Method for shortening sintering time of resistant material of electric furnace at time of opening new furnace

Abstract

The present invention discloses a method used for shortening the sintering time of the refractory material of an electric furnace when a novel furnace is opened. Before the production of the first furnace of the newly opened furnace, a layer of petroleum coke recarbonizer is spread uniformly on the ramming material that has been arranged on the slope of the bottom of the furnace. The method can shorten the sintering time of the refractory material of the electric furnace when a novel furnace is opened, save the energy consumption of the electric furnace, and improve the quality of electric steelmaking. At the same time, the method ensures the excellent sintering effects of the refractory material on the bottom of the furnace, and prolongs the service life of the refractory material.

Description

technical field

[0001] The invention belongs to the field of electric furnace smelting industry, and in particular relates to a method for shortening the sintering time of electric furnace refractory materials when starting a new furnace. Background technique

[0002] The production of the first furnace is the most important link to maintain the life of the refractory material at the bottom of the furnace. The first furnace should be made of small, light and thin materials with good conductivity and high quality, about 10% of pig iron, and no hot charging of molten iron. ingredient principle. Since the DC electric furnace supplies power through the electrodes or conductive furnace bottom of the furnace bottom, the sintering of the furnace bottom refractory material is more important. The sintering effect of the furnace bottom refractory material directly affects the service life of the entire electric furnace refractory material.

[0003] It should take 3.5-4.5 hours from t...

Examples

Embodiment

[0016] Embodiment: applicant Suzhou Iron and Steel Group Electric Furnace Factory, the electric furnace furnace type that adopts: 100DC EBT6.6 / 100, the inner diameter of lower furnace shell of this 100 tons electric furnace is 6500mm, bottom shell radius 7850mm, furnace shell capacity 115t; Use bagged calcined oil Coke carburizer: fixed carbon ≥ 98.5%, sulfur ≤ 0.5%, ash ≤ 0.5%), 20 kg of petroleum coke carburizer per bag.

[0017] Before starting the production of the first furnace of a new furnace, prepare spare electric furnace refractory materials according to the normal furnace construction process, and then pack the above-mentioned bagged calcined petroleum coke carburizer evenly on the slope of the rammed furnace bottom. The average laying thickness is about 30mm, the laying amount is basically about 180 kg / square meter, and the consumption is about 5 tons.

[0018] When opening a new furnace, 3 baskets of scrap steel are made, and hot metal is normally hot-charged. Aft...

technical field

[0001] The invention belongs to the field of electric furnace smelting industry, and in particular relates to a method for shortening the sintering time of electric furnace refractory materials when starting a new furnace. Background technique

[0002] The production of the first furnace is the most important link to maintain the life of the refractory material at the bottom of the furnace. The first furnace should be made of small, light and thin materials with good conductivity and high quality, about 10% of pig iron, and no hot charging of molten iron. ingredient principle. Since the DC electric furnace supplies power through the electrodes or conductive furnace bottom of the furnace bottom, the sintering of the furnace bottom refractory material is more important. The sintering effect of the furnace bottom refractory material directly affects the service life of the entire electric furnace refractory material.

[0003] It should take 3.5-4.5 hours from t...

Examples

Embodiment

[0016] Embodiment: applicant Suzhou Iron and Steel Group Electric Furnace Factory, the electric furnace furnace type that adopts: 100DC EBT6.6 / 100, the inner diameter of lower furnace shell of this 100 tons electric furnace is 6500mm, bottom shell radius 7850mm, furnace shell capacity 115t; Use bagged calcined oil Coke carburizer: fixed carbon ≥ 98.5%, sulfur ≤ 0.5%, ash ≤ 0.5%), 20 kg of petroleum coke carburizer per bag.

[0017] Before starting the production of the first furnace of a new furnace, prepare spare electric furnace refractory materials according to the normal furnace construction process, and then pack the above-mentioned bagged calcined petroleum coke carburizer evenly on the slope of the rammed furnace bottom. The average laying thickness is about 30mm, the laying amount is basically about 180 kg / square meter, and the consumption is about 5 tons.

[0018] When opening a new furnace, 3 baskets of scrap steel are made, and hot metal is normally hot-charged. Aft...