Sand and gravel aggregate is one of the main materials in the infrastructure construction industry. With the rapid development of the infrastructure industry, the supply of sand and gravel aggregate is in short supply, resulting in a large demand gap. Therefore, local governments are actively promoting the development of the machine-made sand industry in order to achieve a balance. demand and supply. So, how much does it cost to invest in a stone crusher? Let’s take a look.
After the large stones are broken, they become sand and gravel aggregates, which are widely used in infrastructure industries such as highways, railways, bridges, etc., and the use of sand and gravel aggregates has different requirements for stone specifications. Generally, stone sand production requires grain size. If the diameter is less than 4.75 mm, the sand is classified according to the fineness modulus (the larger the fineness modulus, the coarser the sand):
Coarse sand: fineness modulus 3.7-3.1, average particle size above 0.5mm;
Medium sand: fineness modulus 3.0-2.3, average particle size 0.5-0.35mm;
Fine sand: fineness modulus 2.2-1.6, average particle size 0.35-0.25mm;
Ultra-fine sand: fineness modulus 1.5-0.7, average particle size below 0.25mm.
What are the commonly used crushing equipment in sand and gravel plants?
The jaw crusher is almost the necessary rough crushing equipment on the sand and gravel production line. The core structural components are the jaw plate and the frame. The two jaw plates crush materials by simulating the chewing action of animals. The structure is simple and the crushing ratio is large. The particle size of the block material is reduced to less than 400mm, and the material with qualified particle size is provided for the subsequent medium crushing process. Feed particle size: 120-1500mm Production capacity: 1-2200t/h.
The cone crusher is different from the impact crushing equipment. It adopts the principle of lamination and crushing. The crushing cavity type and the crushing frequency are skillfully combined. There is no crushing blind area. Production of flakes and fines. It is divided into three types: coarse crushing, medium crushing and fine crushing.Feed particle size: 65-300mm, finished product size: 3-60mm, production capacity: 12-1000t/h.
- Impact crusher
The impact crusher is also known as the third-generation impact sand making machine. The combination of “stone hitting stone” and “stone hitting iron” can realize crushing and sand making. It is cubic, free of tension and cracks, the fineness modulus is adjustable, the gradation is reasonable, and the amount of associated stone powder is small. Feed size: 30-60mm, finished product is standard machine-made sand less than 4.75mm, processing capacity: 12-650t/h.
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