Method of controlling temperature of energy-saving environment-friendly laterite-nickel ore smelting shaft furnace through aluminothermic process
An energy-saving and environmental-friendly technology for laterite nickel ore is applied in laterite nickel ore smelting plus on-line temperature control of aluminum particles, and in the field of laterite nickel ore energy-saving and environmentally friendly shaft furnace smelting, which can solve the problems of slow heating of smelting temperature, reduction of production efficiency, and extension of smelting time. , to save production time, improve recovery rate, and achieve good slag-making effect.
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[0045] 1. Establish a temperature curve. When the temperature of the melting zone reaches 1600°C, a thermocouple is inserted into the core to represent the center of the zone for detection. Then, the thermocouple is inserted into the zone furnace lining close to the inner surface to measure the temperature, and each zone is measured in turn to calculate the temperature gradient and the corresponding The gradient coefficient of the temperature is established, and the temperature standard curve is programmed into the monitoring expert system program.
[0046] 2. During the production process, the lining temperature is detected online, and the lining temperature is compared with the curve temperature, and the deviation ideal temperature value is automatically calculated.
[0047] 3. Calculate the amount of aluminum particles to be added according to the temperature deviation value and the heat value of aluminum.
[0048] 4. Add aluminum particles to the center of the top of the ...
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