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Customer Case:Limestone Grinding Mill2023-08-15 16:06:47

Limestone is a prevalent non-metallic mineral and a valuable resource with diverse applications. It is the commercial term for limestone as a mineral raw material. Due to its wide distribution and easy accessibility in nature, limestone has been extensively utilized throughout the history of human civilization. With a rich mining heritage, it serves as an essential construction material. In modern industry, limestone acts as the primary raw material for cement manufacturing, lime production, calcium carbide synthesis, and plays an indispensable role as a flux in metallurgical processes. High-quality limestone finds extensive usage in various manufacturing processes such as papermaking, rubber production, paint formulation, pharmaceutical manufacturing, cosmetics production, feed processing, sealing applications,and bonding procedures after undergoing ultrafine grinding. According to incomplete statistics,the overall ratio of limestone consumption compared to building stone consumption in cement production,lime production ,metallurgical flux usage,and ultra-fine calcium carbonate utilization stands at 1:3.To maximize the benefits derived from using limestone,a high-performance Limestone grinding mill that suits one's needs becomes crucial.

About Limestone

The primary constituent of limestone is calcium carbonate (CaCO3). Lime and limestone are extensively utilized as construction materials and industrial raw materials. Limestone can be directly processed into stone or calcined to produce quicklime. Quicklime, upon exposure to moisture or when mixed with water, undergoes hydration and transforms into hydrated lime, primarily composed of Ca(OH)2, also known as calcium hydroxide. Hydrated lime finds common application in the production of lime paste, stone plaster, etc., for coating materials and brick adhesives. Lime exhibits exceptional properties such as thermal conductivity, hardness, water absorption, air permeability, sound insulation, polishability, good cementation properties and machinability; hence it can be employed either in its raw form or subjected to extensive processing applications.
Limestone can also be utilized in the production of glass, soda ash, caustic soda, and other substances. It is employed in ironmaking to eliminate gangue and act as a slag-forming material alongside quicklime for the removal of detrimental impurities like sulfur and phosphorus. In everyday life, limestone is processed into refined powdered calcium carbonate which serves as fillers in rubber, plastic, paper, toothpaste, cosmetics, and various other products. In agriculture, quicklime is used for preparing lime-sulfur mixtures and Bordeaux liquid pesticides. The application of hydrated lime in soil aids in neutralizing soil acidity while enhancing its structure and providing plants with essential calcium nutrients. Lime paste can be applied on tree trunks for protective purposes. The chemical industry utilizes limestone processing to produce crucial calcium salts such as calcium chloride. Moreover,XinJiang region in China possesses abundant reserves of limestone and has recently witnessed significant economic benefits through the development of the limestone powder processing industry.

The Development prospect of Limestone

With the continuous advancement of science and technology, as well as the development of nanotechnology, the application scope of limestone is being further expanded. Limestone pulverized by a grinding mill finds extensive use in various fields, yielding considerable economic benefits. In recent years, there has been a growing interest in the limestone powder processing industry. Limestone serves not only as an indispensable raw material in cement and steel production but also finds wide applications in water ash utilization, smelting processes, cement manufacturing, chemical industries, power plant desulfurization systems, and paper production sectors. Moreover, due to its increasing market demand year after year, it can replace plastic-made pipes and packaging materials as a new type of environmentally friendly raw material. Therefore, limestone stands out as one of the most dynamic environmental protection resources and green mineral resources in the 21st century.

Customer Case

Clirik, a leading manufacturer specializing in mining machinery in China, has been established for over 20 years. Leveraging the abundance of mineral resources in China, we have developed mills tailored to various ore materials and achieved remarkable sales both domestically and internationally. Our products have received highly positive customer evaluations. Now let's delve into a customer case study featuring our limestone mill:
Customer Source: Egypt

