阅读说明：本技术 一种酸性电弧炉炉衬 (Acid arc furnace lining ) 是由 洪荣州 于 2019-09-06 设计创作，主要内容包括：一种酸性电弧炉炉衬,包括如下质量份的组成成分：硅砖90-95；石英砂2-5；白泥1-3。与现有技术相比,本发明的优点是：酸性炉炉衬是以硅砖为主的酸性材料为主,酸性炉衬阻止气体透过的能力远大于碱性炉衬,硅元素在钢水中会大量的放热,因此使钢液升温快,从而吹氧工艺可以由强吹氧变成微吹氧,吹氧量是碱性炉的三份之一；且由于酸性渣电阻率较高,因此电弧较短,热效率高。在产能并相同的情况下,极大降低了成产成本。(An acid electric arc furnace lining comprises the following components in parts by mass: 90-95 parts of silica brick; 2-5 parts of quartz sand; 1-3 parts of white mud. Compared with the prior art, the invention has the advantages that: the acid furnace lining is mainly made of acid materials mainly made of silica bricks, the gas permeation prevention capability of the acid furnace lining is far higher than that of the alkaline furnace lining, and a large amount of heat is released by silicon in molten steel, so that the temperature of the molten steel is quickly increased, and the oxygen blowing process can be changed from strong oxygen blowing into micro oxygen blowing, wherein the oxygen blowing amount is one of three times of that of the alkaline furnace; and because the resistivity of the acid slag is higher, the electric arc is shorter, and the heat efficiency is high. Under the condition of the same productivity, the production cost is greatly reduced.)

1. The lining of the acid electric arc furnace is characterized by comprising the following components in parts by mass:

90-95 parts of silica brick;

2-5 parts of quartz sand;

1-3 parts of white mud.

2. An acid electric arc furnace lining as claimed in claim 1 wherein said silica bricks contain no less than 98% SiO 2.

3. An acid electric arc furnace lining as claimed in claim 1 wherein said silica sand is of a size in the range 8 to 16 mm.

4. An acid electric arc furnace lining according to claim 1 wherein said white mud has an alumina content of not less than 35% and a whiteness of not less than 75.

Technical Field

The invention relates to the technical field of steelmaking electric arc furnaces, in particular to an acid electric arc furnace lining.

Background

Electric arc furnaces utilize high temperature melting of ores and metals produced by an electrode arc. The furnace body of the electric arc steel-making furnace consists of a furnace cover, a furnace door, a steel tapping groove and a furnace body, and the bottom and the side wall of the furnace body are built by using an alkaline refractory material or an acidic refractory material to form a furnace lining. Electric arc furnaces can be classified into alkaline electric furnaces and acidic electric furnaces according to different properties of furnace linings. The lining of the alkaline electric arc furnace is built by alkaline refractory materials such as magnesia, dolomite and the like, and the alkaline electric arc furnace is adopted for steelmaking in most of the production of common steel products in the market, but the comprehensive cost of the alkaline electric arc furnace is much higher than that of the acid electric arc furnace.

Disclosure of Invention

In order to solve the problem of high use cost of the alkaline electric arc furnace, the invention adopts the acid electric arc furnace to make steel.

An acid electric arc furnace lining comprises the following components in parts by mass:

90-95 parts of silica brick;

2-5 parts of quartz sand;

1-3 parts of white mud.

Preferably, the content of SiO2 in the silica brick is not less than 98%.

preferably, the specification of the quartz sand is 8-16 mm.

Preferably, the content of aluminum oxide in the white mud is not lower than 35%, and the whiteness is not lower than 75.

Compared with the prior art, the invention has the advantages that: the acid furnace lining is mainly made of acid materials mainly made of silica bricks, the gas permeation prevention capability of the acid furnace lining is far higher than that of the alkaline furnace lining, and a large amount of heat is released by silicon in molten steel, so that the temperature of the molten steel is quickly increased, and the oxygen blowing process can be changed from strong oxygen blowing into micro oxygen blowing, wherein the oxygen blowing amount is one of three times of that of the alkaline furnace; and because the resistivity of the acid slag is higher, the electric arc is shorter, and the heat efficiency is high. Under the condition of the same productivity, the production cost is greatly reduced.

Drawings

FIG. 1 is a schematic view of an electric arc furnace configuration.

Detailed Description

as shown in fig. 1, the electric arc furnace comprises a furnace body 1 and a furnace lining 2, wherein the furnace lining 2 is built by silica bricks, quartz sand and white mud are used as binders, and the furnace lining 2 comprises the following components in parts by mass: silica brick 95; 4, quartz sand; white mud 1, wherein the content of SiO2 in the silica brick is not less than 98%, the specification of the quartz sand is 8-16mm, the content of aluminum oxide in the white mud is not less than 35%, and the whiteness is not less than 75.

The principle is as follows: the lining of the acid electric arc furnace is built by acid materials such as silica bricks, quartz sand, white mud and the like, and acid slag is made by the materials such as the quartz sand and the like, but the acid slag has no capability of removing phosphorus and sulfur, so the acid furnace steel-making uses waste steel raw materials with lower phosphorus and sulfur content.

the smelting starts from the time of feeding scrap steel into the electric arc furnace, and the acid furnace lining is mainly made of acid materials mainly comprising silica bricks. The gas permeation preventing capability of the acid furnace lining is far greater than that of the alkaline furnace lining, and silicon element can release a large amount of heat in molten steel, so that the molten steel is heated quickly, and oxygen blowing speed can be changed from strong oxygen blowing to micro oxygen blowing, and the oxygen blowing amount is one of three times of that of an alkaline furnace. And because the resistivity of the acid slag is higher, the electric arc is shorter, and the heat efficiency is high. The production capacity is not changed while the cost is reduced extremely rapidly. Finally, the recovery rate of the scrap steel can be improved by 5 percent relative to the alkaline furnace, and the recovery rate of the scrap steel is greatly improved.