Hot rolled sections are characterized by large production scale, high efficiency, low energy consumption and low cost. Rolling sections uaually applies the following methods: Ordinary rolling method The 2-hi or 3-hi mill produces steel section, its pass pattern is made of the groove of the two rollers, can produce simple, shaped and longitudinal rolling cycle section section steel.…
World crude stainless steel production is 55.255 million tonnes in 2022, down 5.2 percent from a year earlier, according to data released by the World Stainless Association on April 3. In 2022, the output of stainless steel in Europe was 6.294 million tons, down 12.4% year on year; U.S. production…
Tundish is an important equipment for continuous casting process, its refractory lining mainly includes heat insulation layer, permanent layer and working layer. (1) The main function of the insulation layer is thermal insulation, usually with asbestos board insulation bricks or light castables, aluminium silicate fibre mats, and nano-microporous insulation boards plus…
The geometrical characteristics of the octagonal billet lie between those of a square cross section and a round cross section, with the respective advantages of a square billet and a round billet, the billet leaving the mould has excellent structural rigidity and can significantly restrain the bulging deformation of the shell. Because of…
Foreign scholars and enterprises have done a lot of research on the application of biomass in electric arc furnace steelmaking sector, the main research direction is to use biomass as carburizing agent and blowing agent in EAF smelting process. Based on the current research, it can be found that there are two…
Brushed motors are mechanically commutated, the magnetic poles do not move and the coils rotate. When the motor is in operation, the coil and commutator rotate, the magnets and carbon brushes do not. The alternating change in the direction of the coil current is done by the commutator and brushes…
The beam jet lance is similar to a laser beam and can maintain its initial axial velocity over a longer distance, resulting in smaller expansion and decay of the central supersonic jet, longer blowing distance and increased penetration depth and stirring strength of the oxygen jet into the molten pool.…
The main reasons for the poor circle formation of wire out of the laying head are as follows. (1) Too much tension between mills (2) There is a deviation on water-cooled section alignment, nozzle conduit is worn to cause the unstable operation of the mill. (3) Roll ring of pinch roller is worn badly. Inappropriate clamping force of the…
The entrapped slag is one of the main defects on the surface of ultra-low carbon steel hot-rolled coil, the overall macroscopic morphology of the defect is black color or black – white strip, and there is obvious difference with the base sheet, intermittent distribution along the rolling direction, the length varies, often accompanied by warping…
On 25 February 2023, the China Iron and Steel Industry Association (CISA) issued 15 group standards, including “Technical Requirements for Intelligent Factory Central Control in the Iron and Steel Industry”, covering areas such as intelligent manufacturing in the iron and steel industry, steel plates, refractory materials, “leader” evaluation requirements, etc.…