Project capacity: 10 t/h
Processing materials: limestone, calcite
Fineness: 200-2500 mesh
Equipment configuration: 1 HGM100L ultrafine mill +1 CLG300 modifier
Use of finished materials: The wide application of high-end limestone and calcite ultrafine powder in cosmetics, pipes, paint and other fields will bring more than millions of profits every year.
In late 2013, a prominent mining company in Egypt reached out to Kolirik for assistance. During the initial phase of the project, our technical team provided an overview of pulverizing equipment in China. Simultaneously, we maintained frequent and effective daily communication, which made a profound impression on our Egyptian customers who were unfamiliar with China. In mid-2015, the Egyptian engineering team officially visited Shanghai Klirik Machinery Co., LTD. As a leading mining company in Egypt with abundant high-quality limestone and calcite resources, they had stringent requirements for ultrafine powder processing whiteness. However, neither domestic nor international test machine results or production site inspections met their satisfaction. Therefore, during this visit to China, they chose to explore Shanghai Klirek Machinery Co., LTD. Upon identifying their needs, Kollirek promptly invited them to visit our showroom and factory for on-site testing purposes. According to the test report provided by the field test machine, the produced ultrafine powder exhibited narrow particle size distribution after classification and controllable 2um content while achieving a whiteness level of 98%. The customer expressed great satisfaction with these results and swiftly signed a contract on the following day. Ten years later in 2023, the customer approached Clirik again and added an HGM100L ultrafine mill along with CLG modifier.

Introduce to Grinding Mill

HGM Ultrafine Grinding Mill
Capacity: 0.2-45 t/h
Feed Size: ≤20 mm
Powder Fineness: 325-3000 mesh
HGM Ultra fine grinding mill, also known as micro powder mill or superfine powder grinding mill, is meticulously designed by SBM's R&D department based on numerous innovations and extensive testing. It has been widely acknowledged by a multitude of customers that our ultra fine powder grinder possesses exceptional features, consistent quality, effortless operation, and maintenance convenience. This equipment serves as the perfect solution for precise milling of fine and superfine powders. HGM Ultra fine grinding mill specializes in producing refined and delicate powders from non-inflammable, non-explosive, and brittle materials with a Moh’s hardness rating below six. These materials include calcite, chalk, limestone, dolomite, kaolin clay, bentonite talc mica magnesite illite pyrophyllite vermiculite sepiolite attapulgite rectorite diatomaceous earth barium sulfate gypsum alunite graphite fluoriterock phosphate potassium ore pumice fly ash etc., encompassing over 100 different types of substances.


Working Principle of Mill
During mill operation, all mill rolls rotate within the ring, driving the material to the edge of the turntable through centrifugal force before it falls into the grinding chamber. Within this chamber, the material undergoes repeated pressing, crushing, and grinding by the roller. The high-pressure blower continuously draws air into the mill, carrying along with it the crushed material towards a classifier. Inside this classifier, a high-speed impeller filters out particles from the airflow: those with an unsatisfactory particle size are sent back to be re-ground in the mill while those with a satisfactory particle size are mixed with air and directed towards a cyclone deduster. Most of these qualified particles will exit through a bottom drain valve; however, a small amount of fine powder will adhere onto filter bag surfaces within a dust collector as it accompanies airflow. Simultaneously, due to sudden vibrations caused by instantaneous injection of high-pressure gas controlled by pulse valves, any fine powder attached to these surfaces falls off. Both batches of materials mentioned above are conveyed downwards for packaging finished powder. Additionally, filtered clean air will ultimately be discharged through an outlet on muffler.

Mill Advantages

The superfine powder grinding mill has a capacity twice that of the jet mill, mixing grinder, and ball mill with the same finished final size and motor power, while reducing energy consumption by 30%.
The ring and roller are forged with special material for enhanced utilization.Under the same grinding material and finish special size, the spare parts have a lifecycle of about one year, which is 2-3 times longer than that of an impact mill or turbo mill. Moreover, when grinding calcite carbonate, the lifetime can reach 2-5 years. The lifecycle of spare parts varies depending on the hardness of the material being processed.
There are no issues caused by bolts shedding or rapid wear of bearings and seal components since there are no rolling bearings or screws in the grinding cavity.
The final fineness of the ground materials can be adjusted between 150 meshes and 3000 mesh (74-5 micron).
By applying pulse bag filters and mufflers, dust pollution and noise are greatly alleviated. Ensuring even material feeding into the machine and adjusting the main speed to suit ground materials result in stable fineness levels to increase capacity and efficiency while reducing power consumption.


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