Products Description
Raw material ratio of black silicon carbide powder: The raw material ratio of black silicon carbide mainly includes quartz sand, petroleum coke or coal coke, wood chips, etcThe production process of black silicon carbide involves multiple steps, first of all, the raw materials such as quartz sand, petroleum coke, and silica are mixed according to a certain proportion, and then added to the resistance furnace for high-temperature smelting. The finished product after smelting is a silicon carbide block. Subsequently, due to the high hardness of silicon carbide, it is necessary to use a jaw crusher for coarse crushing, then a cone crusher for fine crushing, followed by particle size screening, and finally grinding to obtain silicon carbide sand or silicon carbide powder of different particle sizes.
Products parameters
| Grit | Sic | F.C. | Fe2O3 |
| F12-F90 | ≥98.50 | <0.20 | ≤0.60 |
| F100-F150 | ≥98.00 | <0.30 | ≤0.80 |
| F180-F220 | ≥97.00 | <0.30 | ≤1.20 |
| F230-F400 | ≥96.00 | <0.40 | ≤1.20 |
| F500-F800 | ≥95.00 | <0.40 | ≤1.20 |
| F1000-F1200 | ≥93.00 | <0.50 | ≤1.20 |
| P12-F90 | ≥98.50 | <0.20 | ≤0.60 |
| P100-P150 | ≥98.00 | <0.30 | ≤0.80 |
| P180-P220 | ≥97.00 | <0.30 | ≤1.20 |
| P230-P500 | ≥96.00 | <0.40 | ≤1.20 |
| P600-P1500 | ≥95.00 | <0.40 | ≤1.20 |
| P2000-P2500 | ≥93.00 | <0.50 | ≤1.20 |
Products cooperation pictures
1.In terms of raw material ratio, the raw materials used in the traditional black silicon carbide powder production include quartz sand, coke, salt (sodium chloride), wood chips, etc., which react with the carbon in the quartz sand to form black silicon carbide at a high temperature of 2200~2500 °C. The reaction formula is: SiO2+3C→SiC+2COtext{SiO}_2 + 3C rightarrow text{SiC} + 2text{CO}SiO2+3C→SiC+2CO. After the generated silicon carbide crystals are baked, they must go through hand selection, crushing, magnetic separation, screening and other processes to finally obtain pure silicon carbide. In addition, there is a new method for producing black silicon carbide, which uses the waste heat from the furnace wall when the graphitization furnace produces the graphite electrode. In this method, when graphitizing furnace is used to produce graphite electrodes, the temperature of the electrode charging chamber in the furnace is 2500~2700 °C, and there is a temperature gradient field of 2500 °C~room temperature along the thickness of the furnace wall, in which the range of 2500~2200 °C is the environment where silicon carbide is generated and crystallized. When silica and carbon are placed in this environment in a certain proportion, black silicon carbide is generated. The raw materials used in this method are basically the same as those used in the traditional preparation of this product, which requires coke, quartz sand, salt, wood chips, etc., and the graphitization furnace for the production of graphite electrodes is the main equipment.
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