We understand the importance of high-quality calcium carbide for our customers' production processes. As a global supplier of calcium carbide, KEDE Chemical implements strict quality control measures at every stage of production to ensure both the quality and stability of our products. Here are the key quality control measures we apply during the calcium carbide production process:
- Raw Material Selection: Ensuring Quality Raw Materials Our quality of calcium carbide starts with the raw materials. We place great emphasis on the raw material selection process. First, we rigorously screen suppliers to ensure the raw materials meet quality standards and request certificates of analysis to verify the reliability and stability of the materials. Upon receiving the materials, we also conduct visual inspections to ensure they are free from impurities, ensuring only qualified materials enter the production process.
- Crushing: A Stable and Uniform Crushing Process Our crushing process is critical to the final quality of calcium carbide. We use advanced crushing equipment to ensure that the raw materials are crushed evenly and stably, with the particle size meeting production requirements, ensuring that only qualified material is passed to the subsequent screening process.
- Screening: Multi-Screen Combination to Ensure Correct Particle Size Distribution Screening is a key step in determining the particle size distribution of calcium carbide. We use a multi-screen combination system to ensure the particle size compliance rate is ≥ 90%. We provide complete particle size specifications including 4-7MM, 7-15MM, 15-25MM, 25-50MM, 50-80MM and 80-120MM, fully catering to steel desulfurization, acetylene welding and acetylene production needs.
- Iron Removal: Eliminating Iron Impurities Iron impurities can affect the quality of calcium carbide, especially in steel production, where they may interfere with the reaction. We have installed specialized iron removal equipment on our production lines, which efficiently eliminates iron impurities from the calcium carbide, ensuring the purity of the final product and meeting our customers' stringent requirements.
- Fully Enclosed Conveyor System: Reducing Dust Emission and Weathering To improve the cleanliness of the production environment and the quality of the product, we use a fully enclosed conveyor system. This reduces dust emission and keeps the production environment clean. The enclosed conveyor also reduces the exposure of calcium carbide to the air, slowing down the weathering process and ensuring stable gas release.
- Automated Filling Machine: Reducing Dust Emission and Improving Filling Precision In the filling process, we use automated filling machines to reduce dust emission and improve production efficiency. The automated equipment ensures even distribution of each batch of calcium carbide, minimizing errors introduced by manual operations and guaranteeing consistent batch quality.
- Weight Control: High-Precision Weighing System We use Siemens high-precision weighing systems to ensure that the weight error of each drum of calcium carbide remains within ±0.2KG, avoiding the impact of weighing errors on product quality and ensuring consistency in the final product. We support 50KG and 100KG standard drum packaging with accurate net weight.
- Packaging Control: Strict Inspection of Every Detail Packaging is a critical step in the calcium carbide production process. We thoroughly inspect each empty drum to ensure there is no damage or deformation, and check the labels and markings for accuracy. The automated capping machine enhances the sealing of the drums, ensuring that the product is protected from external environmental influences during transport and storage.
- Nitrogen Filling: Reducing Exposure to Air and Slowing Weathering Nitrogen filling is a key quality control measure during packaging. By filling each drum with nitrogen, we eliminate the air inside, effectively reducing the exposure of calcium carbide to the air and slowing down the weathering process. This treatment greatly improves storage stability and guarantees stable gas yield during long-distance global transportation.
Conclusion
Through these strict quality control measures, KEDE Chemical ensures the high quality and stability of every batch of calcium carbide. We insist on standardized production and refined management to supply high-performance calcium carbide for global customers, widely applied in acetylene gas production, welding cutting and steel desulfurization. Quality is our core advantage, and we will continuously optimize production technology to deliver stable and cost-effective products and create long-term value for clients.