A kind of preparation method of special low-density grinding ball for cement mill
A low-density, grinding ball technology, which is applied in the field of preparation of low-density grinding balls for cement mills, can solve the problems of consumption, excessive evaporation heat, and high price, and achieve excellent performance, easy operation, and low price.
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Embodiment 1
[0030] 1.1 Weigh 250 kilograms of bauxite, 80 kilograms of alumina powder, 3 kilograms of chromium oxide, zirconia, calcium oxide, magnesium oxide, and 1 kilogram of iron oxide to make raw materials;
[0031] 1.2 Add 3 kg of aluminum sol and 3 kg of silica sol to the slurry configured in Example 1.1 after grinding for 5 hours, and add aluminum chloride, magnesium chloride, zirconium chloride, calcium chloride, and barium chloride after grinding for 5 hours. 0.2 kg, add 1 kg of sodium hydroxide after grinding for 3 hours, and finally grind for 3 hours;
[0032] 1.3 The slurry obtained in Example 1.2 is spray-dried, then machine-pressed, at 35Mpa / m 2 The pressure was maintained for 2 minutes, and the diameter of the green body was 20mm;
[0033] 1.4 Dry the sample obtained in Example 1.3 and put it into a temperature-programmed furnace for calcination. In the first stage, the temperature is raised from room temperature to 800°C at a heating rate of 8°C / min, and in the second st...
Embodiment 2
[0035] 1.1 Weigh 80 kg of bauxite, 250 kg of alumina powder, 1 kg each of zirconia, calcium oxide, and magnesium oxide to make raw materials;
[0036] 1.2 Add 1 kg of aluminum sol and 1 kg of silica sol to the slurry configured in Example 1.1 after grinding for 4 hours, add aluminum chloride, magnesium chloride, zirconium chloride, each 0.3 kg after grinding for 5 hours, and grind for 2 hours Add 1 kilogram of sodium hydroxide precipitating agent later, carry out grinding for 3 hours again at last;
[0037] 1.3 The slurry obtained in Example 1.2 is spray-dried, then machine-pressed, and the machine-pressed abrasive is 80Mpa / m 2 The pressure was maintained for 3.0 minutes, and the green body diameter was 50mm;
[0038] 1.4 After drying the sample obtained in Example 1.3, put it into a programmable temperature-controlled furnace for segmental calcination. In the first stage, the temperature is raised from room temperature to 900°C at a heating rate of 8°C / min. In the second sta...
Embodiment 3
[0040] 1.1 Weigh 115 kilograms of bauxite, 115 kilograms of alumina powder, 2 kilograms of chromium oxide, zirconia, calcium oxide, magnesium oxide, and 1 kilogram of iron oxide to make raw materials;
[0041] 1.2 After grinding the slurry prepared in Example 1.1 for 5 hours, add 2 kg of aluminum sol and 2 kg of silica sol, and then add aluminum chloride, magnesium chloride, zirconium chloride, calcium chloride, and barium chloride after grinding for 4 hours. 0.13 kg, add 1.5 kg of calcium hydroxide after grinding for 3 hours, and finally grind for 3 hours;
[0042] 1.3 Spray-dry the slurry obtained in Example 1.2, and then press it into shape with a machine-pressed abrasive tool of 70Mpa / m 2 The pressure was held for 2.5 minutes, and the green body diameter was 40mm;
[0043] 1.4 After drying the sample obtained in Example 1.3, put it into a programmable temperature-controlled furnace for segmental calcination. In the first stage, the temperature is raised from room temperat...
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