What factors are affecting the profitability of sand and gravel enterprises

1. Sand and gravel aggregate is an important part of concrete, accounting for about 60% or more of the volume fraction of concrete, and is widely used in the construction of infrastructure projects. With the massive mining of natural sand and gravel, the sand and gravel resources in the river become less and less, and the cost of mining is also higher. Therefore, the research on the preparation of renewable sand and gravel aggregate for concrete based on the crushing of construction solid waste is of great significance.

2.Development Status of Concrete Aggregate Sand and gravel aggregate is the second largest natural consumable material.The total global production of sand and gravel aggregate is about 50 billion tonnes in 2019, of which about 20 billion tonnes are produced in China, accounting for into half of the total global production. India's total sand and gravel aggregate production is about 5 billion tonnes, ranking second. The total output of sand and gravel aggregate in the United States is about 2.5 billion tonnes, an increase of nearly 5% year-on-year, and the total output is ranked third in the world.In 2020, the output of China's concrete industry in the first half of the year will be about 1.2 billion cubic metres, and the cumulative total output of the first nine months will be about 2.0 billion cubic metres, and the national total output of concrete will be the same as that of 2019. However, the current real estate downturn, infrastructure investment is not as expected, the start rate of concrete enterprises is less than 50%, and even less than 30% in some regions, and the market competition is gradually entering into white heat. At the same time, large cement, building materials, urban investment enterprises have set foot in the sand and gravel industry, sand and gravel production capacity concentration continues to improve, many large-scale green sand and gravel mine projects have landed. In the face of the sand and gravel market supply and demand imbalance, overcapacity, sand and gravel prices have fallen again and again in the market dilemma. The key to determine whether the enterprise is competitive is to ensure the quality of the case of cost savings.

The primary factor that determines the cost is the regional location of the mine, under the premise of excluding the interference of the regional location, the quality of the product and the production line process will become the key to the profitability of the enterprise.

3. Sand and gravel aggregate production cost control. In recent years, many enterprises focus on green environmental protection, investing huge sums of money in the construction of mine ecological environment, ignoring the design and construction of sand and gravel production line is unreasonable this important issue, resulting in the project production and operation costs are too high. Targeted analysis of the physical and chemical properties of the mother rock of the mine, combined with the market positioning of the enterprise's products, tailor-made process solutions, not only can use technology to protect the quality of the product, but also in the design stage can do a good job in the production cost of the preset and control.

The production process of sand and gravel aggregate prepared from the mother rock of the mine is designed, and after the physical and chemical analysis of the mother rock of the mine, a targeted production programme is designed, through two-stage, three-stage, or even four-stage crushing programme, to ensure that each process section has a reasonable crushing ratio, which in turn ensures a reasonable value of energy consumption and product structure, and also to optimize the design of sand and gravel aggregates, for the high-quality aggregates of the gradation, particle size and other core requirements, the process design around the above core points Requirements, process design around the above core points for product optimisation design, selective ‘more screen less broken’ and shaping, improve product quality. And so on, you can click on customer service to consult immediately.

4. Recycled sand and gravel aggregate concrete. In the use of copper tailings in the preparation of mechanical sand found in the process of copper mining region of the waste rock does not need to be distinguished can be used directly, while copper tailings waste rock also has excellent mechanical properties, copper tailings waste preparation of mechanical sand can meet the strength requirements of concrete aggregates. The mechanism sand prepared from iron tailings waste stone completely replaces natural sand and gravel, and concrete with iron tailings sand and gravel aggregate is prepared and its workability, mechanical properties and durability are studied. ......

5.Outlook. Renewable sand and gravel are important both environmentally and economically compared to natural sand and gravel as concrete aggregate. A large number of studies have shown that numerous solid wastes crushed as renewable aggregates have great potential for application in the production of concrete products. Mechanism sand production equipment - building station type mechanism sand production system, in the production and processing of mechanism sand process has a certain representative. OCP Machinery Company, for example, the company's granite crushing sand production project built in Inner Mongolia, granite as raw material, after coarse crushing, medium and fine crushing, shaping and screening and de-soiling screening treatment, to obtain 0-5mm, 5-10mm, 10-20mm, 20-31.5mm of finished products, has been put into operation for more than a month, the operation effect is good, highly praised by the user.