A method for producing electroslag steel for high-chromium and low-phosphorus rolls
A technology of high chromium and electroslag, applied in the field of electrometallurgy in the metallurgical industry, can solve the problems of yield discount and other problems, and achieve the effect of good organization, rich economic benefits and good feasibility
Inactive Publication Date: 2014-10-29
XINGTAI IRON & STEEL
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] At present, when producing electroslag steel for rolls with a chromium content of more than 3.00% and a phosphorus content of less than 0.012%, electric furnaces are generally used to achieve high chromium alloy content through high-power electrode heating, and multiple slags are used to achieve low phosphorus. control, so as to ensure the continuity of the electrode billet production; for the electrode billet, a fixed electroslag furnace is often used to produce electroslag steel, and the height of the electroslag ingot is generally about 2 meters. Therefore, when producing rolls, considering factors such as the amount of head and tail removal, the yield rate is greatly reduced.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0019] The present invention will be further described below through embodiment.
[0020] In the embodiment, a certain electroslag ingot with a circle of 600 millimeters and a length of 6 meters is selected to further illustrate the present invention.
[0021] (1) 77.1 tons of molten iron with a phosphorus content of 0.093% by weight and 8.1 tons of ordinary carbon steel scrap are used as the converter steel materials. The amount of lime, magnesium balls, light-burned dolomite, iron oxide balls, and limestone in bulk materials is 4734, 206, 665, 904, 1489 kg, the temperature of one-time carbon drawing is 1592 °C, the weight ratio content of molten steel in front of the furnace is 0.005%, and the temperature of carbon drawing after a supplementary blowing is 1637 °C, and 2704 kg of high-carbon ferrochrome is added during the tapping process, and the output The amount of steel is 81.55 tons;
[0022] (2) The weight ratio content of chromium in the LF furnace is 1.97%, and the w...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| length | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a method for producing high-chromium low-phosphorus electroslag steel for rollers, belonging to the technical field of electrometallurgy in metallurgy industry. The technical scheme is as follows: the method comprises the steps of top / bottom combined blown converter smelting, LF (ladle furnace) refinement, RH vacuum degassing, square billet continuous casting, and double-electrode series electroslag remelting with withdrawing of ingot. The method can product the high-chromium low-phosphorus electroslag steel for rollers with lower cost and higher yield. Compared with the traditional electric-furnace-cooperated fixed type electroslag remelting technique for producing steels for rollers, the method provided by the invention lowers the production cost by about 300 Yuan per ton of steel, and enhances the comprehensive yield by 10%. In the electroslag steel ingot finished product which is 600 millimeter in diameter and 6 meters long, the chromium content is controlled above 3.00%, the phosphorus content is controlled below 0.012%, and stable and optimized control of other chemical elements is also realized; and the high-chromium low-phosphorus electroslag steel for rollers has good surface quality and internal structure. The method well satisfies the demands of downstream users, and implements high economic benefit.
Description
technical field [0001] The invention relates to a method for producing electroslag steel for high-chromium and low-phosphorus rolls, and belongs to the technical field of electrometallurgy in the metallurgical industry. Background technique [0002] At present, when producing electroslag steel for rolls with a chromium content of more than 3.00% and a phosphorus content of less than 0.012%, electric furnaces are generally used to achieve high chromium alloy content through high-power electrode heating, and multiple slagging to achieve low phosphorus control, so as to ensure the continuity of the electrode billet production; for the electrode billet, a fixed electroslag furnace is often used to produce electroslag steel, and the height of the electroslag ingot is generally about 2 meters. Therefore, when producing rolls, considering factors such as head and tail removal, the yield rate is greatly reduced. Contents of the invention [0003] The purpose of the present invent...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04B22D23/10
Inventor 王利伟薛正学都郢祁张治广田新中郭兴坤郭保善潘光忠苏庆林闫丽珍
Owner XINGTAI IRON & STEEL