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Detailed explanation of the production process of sand and gravel aggregate dry method, wet method and combined dry and wet method

Release time:Apr.20.2024 Views:0

With the continuous development of infrastructure construction and new industrialization(stone crusher), the consumer demand for sand and gravel aggregates in my country has maintained a growing trend. If you want to produce high-quality sand and gravel aggregates, you need to make early planning, establish a sand and gravel production line, and choose an appropriate production process. The sand and gravel aggregate production line mainly consists of a material conveying system, a crushing system, a screening system and a manufacturing system. The sand system consists of sand and gravel aggregate production processes that are mainly divided into the following three types:


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Dry production process

The so-called dry production process means that during the crushing and screening of parent rock, sand and gravel shaping and processing processes, except for the spray dust reduction in individual dust removal processes and the spraying of a small amount of water to prevent the segregation of finished sand, the entire production line process basically does not use water. . The dry process is suitable for areas with simple geological conditions of parent rock, less overburden, less faults and fissure soils, less impurities such as soil and organic matter in the ore, and areas with arid climate, little rain, and lack of water resources.

Wet production process

The so-called wet production process means that the materials are washed with water during the crushing and screening process, and the coarse and fine aggregates are washed with a stone washing machine and a sand washing machine. During the production process, water is used as a working medium and dust suppression measure, and it participates in the entire production of sand and gravel aggregates, so it is called a wet process. The wet process is suitable for areas with a high content of impurities such as soil and organic matter in the ore, and areas with abundant rainfall and water resources.

Generally, the wet process is used when the raw materials contain a lot of mud or weak particles, and when the finished sand and gravel powder content is high, the wet process can also be used to remove part of the stone powder. According to the different properties of the soil contained in the raw materials, the sand and gravel cleaning methods can be divided into screen surface washing and sand and gravel cleaning machine cleaning. As for the specific cleaning method, it should be based on the degree of mud in the raw materials, the properties of the soil, the processing volume, etc. Determined by comprehensive analysis of factors.

Dry and wet production process

The water consumption of this production process is between the wet and dry production processes. It generally refers to the front-wet and then-dry production process, that is, the pre-screening is produced by the wet process and the moisture content of the discharge is controlled, and the sand making screen is shaped. The sub-system adopts dry production process.

The typical process flow is similar to that of the wet process. In the pre-screening process, impurities such as soil and stone powder on the stone must also be washed with water. After washing, the ore with a particle size less than 5-40 mm enters the sand making process. The difference is that the finished sand part or All are no longer washed. It is widely used in sand and gravel plants built with hydropower projects in southern my country that use limestone as the main raw material.

As my country's sand and gravel aggregate processing industry matures, develops in standards, and has increasingly strict environmental protection requirements, the main downstream users of the sand and gravel industry - concrete mixing stations and dry-mixed mortar companies - have increasingly higher quality requirements for machine-made sand and gravel. , therefore, only by choosing the appropriate production process, controlling the quality of sand and gravel aggregates, improving the quality of finished products, and producing high-quality machine-made sand and gravel aggregates is the long-term development path for the company in the future, and high-quality sand will naturally not have to worry about it. market.


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Xingao Nai Heavy Industry has been engaged in the sand and gravel aggregate crushing and screening equipment industry for many years. It has strong market competitiveness in the production and processing of sand and gravel aggregates. Taking the heavy hammer crusher as an example, this equipment adopts advanced casting technology. With efficient and excellent production capacity, low investment and maintenance costs, and high-tech energy-saving and environmentally friendly technologies, it can effectively create higher economic benefits for the company's sand and gravel aggregate production line.