Silicon Metal is energy-intensive products, energy conservation is very important, the main energy-saving way:
(1) the material carefully.Carbonaceous reducing agent and silica has enormous influence on the choice of power consumption and production.Quality and power consumption are sometimes contradictory, to weigh the gain and loss, such as multi-purpose or full with petroleum coke, quality improvement, but power consumption will rise significantly;Multi-purpose bituminous coal or charcoal, power consumption is reduced, but the quality is affected.Adopt the method of refining Silicon Metal outside the furnace under the condition of ensure the quality of part of bituminous coal collocation of high resistivity reducing agent, can reduce power consumption.The choice of high quality silica is also very important, not only the chemical composition of silica, also look at refining performance, such as thermal stability, reducing index etc.
(2) the designed electric furnace parameters.Improper furnace parameter selection, such as high voltage power consumption rising.Design must consider production of Silicon Metal furnace size is to use graphite electrode, should not be based on a graphite electrode diameter calculation basis, and should be according to the size of carbon electrode diameter calculation of furnace.According to the experience of a certain factory, 1800 kv?A three-phase electric secondary voltage 84 v choice, choose round 1150 mm as well.
(3) using the large capacity electric furnace production.From the point of domestic statistics, 5000 kv?More than A electric power consumption is in commonly 12000 ~ 14000 kv?A/t range.Small furnace due to heat loss accounts for the proportion of large power consumption is higher, is in commonly 14000 ~ 17000 kv?A/t range.Hannah, mining companies in the United States will be 9000 kv?A furnace capacity is 12000 kv?A nissan progress 12%, Silicon Metal recovery progress 8%, A 5% drop in consumption of A good effect.
(4) using a rotary furnace, furnace lining production.Norway in 1977 company research success two rotary furnace, can prevent burden crust to make its automatic sink.A 9000 kv?A furnace test results of power consumption by 10% - 14%.
(5) the mass charge.Silica and reductant briquette made of heavy oil or gas heating furnace for the reduction in electric furnace, product unit power consumption in 9000 kw?H below.
(6) adopted semi-closed furnace heat recovery of flue gas.
(7) by refining outside the furnace Silicon Metal technology progress of product quality, to finish the rest of the small particles of metal Silicon Metal oven use remelting, achieve the goal of progress production to reduce power consumption.
(8) careful manipulation.Including the correct weighing ingredients, grasp with carbon, timely charging is not empty to burn, deep and Wei dao furnace, electrode inserted into, have a good furnace condition, achieve high quality, low consumption, high yield.
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