CN102134621B

CN102134621B - Blast furnace iron notch patching method

Info

Publication number: CN102134621B
Application number: CN2010105402559A
Authority: CN
Inventors: 郭昌勇; 邓辉; 卢凤君
Original assignee: Xinxing Ductile Iron Pipes Co Ltd
Current assignee: Xinxing Ductile Iron Pipes Co Ltd
Priority date: 2010-11-11
Filing date: 2010-11-11
Publication date: 2012-06-20
Anticipated expiration: 2030-11-11
Also published as: CN102134621A

Abstract

The invention discloses a blast furnace iron notch patching method. The key improvement of the method is that the method comprises the following steps: (1) the brown corundum bricks and carbon bricks below the central line of the iron notch are dismantled; the dismantling range uses the central line of the iron notch as a reference and is eudipleural, the width of the dismantling range is more than 1200mm, the height is more than 600mm and the depth of the dismantling range from the shell of the furnace to the inside is more than 600mm; (2) the inner wall of the iron notch is finished; (3) brown corundum bricks are laid; at least two layers of brown corundum bricks are laid at the bottom of the cavity formed after the brown corundum bricks and carbon bricks are dismantled; (4) a cooling coil is arranged in the cavity after the brown corundum bricks are laid; (5) a brown corundum filler is poured in the cavity after the cooling coil is arranged; and (6) mud is jacked on the shell of the furnace: after the brown corundum filler is poured, mud is jacked between the poured brown corundum filler and the shell of the furnace and between the laid brown corundum bricks. The invention has the following advantage: the service life of the iron notch can be effectively increased.

Description

A kind of blast furnace taphole restorative procedure

Technical field

The present invention relates to a kind of blast furnace method for maintaining, particularly a kind of blast furnace taphole restorative procedure.

Background technology

Blast furnace ironmaking is to utilize reductive agent at high temperature iron ore or iron-bearing material to be reduced into the process of liquid pig iron; In the whole production smelting process; Blast-furnace body is a nucleus equipment, running efficiency and production efficiency that the efficient height of iron-smelting blast furnace body and the length in life-span will directly influence whole ironmaking workshop system equipment; Existing blast furnace taphole generally adopts brown corundum brick to build by laying bricks or stones, but in use, the iron mouth occurs through regular meeting and burn the phenomenon of metalling run out; Directly influence the normal operation of blast furnace; Also shorten the work-ing life of blast furnace, increased the maintenance and repair cost, reduced the production efficiency in whole workshop.

Summary of the invention

Technical problem to be solved by this invention provides a kind of blast furnace taphole work-ing life of can effectively prolonging, and improves the blast furnace taphole restorative procedure of blast furnace production efficiency.

For solving the problems of the technologies described above, the technical scheme that the present invention adopted is: a kind of blast furnace taphole restorative procedure, and its key improvements is: may further comprise the steps: brown corundum brick and the carbon brick below the iron mouth medullary ray removed in (1); The dismounting scope is the benchmark left-right symmetric with iron mouth medullary ray, and the width of removing scope is greater than 1200 millimeters, and height is greater than 600 millimeters, the dismounting scope from the inside depth of stove skin greater than 600 millimeters; (2) revise iron mouth inwall; Melt on the Tie Kou two side is rooted out; (3) build brown corundum brick by laying bricks or stones; The bottom that behind brown corundum brick of dismounting and carbon brick, forms is built two-layer at least brown corundum brick by laying bricks or stones; (4) spiral coil cooling tube is installed; In building the later cavity of brown corundum brick by laying bricks or stones, spiral coil cooling tube is installed; (5) the brown corundum filler of cast; The brown corundum filler of cast in the later cavity of spiral coil cooling tube is installed; (6) stove skin mud jacking; Accomplish after the cast of brown corundum filler, at mud jacking between the brown corundum filler of cast and the stove skin and between the brown corundum brick of building by laying bricks or stones.

Said step (5) also is included in the brown corundum filler top of cast and builds iron mouth brick by laying bricks or stones, and iron mouth brick and iron mouth frame seam crossing are poured into a mould brown corundum filler.

