Production process and production equipment of high-stability fused cast zirconia-corundum brick

Abstract

The invention discloses a production process and production equipment for a high-stability fused cast zirconia-corundum brick. The preparation method comprises the following steps: preparing a mixture, melting, casting, and carrying out heat preservation annealing, and demolding, wherein the ingredients comprise the following components in parts by weight: 35-40 parts of ZrO2+HfO2, 2-14 parts of SiO2, 1.2-1.6 parts of Na2O, 0-3 parts of rare earth and the balance of Al2O3, and the total weight parts of the ingredients are 100 parts; the ingredients comprise clinker and raw materials in the same proportion, the clinker is a block, the particle size of the clinker is 3-8cm, and the raw materials are powder with the particle size of 0.05-1.5 mm; the clinker accounts for 10-30%; in the meltingprocess, 1 / 2-3 / 5 of molten materials are reserved in a furnace body, and the clinker is directly poured into the center of the furnace body through a hopper; the raw materials are subjected to microwave heating before entering the furnace body; the lowest point of the raw materials entering the furnace body should be above the highest liquid level in the furnace body, and the distance between thelowest point and the highest liquid level is 1 / 2-3 / 4 of the distance between the highest liquid level and the reserved liquid level; and the included angle [alpha] between the direction of the raw materials entering the furnace body and the horizontal liquid level is 30-60 degrees. According to the production process and production equipment, the melting efficiency can be effectively improved, the uniformity of feed liquid components is improved, and the energy consumption is reduced.

Description

technical field [0001] The invention relates to a production process of fused-cast zirconium corundum bricks and production equipment used in the production process. Background technique [0002] At present, the production of cast refractories is mainly based on the three-phase electric arc furnace oxidation process. In industrial production, quartz sand is often used as casting material. The specific process is as follows: [0003] Mixture preparation: Mix alumina powder, zirconia, sodium oxide, zircon sand and other raw materials in a certain proportion, mix well and evenly for use. [0004] Melting process: Add the uniformly mixed raw materials into the automatically controlled three-phase electric arc furnace and melt them under the best conditions. Use a three-phase electric arc furnace to oxidize and melt the batch material. The melt temperature is moderate. The melting process can be automatically controlled by a programmable computer program to make the material li...

AI Technical Summary

Problems solved by technology

[0008] Among them, the melting process usually takes about 120 minutes, and the power consumption is high. At the same time, due to the different components, especially the key components of refractory, zirconia and other components have different densities, and there are different components in the material liquid under long-term melting. Variation in layer height content

Images