Limestone crusher

SHANGHAI SHIBANG MACHINERY CO., LTD is one high-tech enterprise, which involves R&D, production, sales and service as well. In the past 20 years, we devote to producing mining equipments, sand making machines and industrial grinding mills, offering expressway, rail way and water conservancy projects the solution of making high grade sand and matched equipments.

Limestone

The main components of limestone are calcium carbonate (CaCO3) and Mohs hardness 3. After the limestone is mined from the limestone, it is crushed to form limestone particles, that is, stones, sand, or further ground to form limestone powder. It is widely used in building materials, highways, metallurgy, chemical industry and other industries. Lime is divided into quicklime and slaked lime. Limestone is calcined into calcium oxide CaO (commonly known as quicklime) after calcination, which is generally lumpy and is used in water quality treatment, asphalt improvement, desulfurization, building materials, medicine and other industries. Quicklime becomes slaked lime by absorbing moisture or adding water. The main component is calcium hydroxide Ca (OH) 2, which is used in environmental protection, medicine, food and other industries.

limestone

Limestone processing technology

Limestone has different processing technologies for different uses, but these processing technologies are also closely related. From coarse crushing to fine crushing, to grinding, to ultra fine crushing, some processing processes are optional due to different uses. The processing of limestone is mainly crushing, grading and producing lime, slaked lime, precipitated calcium carbonate, ultrafine (nano) calcium carbonate, carbon dioxide, etc. Limestone generally adopts dry pulverization process. For metallurgy and road limestone, the ore can be crushed and screened. For the production of fine powder products, the ore is crushed directly by a Raymond mill after being crushed by a jaw crusher, an impact crusher or a cone crusher, and the product fineness is 100-325 mesh. The specific processing process is as follows:

  • The first stage: production of stone
  • Use crusher equipment to break large pieces of limestone. The configuration of jaw crusher + impact crusher + vibrating screen + conveyor can be used to produce coarse aggregate for construction;

  • The second stage: medium and fine crushing production sand
  • After the coarse crushed material conveyed to the counterattack is crushed by counterattack, a circular vibrating screen is used to screen the crushed and crushed materials. Larger particles are returned to the counterattack and broken again. For finer products or shaping, The crushed material is sent to a sand making machine for further crushing and shaping.

  • The third stage: grinding
  • Limestone can be used for sand making and grinding. Using YMG high-pressure mill complete set or integrated suspension roller mill can achieve efficient milling, and has a very high pass rate, and the fineness can reach 200-300 mesh. .

  • The fourth stage: production of ultrafine powder
  • The production of ultra-fine powder is mainly applied to advanced fillers, such as cosmetics. The beauty action of women around the world has promoted the hot sales of cosmetics and stimulated the development of ultrafine powders. Jianye SCM Superfine Mill can produce fillers in the nanometer range.

    Types of limestone crusher

    • Limestone Jaw Crusher
    • Limestone jaw crusher (jaw crusher for short) is mainly used for medium-sized crushing of various ores and large materials, and can crush materials with a compressive strength of not more than 320Mpa. PE series products have complete specifications, divided into two types: coarse crushing and fine crushing. The feed size is 125mm ~ 750mm, which is the recommended equipment for primary crushing. Jaw crusher (jaw crusher) is widely used in mining, metallurgy, building materials, highway, railway, water conservancy and chemical industries. Large and medium-sized jaw crushers are one of the company’s fist products. Especially in the design and production of large jaw crushers, they are already professional at home and abroad.

      Working principle: Jaw crusher crushing type is curved extrusion type. The motor drives the belt and pulley to move the moving jaw up and down through the eccentric shaft. When the moving jaw rises, the angle between the toggle plate and the moving jaw becomes larger, which promotes the movement. Hubei is approaching Ding’eban, at the same time, the material is crushed, rubbed, and crushed multiple times; when the hub is moving down, the angle between the toggle plate and the hub is reduced, and the hub is under the action of the tie rod and spring After leaving the Ding’e board, the crushed material is discharged from the lower opening of the crushing chamber at this time. With the continuous rotation of the motor, the crushing motor is periodically crushed and discharged to achieve mass production.

    • Limestone cone crusher
    • The limestone CS cone crusher uses material layered selective crushing. The crushing cavity is filled with feeding material. The material in the crushing cavity is subjected to multi-directional extrusion, shearing and kneading for crushing and self-crushing purposes, so that the walls of the crushing cavity avoid direct contact and effectively prevent the liners from abrading each other. And to avoid the material from being contaminated by metal pollutants, thereby reducing the degree of the machine’s fragile and consumable parts, effectively extending the service life of the wear-resistant parts, more than double the other similar equipment.

