The production process of pre-baked anode

 1. Raw materials. The pre-baked anode adopts low-ash raw materials. Petroleum coke and residual electrode are used as aggregates. The impurity content is generally not more than 0.5%. The binder is coal tar pitch. Pre-baked anode production has widely used modified pitch or high-temperature pitch as a binder.

2. Calcination. Use rotary kiln or tank calciner at 1250. The petroleum coke is calcined at a high temperature of about C.

3. Crushing and screening. The forged petroleum coke and residual pole are crushed, sieved and ground into different strength materials according to the requirements of the formula, and then put into their respective silos.

4. Ingredients. The ingredients are set by the formula I set. There are two types of pre-baked anode formulas: large particle formula and small particle formula. The maximum particle size of the aggregate is 12mm~15mm. The amount of coal tar pitch varies according to the dry material formula and molding process. Generally, It is 16%~18%.

5. Kneading. A batch-type horizontal double-shaft kneader or a continuous kneader is used to mix and knead the aggregate and the binder to produce a plastic paste.

6. Forming. A special vibration forming unit is used to make the paste into a pre-baked anode green body under high-frequency vibration.

7. Roasting. The roasting heat treatment of the pre-baked anode mostly uses an open ring roasting furnace. The roasting cycle is about 20 days.

8. Cleaning and processing. After roasting, the pre-baked anode carbon block is slightly cleaned, and it can be delivered after passing the inspection.

Comments

Post a Comment

Popular posts from this blog

Study on impurities in high purity flake graphite

Image
 　　For the analysis of trace impurities in high-purity flake graphite, the sample is usually pre ashed or wet digested to remove carbon, the ash is dissolved with acid, and then the impurity content in the solution is determined. The ashing method does not need to use ultra pure acid to dissolve the ash, thus avoiding the risk of introducing the elements to be measured, so it is used more. It is also very difficult to detect the ash content of high-purity flake graphite, because the enriched ash needs to be burned at high temperature, and it is difficult to separate the ash from the sample boat at high temperature, which makes it impossible to accurately determine the composition and content of impurities. 　　The existing methods all take advantage of the characteristic that the platinum crucible does not react with acid, use the platinum crucible to burn the high-purity flake graphite to enrich ash, and then directly heat the sample in the crucible with acid to dissolve th
Read more

General technical index requirements for electrode paste

Image
 Electrode occupies an important position in submerged arc furnace. The working conditions of the electrode are bad, the current passing through is high, the temperature difference between the two ends is large, and the production is affected by the impact of mechanical, electrical and charge collapse... Mechanical strength, higher electrical resistivity, better thermal shock resistance, oxidation resistance and smaller thermal expansion coefficient. Generally speaking, the quality of electrode paste is controlled by the following five indicators: 1. Ash: Ash is the residue of electrode paste when it is burnt to constant weight at 850℃-870℃. It belongs to inorganic minerals. It has high ash resistivity, poor strength, high power consumption, and large electrode consumption. In the event of a hard breaking accident, the ash content is a very important indicator, and the lower the better. 2. Volatile matter: Volatile matter refers to the mass loss of electrode paste under the condition o
Read more

Performance characteristics of anthracite electrode paste

 Anthracite is the main raw material of electrode paste. The performance of anthracite is related to the performance of electrode paste. Therefore, it is necessary to understand and discuss the performance of anthracite to ensure the quality of electrode paste. Anthracite coal in China is mainly distributed in Shanxi, Ningxia and Guizhou. Shanxi is the origin of anthracite, which is mainly produced in Yangquan and Jincheng. Anthracite is an indispensable raw material for carbon industry. It is mainly used in semi graphite cathode carbon block, electric furnace carbon block, blast furnace carbon block, carbon electrode and various pastes. Studying and discussing various properties of anthracite is very beneficial to improve the quality of carbon products.
Read more