As a popular building energy-saving material, calcium silicate is known by more and more manufacturers and bosses who are ready to invest in this new material. Therefore, it need professional calcium silicate grinding mill to process it.

Raw materials for the production of calcium silicate

1. Silicous materials: quartz powder, diatomite, fly ash, etc.

2. Calcareous materials: slaked lime powder, cement, calcium carbide mud, etc.

3. Reinforcing fiber: wood paper fiber, wollastonite, cotton fiber, etc.

4.Main ingredients and formula: silicon powder + calcium powder + natural log pulp fiber.

Quartz powder silica powder calcium powder diatomite wollastonite grinding mill

Among the mills produced by HCM, the fineness of the powder produced by the HLMX calcium silicate ultra-fine vertical roller mill to produce quartz powder, silicon powder, calcium powder, diatomite, wollastonite, etc. can be adjusted between 45um and 7um. Grading system, the highest fineness can reach 3um. It can be used for ultra-fine grinding of non-metallic mineral products with hardness 1-7 such as quartz, diatomite, cement, wollastonite and calcium carbonate used as raw materials for the production of calcium silicate. Environmentally friendly and energy-saving ultrafine powder processing equipment. This mill can be used for multiple purposes, producing a variety of raw material powders for plates, and the fineness is randomly adjusted, the powder production range is large, and a lot of cost is saved.

Calcium silicate production raw materials and technological process

Step 1: Raw Material Processing

Including wet grinding and pulping of quartz sand, crushing and digestion of quicklime, grinding and beating of wood fiber, etc.

Step 2: Pulping

The wood fiber pulp that meets the requirements of beating degree is pumped into the counter-flow mixer, and the metered slaked lime, cement, quartz powder, etc. are added in turn, fully mixed by the counter-flow mixer to make a flow slurry of a certain concentration, and then pumped to the slurry storage tank. For standby use, it will be homogenized by a single-disc refiner, stirred in a pre-mixing tank, and then fed into a flow-slurry plate-making machine at a certain concentration and flow rate to enter the plate-making operation.

Step 3: Headstocking

The slurry flowing out of the headbox evenly is filtered and dehydrated on the running industrial felt to form a thin layer and wound on the forming drum. When the set slab thickness is reached after multiple windings, the control system is designed according to the slab. The size of the knife is automatically cut off the slab.

Step 4: Plate Compaction

The formed slab is pressed 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 compactness of the plate.

Step 5: Pre-curing and demoulding

The wet slab is pre-cured in a pre-curing kiln, and the slab is demolded after obtaining a certain strength. The pre-curing temperature is 50～70℃, and the pre-curing time is 4～5h.

Step 6: Autoclave Curing

After the slab is demolded, it is sent to an autoclave for autoclave curing for 24h, the vapor pressure is 1.2MPa, and the temperature is 190℃. During the steam curing process, the silica, calcium hydroxide and water in the slab react chemically to form tobermorite crystals and tobermorite. The quality of the hydration reaction directly affects the strength, expansion rate and moisture resistance of the calcium silicate.

Step 7: Drying, Sanding, Edging

The steamed slabs are dried on the comb dryer in the tunnel kiln, so that the moisture content of the slabs reaches the acceptance standard of not more than 10%, and the slabs can be shipped after sanding, edging and quality inspection.

If your project needs to use calcium silicate grinding mill equipment, you can contact HCMilling(Guilin Hongcheng). Please inform us your raw material, required fineness(mesh/μm) and capacity (t/h). Then, HCM team will arrange professional and technical selection engineers to connect with you and provide you with a complete set of equipment selection solutions.