Limestone is primarily composed of calcium carbonate (CaCO3), a compound that is common on Earth and can be found in rocks. Limestone and lime are extensively used as building materials and are also important raw materials in many industries. Limestone can be directly processed into stone and calcined to produce quicklime. Lime is categorized into quicklime and hydrated lime. The main component of quicklime is CaO, which generally appears in block form and is white when pure, but can be light gray or light yellow when it contains impurities. Quicklime absorbs moisture or is added with water to become hydrated lime, whose main component is Ca(OH)2. Hydrated lime can be mixed to form lime slurry or lime paste.
Large pieces of limestone are crushed by a crusher to a feed size (15mm-50mm) that can enter the grinding mill.
The crushed small pieces of limestone are sent to the storage bin by an elevator, then uniformly and quantitatively sent to the grinding chamber by a feeding device for grinding. For fine powder processing, LM vertical mill, MTW European version mill is generally used; for ultrafine powder processing, LUM ultrafine vertical mill or SCM ultrafine mill is generally used, and for coarse powder processing, straight-through centrifugal mill is used.
The ground material is classified by a classifier, and the unqualified powder is returned to the main machine for regrinding after classification by the classifier.
The powder that meets the fineness requirements is separated and collected in a dust collector through pipelines. The collected finished powder is sent to the finished product silo by a discharge device and then uniformly packed using a powder tanker or automatic packing machine.
MTW European Grinding Mill is innovatively designed through deep research on grinding mills and development experience. It absorbs the latest European powder grinding technology and concept, and combines the suggestions of 9158 customers on grinding mills. This grinding mill perfectly satisfies the production demands of the customers on 200-33μm (80-425Mesh) fine powder.
Based on the absorption of advanced technologies of famous international corporations and 30 years’ experience in grinding mill production, SBM has launched the LM Vertical Grinding Mill which integrates five functions of crushing, grinding, powder selection, drying and material conveying. It is characterized by centralized technological process, small occupational area, low investment, high efficiency, energy conservation and environment protection.
LUM Ultrafine Vertical Grinding Mill is independently designed by SBM on the basis of years of experience in grinding mill production. LUM grinding mill adopts the latest Taiwan grinding roller technology and German powder separating technology. The ultrafine vertical grinding mill integrating ultrafine powder grinding, grading and transporting has become a better choice in the ultrafine powder grinding industry.
SCM Ultrafine Grinding Mill is a new superfine powder (325-2500 mesh) production equipment developed through accumulating years of experience in grinding mill production, absorbing Swedish advanced machine manufacturing technology, and undergoing many years of tests and improvements. The SCM Ultrafine Grinding Mill is the result of combination of advanced Chinese and Swedish technologies. Meanwhile, it symbolizes the new development and new science in the grinding world.
