Pretreatment mixing stirrer, gypsum slurry manufacturing device, construction surface material manufacturing device, pretreatment calcined gypsum manufacturing method, gypsum slurry manufacturing method, construction surface material manufacturing method

Abstract

Provided is a pretreatment mixing stirrer which is disposed at a front stage of a slurry formation mixing stirrer for making gypsum slurry by kneading calcined gypsum and water and performs pretreatment by mixing the calcined gypsum with one or more additives selected from liquid and powder, the pretreatment mixing stirrer having: a cylindrical housing which has an upper plate, a lower plate disposed to face the upper plate, and side plates arranged between the upper plate and the lower plate, and has a mixing stirring region where the calcined gypsum and the additives are mixed and stirred in the inside thereof surrounded by the upper plate, the lower plate, and the side plates; a rotational plate which is disposed inside the housing and has a disc shape; a rotational driving shaft which penetrates the upper plate and the lower plate of the housing and is connected to the rotational plate; a calcined gypsum supply port which is disposed in the upper plate and supplies the calcined gypsum to the mixing stirring region; and an additive supply port which is disposed on one or both of the upper plate and the side plates and supplies the additives to the mixing and stirring region.

Description

technical field [0001] The present invention relates to a mixer for pretreatment, a manufacturing device for gypsum slurry, a manufacturing device for building face materials, a method for manufacturing pretreated plaster of paris, a method for manufacturing gypsum slurry, and a method for manufacturing face materials for building. Background technique [0002] The gypsum slurry which is a raw material of gypsum board etc. is prepared, for example by mixing plaster of paris, water, and optionally various additives. [0003] However, when water is added to plaster to prepare a gypsum slurry, the plaster is miniaturized and a large amount of fine particles may be generated. In this way, if the plaster of paris produces a large amount of particles and its surface area increases, the amount of water contained in the plaster of paris becomes large, and a large amount of water is required to dry gypsum products such as gypsum boards manufactured using the gypsum slurry to remove t...

AI Technical Summary

Problems solved by technology

In this way, if the plaster of paris produces a large amount of particles and its surface area increases, the amount of water contained in the plaster of paris becomes large, and a large amount of water is required to dry gypsum products such as gypsum boards manufactured using the gypsum slurry to remove the remaining moisture. time and energy concerns

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