Method for manufacturing regenerative gypsum powder by waste gypsum models
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The invention relates to a method for manufacturing regenerative gypsum powder by waste gypsum models, which belongs to the technical field of gypsum materials. The invention is used for solving the problem of regenerative utilization of the waste gypsum models, and is characterized in that the method is carried out according to the following steps: a. picking selection; b. crushing; c. soaking; d. steam pressing by a still kettle; e. baking; f. crushing and screening; and g. ageing. The invention has the main advantages that: 1. the method is simple, the operability is high, the invention is suitable for large production condition operation, does not need special equipment, and is easy to be popularized and applied; 2. the waste gypsum models treated according to the method of the invention can be in cyclic use for many times; 3. the performance of the regenerative gypsum powder produced by the method of the invention is similar to the performance of the new gypsum powder in use, and some indexes are superior to those of the new gypsum powder; and 4. the regenerative gypsum powder of the invention can be used for manufacturing large slip casting gypsum models without the addition of additives. The method of the invention has great positive effect in the aspects such as resource protection, pollution reduction, technical progress promotion, enterprise cost reduction and the like through the cyclic utilization.