The main reason is that the rolls with different characteristics can be selected reasonably from the difference of the hole type of each unit, the deformation characteristics of the rolling parts, and the accuracy requirements of the products. The main properties of the rolls are marked with core strength and work layer wear resistance. When…
From the analysis of the chemical composition of the broken roll, except for the high S content, the content of other elements is basically normal, and the macroscopic structure of the roll is not too abnormal. The author observed on the spot that there was a problem with the “cast iron” in the charge. The…
During the period of time, the engineer systematically observed the materials, smelting, spheroidizing, gestating and pouring, and found the problem in the 14th smelting. The plant collects the slag from the molten iron after the spheroidization with magnesium addition to a certain amount (this period is about one month), and it is once put into…
A roll mill is producing small and medium-sized centrifugal rolls. The water spheroidizing agent is made of rare earth magnesium ferrosilicon alloy (FeSiMg8RE5), and the rare earth magnesium ferrosilicon alloy is added in an amount of 1.80%~2.30%. A rare earth magnesium ferrosilicon alloy is used as a spheroidizing agent, and is spheroidized by a punching…
Preface There are 180t top and bottom combined blowing converter in a steel plant. The lining is built by simple upper repair method, and the working layer is made of magnesia carbon refractory brick. The converter has been put into operation from February 2009 to March 2010, with a furnace life of 8288 times. In…
Introduction The foreign substances in the black stripe defect are mainly magnesium-alumina spinel and feldspar, and a small amount of perovskite, which comes from ladle slag.The foreign material in the gray stripe defect is mainly magnesium oxide and contains a small amount of feldspar.The foreign material in the irregular strip gap is mainly alumina, containing…
After the first successful research in Japan, the magnesia carbon brick was first used in the hot spot of the high and ultra high power electric furnace and the air supply nozzle of the bottom blowing converter. In the future, Japan used magnesia carbon bricks in various parts of the converter. The life of the converter is increased by about 1.3 to 1.6 times compared with the magnesium dolomite brick immersed in tar.
The utility model belongs to the field of refractory components of converter tap hole, in particular to a magnesia carbon brick of converter tap hole. The utility model has long service life and convenient installation.
The top-bottom combined blown converter is currently the most widely used steelmaking equipment in the world, and the length of the lining life directly affects the converter operation rate and production cost of the steel mill. In recent years, with the development of converter steelmaking towards high-strength, large-scale and smelting high-quality steel grades, higher requirements have been placed on furnace-lined refractories.
The utility model belongs to the field of refractory components of converter tap hole, in particular to a magnesia carbon brick of converter tap hole. The utility model has long service life and convenient installation
