Coal asphalt manufacturer Gao Xiao
Coal pitch is a by-product obtained after distillation of coal tar, it has high chemical stability and good thermal stability, and is widely used in metallurgy, building materials, chemical industry and other fields. Coal pitch also plays an important role in the production of prebaked anodes.
Prebaked anode is a carbon product, which is made of stone tar and asphalt coke as aggregate and coal pitch as binder, and is used as an anode material in a prebaked aluminum electrolytic cell. The production of prebaked anode has the characteristics of "heavy material and light industry", its production process is to use petroleum coke, a by-product of oil refining, as aggregate, accounting for more than 80% of the total weight of the prebaked anode, and then use the by-product coal asphalt of the coking plant as a binder to manufacture the prebaked anode, and the cost of petroleum coke and coal pitch accounts for about 75% of the production cost of the prebaked anode.
Coal asphalt is an important binder for the production of aluminum prebaked anode products, and its quality affects the indicators of the products, which is embodied in the prebaked anode kneading process, which requires good wettability and strong bonding ability to ensure that the paste has good plasticity. In the high-temperature softening temperature stage, the wettability and fluidity of the coal pitch are the most important, which largely determines the quality of the coal pitch required for the paste.
Coal pitch has a variety of functions in the production of prebaked anodes, including improving the quality of prebaked anodes, enhancing strength, improving electrical conductivity, improving thermal stability, reducing production costs and improving oxidation resistance, which makes coal pitch one of the important additives in the production of prebaked anodes.
It should be noted that when using coal asphalt, the amount and quality of coal pitch should be strictly controlled to avoid excessive use or inferior products that will have an adverse effect on the performance of the prebaked anode. At the same time, for different types and qualities of coal pitch, reasonable selection and matching should be carried out according to its characteristics to give full play to its role in the prebaked anode.