Alumina powder is white, odorless and tasteless, reliable in organic chemistry, high in purity, and good in dielectric strength. It is also known as bauxite (mainly composed of alumina) in mining, pottery and materials science. With the rapid development of electrolytic aluminum, ceramics, medicine, electronics, machinery and other industries, there is still a large room for growth in the market demand for alumina, and the output of alumina will also continue to increase. In addition to the above-mentioned industries, alumina is also widely used in different fields such as aerospace industry, automobile industry, semiconductor industry, etc. The large demand for alumina has brought a lot of alumina transactions to the international market. Therefore, how to store and transport alumina powder safely and properly has become a concern of many alumina powder manufacturers and buyers.

Slag powder is the abbreviation of granulated blast furnace slag powder. It is ground from slag in steel plants or mineral processing plants. The surface of the slag particles is smooth and dense, and has high potential activity. Under the action of the activator, it can combine with water to form a hydraulic gelling material. Slag powder is an important additive for cement and concrete, which can reduce the amount of cement, save costs, reduce concrete hydrothermal heating and improve concrete strength, and is widely used in construction and other industries. Due to its low cost and high strength, many enterprises and factories choose to buy slag powder in large quantities, but how to store slag powder to keep it in the best condition during storage has become the most concerned issue of these businesses.

Lime is an air-hardening inorganic gelling material mainly composed of calcium oxide. Lime is made of products with high calcium carbonate content such as limestone, dolomite, chalk, and shells, which are calcined at 900-1100°C. The raw materials of lime are widely distributed, the production process is simple, and the cost is low. It is also an important raw material in the building material industry. And it is suitable for products in instrumentation, medicine, clothing, electronic telecommunications, leather, textile and other industries. Many companies have a large demand for lime in their production process. Therefore, how to store lime safely has become a concern of many manufacturers.

Cement clinker is mainly made of limestone and clay. Raw materials are formed in appropriate proportions, burned until part or all of them are melted, cooled and broken into lumps or large granular substances. Clinker is a material used as a cement binder and is a nodular material. Typically, clumps or nodules of clinker range in size from 3 mm to 25 mm in diameter and are dark gray in color. If stored in dry conditions, clinker can be kept for several months without noticeable loss of quality. Because clinker can be easily processed by ordinary beneficiation equipment, there are a large number of clinker transactions in the world. How to store the clinker and ensure its quality has become a concern for clinker producers and buyers.

Cement is a powdery hydraulic inorganic gelling material. After adding water and stirring, it becomes a slurry, which can be hardened in air or in water, and can firmly bind sand, stone and other materials together. The concrete made of cemented crushed stone not only has high strength after hardening, but also can resist the erosion of fresh water or salt water. Mortar or concrete made of cement is widely used in civil construction, transportation, water conservancy, electric power, petroleum, chemical engineering and other engineering constructions. It is the basic material for the development of the construction industry, especially steel-concrete buildings, and is called the grain of the construction industry. Many enterprises use a large amount of cement in the production process. Therefore, how to store cement safely and properly has become a concern of many owners.

Coal is the main energy source for steam power generation, mainly composed of elements such as carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus. The sum of carbon, hydrogen, and oxygen accounts for more than 95% of organic matter, and is a very important energy source. It is also an important raw material for metallurgy and chemical industry, and can be classified into lignite, bituminous coal, anthracite, and semi-anthracite. In the past, coal was mostly stored in the open air, but the coal stored in this way is easy to deteriorate and lose its high combustion value, and the coal is easy to weather after being dried, and it is blown everywhere with the strong wind to pollute the environment. Therefore, with the continuous improvement of coal enterprises' requirements for automatic production, silo coal storage has been widely developed and used.