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Calcium hydroxide is a white powdery inorganic compound with the chemical formula Ca(OH)₂. It has strong alkalinity and can partially dissociate into hydroxide ions (OH⁻) in water, which is the core basis for its application in wastewater desulfurization. Compared with desulfurizers such as sodium hydroxide and sodium carbonate, calcium hydroxide has significant advantages in wastewater desulfurization and has become the preferred solution for industrial enterprises.
| Test Items | Standard | Measured Value | Result |
|---|---|---|---|
| Ca(OH)₂ | ≥96% | 96.85% | pass |
| SiO₂ | ≤0.1% | 0.08% | pass |
| CaCO₃ | ≤3% | 0.18% | pass |
| Al₂O₃ | ≤0.1% | 0.08% | pass |
| Fe₂O₃ | ≤0.05% | 0.03% | pass |
| MgO | ≤0.53% | 0.35% | pass |
| H₂O | ≤0.8% | 0.12% | pass |
| Acid Insoluble | ≤1% | 0.68% | pass |
| Loss on ignition | ≤0.5% | 0.21% | pass |
| Bulk density | 0.4 - 0.5 g/ml | 0.48 | pass |
| PH | - | 12 | pass |
| Fineness200Mesh | 100% | 100 | pass |
| Fineness300Mesh | ≥96% | 96.17 | pass |
| Appearance | - | white powder | - |
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The core of calcium hydroxide used in wastewater desulfurization is to use its alkaline characteristics to undergo neutralization reactions and redox reactions with acidic sulfides in wastewater, convert soluble sulfides into insoluble precipitates, and then remove them through separation processes to achieve wastewater purification. According to the different forms of sulfides in wastewater, the reaction mechanism is mainly divided into the following two types, covering most industrial sulfur-containing wastewater scenarios.
Second, for alkaline sulfur-containing wastewater containing hydrogen sulfide (H₂S), acid-base neutralization and redox reactions mainly occur. H₂S dissociates into hydrogen ions and sulfide ions in water. The hydroxide ions provided by calcium hydroxide neutralize the hydrogen ions and react with the sulfide ions to form calcium sulfide (CaS) precipitates; if the wastewater is in an aerobic environment, part of the calcium sulfide will be oxidized to calcium sulfate, further reducing the sulfur content in the wastewater. The reaction equations are as follows:
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Our Advantages
We have our own mine in Hubei Province, which endows us with the following advantages:
We have our own mine in Hubei. This mine has high purity, few impurities and low magnesium content. This advantage has brought about the optimization and upgrading of products for many chemical manufacturers.
We control the raw materials from the source, and the calcium products we produce are not only of high quality, but also have stable supply. Our products have been applied by many well-known chemical enterprises at home and abroad.
Our products are not only widely used in industry, but also extensively applied in environmental protection, such as flue gas desulfurization and wastewater treatment.
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FAQ
Q: Are you a trading company or a factory?
A: We are a factory.We have two factories and a limestone mine.
Q: What are your main products?
A: Calcium oxide, Calcium hydroxide, Light calcium carbonate, Heavy calcium carbonate and Nano calcium carbonate.
Q: What payment methods are supported?
A: T/T、L/C、D/P.
Q: Where is your factory?
A: One factory is located in Changshu, Jiangsu Province, and the other factory is in Jingmen, Hubei Province, welcome to visit us at any time.
Q: Do you provide free samples?
A: Yes.
Q: How do I contact you to purchase a product?
A: Below is our contact information, please feel free to contact us at any time.
