Roll crusher installation, operation and maintenance

Roll crusher installation and empty run test

1. Installation of the roll crusher

The roll crusher should not be stacked for a long time in an unventilated place where it is easy to rust. The roll crusher can be installed on a concrete foundation or on the floor of a building. In order to better withstand the uneven force generated by the machine at work, wooden strips are placed under the bottom frame so that the whole machine fits the strips, and when it comes to the steel plate weld, the strips are shoveled lower in this position so that the strips can also fit the steel plate weld.

For the installation position of the roll crusher, please refer to the layout drawing. The square holes are reserved on the foundation for installing the ground bolts and secondary pouring mortar.

2. Empty run test of roll crusher

(1) Check the relative position between the parts, which should be in accordance with the drawing requirements.
(2) The roll crusher should be tested in empty loading for 4h after assembly.
(3) The rotating parts such as V-belt pulley, gears and rollers should be smooth and no vibration during operation, and the tooth surface of the toothed rollers should not touch the body.
(4) bearing temperature rise shall not exceed 30℃, and the maximum temperature shall not exceed 70℃.
(5) After passing the no-load test run, carry out the test run with load, and the test run time can be carried out according to the system requirements.
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Roll crusher working principle & structure

1. Overview

Roll crusher is an old crushing machine. The main advantages of the roll crusher are: simple structure, compact and light body, low price, reliable work, easy to adjust, less over-crushing phenomenon, can crush sticky wet materials. Because of the above advantages of the roll crusher, there are still some industrial sectors using it, and there are new improvements and developments.

The disadvantages of roll crusher are: low production capacity, requirement for feeding the material evenly and continuously to the full length of the roll, otherwise the roll wears unevenly, and the size of the product is not uniform, which may need frequent repair. For smooth roll crusher, the size of the fed material is much smaller than the diameter of the rolls, so it cannot crush large pieces of material, and it is not suitable for crushing hard materials, either. It is usually for medium and fine crushing of medium-hard or soft materials. Although the toothed roll crusher can clamp into larger materials, it is limited to medium crushing, and the compressive strength of the material cannot exceed 60.8MPa, otherwise the tooth prongs will break easily.

According to the number of rolls, roll crushers can be divided into four types: single-roll, double-roll, three-roll and four-roll; according to the shape of the roll surface, they can be divided into three types: smooth, grooved and toothed roll crushers. The specification of the roll crusher is expressed by the diameter of the roll ø x the length of the roll L.
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Grate discharge ball mill

Assembly drawing of Grate discharge ball mill

The structure of various specifications of ball mill is basically the same, the following is an example of 2700x3600mm grate ball mill produced by Henan Deya Machinery Co., Ltd.

The following figure shows the assembly drawing of 2700x3600mm grate ball mill produced by Henan Deya Machinery Co., Ltd.


2700x3600mm grate ball mill
1.Drum 2. Flange 4. Screw 5. Manhole 7. Quill shaft end cover 8. Combination drum-scoop feeder 9. End cover liner 10. Bearing inner sleeve 11 Dust Cover 12 Quill shaft end cover 13 Grate liners 16 Central liners 17 Bearing inner sleeve 18 Ring gear 19 Pinion 20 Transmission shaft 21 Coupling Joint
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Magnetic drum separator

Wet magnetic drum separator structure and magnetic field characteristics

The structure of this magnetic drum separator is shown in Figure 1. It is composed of three main parts: Magnetic drum 1, magnetic system 2 and bottom tank 3.

The magnetic drum is made of rolled and welded stainless steel plate with thickness of 2 to 3 mm. The end cover of the magnetic drum is a cast aluminum piece, connected to the drum with stainless steel screws. The reason why use stainless steel (or copper) or aluminum for the drum is because these materials are non-conductive materials, with good permeability, so that the magnetic lines of force and the drum does not form a magnetic short circuit. The surface of the magnetic drum is also covered with a layer of wear-resistant rubber so that the drum surface is not worn. At the same time, it is conducive to the adhesion of magnetic particles on the drum surface, which strengthens the carrying effect of the drum on the magnetic particles, and the drum rotation is driven by the motor.
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