Method for preparing foamed ceramic by microwave sintering of cobalt smelting waste slag
A technology of microwave sintering and foaming ceramics, which is applied in the field of solid waste resource utilization, can solve the problems of high energy consumption cobalt smelting waste residue, etc., and achieve the effects of shortening the firing time, lowering the sintering temperature, and lowering the foaming temperature
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Embodiment 1
[0032] A method for preparing foamed ceramics by cobalt smelting waste slag microwave sintering, comprising the steps of:
[0033] 1. Ingredients are made according to the following weight percentages: 20% of oxygen-compressed slag left over from cobalt smelting, 70% of shale, 10% of waste glass powder, and 1% of silicon carbide powder (200 mesh);
[0034] 2. The ingredients are put into the balls and mixed evenly by wet grinding. The grinding medium is medium aluminum ceramic balls, the grinding speed is 12 rpm, and the grinding time is 15 hours; all the obtained powders pass through 200 mesh;
[0035] 3. Spray-dry powder (particle size is 20-80 mesh), put it into the mold after 24 hours of aging to make powder green body;
[0036] 4. The powder green body is directly microwave-heated to 1130°C for microwave sintering for 40 minutes, or preheated to 1050°C first, then microwave-heated to 1130°C for microwave sintering for 30 minutes, and then cooled to room temperature to for...
Embodiment 2
[0040] A method for preparing foamed ceramics by cobalt smelting waste slag microwave sintering, comprising the steps of:
[0041] 1. Ingredients are made according to the following weight percentages: 40% of non-ferrous metal ash left over from cobalt smelting, 60% of shale, 1% of sodium silicate 9 hydrate, and 0.8% of silicon carbide powder (2000 mesh);
[0042] 2. The ingredients are put into the ball and mixed evenly by dry grinding. The grinding medium is steel balls, the grinding speed is 15 rpm, and the grinding time is 4 hours; the obtained powder is less than 5% after passing through a million-hole sieve;
[0043] 3. The obtained powder is granulated by a roller press, and the particle size is 5 mesh, and it is laid into a mold to make a piled powder;
[0044] 4. The stacked powder is directly microwave-heated to 1150°C for microwave sintering for 15 minutes, or preheated to 1100°C first, then microwave-heated to 1150°C for microwave sintering for 10 minutes, and then...
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