Window blocking material used for high silicon alloy smelting electric furnace

Abstract

The invention discloses a window blocking material used for a high silicon alloy smelting electric furnace, and relates to the field of chemical materials. The window blocking material comprises, by weight percent, 10 to 30% of a solid-state inorganic binder, 40 to 60% of a carbon material and 10 to 30% of a liquid-state organic binding agent. The window blocking material can effectively avoid the pollution to the high silicon alloy, it is ensured that the redox reaction of anhydrous steam and the carbon material causes the furnace window carbon brick erosion, and in the use process, the furnace window is repaired, so that the furnace window carbon brick damage speed is effectively reduced; the maintaining period of the furnace window is prolonged to 28 to 42 days, and the furnace window repair cost is reduced; the furnace window replacing frequency is reduced, the coil base yield and the product quality are improved, and the economic benefit is improved; and the window blocking material can be used in cooperation with a high silicon alloy smelting electric furnace window opening and blocking machine, the automation level is improved, operation is easy, and labor force and time are reduced.

Description

technical field [0001] The invention relates to the field of chemical materials, in particular to a plugging material for high-silicon alloy submerged arc furnaces. Background technique [0002] High-silicon alloy submerged arc furnaces generally use ordinary carbon bricks as furnace lining and furnace eye materials. Each submerged arc furnace has two furnace holes for periodic iron tapping. The eye opening method is generally burnt by oxygen blowing or arc burnt by a burner. Carbon brick has the advantages of high melting point, good thermal shock resistance, high temperature strength, and good volume stability at high temperature due to low linear expansion coefficient, but it also shows certain shortcomings in the actual application process. According to statistics, the high-silicon alloy submerged arc furnace eye charcoal bricks are damaged quickly, the service life is short, and the maintenance frequency is high. The eye repair cycle is 2-3 weeks; In 3 years, the direc...

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Problems solved by technology

The advantage of this process is that the production cost is low, and the disadvantages are: (1) the process operation is cumbersome and takes a lot of labor and time; (2) the plugging material contains about 10% moisture, which turns into water vapor during the tapping process, At the same time, an oxidation reaction occurs with C in the carbon brick: H 2 O(g)+C(s)=CO(g)+H 2 (g)

The higher the furnace temperature is, the faster the reaction will be. In the high-temperature environment for producing high-silicon alloys, the consequences of this reaction are: the carbon bricks in the furnace eye are loose and peeled off due to the continuous reduction of carbon in them, and they are also subjected to pressure during the tapping process. The scouring of high-temperature molten iron leads to further burning loss, and accelerates wear in the round steel hole opening and brazing operations; (3) The main component of the plugging material is SiO 2 、Al 2 o 3 , C, H 2 O, SiO 2 with Al 2 o 3 Consumed in the form of slag during the opening process, C is oxidized and consumed in the high temperature and water vapor environment, limited by the material, the plugging material has no repair effect on the damage of the furnace hole

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