      The working principle of the limestone CS cone crusher: When the cone crusher works, the rotation of the motor passes the pulley or coupling, the cone crusher drive shaft and the cone crusher cone. Swing movement. Therefore, the crushing wall of the crushing cone is sometimes close to and sometimes away from the surface of the mortar wall fixed on the adjlimestone-crusherustment sleeve, so that the ore is continuously impacted, crushed and bent in the crushing cavity to achieve the crushing of the ore. The motor drives the eccentric sleeve to rotate through the bevel gear, so that the crushing cone rotates. The crushing cone is sometimes near and away from the fixed cone to complete the crushing and discharging. When the crusher falls into an unbreakable object such as a metal block, the spring at the connection between the support sleeve and the frame can generate compression deformation, discharge foreign matter, achieve insurance, and prevent machine damage.

      Limestone CS cone crusher is widely used in metallurgy, construction, road, chemical and silicate industries, and is suitable for crushing all kinds of ores and rocks with medium or higher hardness.

    • Limestone impact crusher
    • Limestone impact crusher is a new generation of impact crusher developed in combination with the specific industrial and mining conditions of the domestic sand and stone industry. Compared with the hammer crusher, the impact crusher of this series has a larger crushing ratio and can fully utilize the high-speed impact energy of the entire rotor. However, because the hammer of the impact crusher is very easy to wear, it is also limited in the application of crushing hard materials. The impact crusher is usually used for coarse crushing, medium crushing or fine crushing of limestone, coal, calcium carbide, quartz, dolomite, sulfurization. Iron ore, gypsum, and chemical raw materials such as brittle materials below medium hard.

      Limestone impact crusher features:

      1. The back plate of the rotor can withstand the extremely high moment of inertia of the rotor and the impact crushing force of the hammer head.

      2. The crusher is optimized to be designed as a low-speed, multi-crushing-chamber impact crusher. Its line speed is reduced by 20% -25% compared with ordinary counter-breakers, and high production capacity is achieved with low energy consumption.

      3. The impact crusher has three levels of crushing and shaping functions, so it has the advantages of large crushing ratio, cubic product shape, and selective crushing.

      4. Reasonable structure of the hammer, which has the advantages of fast loading and unloading, and multiple position changes, which can greatly shorten the time of changing the hammer.

      5. With new manufacturing technology, a high wear resistance and high toughness of chromium, molybdenum and vanadium alloy materials have been successfully developed, which solves the problem of crushability of hard materials. Greatly improved the service life of the hammer.

      6, special counter-tooth plate, keyless connection. There are multi-functional hydraulic stations, with hydraulic high-speed discharge clearance, stable damping of the impact plate and automatic opening of the body.

    • Limestone sand making machine
    • The working principle of the limestone sand making machine: the material enters the impact breaking from the feeding hopper, the material is divided into two parts by the distributor, and one part enters the high-speed rotating impeller from the middle of the distributor, which is rapidly accelerated in the impeller, and its acceleration can reach Hundreds of times the acceleration of gravity, and then ejected from the three uniformly distributed runners of the impeller at a speed of 60-70 meters / second, first crushed with a part of the material collected from the surrounding of the distributor, and then impacted to the vortex The material lining in the cavity is bounced by the material lining and impacts obliquely upward to the top of the vortex cavity, changes its direction of movement, deflects downward, and the material emitted from the impeller flow channel forms a continuous material curtain. Such a piece of material is subject to two or more chances of impact, friction, and grinding in the vortex crushing cavity. The crushed material is discharged from the lower discharge port. During the entire crushing process, the materials are crushed by each other by themselves, without direct contact with the metal components, but by impact, friction and crushing with the material lining, which reduces angular pollution and prolongs the mechanical wear time. At the same time, the ingenious airflow inside the vortex cavity self-circulates, eliminating dust pollution.

      Limestone sand making machine uses high-speed moving materials to collide with each other, crush itself and crush between materials. Therefore, it is suitable for iron ore, copper ore, gold and silver ore, molybdenum ore, lead zinc ore, manganese ore, glass raw materials, refractory materials, ceramics, sand corundum for construction, talc, olive branch, rock salt, fluorite, limestone and carbonization Coarse and fine crushing of ultra-hard, medium-hard and corrosion-resistant materials such as silicon steel slag

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