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Industry
What Requirements Does VSI New Sand Making Machine Have on Ores?
VSI new sand making machines crush materials mainly depending on automatic crushing among materials with rapid rotation and on friction among materials (stones hitting stone). They have wide application in coarse and refined crushing of those quite hard, moderately hard, and abrasive materials. But they are most applied in sand making industry. When VSI new sand making machines make sands, the ores material need to meet some necessary requirements.
1) It is required that the particles of crushed materials be tiny. Generally speaking, there are no strict requirements on flakiness. Flakiness materials can get easily crushed after entering crusher. Requirements on crushed stones are contrary to the above. There are strict requirements on particle shapes and grades. The reason is that cube sands are most suitable to be aggregates of concrete and bitumen. Machine-made sands not only improve the strength of concrete, but reduce the quantity of cement, thus decreasing expenses. In the next place, cube sands are interlocked each other owing to edges. The continuous grading of sands can reduce the gap greatly. Meanwhile, cube sands occupy larger areas than round sands in order to make bitumen and materials or cement and materials stick together, reducing the possibility of displacement;
2) According to the definition of machine-made sands, they are crushed by machines and screened to rock particles whose size is less than 4.75mm, excluding particles of soft rocks and decayed rocks;
3) Sand specifications are divided into coarse, intermediate and refined in accordance with fineness modulus, of which the fineness modulus of coarse sand is 3.7~3.1, that of intermediate sand is 3.0~3.3, and that of refined sand is 2.2~1.6;
4) Sand grades include I, II and III in accordance with technical requirements. Grade I sands are applicable to concrete whose strength grade is more than C60. Grade II sands are appropriate for concrete whose strength grade is C30~C60, and those meeting antifreezing, impervious and other requirements. Grade III sands are applicable to concrete whose strength grade is less than C30 and building mortar;
5) The particle size of sand is between 4.75~0.15mm, and stone flour with less than 0.075mm should cover certain limit. Its size fraction includes 4.75, 2.36, 1.18, 0.60, 0.30 and 0.15. It’s best to be continuous. And each size fraction should have certain percentage. It is best that its particle size is cube. There are certain requirements on the quantity of frakiness.
6) Ores used in sand making generally include granite, basalt, natural cobble, andesite, rhyolite, diabase, diorite, sandstone and limestone etc. The manufactured sands have different strengths and requirements in accordance with diversified categories of rocks.
1) It is required that the particles of crushed materials be tiny. Generally speaking, there are no strict requirements on flakiness. Flakiness materials can get easily crushed after entering crusher. Requirements on crushed stones are contrary to the above. There are strict requirements on particle shapes and grades. The reason is that cube sands are most suitable to be aggregates of concrete and bitumen. Machine-made sands not only improve the strength of concrete, but reduce the quantity of cement, thus decreasing expenses. In the next place, cube sands are interlocked each other owing to edges. The continuous grading of sands can reduce the gap greatly. Meanwhile, cube sands occupy larger areas than round sands in order to make bitumen and materials or cement and materials stick together, reducing the possibility of displacement;
2) According to the definition of machine-made sands, they are crushed by machines and screened to rock particles whose size is less than 4.75mm, excluding particles of soft rocks and decayed rocks;
3) Sand specifications are divided into coarse, intermediate and refined in accordance with fineness modulus, of which the fineness modulus of coarse sand is 3.7~3.1, that of intermediate sand is 3.0~3.3, and that of refined sand is 2.2~1.6;
4) Sand grades include I, II and III in accordance with technical requirements. Grade I sands are applicable to concrete whose strength grade is more than C60. Grade II sands are appropriate for concrete whose strength grade is C30~C60, and those meeting antifreezing, impervious and other requirements. Grade III sands are applicable to concrete whose strength grade is less than C30 and building mortar;
5) The particle size of sand is between 4.75~0.15mm, and stone flour with less than 0.075mm should cover certain limit. Its size fraction includes 4.75, 2.36, 1.18, 0.60, 0.30 and 0.15. It’s best to be continuous. And each size fraction should have certain percentage. It is best that its particle size is cube. There are certain requirements on the quantity of frakiness.
6) Ores used in sand making generally include granite, basalt, natural cobble, andesite, rhyolite, diabase, diorite, sandstone and limestone etc. The manufactured sands have different strengths and requirements in accordance with diversified categories of rocks.