A plugging material for high-silicon alloy submerged arc furnace

Abstract

The invention discloses a hole-blocking material for a high-silicon alloy submerged arc furnace, and relates to the field of chemical materials. The plugging material comprises, by weight ratio: 10%-30% of solid inorganic binder, 40%-60% of carbonaceous material and 10%-30% of liquid organic binder. The plugging material effectively avoids the pollution of high-silicon alloys, ensures that there is no erosion of the furnace carbon bricks caused by the oxidation-reduction reaction between water vapor and carbonaceous materials, and plays a role in repairing the furnace holes during use, thus effectively It slows down the damage speed of furnace eye charcoal bricks, prolongs the maintenance period of furnace eye to 28-42 days, and reduces the cost of furnace eye repair; because the number of times of replacing the furnace eye is reduced, the furnace output and product quality are improved, and the economy is improved benefit. The plugging material can be used in conjunction with the plugging machine for high-silicon alloy submerged arc furnace, which improves the automation level, makes the operation easier, and reduces labor and time.

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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