The Main Reducing Agent Used In Chemical Silicon Smelting

There are Petroleum coke, bituminous coal and charcoal. In order to increase the resistivity and chemical activity of the furnace charge, there are also combinations of gas coal coke, silica coke, blue carbon, semi coke, low-temperature coke, and wood blocks. In the chemical composition of carbon reducing agents, fixed carbon, ash, volatile matter, and moisture should be mainly considered. Generally, fixed carbon is required to be high, and the total amount of reducing agent required is reduced, resulting in less impurities brought in by ash, a corresponding reduction in slag amount, a decrease in electrical energy consumption, and a decrease in impurity content in chemical silicon. The resistivity of carbon reducing agents should be high and the porosity should be high. The resistivity of the furnace charge mainly depends on the carbon reducing agent. Carbon reducing agents have high electrical resistivity, good chemical activity, and high silicon recovery rate.
Petroleum koks has the lolow ash content among the reducing agenti used in the production of metal silicon, with ash content of 0}.17-0.6 percent , fixed carbon of 90-95 percent , and volatile content of no more than 3.5 percent -13} percent . Chemical silicon smelting uses Petroleum coke as reducing agent because of its low ash content, which is conducive to poboljšanje proizvod kvaliteta. Međutim, due to the low electric otpor, Poor Reactivity, Easy Graphitization AT High Temperature, And High Consumption of Petroleum Coca-Cola, The FurnaCE Condition Is Not Easy To Control, Resulting In Sintering Of Furnace Charge, Serious Ignition, High Power Consumption, And Difficulty In Pražnjenje.
Wood charcoal has high specific resistance and reactivity, and has low impurity content, making it an ideal reducing agent for smelting silicon used in industrial chemistry. Međutim, the properties of wood charcoal proizvedeno by different wood and methods are also very different. The ash content of oguljen charcoal is usually half to one-third lower than of of charcoal with bark, Bark has A Significant Impact on The Ash Content of ugljen. The main component of charcoal is carbon, with a low ash content, obično less than 10 percent . High resistivity and good chemical activity. Years of production practice have proven that charcoal is is an important carbonaceous raw material to meet the needs of silicon smelting in chemistry, the the source of charcoal is limited and charcoal reducira agents cannot be used anymore.

The characteristics of bituminous coal are high resistance, strong reaction ability, and low ash bituminous coal obtained through washing. The ash content can reach about 3 percent , the Fe2O3 content can reach 0.2-0.3 percent , and the Al2O3 content is less than 1 percent . The ash content of reducing agent bituminous coal in China is mostly above 3 percent , while the ash content of reducing agent bituminous coal in foreign countries is mostly around 1 percent . The chemical method used by the Soviet Union to select bituminous coal can produce clean coal with an iron oxide content below 0.1 percent . The function of wooden blocks is to increase the resistance of the material layer, and the amount used has an impact on the furnace condition. Excessive use of wooden blocks leads to loose material layers, deteriorating furnace conditions, and increased power consumption. Due to the low ignition point and carbon content of wooden blocks, their actual use as reducing agents is minimal.
The nečistoće in ugljik sirovo materijali are uglavnom pepeo, all komponirano oksidi. In kemijska proizvodnja, the oksidi in the ash also need to be reduced, which potrošnje oboje Electric Energy And carbon. Štoviše, the reducirane nečistoće Still Mix Into The Silicon liquid, Reducing The Strength of The Silicon. In production practice, for every 1 percent increase in OL Burden