What is the comprehensive utilization of granite powder?

The comprehensive utilization of granite powder is mainly concentrated in industrial raw materials, imitation stone coatings, building ceramics, concrete, etc. Stone powder mainly comes from the dry product of saw mud produced during the sawing process, fine particles produced by natural weathering of accumulated stone scraps, and sediments in the cooling water of saws and grinders. Among them, saw mud is the main source of stone powder. At present, stone powder is generally accumulated or landfilled, and some are mixed with domestic waste or discharged directly into rivers, which has caused environmental pollution, ecological damage, and even caused social conflicts.

Comprehensive Utilization of Granite Powder

(1) Secondary industrial raw materials

Italian researchers used gravity separation and flotation processes to remove biotite contained in stone powder, and magnetic separation process to separate mechanical iron and strong magnetic minerals in stone powder to obtain quartz-feldspar concentrate from granite waste for use in the ceramics and glass industries.

(2) Imitation stone coating

Both Russia and Italy have developed decorative coatings using stone powder and resin as the main raw materials. The appearance has a good natural stone texture, and is waterproof and acid and alkali resistant, but has higher requirements for the purity of the stone powder.

(3)Architectural ceramics

Reports on the application of stone powder in the field of architectural ceramics were first reported in the early 21st century. Scholars from the University of Aveiro in Portugal conducted experiments and studied the use of waste mud generated during the production of granite slabs to replace feldspar to produce ceramic tiles. Subsequently, the feasibility of using stone powder to produce roof tiles was studied. Through the study of the impact of the amount of stone powder added on the final performance of the tiles, it was proved that when the amount of stone powder added is less than 10%, it is feasible to use stone powder as an ingredient for the production of tiles.

(4)Concrete

Compared with the research on the application of stone powder in the field of architectural ceramics, the research on its application in the field of concrete started relatively late, and research reports were common after 2010. Indian scholars have studied the effects of partially replacing river sand with stone powder as concrete fine aggregate on the rheology, mechanical properties and durability of concrete. Egyptian scholars have studied the feasibility of granite stone powder and marble stone powder as mineral additives in self-compacting concrete (SCC). Research shows that as a mineral additive, the amount of stone powder added to concrete can reach 50%. The type and performance of waste powder have a great impact on its performance in concrete. The performance of granite powder self-compacting concrete is better than that of marble powder self-compacting. Concrete warrior.