Limestone is a sedimentary rock, mainly composed of calcium carbonate and magnesium carbonate. Its main purpose is to process sand aggregate. Stone chips and stone powder produced in the process of processing and production become limestone tailings. Limestone tailings are ground into limestone powder by limestone grinding mill. It can be used as concrete admixture and concrete prefabricated parts to maximize the utilization of stone chips. As a manufacturer of limestone grinding mill machine, HCMilling(Guilin Hongcheng) will introduce the application of limestone grinding mill machine to process limestone powder.

Limestone mineral powder refers to the powder particles with particle size less than 0.075mm (defined in hydraulic concrete with particle size less than 0.16mm) produced during the processing of construction sand aggregate. The main application ways are:

(1) Limestone ground into mineral powder as concrete admixture: The application of limestone mineral powder in the concrete industry has been studied for a long time. As the main component of tailings, how to use limestone ore powder as concrete admixture has become a hot spot and development trend in the domestic concrete industry. Limestone powder is an inert admixture. As an admixture for concrete, limestone powder has obvious advantages and feasibility: first, the addition of limestone powder can accelerate the hydration of cement; The second is that the particles of limestone ore powder have shape effect and filling effect. It can not only increase the fluidity of the mixture, improve the particle grading of the cementitious material system, but also improve the pore structure of the concrete; Third, limestone powder has active effect. In recent years, China has successively issued national and local standards, which have affirmed and standardized the utilization of limestone powder as a resource. As a concrete admixture, limestone ground into mineral powder has a broad market and good social and economic benefits in the long run.

(2) Preparation of prefabricated component admixture by grinding limestone into mineral powder: The new prefabricated component system has the advantages of fast construction speed, easy quality control, material saving, good appearance quality, good durability, reduced on-site wet operation, and environmental protection. In the field of prefabricated components, a large amount of limestone mineral powder in limestone tailings can also be used as concrete and cement admixtures. The Standard for Quality Control of Precast Concrete Components (DB11/T1312-2015) requires that when selecting mineral admixtures such as limestone mineral powder for precast concrete, its performance should meet the requirements of relevant standards. Some studies have shown that limestone powder can effectively improve the fluidity and anti-separation of concrete in the production of vibration-free and self-compacting precast concrete components, and has obvious effect on concrete molding, solving the problems of insufficient raw materials. In addition to the limestone powder mentioned above, dolomite and granite powder with similar properties to limestone can also be used as admixture of concrete and cement.

In addition to the application in the construction industry, high-grade limestone sandstone mines can be used to develop high-end products such as calcium carbonate, high-calcium powder for flux, limestone powder for desulfurization in thermal power plants. These applications are inseparable from the support of limestone grinding mill machine. As the manufacturer of limestone grinding mill machine, HCMilling(Guilin Hongcheng) produces limestone grinding mill machine equipment such as limestone Raymond mill machine, limestone vertical grinding mill machine, limestone ultra-fine grinding mill machine, etc. It provides good equipment support for the production and application of limestone powder, and can process 80-2500 mesh limestone powder. The limestone powder project has rich experience in design and numerous customer cases.

If you have any relevant requirements, please contact us to learn the equipment details of limestone grinding mill machine.