The flow of molten steel in the mould tubes has a great influence on the quality of the mold. The unreasonable flow of molten steel in the mold will lead to many defects in the slab, such as bubbles and inclusions in the slab, entrainment of mold slag, surface defects, and leakage. Therefore, studying the…
Every link of quality control is in place – implement perfectionismThis is our slide gate plate for American customers,.To avoid distortion and cracks caused by firing process, we set up each slide gate plate with its own room. LMM people love products all the time and implement perfectionism.
Abstract: Magnesia-carbon brick is a kind of composite refractory material. It is a carbon-bonded alkaline brick prepared with magnesia, carbon source, organic binder and admixture, and is made by mixing, high-pressure molding and low-temperature treatment. It is mainly used for the lining and tapping hole of the steel-making oxidation reformer, the hot spot of the…
In order to study the effect of bottom blowing gas injection parameters (pressure, flow rate, orifice diameter, etc.) on the erosion rate of breathable bricks, the dissolution rates of salt, borax, sodium carbonate and mixtures of salt and sodium carbonate in different proportions in water were compared. Natural salt bricks were selected to simulate the…
The production line equipment of the No. 1 Wire Rod Plant of Shougang Group. is imitating the design of the fifth-generation Morgan rolling mill and produced by domestic manufacturers. The maximum stable rolling speed of this production line is 88m/s. The whole line consists of 28 rolling mills, including 14 roughing and intermediate rolling mills,…
Principles of rolling mill selection The main basis for the selection of the rolling mill is the steel grade, product variety and specification, the size of the production scale and the product production process determined by the workshop. When choosing a rolling mill, generally pay attention to the following principles: 1) Under the premise of…
Risk factors 1: When adding molten iron, due to the defect and damage of the spreader, it is easy to cause scalding due to improper or misoperation of the lifting personnel. Precautions1: Command the crane to lift the molten iron at the specified safe station. The crane commander who holds the certificate shall instruct the…
electric furnace: The electric furnace steelmaking method mainly uses arc heat. In the arc action zone, the temperature is as high as 4000 ℃. The smelting process is generally divided into a melting period, an oxidation period and a reduction period. In the furnace, not only an oxidizing atmosphere but also a reducing atmosphere can…
The high-speed steel roll material contains high alloy elements such as vanadium, tungsten, chromium, molybdenum, niobium, etc. The types of carbides in the roll structure are mainly MC type and M2C type. Compared with ductile iron rolls and high-nickel-chromium rolls, the single-groove (time) steel passing is higher, which saves roll changing time, improves rolling mill…
Work Roll Material Selection The work rolls of rolling mill roll before rough rolling (R1): Work rolls before rough rolling must have toughness, wear resistance and thermal crack resistance. The hardness range is about HS40-55. Generally, 60CrNiMo cast steel and other material rolls are used. Work rolls after rough rolling (R2): The work rolls after…