1. Why river pebble sand making is so popular?
In addition to river pebbles, many raw materials like granite, limestone, quartz sandstone, basalt and even construction waste can be used for processing mechanism sand, but in the face of so many strong rivals, why river pebbles are still so loved?
First of all, river pebbles are widely distributed, rich in resources, easy to mine and low mining costs, it meets the needs of large-scale production.
Secondly, river pebbles are hard rocks with a hardness factor of f=10-15 and a hardness grade of 2-3 on the Platts scale, which are hard, resistant to pressure, wear and corrosion.
Finally, if river pebbles are used as the raw material for processing mechanism sand, the amount of stone powder in the production process is relatively small, and the material is stable, with good performance, and the quality of finished products is easy to control, so the mechanism sand made from river pebbles is of excellent quality and stable performance. It is the preferred construction sand for high-rise buildings, highways, municipal projects, water conservancy and hydropower, bridges and other infrastructure.
2. Key equipment list in a river pebble sand making plant
River pebbles’ own advantages are the reason for its popularity, but if the investors want to process high-quality fine mechanism sand, it is also especially important to choose the right production equipment for the sand making plant!
1. Primary crushing by jaw crusher
Jaw crusher has excellent crushing force and crushing ratio, and it is the main equipment of the production line. In addition, the jaw crusher is better in wear resistance and lower maintenance cost, also the jaw crusher can process a wide range of materials.
2. Secondary crushing by Symons cone crusher
Symons cone crusher is suitable for processing various medium-hard materials and hard materials, especially for river pebbles, granite, basalt, which are commonly used raw materials for sand making. The finished product of cone crusher has good granularity. The equipment has high abrasion resistance parts, which is a good choice for secondary crushing processing.
3. Tertiary crushing by VSI sand making machine
Although there are more kinds of equipment for sand making in the market, like hammer crusher, double roll crusher, vertical crusher, etc, they are not as effective as VSI sand making machine, none of them can match the effect of VSI sand crusher. It may attract questions, but the technology and finished product quality of VSI in the field of sand making are well documented. The crushing principle of VSI is “stone strikes stone”, the production efficiency is relatively high, the wearable parts are wear-resistant, and the corresponding maintenance cost is low. Take the comprehensive variety of characteristics into consideration, VSI sand making machine can be and should be the first choice for sand making plant.
4. Sand washer
Sand washer is installed at the end part of the sand making plant. It is mainly used to remove the impurities such as mud on the surface of the mechanism sand. Through the sand washing procedure, the quality of the mechanism sand will be better, and the corresponding market value will be higher.
5. Vibrating screen
Vibrating screen is the most common screening equipment in a sand making plant and stone crusher plant, which can separate various kinds of stone materials to different groups according the the layer mesh size. Generally there are three and four layers of vibrating screens, it is mainly used in a sand making plant to form a cycle operation and screen materials to different groups.
6. Vibrating feeder and belt conveyor
These two are auxiliary equipment in the sand making plant production line, but they are also indispensable. Vibrating feeder is generally used for the feeding of primary jaw crusher, while belt conveyors are the connecting equipment between each main equipment of the whole sand production line.
Above major equipment makes a sand making plant if they are arranged well. The actual power, discharged size, process capacity can be customized according to investors’ requirements.
3. Attentions should be paid for the sand making plant by river pebbles
1. VSI sand making machine clogging
Fast speed feeding and overload feeding will cause blockage easily. Users should equip the sand making machine with corresponding capacity according to the production volume of their production line. Materials should be fed evenly and continuously.
Sand making machine discharge opening is not smooth or blocked, it is caused by fast feeding, which makes this machine blocked, thus affecting the production.
Sand making machine hammer bars fracture, aging, crushed stone moisture content is too high, these will make the sand making machine blockage. The operator should replace fracture and serious aging of the hammer bars in time.
2. VSI sand crusher maintenance
1. The river pebble sand making machine should be added grease every 8 hours. After 2000 hours working, the main shaft assembly should be checked, clear the bearings. Replace new bearings after 7200 hours.
2. The operator should pay attention to the daily maintenance of VSI sand making machine. It should be shut down regularly and check the internal wearing parts. If the spares are worn out, new spares should be replaced in time. In addition, it should be noted that in the normal operation of the sand making machine, in order to avoid dangerous accidents, the observation hole should not be opened.
3. The tension of the drive V-belt should be properly adjusted, it will ensure the V-belt is grouped and matched, thus the length of each group is as even as possible. The current difference between two motors should not exceed 15A.
3. Production safety
1. Iron removal work during feeding must be strengthened, non-breakable materials like iron fall to the crushing chamber will block or even damage the sand making machine. Magnetic separator should be installed in front of the VSI sand crusher to remove iron.
2. During operation, the operator should pay special attention to the safety, because the sand making macihe is high rotation speed equipment. The operators should be far away from the equipment, and wearing good labor protection supplies.
3. If need maintenance, the power should be fully cut before next operation.
4. Always operate and maintain the VSI sand making machine according to the manual supplied by Deya Machinery.