Rock and crushed stone products will be initially taken away from the deposit by drilling and blasting, after which carried for further processing application. Techniques employed for rock extraction vary because of the property and location of the deposit.
The rock and stone processing mainly include crushing, grinding, screening, size classification, material handling and storage process. The screens separate large boulders from smaller rocks which don’t need primary crushing, therefore decreasing the load to the primary crusher.

As a leading company of mining equipment manufacturing, Zenith is specializing in the design and manufacture of crushing equipment, grinding equipment, sand making equipment and beneficiation equipment. The machines designed by our company are of high quality and competitive price. The mobile crusher for sale is widely used in many countries and were well received by the mine owners and quarry operators. Our mobile crusher for sale aims at satisfying the ever increasing crushing demand. It is designed based on the conception of fully adapting various crushing condition, eliminating obstacles caused by location, environment, consequently providing simple, efficient, low-cost crushing equipment.

Dawn’s portable crushing plant is a newly designed rock crushing & screening plant, which is flexible, convenient and strong mobility, can save a large construction capital and relocation. Raw materials can be reduced at the mine site without being transported again, and also can be moved with the promotional exploitation of the raw material, which saves a large number of transportation costs. zenith company specializes in producing crusher, screen, transportation, and other rock breaking and minerals processing equipment. On the basis of the licensed technology, we optimize and introduce newly two large and three small series crushing and screening equipment.

Construction waste is the muck, waste metal, crushed stone, waste mortar, bricks and tiles and other wastes generated during the construction, laying or dismantling, and repairing of various buildings, structures, pipe networks, roads, etc.

Bentonite is a water-containing clay ore mainly composed of montmorillonite. The main indicators of its raw ore quality are generally montmorillonite content, blue absorption and colloidal price.

Bentonite production process
1. Crushing
The Mohs hardness of bentonite is 1 to 2. It is a soft non-metallic mineral and can be initially crushed.
2. Drying
Natural or heated drying can be used to remove moisture (water content ≤ 12%-6%). In order to prevent the performance of bentonite from changing due to structural changes of montmorillonite, the drying temperature should be lower than 250 ℃, and the time should not be too long.
3. Grinding
In order to meet the requirements of high fineness of bentonite in industries such as paper, plastic and rubber products. Bentonite grinding equipment usually can choose European version mill, super-pressure trapezoid mill and vertical mill for grinding.
4. Packaging
The finished materials are packaged and sent to the market.

When optimizing the stone production line, many customers want to choose a new type of crushing equipment – mobile crusher. Well, How to choose mobile crusher equipment? Let talk about it.

Preparatory stage before grinding
Pre-preparation stage before calcite grinding generally includes two steps. For the preparation of calcite, the calcite first needs to be washed with water to remove impurities, dried and sent to the raw material warehouse; the second is the pre-crushing stage, which is generally divided into one-stage crushing and two-stage crushing according to the needs of users and different subsequent processes. , First use the jaw crusher for rough crushing, and then if the particle size is too large to meet the maximum feeding particle size of the subsequent grinding equipment, secondary crushing is required. In the secondary crushing, a cone crusher or a counterattack type is generally used. The crusher performs fine crushing of the calcite, so that the crushed materials are sent to the raw material storage by the bucket elevator for use.

1. Thin Oil Lubricating Grinding Roller

Grinding roller of MB5X mill adopts thin oil lubrication. It is a technology initiated domestically which is maintenance-free and easy to operate. Thin oil lubrication is oil bath lubrication, more convenient than grease lubrication since no frequent oil-adding, and it needs lower maintenance cost.

2. No Shovel Blade Cylinder

There is no shovel blade cylinder in the grinding chamber, so ventilation area is larger and air-conveying resistance is smaller. Besides, use of large-diameter grinding roller improves the grinding efficiency directly.

3. Volute Elastic Damping Structure

Volute elastic damping structure can effectively reduce vibrating damage on the host. Between the volute and engine base, special elastic structure is applied, and in combination with setup of rubber shock pad, it could directly avoid influence of vibration of engine base on operating stability of powder concentrator, and completely eradicate the problem of shatter crack of volute and central engine due to vibration of engine base.

4. Automatic Oil-temperature Detecting Device

The host reducer is equipped with oil-temperature detecting system and heating unit, and according to the pre-set requirements, it could operate automatically under low temperature, ensuring the safe operation of host lubricating system.

5. Mesh-type Grinding Roller Hanger

Grinding roller hanger applies unusual mesh design to increase the ventilation area of the grinding chamber. This design could directly improve material-conveying efficiency while lowering the windage.

6. New Cage-type Powder Concentrator

Powder concentrator adopts low-resistance hanging cage-type powder concentrator. The advantages of this powder concentrator lies in its high efficiency and low energy consumption. Processing same kind of materials and requiring same fineness, this powder concentrator needs less electricity but it can bring higher capacity compared to the blade-type powder concentrator.

7. Integral Wear-resistant Shovel Plate

Integrated wear-resistant shovel plate could improve the durability and lower use cost of quick-wear parts. Air-intake volute is redesigned by applying wear-resistant liner, which can directly improve service life of the volute in multiples.

8. Humanized Transmission System

Transmission system of powder concentrator applies concentrated lubricating system. The system could operate automatically according to setup without shutdown and manual operation.