In operation, continuous casting ladle will appear slag adhesion or tumor phenomenon, resulting in a reduction in the effective volume. As the slag is very hard, it tends to intermingle with cold steel, which makes ladle unpacking very difficult and increases the number of ladle unpacker damages and repairs. With the…
Seven common material testing methods in steel material labs, composition, spectra, mass spectra, energy spectra, morphology, physical structure, and thermogravimetry. 1.Composition analysis Composition analysis can be divided into two types according to the analysis object and requirements: micro sample analysis and trace component analysis. 2.Spectral analysis 1) Atomic Absorption Spectrometry…
(1) Higher descaling pressure Increasing the descaling pressure can improve the descaling effect, now the descaling pressure can reach 18-22MPa, or even higher. (2) High pressure and high flow rate descaling pumps At the beginning of high-pressure water descaling, piston pumps were used, with low pump pressure, small flow rate…
Heavy shock load If the shock load of the fixed-size machine is too large, it may choose a frequency conversion motor for greatly reducing the impact load, adjusting the speed of the rollers through the frequency converter, and can control speed and stopping with a grating detection installed on both…
Rank Country 2022 2021 YoY Milion Tons Million Tons % 1 China 1013.0 1034.7 -2.1 2 India 124.7 118.2 5.5 3 Japan 89.2 96.3 -7.4 4 United States 80.7 85.8 -5.9 5 Russia(e) 71.5 77.0 -7.2 6 South Korea 65.9 70.4 -6.5 7 Germany 36.8 40.2 -8.4 8 Turkey 35.1…
According to the latest research released by the Metallurgical Industry Planning and Research Institute, it is estimated that China’s steel consumption in 2022 will be 920 million tons, down 3.1% year on year; It is predicted that the demand for steel in 2023 will be 910 million tons, down 1.1%…
7.Low-temperature finishing rolling technology of rebar multi-splitting Bar multi-cutting low-temperature finishing technology in actual production will come with some troubles, like as the head deformation of the rolled parts; multi-line cutting water cooling temperature control is not uniform and others. In 2022, Metallurgical Jingcheng Engineering Technology Co., Ltd. and Beijing…
1.Coke oven gas reduction technology is becoming mature Coke oven gas is a hydrogen-rich high-quality resource with 55%-60% hydrogen content and about 25% methane content. In December 2022, the 600,000 tons/year scale hydrogen metallurgy demonstration project of HISCO Group Zhang Xuan Technology with coke oven gas as reducing gas was…
Events Reasons Solutions 1 Rolled parts not bitten into the rolls and steels stacked The end part of a billet is forked To pick out unqualified billet The guide isn’t installed properly To Reinstall the guide The rolling piece in the guide orgroove is blocked To remove away obstructive Not polish new groove after replacenew groove. To polish new groove andregulate the rolling speed 2 Steels piled after the rolling piece have been bitten into the rolls The speed of rolling piece isn’t right. Correctly setting the speed Roll diameter input error To input the correct rolldiameter Tension setting is too small afterchanging rolls and grooves Increase the tension settingappropriately Incomplete grinding after changingnew groove Further grinding of the rolls 3 Steel stackeddue to steel jamming between rolls Motor overload,overspeed,and dropout Check steel temperature,roll size,rolling speed and electrical faults 4 Flying shear 1#,2#steel stacking Flying shear overrun speed is toolow Increase the overrun speedof flying shear Flying shear does not cut the head Check power supply,hotmetal detector Shear blade aging or poor overlap Replace shear blade,adjustoverlap Interrupt flying shear action Checking hot metaldetectors…
The rolling line of each stand should align in the same straight line so that is the production can normally work. If there is light offset of stand rolling line, the guide could be damage caused by uneven wear of the hole pattern; serious offset can directly cause the accident of steel stacking. The meaning…