Adopt the beneficial effect that technique scheme produced to be: the brown corundum brick that replaces original piecemeal to build by laying bricks or stones with integrated poured brown corundum filler below the iron mouth; Improve the high-temperature capability of iron mouth below; Can effectively prolong iron mouth work-ing life, reduce maintenance cost, through experimental verification on 460 cubes of blast furnaces; Also occurred in 3 years leaking slag iron phenomenon through continuous use of the iron mouth of repairing again, can effectively improve the production efficiency of blast furnace.

Embodiment

For making above-mentioned purpose of the present invention, characteristic and beneficial effect can be more obviously understandable, will combine the embodiment of the invention and embodiment below, and the technical scheme in the embodiment of the invention is carried out clear, intactly description.

A kind of blast furnace taphole restorative procedure, its key improvements is: may further comprise the steps: brown corundum brick and the carbon brick below the iron mouth medullary ray removed in (1); The dismounting scope is the benchmark left-right symmetric with iron mouth medullary ray, and the width of removing scope is greater than 1200 millimeters, and height is greater than 600 millimeters, the dismounting scope from the inside depth of stove skin greater than 600 millimeters; (2) revise iron mouth inwall; Melt on the Tie Kou two side is rooted out, consistent until iron mouth inner wall shape and original-shape; (3) build brown corundum brick by laying bricks or stones; The bottom that behind brown corundum brick of dismounting and carbon brick, forms is built two-layer at least brown corundum brick by laying bricks or stones; (4) spiral coil cooling tube is installed; In building the later cavity of brown corundum brick by laying bricks or stones, spiral coil cooling tube is installed; (5) the brown corundum filler of cast; The brown corundum filler of cast in the later cavity of spiral coil cooling tube is installed; (6) stove skin mud jacking; Accomplish after the cast of brown corundum filler, at mud jacking between the brown corundum filler of cast and the stove skin and between the brown corundum brick of building by laying bricks or stones.

In concrete application process; At first remove with the stove skin around the iron mouth with by the cooling stave of scaling loss; And be that benchmark is removed below the medullary ray each side 600 millimeters brown corundum brick and carbon brick with iron mouth medullary ray, removing depth is benchmark with former stove skin, inwardly depth is 600 millimeters; Repair the melt on the Tie Kou two side then, be trimmed to Tie Kou two side regular shape; The 3rd step carried out brown corundum brick and builds by laying bricks or stones, built two-layer brown corundum brick by laying bricks or stones removing the cavity inner bottom part that forms behind brown corundum brick and the carbon brick; The 4th step is the brown corundum filler of cast in laying the cavity of brown corundum brick, and the height of pouring into a mould brown corundum filler is consistent with former iron mouth outer bottom height, and spiral coil cooling tube was installed before cast; The 5th step was on the brown corundum filler end face of cast, to build two-layer iron mouth brick by laying bricks or stones; The 6th step was carried out mud jacking, pressed in the slit between the slit that the brown corundum filler of cast forms later on and the brown corundum brick of building by laying bricks or stones and annotated the refractory seals slurry; The stove skin is installed at last.

Claims

1. a blast furnace taphole restorative procedure is characterized in that: may further comprise the steps: brown corundum brick and carbon brick below (1) dismounting iron mouth medullary ray; The dismounting scope is the benchmark left-right symmetric with iron mouth medullary ray, and the width of removing scope is greater than 1200 millimeters, and height is greater than 600 millimeters, the dismounting scope from the inside depth of stove skin greater than 600 millimeters; (2) finishing iron mouth inwall; Melt on the Tie Kou two side is rooted out; (3) build brown corundum brick by laying bricks or stones; The bottom that behind brown corundum brick of dismounting and carbon brick, forms is built two-layer at least brown corundum brick by laying bricks or stones; (4) spiral coil cooling tube is installed; In building the later cavity of brown corundum brick by laying bricks or stones, spiral coil cooling tube is installed; (5) the brown corundum filler of cast; The brown corundum filler of cast in the later cavity of spiral coil cooling tube is installed; (6) stove skin mud jacking; Accomplish after the cast of brown corundum filler, at mud jacking between the brown corundum filler of cast and the stove skin and between the brown corundum brick of building by laying bricks or stones; Said step (5) also is included in the brown corundum filler top of cast and builds iron mouth brick by laying bricks or stones, and iron mouth brick and iron mouth frame seam crossing are poured into a mould brown corundum filler.