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AnalysisOfGypsumIndustryChain
The upstream of gypsum industry chain mainly includes raw materials and fuel power required in production and processing, including natural gypsum and industrial by-product gypsum (phosphogypsum, desulfurized gypsum, etc.); The middle reaches are the production, processing and manufacturing of gypsum products; Downstream mainly includes construction industry, chemical industry (cement), agriculture, pharmaceutical industry and other application industries. The upstream of gypsum is mainly raw materials and fuel power required in production and processing, mainly including natural gypsum and industrial by-product gypsum (phosphogypsum, desulfurization gypsum, etc.).
At present, because the distribution of natural gypsum is too centralized, the proportion of high-quality resources is relatively low, and the mining is not standardized, it is easy to damage the environment and cause safety accidents, and the industrial
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by-product gypsum is piled up in large quantities, so phosphogypsum and desulfurized gypsum gradually replace natural gypsum and become the main raw materials of gypsum board.
Phosphogypsum is a solid waste produced in the wet-process phosphoric acid process. It is a kind of fine powdery solid with gray-white or yellow-white color and mainly in the form of needle-like crystals, polycrystalline nucleated crystals, monodisperse plate-like crystals, and dense crystals.
It has the characteristics of high temperature resistance and chemical corrosion resistance. After purification, calcination and modification, phosphogypsum is mainly used in agriculture, building materials, industry and other fields. Among them, building materials are the main application field, with the demand accounting for more than 35%.
In recent years, with the continuous improvement of the resource utilization technology, the new stacking volume of phosphogypsum has maintained a stable interval operation, and the comprehensive utilization rate has risen steadily. The data shows that the comprehensive utilization rate of phosphogypsum has increased from 39.57% in 2017 to 41.72% by March 2023.
However, at present, due to the relatively lagging standards and specifications of phosphogypsum comprehensive utilization products and the lack of industrial policy barriers, and the lack of successful experience in the promotion and promotion of new building materials products, it is difficult to promote phosphogypsum on a large scale.
1. Phosphogypsumhttps://m.gravelmill.com/knowledge/what-is-gypsum-and-gypsum-grinding-mill.html
2. Desulfurized gypsum
Desulfurized gypsum is an industrial by-product obtained by coal or oil industrial enterprises after treating sulfur dioxide in flue gas. Its main component is the same as natural gypsum, which is calcium sulfate dihydrate CaSO4 • 2H2O. Its water content is generally about 10% or higher, and its fluidity is poor.
Desulfurized gypsum is widely used in power, thermal production and supply industry, ferrous metal smelting and calendering industry, nonferrous metal smelting and calendering industry, chemical raw materials and chemical products manufacturing industry, etc. Among them, electric power, thermal power production and supply industry are the main application fields.
In recent years, the overall output of desulfurized gypsum has increased. According to the data, in 2019, the output of desulfurized gypsum produced by industrial enterprises under the key survey was 130 million tons, an increase of 8.3% year on year.
The comprehensive utilization increased, but the overall comprehensive utilization rate declined. The data shows that the comprehensive utilization of desulfurized gypsum by industrial enterprises in 2019 was 96.174 million tons, up 4.3% year on year; The comprehensive utilization rate was 71.3%, down 2.3 percentage points from 2018.
Gypsum Midstream Industry
1. Gypsum board
Gypsum board is a new type of wall building material made of building gypsum as the main raw material, adding additives and fibers. It is a kind of building material with
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light weight, high strength, thin thickness, convenient processing and good performance of sound insulation, heat insulation and fire protection, and is one of the new lightweight panels that are currently focused on development.
Compared with traditional clay solid and hollow bricks, gypsum board has excellent properties such as light weight, high strength, thermal insulation, fire and sound insulation, convenient construction, and space saving. At present, it has been widely used in internal partitions, wall cladding panels (instead of wall plastering), ceilings, sound-absorbing boards, ground base plates, and various decorative panels of various buildings such as office buildings, stores, hotels, industrial plants, and residential buildings.
In recent years, with the continuous investment and construction of gypsum industry projects, the production capacity of gypsum board has been expanding. According to statistics, by the end of 2021, the production capacity of gypsum board industry was
4.9 billion square meters, an increase of 120 million square meters compared with 2020.
With the continuous expansion of production capacity, the output of gypsum board keeps growing. According to the data, the output of gypsum board in 2021 will be
3.51 billion square meters, with a year-on-year increase of 4.78%.
Gypsum powder is one of the five major gel materials and plays an important role in the national economy. It is widely used in many application fields such as architecture, building materials, industrial molds and art models, chemical industry and agriculture,
2. Gypsum powderhttps://m.gravelmill.com/knowledge/what-is-gypsum-and-gypsum-grinding-mill.html
food processing, medicine and beauty, and is an important industrial raw material.
Gypsum Downstream Industry
Gypsum is widely used in construction industry, chemical industry (cement), agriculture, pharmaceutical industry and other fields, with construction industry and chemical industry (cement) as the main application industries.
1. Construction industry
The construction industry refers to the material production department in the national economy that is engaged in the survey, design, construction of construction and installation projects and the maintenance of existing buildings.
2. Cement industry
Cement is a powdery hydraulic inorganic cementing material. After mixing with water, the slurry can be hardened in air or water, and can firmly cement sand, stone and other materials together. Cement is an important cementing material, which is widely used in civil construction, water conservancy, national defense and other projects.