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Product Overview
High Activity Calcium Oxide (CaO), commonly known as quicklime, is a core high-temperature desulfurization purifier and process stabilizer in the carbon black industry. This product is refined from high-purity limestone through intelligent rotary kiln calcination, with effective CaO ≥90% and activity ≥360mL. It is specially designed for deep desulfurization, quality improvement and environmental compliance in furnace process carbon black and thermal cracking carbon black production.
1. Ultra-High Activity · Rapid Desulfurization (Core Value)
Activity ≥360mL (4mol/L HCl, 40℃/10min)
Reaction speed is more than 50% faster than ordinary calcium oxide
Instantly captures H₂S/SO₂ at high temperatures and converts gaseous sulfur into solid CaS, with desulfurization rate ≥95%
Eliminates sulfur residue, directly reduces sulfur content in carbon black, and significantly improves blackness, purity and dispersibility
2. High Purity ≥90% · Low Impurities · Low Ash Content
Effective CaO ≥90.0% (far exceeding national standard Class I chemical grade)
MgO ≤1.5%, SiO₂ ≤2.0%, Fe₂O₃+Al₂O₃ ≤1.0%
HCl insoluble matter ≤2.5%
Extremely low impurities, no increase in carbon black ash, no effect on hue, no equipment clogging
3. Ultra-Fine Powder · Easy Dispersion · Compatible with All Working Conditions
Ultra-fine powder: 200 mesh / 325 mesh
Complete reaction, no agglomeration, no residual slag
Can be directly sprayed into reaction furnace, quench section or tail gas system for convenient use
4. Environmental Protection & Cost Reduction · Stable Production
Neutralizes acidic tail gas, reduces equipment corrosion and extends service life
Reduces flue gas treatment load and makes environmental compliance easier
Unit consumption is more than 30% less than ordinary lime
Stabilizes production process, reduces fluctuation and improves carbon black yield
| Item | Index | Testing Method |
| Effective Calcium Oxide (CaO) | ≥90.0% | HG/T 4205-2024 |
| Activity | ≥360mL | Hydrochloric acid titration |
| Magnesium Oxide (MgO) | ≤1.5% | Atomic absorption spectrometry |
| Silicon Dioxide (SiO₂) | ≤2.0% | Gravimetric method |
| Fe₂O₃ + Al₂O₃ | ≤1.0% | Spectrophotometry |
| Sulfur (S) | ≤0.02% | High-temperature combustion method |
| HCl Insoluble Matter | ≤2.5% | Acid dissolution gravimetric method |
| Fineness | 325 mesh (95% pass) | Sieve analysis |
| Moisture | ≤0.5% | Drying method |
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Certifications
Our Advantages
We have our own mine in Hubei Province, which endows us with the following advantages:
Stable Raw Material Supply: Owning our own mine ensures a stable supply of raw materials for calcified substances. This helps to avoid production interruptions caused by issues such as fluctuations in the raw material market and supply shortages. It guarantees the smooth progress of production plans and maintains a stable product output, enabling us to better meet customer needs and enhance customer satisfaction.
Controllable Raw Material Quality: Our company can directly manage and monitor the mining process of the mine, and strictly control the quality of raw materials. We are able to select appropriate ore grades and qualities according to production requirements, ensuring that the mined ore meets the high standards of our products. This provides a solid foundation for producing high-quality calcified substance products and helps to enhance the market competitiveness of our products.
Cost Advantage: Obtaining raw materials from our own mine reduces intermediate procurement links and lowers procurement costs. Moreover, in the long run, a stable raw material supply also enables our company to take the initiative in cost control and avoid the risk of cost increases due to fluctuations in raw material prices, thereby improving the company's economic benefits and profitability.
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FAQ
Q: Are you a trading company or a factory?
A: We are a factory.
Q: What are your main products?
A: Calcium oxide, Calcium hydroxide, Light calcium carbonate, Heavy calcium carbonate，Nano calcium carbonate
Q: How do you control quality?
A: Our factory is equipped with professional technicians to control the quality, and the inspectors conduct a sample test every 2 hours to ensure the quality of our production. We also accept BV, SGS or any other third party inspection.
Q: Do you provide free samples?
A: Yes.
Q: Do you have any certifications?
A: Yes, we have ISO9001 and SGS. Meanwhile, we can provide MSDS, marine transportation identification reports, etc.
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.
