I. Scope of application and differences in use

(1) Application scope and purpose of sand making machine

Sand making machine is suitable for crushing and shaping soft or medium hard and extremely hard materials, and is widely used in various ores, cement, refractories, alumina clinker, emery, glass raw materials, machine-made building materials, gold slag and so on. Especially for high hardness and superhard wear-resistant materials such as silicon carbide, emery, sintered bauxite and fine sand, the output efficiency is higher than other types of crushers. In the engineering field, it is an ideal production equipment for machine-made sand, cushion material, asphalt concrete and cement concrete aggregate.

(II) Application scope and purpose of sand washer

Sand washing machines are widely used in construction sites, sand and gravel factories, concrete dam sites of hydropower stations and other industries. It has the advantages of high cleaning degree, reasonable structure, large capacity, low power consumption and less sand loss during sand washing. In particular, the transmission part of the sand washer is isolated from water and sand, so its failure rate is much lower than that of the commonly used sand washer at present, and it is a better choice for upgrading the domestic sand washer industry.

Second, the differences in working principles.

(1) working principle of sand making machine

The working principle of full-center feeding of sand making machine: the material falls into the hopper, enters the high-speed rotating rotor through the central feeding port, fully accelerates and is thrown out through the launching port. First, it collides with a part of the material that falls freely after rebounding, and then collides with the vortex lining (or impact block) in the surrounding vortex cavity. First, it bounces back to the top of the crushing cavity, then deflects downward, collides with the material discharged by the impeller wheel, forms a continuous material curtain, and then is discharged through the lower discharge port.

The working principle of central feeding of sand making machine is accompanied by annular waterfall feeding: the material falls into the feeding hopper, then falls through the annular hole and is divided into two strands by the bulk tray. One stream enters the impeller rotating at high speed through the distributor, and the other stream falls from the periphery of the distributor. The material entering the impeller is rapidly accelerated in the impeller and then thrown out at high speed. They first collide with another part of the material falling freely around the bulk tray, then collide with the vortex lining (or impact block) in the surrounding vortex cavity, then bounce back to the top of the crushing cavity, and then deflect downward to collide with the material ejected by the impeller wheel to form a continuous material curtain.

(2) The working principle of the sand washer

When the sand washer is working, the motor drives the impeller to rotate slowly after decelerating through the V-belt, the reducer and the gear, and the sand enters the washing tank with the feed tank, which is driven by the impeller to roll and grind each other, so as to remove impurities covering the sand surface and destroy the water vapor layer covering the sand particles, which is beneficial to dehydration; At the same time, water is added to form a strong water flow, which takes away impurities and foreign bodies with small specific gravity in time and discharges them from the overflow washing tank to complete the cleaning function. The clean sand and gravel are taken away by the blades, and the sand and gravel behind them are poured into the discharge chute from the rotating impeller to complete the sand and gravel cleaning function.

Third, differences in performance characteristics.

Performance characteristics of (1) sand making machine

1. Simple and reasonable structure, self-crushing, ultra-low use cost;

2. The unique bearing installation and advanced spindle design make the machine have the characteristics of heavy load and high speed rotation.

3. It has fine grinding and coarse grinding functions;

4. High reliability and strict safety devices to ensure equipment and personal safety;

5. Smooth operation, low working noise, high efficiency and energy saving, and high crushing efficiency;

6. It is less affected by the moisture content of materials, and the moisture content can reach about 8%;

7. Wear parts have low loss, and all wear parts are made of high-quality wear-resistant materials at home and abroad, with long service life. A small number of wearing parts are made of superhard wear-resistant materials, which are small in size and light in weight and easy to replace accessories.

8. The airflow in the vortex cavity is self-circulating, and the dust pollution is small.

9. The self-lining of the impeller and the materials in the vortex crushing cavity greatly reduces the cost and maintenance workload of the wearing parts. In the production process, stone can form a protective bottom layer, and the fuselage is wear-free and durable.

10. Various installation methods, mobile installation.

1 1. The product is cubic, with high packing density and less iron pollution. Can be used as a stone shaper.

(2) Performance characteristics of sand washer

1. The sand washer has simple structure and stable performance. Impeller-driven bearing device is isolated from water and water-receiving substances, which greatly avoids the damage of bearings caused by water immersion, sand and pollutants. reference data

2. The loss of medium-fine sand and stone powder is less, and the gradation and fineness modulus of washed building sand reach the national standards for building sand and building pebbles and gravels.

There are almost no wearing parts except the screen.

4. Long service life and no maintenance for a long time.