What is gypsum powder in power plants?
In industrial production, gypsum dust from power plants is a common by-product, especially in coal-fired power plants. With the improvement of environmental protection requirements and the promotion of comprehensive utilization of resources, the use and value of gypsum powder have gradually attracted attention. This article will introduce in detail the source, composition, and uses of power plant gypsum powder, as well as hot topics and hot content in the past 10 days.
1. Source of gypsum powder from power plants
Power plant gypsum powder mainly comes from the flue gas desulfurization process of coal-fired power plants. Coal-fired power plants produce a large amount of sulfur dioxide (SO₂) during the combustion process. In order to reduce air pollution, wet desulfurization technology (such as limestone-gypsum method) is usually used. In this process, the limestone slurry reacts with SO₂ in the flue gas to generate gypsum (CaSO₄·2H₂O), which is dehydrated to form gypsum powder.
2. Composition of power plant gypsum powder
The main component of power plant gypsum powder is calcium sulfate dihydrate (CaSO₄·2H₂O), and also contains a small amount of impurities, such as unreacted limestone, fly ash, etc. The following is an analysis of the chemical composition of typical power plant gypsum powder:
| Element | content(%) |
|---|---|
| CaSO₄·2H₂O | 90-95 |
| CaCO₃ | 1-3 |
| fly ash | 0.5-2 |
| Moisture | 5-10 |
3. Uses of gypsum powder in power plants
Power plant gypsum powder has a wide range of uses, especially in the construction and building materials industries. The following are its main application areas:
1.building materials: Gypsum powder is the main raw material for the production of gypsum boards, gypsum blocks and other building materials.
2.Cement retarder: Adding gypsum powder in cement production can adjust the setting time of cement.
3.soil improvement: Gypsum powder can be used to improve alkaline soil and improve soil air permeability and water retention.
4.Other industrial uses: Such as papermaking, medicine, food additives, etc.
4. Hot topics and content in the past 10 days
The following are hot topics and content related to power plant gypsum powder in the past 10 days:
| date | hot topics | Hot content |
|---|---|---|
| 2023-11-01 | Gypsum powder resource utilization | Power plants in many places promote the comprehensive utilization of gypsum powder to reduce industrial solid waste emissions. |
| 2023-11-03 | Increased environmental protection policies | The new regulations require power plants to improve the quality of gypsum powder and promote the development of green building materials. |
| 2023-11-05 | Gypsum powder market price | Affected by the increase in demand, the price of gypsum powder increased by 5% month-on-month. |
| 2023-11-07 | technological innovation | A company has developed a new gypsum powder dehydration technology to reduce production costs. |
| 2023-11-09 | international cooperation | China signed gypsum powder export agreements with Southeast Asian countries to expand overseas markets. |
5. Summary
As an important industrial by-product, the comprehensive utilization of power plant gypsum powder not only contributes to environmental protection, but also creates economic value. With the advancement of technology and policy support, the application fields of gypsum powder will be further expanded, and the market prospects are broad. In the future, the resource utilization of gypsum powder from power plants will become one of the important directions for industrial green development.
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