How to choose limestone crushing and grinding processing technology

How can we avoid the waste of limestone in the production and processing process? The choice of processing technology is important. Today to explain to you limestone crushing or grinding processing process, and how to choose the appropriate processing process, so as to obtain a full range of material utilization.

Limestone is mainly composed of calcium carbonate (CaCO3). The Mohs hardness value is 3. Lime and limestone are used in large quantities as building materials, industrial raw materials. Limestone can be directly processed into stone and burned into quicklime, quicklime CaO absorbs moisture or water to become slaked lime, the main component of slaked lime is Ca(OH)2. slaked lime is blended into lime slurry, lime paste, etc., which is used as painting materials and brick and tile adhesives.

Limestone Process Requirements

Limestone processing for different purposes for the fineness of the material requirements are also different. The limestone powder used for desulfurization agent in power plant is 200-325mm, while the limestone used for making double flying powder is about 400mm. Relatively speaking, the use of mill models and sizes are also different, then limestone have those processing techniques and uses? Let us analyze it in detail.

Limestone is used in steel mills, power plants, desulfurization agent, asphalt mixing plant, concrete mixing plant, the fineness of the finished product in the 200-325 mesh between the use of our company's Raymond mill, high pressure suspension mill and European version of the mill, can achieve the product fineness requirements. The fineness of double fly powder is about 400 mesh according to the different requirements of the output, choose different types of mills, more convenient and fast to meet the production requirements.

Limestone grinding process

After the crusher crushes the large raw material to the required feed size, the material is transported to the storage bin by the dustpan elevator. Then the material is evenly sent to the grinding chamber of the host by the electromagnetic vibrating feeder, and the shovel knife and the grinding rollers rotate with the process of shoveling up the material and feeding it into the grinding rollers between the roll rings to form a bedding layer. The materials are ground between the grinding rollers and the grinding rings, thus achieving the purpose of powder making. The powder after grinding is brought to the analyzer by the fan airflow to select the powder, and the fine powder which reaches the fineness requirement enters into the big cyclone collector through the airflow pipe to separate and collect; and then discharged by the unloader, which is the finished powder, and the airflow is sucked into the blower by the airflow pipe at the upper end of the big cyclone collector. Undesirable powder is thrown to the outer wall by the blade and airflow detachment, coarse powder due to the role of gravity into the grinding chamber for regrinding.

However, in many industries, not all limestone will be used as industrial raw materials, limestone also has the function of road repair, construction, cement, breeding, smelting, quick solvent and so on. These raw materials have different requirements for the finished product, the grinding process may not be suitable, so we have to choose another process.

Limestone crushing process

The limestone raw material is fed into the jaw crusher from the vibrating feeder of the material table for crushing, and the larger material will be crushed to the feeding size of the next process, and the crushed stone material will be conveyed by the conveyor belt to the transit silo for stacking. The crushed materials are fed into the conveyor through the feeder at the bottom of the transfer bin, and then sent to the impact crusher for fine crushing. The stone materials that meet the requirements will be screened and cleaned in the subsequent process, and the oversized stone materials will be returned to the impact crusher for re-crushing. The crushed material is sent to vibrating screen by conveyor belt for screening, and different specifications of finished stone materials are sorted out. The machine sand enters the wheeled sand washing machine for cleaning, removing dust and getting high quality mechanism sand.

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