At present, there are many stones that can be used as raw materials for sand making, including granite, basalt, limestone, quartz sandstone, pebbles, andesite, rhyolite, diabase, etc. Today we will introduce several common stones to you:
♦♦ Granite:
1. Granite is the most common raw material for sand making. It belongs to hard rock. Its Pusch hardness grade is generally 2-3, and its hardness coefficient is f=10-15.
2. Granite has a hard and dense texture, high strength, weathering resistance, corrosion resistance, wear resistance, low water absorption, and good stability.
3. The machine-made sand obtained by crushing granite can meet the standards of natural sand in terms of strength and particle shape. Granite sand is widely used in bridges, buildings, dams and paved roads.
4. When making granite sand, a combination of Jaw Crusher, cone crusher and sand making machine is generally used.
Granite
♦♦ Basalt:
1. Basalt is the strongest raw material for sand making, and its color is mostly black, dark brown or dark green. The Pusch hardness of basalt is generally level 1, and the hardness coefficient is f=20.
2. When basalt is crushed, the hammer sound is crisp, there is rebound, it shakes the hand, it is difficult to crush, and there is no water absorption reaction.
3. When making sand from basalt, a combination of jaw crusher, Cone Crusher and sand making machine is generally used.
Basalt
♦♦ Limestone:
1. Limestone belongs to carbonate rock, and its main component is calcite. It is generally gray, grayish white, grayish black, etc.
2. Limestone is divided into two types: relatively strong and relatively soft limestone. The Pusch hardness of relatively strong limestone is generally level 4-5, and the hardness coefficient is f=4-6. The Pusch hardness of relatively soft limestone is generally level 6, and the hardness coefficient is f=2.
3. When limestone is crushed, the hammer sound is not crisp, there is no rebound, it is easy to crush, and it has strong water absorption.
4. When making sand from limestone, a combination of jaw crusher, impact crusher and Sand Making Machine is generally used.
Limestone
♦♦ Pebbles:
1. Pebbles are a common high-quality sand-making raw material. They are the best choice to replace natural sand in terms of strength, particle shape and color. Pebbles are hard rocks, and their Puerto Rico hardness is generally 2-3, and the hardness coefficient is f=10-15.
2. When pebbles are broken, the hammer sound is relatively crisp, there is rebound, shaking hands, difficult to break, and basically no water absorption reaction.
3. When making pebbles, a combination of cone machines and sand making machines is generally used.
Pebbles
♦♦ Quartz sandstone:
1. The main component of quartz sandstone is quartz, which may contain hematite and goethite. Quartz sandstone is a hard rock, and its Puerto Rico hardness is generally 2-3, and the hardness coefficient is f=10-15.
2. When quartz sandstone is broken, the hammer sound is relatively crisp, there is rebound, shaking hands, difficult to break, and basically no water absorption reaction. Quartz sandstone is a high-quality raw material for sand making. The machine-made sand obtained by crushing quartz sandstone can reach or even surpass natural sand in strength and particle shape.
3. When making quartz sandstone, a combination of jaw crusher, cone crusher and sand making machine is generally used.
Quartz sandstone
♦♦ Knowledge expansion-rock hardness grade:
Rocks graded according to the Pugh rock hardness classification method are divided into grades 1-10. Among them, grade 1 is the strongest rock, with a hardness coefficient of f=20, and grade 10 is the softest quicksand or soil, with a hardness coefficient of f=0.3-0.8.
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