Troubleshooting of gypsum calcining equipment

There are two crystal water in the molecular formula of gypsum stone or industrial by-product gypsum, and only when one semi crystal water is removed to generate hemihydrate calcium sulfate can it have gelling property. The process of removing crystal water is gypsum calcination. The calcination of gypsum mainly includes dry method and wet method. The former is the construction gypsum mainly composed of hemihydrate gypsum, which is dehydrated under dry conditions; The latter is "boiled" under saturated steam pressure α- Semi hydrated gypsum. How to deal with the failure or problem when using gypsum calcining equipment?

In general, the gypsum calcining equipment has the following problems. Feeding problem: the surface water content is high and the material is sticky. Calcination problem: it is easy to agglomerate, agglomerate, and calcine unevenly after calcination, resulting in "over burning" or "raw burning". Quality problem: the proportion of "hemihydrate gypsum" after calcination is low, which affects the compressive strength of subsequent products.

The instability of phase composition and setting time greatly affects the quality and productivity of subsequent production. Market problem: the added value of products is low, and the utilization rate of thermal energy and electric energy is important. Working environment: the production environment and labor wages of workers require modern process equipment.

Solution to failure of gypsum calcining equipment:

(1) Three retaining rings (300 ㎜ high) are added at different positions in the drying section, which increases the filling coefficient of the materials in the drying cylinder, increasing the filling coefficient from 4% to 15%. On the premise of ensuring the load of the drying and calcining device, the total amount of materials to be dried is increased by 20m ³， The material distribution is balanced, and the heat conduction efficiency of the material is increased.

(2) Change the plate from 16 pieces per circle to 30 pieces per circle to make the material distribution on the cylinder section more uniform. The two sides of the original board are open, and no blocking board is added. The materials are reduced during lifting. Due to less lifting materials, the materials move back rapidly when the silver powder is dried, resulting in uneven lifting. For this reason, a blanking plate (at the tail side of the machine) is added at the rear end of the plate to prevent the backward movement of materials and uneven materials on the cylinder section.