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Titanium dioxide is a kind of white pigment with good performance, and it is also a main raw material commonly used in pigment and coating industry. In addition, titanium dioxide is also widely used in plastic, ink, paper and other industries. In the actual production and application, different industries will choose different properties and different quality titanium dioxide raw materials according to the use of products, but the particle size of titanium dioxide is fine and has strong abrasiveness. If pneumatic conveying is used for transmission, it is necessary to carefully select the design and type selection, otherwise it is very easy to remove the problem.
Titanium dioxide has good gas retention, poor air permeability, and can present fluid properties after aeration, so it is very suitable for dense phase sand dune flow pneumatic conveying.
Because it is used as pigment and coating raw materials, the general users have higher requirements on the whiteness of titanium dioxide, which requires that in the process of pneumatic conveying, there should be no impurities added, causing pollution to titanium dioxide, so it is necessary to purify the pneumatic conveying gas source; the compressed gas through the equipment and pipeline needs stainless steel material, or polymer material pipeline, to avoid impurities Because of its strong wear resistance, low-speed pneumatic conveying mode is generally used, and the speed is controlled below 5 meters, which can reduce the occurrence of wear.
For titanium dioxide pneumatic conveying pipeline, the number of elbows should be reduced as much as possible. Large radius elbows should be used to reduce the pressure loss of pipeline. Ceramic elbows can also be used to reduce the wear of materials on pipeline.
Due to the large proportion of titanium dioxide accumulation, measures should be taken during the transportation process to avoid titanium dioxide accumulation at the bottom of the transportation pipeline, resulting in blockage; the pipeline and equipment for storing and transporting titanium dioxide materials need stainless steel material, internal polishing or lining with high molecular material to reduce the friction coefficient and prevent bridging and blockage; the most important thing is the resistance of titanium dioxide transportation The coefficient is higher than that of ordinary materials, which will lead to agglomeration and overpressure during transportation. Therefore, the prediction of pressure loss should have rich experience and test basis.
The pneumatic conveying of titanium dioxide is relatively simple in theory, and it is difficult to grasp the actual process. According to the particle size, properties and other parameters of titanium dioxide, we need to use proprietary software and experimental test data to calculate the pneumatic conveying, and adjust it according to practical experience, which requires technicians to have a solid theoretical foundation and rich practical experience.
Nanjing Xiangrui has more than 40 years of research and engineering experience in pneumatic conveying system. The technology is in a high position in the bulk material conveying industry in the world, and can provide a good design scheme for the pneumatic conveying of titanium dioxide.