Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation and use method of carbon-containing steel block deoxidizer for vacuum furnace steelmaking

A technology of deoxidizer and vacuum furnace, which is applied in the field of vacuum smelting, can solve the problems such as the deoxidation effect not meeting the requirements, and achieve the effect of fast deoxidation speed and good deoxidation effect

Active Publication Date: 2022-02-18
ANGANG STEEL CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this paper, three different smelting schemes were designed, and the effects of refining parameters, deoxidizer carbon, the type of returned material and its addition ratio on the oxygen and nitrogen content in the GH3030 liquid were studied. The results showed that the 0.08% (mass fraction ) Deoxidizer carbon and 3kg of return material are added into the furnace along with the raw materials. After melting, refining is carried out at a refining vacuum of 30Pa and a refining temperature of 1510°C for 15 minutes. The oxygen in the GH3030 liquid can be controlled to 16ppm, and the nitrogen can be controlled to 7ppm; The adverse effect on the content of oxygen and nitrogen in the GH3030 liquid is greater than that of shavings and risers. This document uses conventional carbon deoxidation, and the deoxidation effect cannot meet the requirements.

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 more

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] A method for preparing a carbon-containing steel block deoxidizer for vacuum furnace steelmaking, using a vacuum furnace as a smelting equipment, and using industrial pure iron and a recarburized alloy as raw materials; specifically includes:

[0027] 1) Melting industrial pure iron through a vacuum smelting process, adding recarburizing alloy after the industrial pure iron is melted, controlling the amount of recarburizing alloy so that the carbon content in the final carbon-containing steel block deoxidizer is 0.2wt%-1.5wt%;

[0028] 2) After pouring the steel ingot, carry out rolling or direct cutting processing to ensure that the length, width and height of the deoxidizer steel block are within 20mm-60mm;

[0029] The deoxidizer contains a certain amount of carbon, and the matrix is ​​similar to the steelmaking raw material industrial pure iron except for carbon, and after the deoxidizer is vacuum smelted once, its internal impurities and harmful elements are less, a...

Embodiment approach 1

[0040] The method provided by the present invention is applied in 50kg vacuum furnace smelting certain steel grade, and concrete scheme is as follows:

[0041] 1) Use the vacuum furnace smelting process to melt industrial pure iron, add graphite electrodes during the smelting process, ensure that the carbon content in the final deoxidizer is 0.5wt%, cast steel ingots and carry out rolling. The rolling thickness is 20mm, and the steel plate is processed into a small steel block of 20mm×20mm×20mm for later use.

[0042] 2) Put 3 kg of steel block into the feeding tank of the vacuum furnace, place 40 kg of industrial pure iron in the crucible, melt under high vacuum, and heat up to 60 degrees Celsius above the liquidus line after all the furnace materials are melted.

[0043] 3) Add 1 / 3 of the steel ingots, the reaction occurs in the molten pool, and bubbles continue to overflow from the molten pool. After no more bubbles are generated in the molten pool, add the remaining steel ...

Embodiment approach 2

[0049] The method provided by the invention is applied in 200kg vacuum furnace smelting certain steel grade, and concrete scheme is as follows:

[0050] 1) Use the vacuum furnace smelting process to melt industrial pure iron, add petroleum coke during the smelting process, ensure that the carbon content in the deoxidizer is at 1wt%, cast steel ingots and carry out rolling. The rolling thickness is 30mm, and the steel plate is processed into small steel blocks of 30mm×20mm×30mm for later use;

[0051] 2) Put 6 kg of steel block into the feeding tank of the vacuum furnace, place 140 kg of industrial pure iron in the crucible, melt under high vacuum, and heat up to 80 degrees Celsius above the liquidus line after all the furnace materials are melted;

[0052] 3) Add 1 / 3 of the steel ingots, the reaction occurs in the molten pool, and bubbles continue to overflow from the molten pool. After no more bubbles are generated in the molten pool, add the remaining steel ingots in two bat...

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

No PUM Login to View More

Abstract

A method for preparing and using a carbon-containing steel block deoxidizer for vacuum furnace steelmaking, using a vacuum furnace as smelting equipment, and using industrial pure iron and recarburized alloys as raw materials; specifically including: 1) Melting industrial pure iron through a vacuum smelting process After industrial pure iron is melted, add carburizing alloy, control the addition of carburizing alloy so that the carbon content in the final carbon-containing steel block deoxidizer is 0.2wt%-1.5wt%; 2) rolling or directly Cutting process ensures that the length, width and height of the deoxidizer steel block are 20mm‑60mm. The beneficial effects of the invention are as follows: 1) When the recarburizer is added to the steel block, carbon can directly enter the molten steel with the steel block for deoxidation, and the deoxidation effect is better than directly adding the carburant. 2) The carbon monoxide gas generated by carbon deoxidation floats up, which can remove harmful gases and impurities in steel. 3) The deoxidation speed is fast.

Description

technical field [0001] The invention belongs to the field of vacuum smelting, in particular to a method for preparing and using a carbon-containing steel block deoxidizer for vacuum furnace steelmaking. Background technique [0002] Vacuum smelting is a metallurgical process that uses a vacuum furnace to complete the melting and casting of ordinary steel, special steel, high-temperature alloys and other materials under vacuum or protective atmosphere conditions. It can better control the alloy composition and has electromagnetic stirring. And powerful high vacuum degassing ability. Deoxidizers for conventional steelmaking mainly include aluminum, silicon, manganese, rare earth and some composite deoxidizers. Because the vacuum induction furnace is smelted under vacuum conditions, the ability of carbon deoxidation is greatly improved, and the deoxidation of aluminum is surpassed under a certain degree of vacuum. Therefore, the general vacuum furnace uses a carburant as a deo...

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
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/06C22C33/06C22C35/00
CPCC21C7/06C21C7/0006C22C35/00C22C33/06
Inventor 于明光张津业李新王红岩谢文强范竞韬
Owner ANGANG STEEL CO LTD