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High temperature technology with different vacuum atmosphere and effect of pyrolysis

Author: admin time: 2019-02-25 source: unknown
Abstract: the malpractice of hard water washing: when using laundry detergent containing high calcium and magnesium ions, 30% of the soap liquid is consumed by calcium and magnesium ions in hard water. The calcium and magnesium soap produced after the combination is a viscous substance which is insoluble in water.

 

Pyrolysis is a method called high temperature device. It refers to the reduction of metal oxides by silicon and aluminum to obtain low carbon or trace carbon ferroalloy. The process of vacuum atmosphere furnace is also here, no matter which process will reflect the influence of high temperature.


The furnace used to realize the reduction process is called reduction furnace. The furnace used to realize the pyrolysis process is called refining furnace, and the structure of the two furnace is different. The reduction furnace is used for melting ferrosilicon and high carbon ferromanganese, silicon manganese, silicon calcium alloy and so on. The structure of the furnace and auxiliary equipment is a huge electric heating device. Continuous production of reduction furnace, regular discharge of slag and alloy, furnace pool is usually used for masonry of large carbon bricks, furnace is cylindrical or conical.

  According to the existence or absence of the furnace lid, the furnace can be divided into closed and open type, and the exhaust hood is arranged above the open furnace mouth. The closed cover is made of refractory concrete and water-cooled metal structure. After the furnace is closed, the working conditions are good, the productivity is high, the furnace gas can be recovered, but it is not easy to operate and maintain. According to the structure of the furnace, the furnace can be divided into rotary type and fixed type, and rotary furnace bottom. The unit has a rotary device with a speed of 70~80h per revolution. However, if the cover is not rotated, sand seals or water seals are used between the furnace body and the furnace cover. The slow rotation of the furnace can avoid charging at the upper part of the high temperature zone, so that the furnace gas is discharged smoothly, the reaction zone is expanded, and the furnace temperature is uniform. The bottom of the fixed furnace is made of asbestos board, refractory material, clay brick and carbon brick.

     Vacuum atmosphere furnace Refining furnace is used to produce low carbon and micro carbon ferroalloy and manganese metal, and the furnace is recycled. Its structure is similar to the steelmaking electric arc furnace, the refining furnace has two versions: fixed and tilted. Most of the fixed furnaces have no furnace cover. Their products usually contain more than 0.5% of the carbon. Most inclined furnaces have furnace lid. The carbon content of the products is usually less than 0.5%. The reduction furnace usually adopts the self baking electric pole, and the refining furnace uses the self baking electrode with carbon electrode or graphite electrode.

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