Concrete is a kind of fine grinding materials, when added to water then becomes a substance that can bind other materials such as sand, rock etc. together firmly. This substance can become hard both in the air and water. The concrete is one of the most popular building materials and engineering materials during inorganic nonmetallic materials, and is popular used in construction , water conservancy, roads, petroleum, chemical engineering and military engineering etc.
Concrete is termite-resistant, non-combustible, and can last up to fifty years if the mixture and timing is compatible. This can be very helpful when building a sturdy, stationary, platform or foundation on any residential or commercial property.
The concrete is an essential materials in building works and other structures for wide application, stable performance and the fine structure and properties of the finished products, and There could be no other material can be completely replace it in the future.

1. Raw Material Preparation.
Mining of limestone (or sand, shale, clay, and iron ore) requires the use of drilling and blasting techniques. The blasting techniques use the latest technology to insure vibration, dust, and noise emissions are kept at a minimum. Blasting produces materials in a wide range of sizes from approximately 1.5 meters in diameter to small particles less than a few millimeters in diameter. Material is loaded at the blasting face into trucks for transportation to the crushing plant.
In the technics of concrete production process, People usually choose limestones and clays as the main raw materials, crushing, concocting, grinding them into concrete raw material, feeding them into concrete kiln. After being calcined maturity, adding appropriate amount of gypsum (sometimes mixing the mixed material or admixture) then being grinded, and the concretes form.
In the phase, the needed equipment are primary crusher and secondary crusher, such as jaw crusher, cone crusher, impact crusher, mobile crusher, and screens, which both supplied by our company, the limestone is reduced to a size less than 100 mm and stored until required.. Here the recommended machines are jaw crusher, impact crusher, cone crusher. Sometimes the construction wastes are used as the raw materials, and then a mobile crusher is also a wise choice.
The pre-homogenization process makes the materials storage and homogenization.

2. Raw Grinding (wet process and dry process).
In the concrete production process, every production of 1 ton of Portland concrete grinding at least needs 3 tons of materials (including raw materials, fuel, clinker, mixed materials, gypsum). According to statistics, the grinding process in thedry-process concrete production lines operating cost 60% power, in which grinding raw materials accounted for more than 30%, grinding coal accounted for about 3%, and about 40% of concrete grinding. Therefore, a reasonable choice of grinding equipment and processes and to optimize the process parameters, the correct operation, the control of operating system, is of is of great significance to ensure product quality and reduce energy consumption.
The available grinder mills include raymond mill and other roller mill. But usually the processing capacity of the Raymond mill can’t meet the big demand of the clients. We know the amount of the rollers determines the processing capacity of grinder mills, and at present the most rollers of a Raymond mill are 4 so its capacity can be at most 4 ton per hour. So a new roller mill with 6 rollers has been the popular one and achieves high repute from the users, which is named Super Pressure Trapezium Mill. It is the real king of roller mills and its capacity can be up to 20 tons per hour base on limestones materials. Also, another new one is called High Pressure Suspension mill, whose capacity can be about 10 tons per hour.

3. Pyroprocessing.
Preheating the raw material and some decomposition are completed by the preheater, instead of some functions of rotary kiln to shorten the length back to the kiln.
Raw material completes the preheating and pre-decomposition in the cyclone preheater. The next process is carried out the rotary kiln and calcined to concrete clinkers.

4. Finish Grinding and Distribution
concrete grinding is the final process in concrete manufacturing, which cost the most electric power. Its main function is to grind concrete clinkers into condign sizes (in fineness, specific surface area etc.) and make them form a certain particle size levels to meet the coagulation, hardening requirements. High Pressure Suspension grinder millis the main equipment in concrete grinding. YGM series High Pressure Suspension grinder mill are with high grinding efficiency and with good operation stability.To some extent, they reduce the power consumption or increase the system output. Also in the process technics, compared with the closed-circuit grinding, opened-circuit grinding process is only more saving invest, and more facilitated in the maintenance and management. However, the adjustment of closed-circuit grinding is much more convenient and more adaptable to the quality changes and moisture of raw materials. Because the grindability of the clinkers from different clinkers suppliers are very different. To this point the capacity and final fineness of the closed-circuit grinder mill production are not changed much even if raw materials are from different places. Therefore, it has more advantages than opened-circuit grinding. Some experts on recommending opened-circuit grinding believe that the particle size distributions in the open-circuit concrete grinding process are wider, thus the consistency standards demand less water. So the opened-circuit grinding is welcomed in concrete mixing station. To choose which one, the concrete factory should be based on the actual situation of their choice. But YGM series High Pressure Suspension grinder mill apply to both.

The black, nodular clinker is stored on site in silos or clinker domes until needed for concrete production. Clinker, gypsum, and other process additions are ground together in grinder mill, such as ball mills, vertical mills, to form the final concrete products. Fineness of the final products, amount of gypsum added, and the amount of process additions added are all varied to develop a desired performance in each of the final concrete products.