Interference、transition and clearance ,Do you really understand?

Three basic mating relationships in mechanical design: interference fit, transition fit, and clearance fit. Many people consider the interference fit in the product design only when they are tighter. interference fit, transition fit, and clearance fit. interference fit should notice: 1. When the interference fit shaft hole, must have a guiding function, that is, must…

Carbon and Oxygen Usage in the EAF — Is More Always Better?

Post-combustion of carbon in electric furnaces: CO into CO2 in an electric arc furnace, Post-combustion is the complete combustion carbon. improve energy utilization efficiency and reduce electrical energy consumption ways.considered is one. The complete combustion requirement in the furnace is because 2CO + O2 → CO2 reaction releases 6.25kWh / (Nm3O2),2C + O2 → CO means…

Development characteristics of the global refractory industry

The development of the global refractory industry has the following characteristics: Through mergers and acquisitions, reorganization, and elimination of backwardness, the concentration of refractory industrial production has been increased. Merges, mergers, reorganizations, and natural elimination in the operation of the market economy since the 1990s in developed countries have increased the concentration of production, such…

Test of waste magnesia carbon brick becomes hot repair material for converter

Magnesia-carbon brick test Raw material The main raw materials used in the test are waste magnesia-carbon brick particles (5~3, 3 ~1, and≤1mm), MS95 sintered magnesia fine powder (≤0.074mm), and modified asphalt (≤0.15mm, softening point 112.5 ℃, Coking value 58.2%) is the binder , Ⅰanthracene oil (density 1.04 ~ 1.15g · cm-3, coking value 0.56%) is…

Forecast of China’s graphite electrode exit situation in2020

According to data from Chinese customs on graphite electrode for exit: China ‘s  graphite electrode exits in November 2019 were 22,600 tons, a decrease of 10.32% month-on-month, and graphite electrode exits in November were 94.516 million dollars, a month-on-month decrease of 19.88%. In July 2019, after the exit volume of graphite electrodes in China reached a historic peak, a wave of oscillating downward trend appeared in the following months. A simple analysis has the following reasons: The price of graphite electrodes in China has fallen rapidly, and overseas markets have increased their wait and see; The inventory of ports in the Middle East is severely overstocked, and demand has slowed in the short term; Market news impact: For example, in September, China’s exit of dual-use items and technology import and exit licenses to Iran through…