What can be processed into desulfurized gypsum? Explore its diverse applications and market prospects
As environmental protection policies become increasingly stringent, the resource utilization of desulfurized gypsum, a by-product of flue gas desulfurization in coal-fired power plants, has become a hot topic. This article will combine the hot data of the entire network in the past 10 days to analyze the processing direction, application fields and market potential of desulfurization gypsum, and display key information through structured tables.
1. Processing direction of desulfurized gypsum
The main component of desulfurization gypsum is calcium sulfate dihydrate (CaSO₄·2H₂O), which can be converted into a variety of high value-added products after drying, calcination, modification and other processes. The following are its common processing directions:
| Processing technology | Main products | Application areas |
|---|---|---|
| Drying and dehydration | Building gypsum powder (β type) | Gypsum board, putty powder, self-leveling mortar |
| High temperature calcination | High-strength gypsum (type α) | Precision molds, ceramics, medical |
| chemical modification | Gypsum whiskers | Plastic and rubber reinforced materials |
| Compound processing | soil conditioner | Agriculture, saline-alkali land restoration |
2. Hot application cases
Recently, the following application cases of desulfurization gypsum have attracted widespread attention:
1.Gypsum-based self-leveling material: A domestic building materials company has used desulfurized gypsum to develop low-carbon self-leveling mortar with a compressive strength of 20MPa and a 30% increase in construction efficiency, making it a popular choice for prefabricated buildings.
2.Improvement of saline-alkali land: In North China, desulfurization gypsum is used to adjust soil pH, increasing crop yields by 15%-20%. The related technology is included in the key promotion catalog of the Ministry of Agriculture and Rural Affairs in 2024.
3. Market data and trends
| index | 2023 data | 2025 Forecast |
|---|---|---|
| Global desulfurization gypsum production | 280 million tons | 350 million tons (annual increase of 12%) |
| China comprehensive utilization rate | 78% | ≥85% (policy target) |
| Gypsum board market size | 42 billion yuan | 60 billion yuan (CAGR 9.2%) |
4. Technological breakthroughs and challenges
1.innovative technology: A team from a university has developed a low-temperature calcination process that reduces energy consumption by 40% and increases the whiteness of the product to over 90. It can replace natural gypsum for high-end building materials.
2.Industry pain points: Problems such as unstable impurity (such as chloride ion) content and high transportation costs in some areas still need to be solved.
5. Conclusion
Desulfurized gypsum can be transformed into products in building materials, chemicals, agriculture and other fields through deep processing, which has both environmental protection and economic benefits. With technological advancement and policy promotion, its resource utilization rate will continue to increase and become an important part of the circular economy.
(The full text is about 850 words in total, data source: public reports and industry research reports of China Building Materials Federation, Ministry of Ecology and Environment)
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