Our company is a cement enterprise with an annual production capacity of 1.8 million tons, and we operate a new dry cement production line with a daily output of 2,500 tons. The slag content in the cement grinding process is approximately 20%, which has significantly hindered both production efficiency and product quality. To address this issue, we decided to implement technical upgrades using advanced technologies, innovative processes, and modern equipment, particularly focusing on improving our drying system.
After comparing rotary and vertical dryers, we found that vertical dryers offer several advantages: lower investment costs, reduced energy consumption, higher output, and a smaller footprint. These features make them an ideal replacement for traditional rotary dryers, especially in situations where space is limited. Given our site constraints, we opted to install a vertical dryer to effectively dry the slag.
Since April 2005, we conducted extensive evaluations of nearly 10 vertical dryer manufacturers and their users. Among all the options, the KBH series vertical dryers and KBF series high-temperature boiling furnaces from Jiangsu Yancheng Kebao Building Materials Environmental Protection Equipment Co., Ltd. stood out. The company has a strong reputation as a high-tech enterprise in Jiangsu Province, with five patented high-efficiency products, including the KBH series. Their products are widely used by hundreds of customers, and they have a large team of experienced engineers and technicians, including a national technology model in the building materials industry.
We also visited some of their clients, such as Shanghai Haishu Building Materials Co., Ltd., and were impressed with the performance of the KBH vertical dryers and KBF boilers, as well as the excellent after-sales service provided. Based on these findings, we signed a supply and service contract with Cobb for the KBH2O24 vertical dryer and the KBF6A high-temperature boiling furnace.
Within one week of signing the contract, Cobb provided a detailed design plan, a process foundation map, and basic construction drawings, and the project quickly moved into the construction phase. The installation was completed in early October, but due to other production-related factors, commissioning didn’t begin until late November. After just one week of trial operation, the dryer achieved an output of over 30 tons per hour, with coal consumption below 12 kg per ton—fully meeting our expectations.
Throughout the installation and commissioning process, the professionalism and dedication of Cobb’s technical team left a strong impression on us. From the initial setup to final testing, their staff worked closely with ours, without taking any days off. They demonstrated deep expertise in drying technology and were patient and thorough in explaining technical details. Every part of the system, from the dryer to the boiling furnace, was carefully checked and rechecked, which made us feel truly confident in their capabilities.
Thanks to the implementation of the KBH vertical dryers and KBF high-temperature boiling furnaces from Cobb, we successfully resolved the long-standing issue of moisture in cement raw materials. This technological upgrade has significantly boosted our productivity and profitability, and it has allowed us to experience firsthand the value of high-quality, high-tech solutions.
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