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Process of producing gypsum block directly with chemical gypsum

A technology of chemical gypsum and gypsum blocks, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of high price, achieve investment economy, save investment and plant area, and be popularized and applied value effect

Inactive Publication Date: 2007-09-19
张继忠 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This production method (that is, wet production process) requires expensive centrifugal dehydrators and drying equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The invention discloses a method for directly producing gypsum blocks by using chemical gypsum. The production equipment includes: an autoclave (capable of heating and stirring), a mixer, and a gypsum block mould. The process steps are: first put 500kg of chemical gypsum --- desulfurized gypsum into the autoclave, add 300kg of water, close the autoclave door; in the process of continuously heating the autoclave, make the internal steam pressure Reach 0.3MPa and keep it for 3 hours, while the stirring blades in the kettle continuously stir the chemical gypsum; after cooking for 3 hours, open the steam pressure reducing valve of the autoclave to reduce the steam pressure in the kettle to normal pressure, and then Open the kettle door, pour the converted hemihydrate gypsum slurry into the high-speed mixer through the pipeline; quickly add 100kg of fly ash, 40kg of plaster powder, and 10kg of cement into the mixer; stir them quickly for one minute , pour the mixed material ...

Embodiment 2

[0018] A method for directly producing gypsum blocks by using chemical gypsum, the production equipment is the same as in Example 1, and the process steps are: first, 400kg of chemical gypsum-phosphogypsum is put into the autoclave, and 350kg of water is added, and the autoclave is closed Door; in the process of continuously heating the autoclave, make the internal steam pressure reach 0.3MPa, keep it for 3 hours, and at the same time, the stirring blade in the autoclave continuously stirs the chemical gypsum; after cooking for 3 hours, open the autoclave The steam pressure reducing valve of the kettle reduces the steam pressure in the kettle to normal pressure, then opens the door of the kettle, pours the converted hemihydrate gypsum slurry into the high-speed mixer through the pipeline; quickly adds 200kg of pulverized coal into the mixer Ash, 80kg of Paris plaster powder, 20kg of cement; after stirring them quickly for one minute, pour the mixed material in the mixer into th...

Embodiment 3

[0020] A kind of method adopting chemical gypsum to directly produce gypsum block, its production equipment is the same as embodiment 1, and its process step is: first the chemical gypsum of 420kg is packed in the autoclave, and add water 320kg, close the autoclave door; During the continuous heating of the autoclave, make the internal steam pressure reach 0.3MPa, keep it for 3 hours, and at the same time, the stirring blades in the autoclave continuously stir the chemical gypsum; after cooking for 3 hours, turn on the steam of the autoclave Pressure reducing valve to reduce the steam pressure in the kettle to normal pressure, then open the door of the kettle, pour the converted hemihydrate gypsum slurry into the high-speed mixer through the pipeline; quickly add 180kg of fly ash to the mixer, 60kg Plaster of Paris powder, 20kg of cement; after stirring them quickly for one minute, pour the mixed material stirred in the mixer into the block mold; after ten minutes, eject the so...

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Abstract

The process of producing gypsum block directly with chemical gypsum includes the reaction between chemical gypsum and water in steaming condition to eliminate one hemicrystalline water molecule, mixing hemicrystalline water gypsum slurry, industrial slag and water absorbent to obtain the mixture material, and molding the mixture material to form the gypsum block. Compared with available technology, the process uses no drying, dedusting and dewatering apparatus, and has low power consumption, environment friendship, less covered area and low cost.

Description

technical field [0001] The invention relates to a production method of gypsum products, in particular to a method for directly producing gypsum blocks with chemical gypsum. Background technique [0002] The current existing methods of producing gypsum blocks all adopt plaster of paris powder as the main raw material, which is poured into the mold after being stirred with water. And use chemical gypsum (such as desulfurization gypsum, phosphogypsum, etc., its chemical composition is powdery calcium sulfate dihydrate) to produce plaster powder (its chemical composition is calcium sulfate hemihydrate) is produced by the following two processes: [0003] 1. Dry the chemical gypsum first, and then dehydrate it by calcining (that is, use heat energy to remove one and a half crystal water in the chemical gypsum composition) to mature gypsum powder. During the calcination process, part of the powdery chemical gypsum will also be discharged while water vapor is discharged, forming d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B11/02C04B28/14C04B18/08B28B1/14
CPCY02W30/91
Inventor 张继忠王永昌
Owner 张继忠
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