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. Through a series of crushers, such as jaw crusher, cone crusher, impact crusher, mobile crusher, and screens, the limestone is reduced to the size less than 100 mm and stored until required.

2. Raw Grinding (wet process and dry process).

3. Processing.

4. Finish Grinding and Distribution

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 grinding 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.

Portland concrete production line crush and grind limestone, shells, and chalk or marl combined with shale, clay, slate or blast furnace slag, silica sand, and iron ore to make concretes.

Grinding. During concrete product, owes most of the raw materials must first be crushed before being used to make concrete. Among these products, which include limestone, clay, iron ore and coal, limestone, etc. are most useful for making concrete. With relatively larger particles and higher hardness, crushing limestone fineness required after mining is relatively important consequence among the crush all these ingredients. There crusher used to crush many of these products, such as crushers, jaw crusher, cone crusher, vertical shaft impact crusher, etc. According to the particles of raw materials "and different hardness, which is more crushers appropriate that can be used in the crash.