Petroleum coke powder on the performance requirements of grinding mill
Petroleum coke has a certain degree of crushability, brittleness, the choice of grinding mill requirements coefficient is relatively low, but not all grinding equipment are suitable, such as ball mills. The choice of petroleum coke mill specifically according to the fineness of the finished product yield requirements to determine the ordinary Raymond mill is suitable for finished particle size 35-425 purposes of powder grinding, equipment type can be determined according to the output requirements, in addition to vertical mill, high pressure mill, European version of the mill is also suitable.
In the above conventional mill type European type mill belongs to the advanced grinding machine, finished product specifications, excellent quality, large output, but the relative price is also expensive, the specific user can be based on the actual demand and economic situation to determine the type of equipment. Furthermore, petroleum coke for some chemical production when the fineness of the finished product requirements are extremely high, ordinary mill grinding is relatively laborious, at this time to consider the choice of models should be jumped out of the conventional types, choose the right type of grinding machine, such as petroleum coke powder fineness 1500 mesh on the need to choose the ultra-fine grinding mill grinding, or three-ring medium-speed grinding mill, micronized grinding mill, and so on, and vice versa, ultra-coarse powder also has a corresponding coarse powder grinding mill for its choice, in short, petroleum coke! The key to choosing grinding equipment is to meet the requirements of fineness, output and quality.
Speaking of petroleum coke quality depends partly on the impact of the grinding performance of the mill during processing, and partly on the nature of the raw material itself, which indicators are the key to determine the quality of excellent?
1. Purity: refers to the content of sulfur and ash in petroleum coke. High sulfur coke will lead to gas expansion of products during graphitization, causing cracks in carbon products. High ash will hinder the crystallization of the structure, affecting the performance of carbon products.
2. Crystallinity: refers to the structure of the coke and the size of the small spheres of the intermediate phase. The coke formed by small spheres has a porous structure like sponge, and the coke formed by large spheres has a dense structure like fiber or needle, and its quality is superior to that of sponge coke. In the quality index, the true density roughly represents this performance, and high true density indicates good crystallinity.
3. Thermal shock resistance: It refers to the rupture resistance of coke products when they are subjected to the thermal shock of suddenly rising to high temperature or cooling sharply from high temperature. Needle coke products have good resistance to thermal shock, and thus have a high value of use. The coefficient of thermal expansion represents this property. The lower the coefficient of thermal expansion, the better the resistance to thermal shock.
4. Granularity: reacts to the relative content of powdered coke and lumpy granular coke (available coke) contained in the coke. Most of the powder coke is crushed by extrusion and friction and other mechanical effects in the process of coke removal and storage and transportation, so the amount of size is also an expression of mechanical strength. Raw coke can be prevented from crushing after being calcined to mature coke. Coke with more granular coke and less powdered coke has a higher use value.
The nature of petroleum coke itself can not be changed, but the later processing conditions can be controlled, so in order to ensure the production of high-quality petroleum coke powder, the choice of petroleum coke mill is the key, other supporting equipment is also very important, such as storage devices, transportation equipment, etc., China OCP on petroleum coke milling production line to provide a complete set of design and technical support to maximize the assistance to customers to solve the production problems, to achieve the mutual benefit of both sides! Win-win situation. Welcome to click on customer service to learn more about equipment details, 24 hours online, free consultation.
