Products Description
The effects of sintering temperature (700~900°C), sintering time (15~120 min) and heating rate (10~100°C·min-1) on the apparent density, porosity, phase composition and compressive strength of porous materials were studied by direct sintering of powder by direct sintering of silicon slag and glass powder. The results show that the uniformity of the pore structure decreases with the increase of sintering temperature. The apparent density decreases first and then increases with the increase of sintering temperature, increases with the extension of holding time, decreases with the increase of heating rate, and the change trend of porosity is opposite to that of apparent density.
Products parameters
| Type | Chemical Composition (%) | ||||
| Si | Al | S | P | C | |
| ≤ | |||||
| Silicon Slag 35-38 | 35-38 | 5 | 0.1 | 0.05 | 5 |
| Silicon Slag 38-42 | 38-42 | 5 | 0.1 | 0.05 | 5 |
| Silicon Slag 42-47 | 42-47 | 5 | 0.1 | 0.05 | 5 |
| Silicon Slag 50-55 | 50-55 | 5 | 0.1 | 0.05 | 5 |
| Silicon Slag 55-60 | 55-60 | 5 | 0.1 | 0.05 | 5 |
| Silicon Slag 60-65 | 60-65 | 5 | 0.1 | 0.05 | 5 |
| Size | 10-50mm 90% min/10-70mm 90% min /10-100mm 90% min | ||||
Products cooperation picture
1. A silicon slag treatment method in the alumina production process, which is characterized in that the treatment process is as follows: after the sodium silica slurry after the sodium aluminate solution is desiliconized by the filter solid-liquid separation and washing, the solution is sent to the alumina production process; The separated sodium silica slag was mixed with lime milk according to the molecular ratio of CaO/Na2O=3~4, and the reaction was stirred for 2~4 hours under the process conditions of 90 °C~100 °C and liquid-solid ratio of 5-7. The dealkalized slurry is separated from the solid-liquid, the dealkalized slag is passed through the ball mill for 20-30 minutes, the slag is surface treated, and the transformation reaction is carried out for 2 hours with CO2 stirring with a concentration of 8% ~ 100% at a liquid-solid ratio of 5-10 and a temperature of 50±100 °C; The transformed slurry and the solution after solid-liquid separation of dealkalized slurry were added to the lye, so that the caustic concentration reached 50~100g/L, the liquid-solid ratio was 7~10, and the aluminum was dissolved at a temperature of 50±10 °C for 1-2 hours; Finally, the dissolved aluminum slurry separated from the solid and liquid is sent to the sintering red mud scrubbing system to discard the slag phase.
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