A high-stability fusion-cast zirconium corundum brick production process

Abstract

A high-stability fused-cast zirconium corundum brick production process, including mixture preparation, melting process, casting process, thermal insulation annealing process, demoulding processing process, and the ingredients are calculated by weight ZrO 2 +HfO 2 35‑40 parts, SiO 2 12‑14 parts, Na 2 O 1.2-1.6 parts, rare earth 0-3 parts, Al 2 o 3 Make up the batching to 100 parts by weight as the balance; include clinker and raw meal in the batching, the proportion of the two is the same, the clinker is a block, the particle size is 3-8cm, and the raw meal is a powder with a particle size of 0.05-1.5mm ;The proportion of clinker is 10‑30%; the melting process: keep 1 / 2‑3 / 5 of the molten material in the furnace body, and the clinker is directly poured into the center of the furnace body through the hopper; the raw material is microwaved before entering the furnace body Heating; the lowest point where the raw material enters the furnace body should be above the highest liquid level in the furnace body, and the distance between the lowest point and the highest liquid level is 1 / 2‑3 / 4 of the distance between the highest liquid level and the reserved liquid level; The angle α between the direction of the raw material entering the furnace body and the horizontal liquid level is 30-60 degrees. The process and equipment can effectively improve the melting efficiency, improve the uniformity of the material liquid components, and reduce energy consumption.

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...

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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

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