-
How does the “negative pressure control” of the tank furnace affect the temperature stability of the calcination zone？
The negative pressure control in a pot furnace directly influences the temperature stability of the calcining zone and the burnout rate of volatile matter by regulating the flow states of air and volatile matter. Specifically, excessive negative pressure leads to a decrease in temperature and a d...Read more -
What irreversible defects will occur in the subsequent graphitization process due to “under-burning” calcination?
“Under-burnt” calcined coke, due to insufficient calcination of the raw material, will lead to internal structural defects during subsequent graphitization, which in turn trigger irreversible defects such as cracks, uneven density, abnormal volume shrinkage, and performance degradatio...Read more -
What is the microscopic mechanism of the decrease in true density caused by “overburning” during calcination?
During the calcination process, the microscopic mechanism by which “overburning” leads to a decrease in true density is primarily related to grain boundary oxidation or melting, abnormal grain growth, and structural damage, as analyzed in detail below: Grain boundary oxidation or mel...Read more -
Across mountains and seas, let’s discuss cooperation – We warmly welcome the Indian client delegation to visit our company for a tour and exchange
Recently, with great enthusiasm and high expectations, we welcomed a distinguished client delegation from India. This visit was not only an opportunity for business communication but also a journey of cross-border friendship. Our company attached great importance to the visit of the Indian client...Read more -
How to optimize the ratio of combustion air for the secondary combustion of volatile matter in the calcining furnace to achieve self-heating balance?
In a can-type calciner, optimizing the air ratio for the secondary combustion of volatile matter to achieve self-heat balance requires comprehensive adjustments from five aspects: precise calculation of air volume, stratified air distribution control, adjustment of excess air coefficient, managem...Read more -
What is the specific impact of a ±20℃ temperature fluctuation in the calcination zone of a rotary kiln on the true density of the product?
While it’s not possible to directly provide the specific impact value of a ±20℃ temperature fluctuation in the calcining zone of a rotary kiln on the true density of the product, it is clear that such temperature fluctuations can significantly affect the true density of the product. The det...Read more -
What is the maximum allowable limit for sulfur entering the kiln to ensure the quality of the anode?
Mixing Ratio Principles for Petroleum Coke with Varying Sulfur Contents: What is the Maximum Allowable Sulfur Limit for Kiln Feed to Ensure Anode Quality?** In the production of aluminum prebaked anodes, the maximum allowable sulfur limit for kiln feed is typically 3.0% to ensure anode quality. T...Read more -
What are the migration and volatilization rules of trace elements in petroleum coke during the calcination process?
The migration and volatilization patterns of trace elements such as sodium (Na), vanadium (V), nickel (Ni), and calcium (Ca) in petroleum coke during calcination are jointly influenced by temperature, occurrence forms, and chemical reactions. The specific patterns are as follows: 1. Migration and...Read more -
How does the particle size distribution of raw coke quantitatively affect the permeability of the material layer and the uniformity of calcination in the rotary kiln?
The quantitative impacts of the particle size distribution of raw material coke on the permeability of the material layer and the uniformity of calcination in a rotary kiln can be analyzed through the correlation between particle size parameters and process indicators as follows: I. Quantitative ...Read more -
High-volatile petroleum coke is prone to “cracking” or “slagging” during calcination
Mechanism Analysis: Explosion (Bursting) Phenomenon: Rapid escape of volatile matter: When the volatile content in petroleum coke is high, as the temperature rises during the initial stage of calcination, the volatile matter escapes rapidly. If the escape rate is too fast, significant steam pres...Read more -
Does the moisture in the raw coke need to be forcibly dried before calcination?
Generally, it is necessary to forcibly dry the moisture in raw coke before calcination, especially in the following scenarios where drying is an essential process: I. Negative Impacts of Moisture on the Calcination Process 1. Affecting the Efficiency of Volatile Matter Discharge When raw coke (su...Read more -
What influence does the microstructure of petroleum coke (needle-like, spongy, and pellet-like) have on the calcination shrinkage rate and true density?
1. Needle Coke: A Typical Example of Low Shrinkage and High True Density Structural Characteristics: Needle coke exhibits a fibrous or elongated structure with elongated elliptical pores arranged in an ordered manner. This structure demonstrates excellent densification capability during c...Read more
