Design Scheme
Raw Material: Pottery clay and pyrophyllite
Input Size: 10-30mm
Output Size: 100 meshes
Equipment: Two MTM130 mills
Capacity: 3-5TPH
Project Profile
In June, 2016, a customer chose to cooperate with SBM to build a clay grinding production line to produce ceramic plates. We finished the preparation of equipment within a month and the installation and commissioning within 15 days. The high efficiency made the customer choose us again on his second production line for ceramic board production.
Technological Analysis
The grinding technologies for ceramic production include two kinds --- production by dry-process and by wet-process. The latter is common.
Wet-process Production Line
Ball mill + drier: The raw material is sent to the ball mill and ground to be slurry by adding 30-40% water. Then the slurry is dried by drying tower with water content controlled at 7%. But this method features long drying time and low yielding.
Dry-process Production Line
Vertical mill (or T-typed mill)＋pelletizer：The material is sent to the mill directly. And then the pelletizer works to add moisture of material. After that, the fluidized bed dries the powder and the water content would be controlled at 7%. Finally, the technology of grinding by pressure is taken. But this method features short drying time and high yielding.
Compared to the wet-process production, the dry-process production can save thermal energy consumption by 80% and electricity consumption by 35% and reduce emission by over 80%. Meanwhile, additives including the water reducing agent and ball stone can be saved a lot. Besides, the wet-process production isn’t beneficial to the environment. The pressure from environment protection would speed up its pace of elimination. In this project, dry-process production designed by SBM was taken.
Advantages of Project
1. The dry-process production replaced the two links of energy consumption--- producing slurry through ball mill and pelleting by spraying which are used in wet-process production. The dry-process production boasts energy saving and emission reduction. It will be taken priority to for the sound development of ceramic industry.
2. Abide by the principle of maximizing the customer’s profits. SBM replaced the vertical mill by MTW European Mill, which reduces the investment costs.
3. Because of the heavy silica content in raw material, the machine is easily exposed to the abrasion. So in view of the differences of material, we made special design when manufacturing the equipment.
4. Since the customer lacks experience on operation of mill, our employees would rush to the production line to help our customer if there was any problem about operation. The quick response to customer’s problems is the key wining the second cooperation with the customer.
Conclusion
The dry-process production is a kind of new technology. Currently, when building the ceramic board production line, some customer would import the mill at the time of purchasing pelletizer. However, actually, the domestic grinding equipment can absolutely meet the same demands. And compared to the foreign equipment, it is much cheaper and can increase alternatives for investment on future ceramic industry.
