The mineral sizer uses special wear-resistant toothed rollers to rotate at high speed to split and crush materials (traditional toothed roller crushers use low-speed extrusion crushing), forming a high production rate mechanism. The toothed roller crusher produced by our factory is composed of a transmission device, frame, crushing roller, mechanical spring device, and linkage mechanism, etc. It has the advantages of low noise, simple structure, and convenient maintenance. It has high production rate, uniform particle size of crushed materials, low over-crushing rate, convenient maintenance, sensitive overload protection, and safety and reliability. Nowadays, the technical development directions of the toothed roller crusher are as follows: 1. Durable and wear-resistant toothed rollers: The tooth shape of the tooth plate no longer follows the traditional design. The tooth shape is large but the particle size can be well guaranteed, with an extremely long service life. The service life of the coarse tooth plate is 1.5-2 years, and that of the fine tooth plate is not less than 10 months. The shape of the teeth is no longer the traditional fan-shaped teeth. Due to the shape and the requirements of the coal particle size, the teeth cannot be made too large, and the fine teeth cannot exceed 15mm. Due to the limitations of domestic wear-resistant materials, the actual wear time will not exceed 3 months. With the same material, the service life of our tooth plates is increased by 3 to 4 times.

2. Large crushing ratio for various materials and industry applications: Our mineral sizer can expand the feed size range to 1.5-2m, and the output particle size can be controlled at about 300mm in one pass. This kind of crushing equipment with a large crushing ratio is not available in other crushers such as jaw crushers, gyratory crushers, cone crushers, hammer crushers, and impact crushers. 3. Novel crushing working principle ensures product quality: The crushing principle of the mineral sizer adopts the form of tensile shearing to crush materials, which is conducive to ensuring uniform particle size of the materials and avoiding excessive powder generation. At the same time, its spiral toothed roller layout can effectively prevent material blockage, making it particularly suitable for crushing sticky and wet materials.

4. Optional spare parts improve product economic benefits: A crushing beam is installed at the bottom between the two toothed rollers, which can greatly improve the crushing efficiency and ensure a better product particle size. The crushing beam can be adjusted according to the required material size and can also be quickly disassembled through bolts to ensure maintenance efficiency and reduce downtime, thereby ensuring product economic benefits.

5. High output for large-scale mining industries: Our company's developed double-toothed roller crusher has a maximum output of 7000t/h. When various screens are used for coal drying, they can all screen normally. When the particle size is required to be less than 15mm and the moisture content is between 5% and 15%, frequent clogging and sticking phenomena will occur. This is also the reason why power plants do not adopt the method of screening first and then crushing. Through long-term experiments, we have found that when the screen mesh is ≥30mm, no matter what the moisture content is, there will be no clogging and sticking.

6. According to the needs of users, some convenient devices can be added to improve the performance and grade of the product. Such as overload protection devices, automatic flipping systems, bearing temperature measurement, and remote diagnosis and other high-tech systems.

The primary crusher we produced for hard rock crushing in Bulgaria has been sent to the customer site in batches. To ensure the quality of our products, we use new raw materials and new toothed roller formulas, and add alloy rods in the toothed rollers to improve their wear resistance and hardness, and extend the service life. The toothed roller shafts are cast, annealed, quenched, roughly processed, and finely processed through a series of processes. At the same time, we invited a third-party testing company, China Petrochemical, to conduct quality inspections for us, effectively ensuring the quality of our products. We produced a mineral sizer for a Bulgarian client, which is used for handling overburden. The theoretical designed processing capacity is 4,500 tons per hour. The maximum allowable feed particle size is 1,300 millimeters. After being crushed, the output particle size is stably controlled below 300 millimeters. The drive unit is composed of four main components: a high-voltage motor, a high-speed coupling, an industrial gearbox, and a low-speed end coupling connected directly to the roller shaft. Each component is selected to handle shock load and long-term cyclic stress.
Between the gearbox and the teeth roller shaft, we use a self-aligning drum gear coupling. This coupling is installed on the low-speed end and is a patented invention developed by our R&D team. Its self-aligning crowned tooth design can compensate for misalignment during installation and operation, and absorb torsional vibration. It not only effectively reduces vibration caused by high torque, but also helps prevent impact loads from being transmitted back to the gearbox. The bearing housing support structure is a key core component of the crushing chamber and even of the entire machine. Therefore, we not only selected ZG30CrNiMo as the raw material for the support structure, but also implemented a strict and rigorous manufacturing and machining process. The machining Process are Pattern Making→Casting→Solidification Control→Annealing Heat Treatment →Ultrasonic Testing (UT) → Rough Machining →Oil Quenching and Tempering →Secondary Ultrasonic Testing and Hardness Inspection → Semi-Finish Machining.
After semi-finishing machining, the bearing housing support structure and the side plates on both sides are placed together into a heating furnace and heated to 400°C. They are then removed from the furnace and, while the temperature is still maintained, the support structure and the side plates are quickly assembled according to the drawings and tack-welded to fix their positions.
At the same time, four experienced senior welders perform simultaneous and synchronized welding at the four connection points between the support structure and the side plates. The areas that have not yet been welded are wrapped and secured with thermal insulation blankets to prevent heat loss and temperature drop of the welded components.
After all welding is completed and inspected by the quality control engineer, the entire crushing box is placed into an bath-type annealing furnace for heat treatment to relieve welding stresses. Subsequently, the complete box is mounted on a three-axis, five-face machining center for final precision machining in accordance with the drawing requirements.
These strict and meticulous series of operation requirements have won the recognition and orders of our customers. We are a professional manufacturer of crushing, screening and bulk material handling equipment. We have over 1,400 sets of advanced processing equipment and more than 30 years of rich production experience. We have the trust and choice of over 2,000 customers worldwide. Our equipment is perfectly applied in various industries such as coal, mining, power, metallurgy, building materials, chemical engineering, cement, etc. All of this is to provide our customers with high-quality products and perfect services. Our mineral sizer can be widely used in various material application scenarios such as coal, topsoil, gypsum, clay, copper ore, iron ore, nickel ore, etc.