Spray drying granulation method of boron carbide powder
A technology of boron carbide powder and boron carbide, which is applied in the field of spray drying and granulation of boron carbide powder, can solve the problems of poor performance and performance deterioration of boron carbide ceramics, achieve low cost, reduce cost, and promote large-scale application Effect
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Embodiment 1
[0024] 900 grams of boron carbide powder (D 50 : 0.8μm), 50 grams of petroleum coke, 10 grams of silicon carbide powder, 5 grams of ammonium lignosulfonate, 45 grams of dextrin, 5 grams of ethylene glycol and 1500 grams of deionized water were put into a horizontal ball mill, and 1000 grams of Boron carbide was used as a medium ball during ball milling, and the ball mill was mixed for 5 hours, and the speed of the ball mill was 500 rpm to obtain a slurry with a pH value of 8. After passing the slurry through a 300-mesh sieve, use a constant-flow pump to send the slurry to the centrifugal turntable nozzle of the spray drying granulator, and the centrifugal speed is 5000 rpm to form tiny droplets. The inlet temperature of the spray drying granulator is 250°C, and the outlet temperature is 100°C. The granulated material is cooled and collected, and passed through a 100-mesh sieve to obtain a granulated material with a moisture content of 1.1%. The moisture-proof packaging is read...
Embodiment 2
[0027] 900 grams of boron carbide powder (D 50 : 0.8μm), 40 grams of graphite powder, 20 grams of silicon carbide powder, 5 grams of ammonium lignosulfonate, 55 grams of dextrin, 6 grams of tributyl phosphate and 1500 grams of deionized water were put into the vertical ball mill, and 1000 One gram of boron carbide was used as a medium ball during ball milling, and the ball milling was mixed for 5 hours at a speed of 600 rpm to obtain a slurry with a pH value of 8. After the slurry passes through a 300-mesh sieve, a constant-flow pump is used to send the slurry to the centrifugal turntable nozzle of the spray drying granulator, and the centrifugal speed is 5000 rpm to form tiny droplets. The inlet temperature of the spray drying granulator is 260°C, and the outlet temperature is 105°C. The granulated material is collected by cooling and passed through a 100-mesh sieve to obtain a granulated material with a moisture content of 0.8%.
[0028] The bulk density of the pellets is 0...
Embodiment 3
[0030] 970 grams of boron carbide powder (D 50 : 0.8μm), 65 grams of graphite powder, 30 grams of silicon carbide powder, 10 grams of ammonium lignosulfonate, 55 grams of dextrin, 5 grams of ethylene glycol and 2000 grams of deionized water were put into the rolling ball mill, and 1000 grams of carbonized Boron is used as the medium ball during ball milling, the ball mill is mixed for 5 hours, and the ball mill speed is 400 rpm to obtain a slurry with a pH value of 10. After the slurry is passed through a 300-mesh sieve, the slurry is sent to the spray drying machine with a constant flow pump. The high-speed rotary nozzle of the granulator forms tiny mist droplets. The inlet temperature of the drying tower is 260°C, and the outlet temperature is about 102°C. The granulated material is collected by cooling and passed through a 100-mesh sieve to obtain granulated material with a moisture content of 1.0%. The moisture-proof packaging is ready for use.
[0031] The bulk density o...
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