprises adding the raw materials into water for uniform mixing; performing ball milling; performing atomizing, drying and prilling after ball milling to obtain the pre-molten type square billet crystallizer casting powder. According to the pre-molten type square billet crystallizer casting powder and the preparation method thereof, the red mud is applied to the crystallizer casting powder and reaches an adding quantity up to 50%, so that a breakthrough on the application quantity of recycled waste red mud can be achieved; meanwhile, the square billet casting powder prepared through the premelting agent is uniform in component, stable in melting performance and relatively low in cost.

Description

technical field [0001] The invention belongs to the technical field of metallurgical auxiliary materials, in particular to a mold powder for a premelted billet mold and a preparation method thereof. Background technique [0002] my country is one of the countries with the highest dependence on energy in the world, among which coal accounts for about 75% of the total energy resources, and has an important strategic position in the national economy. Saving coal resources is of great strategic significance to ensure the stable development of the national economy. During the "Twelfth Five-Year Plan" period, my country's development is still in an important period of strategic opportunities where great achievements can be made. With the acceleration of industrialization and urbanization and the continuous upgrading of the consumption structure, my country's energy demand has shown a rigid growth. Due to the constraints of domestic resource guarantee capacity and environmental ca...

AI Technical Summary

Problems solved by technology

[0007] Disadvantages of red mud: radiation; TiO in red mud 2 If the content is large, it is easy to generate high melting point substances, thereby deteriorating the physical and chemical properties of slag, deteriorating the lubrication effect, and it is one of the reasons for the formation of "cold skin" on the liquid surface of the crystallizer; calcium oxide, silicon oxide, aluminum oxide, etc. in red mud The mass percentage of the substance is irregular, and direct application is not conducive to the preparation of excellent performance mold powder; the bulk density of red mud is 0.67g / cm 3 Too light will directly affect the physical and chemical properties of mold flux