Calcium silicate board is a kind of gray-yellow green environmentally friendly decorative board, which is made of cement, quartz sand, fiber, silicon and calcium in a mixed ratio, and is made through multiple processes such as barrel molding, high temperature, steam curing, and pressurization. The strength and fire resistance of the calcium silicate board made through these processes are good. It also has good moisture resistance and corrosion resistance.
What is Calcium silicate board machine?
Calcium silicate board machine is also called calcium silicate board equipment. It is mainly made of siliceous materials, calcium materials and other accessories as raw materials. It is a new type of building material manufactured through pulping or slurry method, pulping, molding, steaming, drying, sanding and post-processing. Calcium silicate board is divided into calcium silicate board for insulation and calcium silicate board for decoration according to the raw materials. It is widely used in decoration for various purposes such as civil and commercial use.
The calcium silicate board equipment includes a series of calcium silicate board production lines. What equipment is needed for the calcium silicate board production line? The calcium silicate board production line is configured differently according to the processing technology and annual output. Flowing slurry method calcium silicate board production line equipment: pulp processing system, pulp section, board stacking demoulding section, pressure steaming curing section, edge grinding and chamfering sanding section.
The Process of Calcium Silicate Board Making
1. Raw material preparation
Raw material preparation includes wet grinding and pulping of quartz sand, crushing and digestion of quicklime, grinding and pulping of wood fiber, etc.
2. Pulping process
Pump the wood fiber pulp that has been diluted and finely ground to meet the pulping requirements into a countercurrent mixer, add the measured slaked lime, cement, quartz powder, etc. in turn, and after being fully mixed by the countercurrent mixer, it is made into a certain concentration of flow pulp and then pumped to the pulp storage tank for standby, and then it is uniformly ground by a single-disc pulping machine and stirred in a pre-mixing tank, and then input into the flow pulp board making machine at a certain concentration and flow rate to enter the board making operation.
3. Flow pulp board making
The slurry that flows evenly from the flow pulp box is filtered and dehydrated on the running industrial blanket to form a thin layer of material wrapped around the forming cylinder. After multiple layers of winding, when the set slab thickness is reached, the control system automatically cuts the slab according to the design size of the slab. The board making machine uses a forming cylinder with a diameter of 1600mm. The slab is cut and trimmed horizontally to form two standard boards. Standard slabs are stacked by stackers, and the stacking method is 1 steel mold 1 plate.
4. Plate compaction
The molded slab is pressurized by a 7000t press for 30 minutes, so that the slab is dehydrated and compacted under a high pressure of 23.5MPa to improve the strength and density of the plate.
5. Pre-curing and demoulding
The wet slab is pre-cured in the pre-curing kiln and demoulded after the slab has gained a certain strength. The pre-curing temperature is 50-70ºC, and the pre-curing time is 4-5h.
6. Autoclave curing
After demoulding, the slab is sent to the autoclave for autoclave curing for 24h, with a vapor pressure of 1.2MPa and a temperature of 190ºC. During the steam curing process, the silicon dioxide, calcium hydroxide and water in the slab react chemically to form tobermorite crystals and xonotlite. The quality of the hydration reaction directly affects the strength, expansion rate and moisture resistance of the calcium silicate board.
7. Drying, sanding, and edge grinding
The steamed slabs are dried on the comb dryer in the tunnel kiln to make the moisture content of the slabs reach the acceptance standard of no more than 10%. The slabs can be shipped after sanding, edge grinding and quality inspection.
Sun Hong Group
We can help you to set up the factory, and design and layout the whole production process according your cost. Welcome to contact us to get more details.
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