Coal gangue is solid waste discharged in the process of coal mining and ore washing. At present, coal gangue is mainly used to produce coal gangue cement, concrete lightweight aggregate, refractory bricks and other building materials. In addition, it can also be used to recover coal, produce chemical products such as crystalline aluminum chloride and water glass, extract precious metals and rare metals, and can also be used as fertilizer. In order to realize these applications, it is necessary to crush large pieces of coal gangue with a coal gangue crusher. Coal gangue crusher is a special crusher for crushing coal gangue, which is derived from hammer crusher, also known as coal gangue secondary crusher or secondary crusher.

Utilization of pulverized coal gangue

1, used for road construction.

The pulverized coal gangue is a good road building material with good resistance to wind and rain erosion. It used to be 30 tons to 50 yuan, so the price can be doubled to 70 tons to 80 yuan.

2, using coal gangue to make bricks

It can also be used as a brick-making material, with coal gangue as the main raw material, accounting for more than 80% or all of the bricks. In the early stage, it is only necessary to crush the coal gangue to a particle size of 5- 10mm, and burn 10,000 standard bricks for more than 3,000 yuan, of which the profit is above 65%.

3. Production of lightweight aggregate

It is a new building material, such as building long-span bridges and high-rise buildings.

These are just a few uses of pulverized coal gangue. In addition, coal gangue can also be used to make portland cement, cement mixture, cement production, chemical additives and so on.

Coal gangue crusher structure

From the internal structure of coal gangue crusher, this equipment is also called: two-stage bottomless screen crusher, which is equivalent to a reasonable combination of two hammer crushers. The upper and lower rotors are used in series to play a continuous crushing role, and a screenless device is adopted to ensure that materials will not block the discharge port. The single-stage and single-rotor structure of the traditional crusher is improved, and the screen bottom grate bar is set at the discharge port, which solves the problem of high invalid repeated crushing rate and basically avoids the blocking phenomenon. Working principle of coal gangue crusher

The high-speed motor drives the big pulley and the eccentric shaft to make the two groups of rotors distributed in series up and down convey at high speed. The material crushed by the upper rotor hammer first falls, and then is crushed again by the lower rotor hammer rotating at high speed. At the same time, the substances in the cavity collide with each other violently and break each other. After twice crushing, the materials are finer and more uniform, and the materials that meet the requirements of particle fineness are directly discharged.

Performance advantages of coal gangue crusher

1, adopting two-stage crushing with double rotors, with high crushing efficiency and large output;

2. The design of bottomless screen is especially suitable for materials with high water content and can be used as usual in rainy days. Before drying, the materials to be dried are crushed, which can greatly improve the high drying rate;

3. Special two-way clearance adjustment technology. For controlling the size of material particles, it is only necessary to adjust the gap between the upper and lower hammers of the crusher, and at most one pair of hammers can be used.

4. Start the casing manually by hydraulic pressure, and only one person is needed to easily open and close the casing;

5. The high wear-resistant hammer head and hammer handle made of hard metal are durable;

6. Smooth startup operation, low noise, increased moment of inertia, overcoming motion resistance and saving electricity by 20%;

7. Centralized lubrication system, equipped with centralized oil distribution pump and multi-channel oil supply.