Coarse aggregate, fine aggregate, natural sand, machine-made sand, mixed sand. If you want to invest in a sand factory, you must first understand these professional terms! What size of stones and sand are they? Today, let’s talk about science in detail.
1. Aggregate: granular loose materials such as rock particles that play the role of skeleton, filling and stabilizing volume in concrete. According to the particle size, it can be divided into coarse aggregate and fine aggregate.
2. Coarse aggregate (stone): rock particles larger than 4.75mm in size, including pebbles and crushed stones: Pebble: rock particles larger than 4.75mm in size formed by natural weathering, water flow handling, sorting, and accumulation. Crushed stone: Rocks, pebbles, and mine tailings that have not been treated by chemical methods are made by processes such as soil removal, mechanical crushing, shaping, screening, and powder control. The particle size is greater than 4.75mm.
3. Fine aggregate (sand): rocks and particles with a particle size less than 4.75mm, including natural sand and artificial sand.
4. Natural sand: naturally formed, artificially mined and screened rock particles with a particle size of less than 4.75mm, including river sand, lake sand, mountain sand, desalinated sea sand, but excluding soft and weathered rock particles.
5. Artificial sand: including machine-made sand and mixed sand.
6. Machine-made sand: rocks, pebbles, and mine tailings that have not been treated by chemical methods are made by processes such as soil removal, mechanical crushing, shaping, screening, and powder control. The particle size is less than 4.75mm.
7. Mixed sand: sand made by mixing natural sand and machine-made sand in a certain proportion.
The quality of the finished sand of machine-made sand directly affects the economic benefits of sand production. A good finished machine has uniform particle size, beautiful grain shape, good quality, low needle flake content and high cleanliness. This requires a good-quality sand making machine, and the finished sand processed by a good sand making machine has a controllable grain size, and the output can meet the production needs of users. The PLS series vertical impact crusher of Luoyang Dahua Heavy Industry is recommended here.
The PLS series impact sand making machine is a new generation of sand making equipment with very high cost performance and one of the most popular equipment on the market. The advantage is that the sand making effect is very good, and the efficiency is very high, and it has both sand making and shaping. It has dual functions and adopts a deep cavity impeller design, which can increase the throughput of stones. The sealed cavity design of the equipment reduces the influence of dust and noise, and truly realizes green and environmental protection.
1. A manual hydraulic pump can be configured to adjust the flow rate of the impeller. At the same time, in conjunction with the adjustment of the height of the distribution plate, it can accurately control the ratio of the impeller to the circumferential waterfall.
2. Suspended manual or electric hoist can be configured. During equipment inspection and maintenance, the machine cover, feed hopper, distributor, impeller, main shaft, etc. can be easily lifted and it is convenient and quick.
3. It can be equipped with a hydraulic lifting and opening device, which is convenient for lifting and rotating the feeding hopper during equipment maintenance.
4. The equipment has two crushing modes: "Stone-beat-stone" and "Stone-beat-iron", and these two modes can share a set of crushing chambers. By simply replacing parts, the crushing of "Stone-beat-stone" and "Stone-beat-iron" can be achieved.
5. The thin oil lubrication system and PLC automatic control and monitoring system can be optionally configured, which can timely monitor the feed volume, current, oil temperature, spindle temperature, vibration protection and other functions.