How to judge the quality standard of silicon metal
For consumers, when buying silicon metal, they hope to buy qualified quality, and as silicon metal manufacturers, only to ensure the quality of silicon metal, in order to win the attention of more users, get good development. Therefore, whether consumers, or manufacturers, are very concerned about the quality of silicon metal. So what is the standard for judging the quality of silicon metal? This problem will be explained simply by the coke powder manufacturer.
1. Sulfur in silicon metal: Sulfur is one of the harmful impurities in pig iron smelting, which reduces the quality of pig iron. In steel-making pig iron sulfur content is more than 0.07% for the waste. 11% of the sulfur brought into the furnace by the blast furnace charge comes from ore. 3.5% comes from limestone; 82.5% comes from silicon metal, so silicon metal is the main source of sulfur in the charge. The sulfur content of silicon metal directly affects the ironmaking production of blast furnace. When the sulfur content of silicon metal is greater than 1.6%, the amount of silicon metal increases by 1.8%, the amount of limestone increases by 3.7%, and the amount of ore increases by 0.3%. The blast furnace output decreases by 1.5-2.0%. Metallurgical coke sulfur content is not more than 1%, large and medium-sized blast furnace used metallurgical coke sulfur content is less than 0.4-0.7%.
2, the phosphorus in silicon metal points: iron metallurgical coke phosphorus content should be below 0.02-0.03%.
3, the ash content of silicon metal: the influence of the ash content of silicon metal on blast furnace smelting is very significant. When silica ash content increases by 1%, silica dosage increases by 2-2.5%. Therefore, it is very necessary to reduce silica ash content.
4, the volatile content of silicon metal: according to the volatile content of silicon metal can judge the maturity of silicon metal. If the volatile content is greater than 1.5%, it means coke; Volatile is less than 0.5-0.7%, that is over, generally mature metallurgical coke volatilization is about 1%.
5, the moisture in silicon metal: the moisture fluctuation will make the silicon metal measurement is not accurate, thus causing the furnace condition fluctuation. In addition, the increase of silicon moisture will make M40 higher and M10 lower, which will bring errors to the drum index.
6, silicon metal screen grouped into: in the blast furnace smelting silicon metal particle size is also very important. China in the past on the size of silicon metal requirements for: for large coke oven (1300-2000 square meters) silicon metal particle size is greater than 40 mm; The particle size of medium and small high silicon metal is greater than 25 mm. The particle size of silicon metal is 40-25 mm. More than 80 mm of silicon metal to the whole grain, so that its granularity range change is not big. In this way, the metal silicon lumpiness is uniform, the gap is large, the resistance is small, and the furnace condition runs well.
These are the standards to measure the quality of silicon metal. I hope you can quickly and accurately distinguish whether the quality of silicon metal is qualified or not through these, so as to protect their own rights and interests. If you still do not know which production of silicon metal should be purchased, welcome to contact our company, our company will according to your needs, to provide you with qualified silicon metal. In addition, if you are interested in silicon metal, want to know more relevant information, or what do not understand, you can contact our company, coke powder manufacturers for your detailed answers.
