How is the classification effect of nickel carbonyl powder?

Nickel carbonyl powder is an important metal powder material, which has been widely used in batteries, defense, aerospace, military, chemical, atomic energy, electronic communication, powder metallurgy, ultra-micro filter, catalyst, stealth materials and high-performance magnetic materials. .
In recent years, with the rapid development of powder metallurgy materials and technologies, the market has higher and higher requirements on the technical properties of carbonyl nickel powder particle size, pine ratio and crystal structure. However, it is very difficult to obtain a single uniform dendritic or spheroidal carbonyl nickel powder by controlling the process conditions and stabilizing the technical parameters in the industrial production process. Some mixed carbonyl nickel powders are often obtained, and the particle size and looseness ratio are wide, which cannot meet the specific industry. User needs.
For three batches of industrial production of carbonyl nickel powder, rotary airflow dynamic classification technology, elbow jet grading technology and improved elbow jet grading technology were selected respectively. By adjusting the control parameters of each equipment, the sample size obtained under different conditions was analyzed and detected. And morphology, studied its impact on the classification effect. The results show that: (1) DXF-10 classifier with rotary airflow dynamic classification technology can classify carbonyl nickel powder according to particle size requirements; adjust center hole diameter, external adjustment ring size, internal adjustment ring size, secondary static pressure Change the classification effect; the reproducibility of the classification effect is better. However, this classifier has a partial damage to the morphology of the nickel carbonyl powder; only one product can be obtained in one classification, and multiple classifiers are required to obtain a single system of three grades. (2) Elbow Jet-15 classifier using elbow jet grading technology can classify carbonyl nickel powder according to particle size requirements; adjust gas supply pressure, F classifier position, M class knife position to change classification effect; Reproducible. This classifier has less damage to the morphology of the nickel carbonyl powder; three products can be obtained in one stage. (3) The BD-3-05 classifier with improved elbow jet grading technology can classify carbonyl nickel powder according to particle size requirements; adjust the gas supply pressure, F classifying knife position, M class knife position to change the classification effect; The effect is reproducible. This classifier has less damage to the morphology of the nickel carbonyl powder; three products can be obtained in one stage. At the same time, the system of the classifier is simple in configuration, and the key wearing parts are easy to replace. The research results provide a reliable technical reference for the large-scale industrialization of carbonyl nickel powder production and have important practical application value.