Rapid furnace opening method

Abstract

A rapid blow-in method comprises the following steps that (1) an air supply pipeline is pre-buried in an iron notch; (2) the main channel is filled with ramming mass and coke powder; (3) baking the furnace; (4) selecting a furnace opening material; (5) nitrogen cooling; (6) charging with wind; (7) hot air ignition; and (8) quickly introducing coal gas. The method has the beneficial effects that the consumed time is short, the efficiency is high, and the environmental protection and safety problems are reduced; the oven adopts a helical blade hot air shunting table for uniformly shunting hot air, so that the oven baking time is greatly shortened; coke and firewood mixed loading facilitates air supply, facilitates rapid ignition and combustion, makes space for descending of the upper furnace burden, and facilitates rapid loosening of the stock column. Charging with wind has a remarkable effect on drying coke and moisture of a charging material, the blow-in total coke ratio can be reduced by 200-300kg / t, and the phenomenon of material collapse and suspension in the blow-in process of the blast furnace is reduced; and clay gun tapping is omitted during tapping of the iron notch embedded air supply pipeline, so that the tapping time is shortened, and the tapping efficiency is improved. Compared with the conventional technology, the method provided by the invention can shorten the blow-in time by 8-12 hours.

Description

technical field

[0001] The invention relates to a blast furnace ironmaking process method, in particular to a rapid furnace opening method. Background technique

[0002] Large and medium-sized blast furnaces in ironworks in the metallurgical industry face multiple start-ups such as completion and commissioning, overhaul start-up, and intermediate repair start-up during the entire life cycle. Blast furnace opening is a complicated project and a relatively complicated operation process in ironmaking production. The status and conditions of blast furnace before starting the furnace are different, and the conditions of starting the furnace are also very different. At present, there are two main methods of starting the furnace, one is to start the furnace with sleepers filling the hearth, and the other is to use full-coke furnace. The traditional full-coke furnace is slow to start, coke burns slowly, and the material moves slowly. The slag made of limestone is easy to pulverize...

Examples

Embodiment Construction

[0031] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments. Apparently, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] This embodiment specifically includes the following steps:

[0033] (1) Iron port pre-buried air supply pipeline: see figure 1 A ductile iron pipe 1 with an inner diameter of 30-35mm is embedded in the iron gate, part of the air supply pipe goes deep into the hearth 6 center of the blast furnace, and the gas supply pipe is located in half of the blast furnace hearth to be protected by a refractory mud bag Layer 5, the gas supply pipeline is located outside the blast furnace and is equi...

technical field

[0001] The invention relates to a blast furnace ironmaking process method, in particular to a rapid furnace opening method. Background technique

[0002] Large and medium-sized blast furnaces in ironworks in the metallurgical industry face multiple start-ups such as completion and commissioning, overhaul start-up, and intermediate repair start-up during the entire life cycle. Blast furnace opening is a complicated project and a relatively complicated operation process in ironmaking production. The status and conditions of blast furnace before starting the furnace are different, and the conditions of starting the furnace are also very different. At present, there are two main methods of starting the furnace, one is to start the furnace with sleepers filling the hearth, and the other is to use full-coke furnace. The traditional full-coke furnace is slow to start, coke burns slowly, and the material moves slowly. The slag made of limestone is easy to pulverize...

Examples

Embodiment Construction

[0031] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments. Apparently, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] This embodiment specifically includes the following steps:

[0033] (1) Iron port pre-buried air supply pipeline: see figure 1 A ductile iron pipe 1 with an inner diameter of 30-35mm is embedded in the iron gate, part of the air supply pipe goes deep into the hearth 6 center of the blast furnace, and the gas supply pipe is located in half of the blast furnace hearth to be protected by a refractory mud bag Layer 5, the gas supply pipeline is located outside the blast furnace and is equi...

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