CN201873697U

CN201873697U - Novel blast furnace tapping channel

Info

Publication number: CN201873697U
Application number: CN2010206287341U
Authority: CN
Inventors: 龚仕顺; 何见林; 黄志明; 洪学勤; 胡波; 田先明; 张中顺; 雷中兴; 高永生; 丁国松
Original assignee: Wuhan Iron and Steel Group Corp
Current assignee: Wuhan Iron and Steel Group Corp
Priority date: 2010-11-26
Filing date: 2010-11-26
Publication date: 2011-06-22
Anticipated expiration: 2020-11-26

Abstract

The utility model relates to a tapping channel of a smelting blast furnace, which comprises a channel housing, a permanent brick lining, an operating layer, a brick and castable mixed slag section, a molten iron section, a molten iron passage, an interface between iron slag and molten iron, and a combining layer above the interface between the iron slag and the molten iron, wherein the permanent brick lining and the operating layer are arranged inside the channel housing. Refractory bricks built on two sides of the molten iron passage in full length form an erosion resistant layer, the erosion resistant layer is in a convex structure with a thick middle and two thin ends, a convex portion of the erosion resistant layer is an erosion resistant section, the erosion resistant section is arranged on a portion of the molten iron passage bearing large molten iron eroding force, brick layers of the erosion resistant section are 50-80 mm thicker than other portions, a gap is reserved between each two adjacent brick layers of the erosion resistant layer while the brick layers are distributed in a dislocated manner, and castable is poured into the gaps among the brick layers to form a reinforcing layer. The tapping channel is fine in erosion resistance and oxidization resistance, convenient in field building and maintenance, short in replacement time, high in iron influx, better in integral uniformity of erosion resistance rates, and longer in service cycle.

Description

The novel blast-furnace casting house

Technical field

The utility model relates to iron-smelting blast furnace, specifically belongs to the casting house of iron-smelting blast furnace.

Background technology

Along with the raising of smelting iron and steel technology, blast furnace develops towards the direction of maximization, longevityization, but has restricted the high yield of blast furnace the work-ing life of the blast furnace iron outlet groove that matches with blast furnace.

The high temperature liquid iron and the slag that come out from the blast furnace iron notch jet flow at first enter the casting house tap drain, and around falling iron spot, tap drain forms an impact zone, tap drain both sides working lining is washed away by molten iron and the erosion of scum in the impact zone scope, damage is very fast, especially untouchable and at the main iron hook slag with the upper part, it washes away, corrodes more serious, damages faster.At present, casting house tap drain working lining generally adopts Al ₂O ₃-SiC-C matter mould material comes into operation after cast-in-site, baking during use.Though this mould material can satisfy the blast furnace iron outlet groove requirement, have following shortcoming: 1) slag corrosion resistance, anti-molten iron performance of flushing are poor; 2) limited by environmental factors during site operation, construction quality can not get guaranteeing; 3) long, ton iron cost height of replacement cycle; In addition, people are in order to overcome the deficiency of above-mentioned existence, proposed a kind of at the working lining employing brick of iron runner slag section and the masonry technology that mixes of mould material, the employing of this technology, though solved the anti-degradation degree of working lining of iron runner slag section, but from whole casting house analysis, the whole anti-discordance of washing away speed of casting house then can occur, the whole life cycle of casting house is relatively still shorter.

The utility model content

The purpose of this utility model is to overcome the deficiency of present existence, and the whole anti-consistence of washing away speed of the strong but also casting house of a kind of not only anti-erosion, the erosion resistibility casting house of iron-smelting blast furnace preferably is provided.

Realize the technical measures of above-mentioned purpose:

The novel blast-furnace casting house, it is made up of the key coat on the separation surface of separation surface, scum and the molten iron of the mixed slag blanket section of permanent bricking layer, working lining, brick and mould material in iron runner shell, the iron runner shell, molten iron section, molten iron passage, scum and molten iron, it is characterized in that: the both sides total length of molten iron passage is built fire proof material brick by laying bricks or stones and is formed anti-erosional layer, anti-erosional layer be shaped as the thin convex structure in thick two ends, middle part, nose portion is the anti-section of washing away, and the molten iron that the anti-section of washing away is located at the molten iron passage is subjected to the big part of scouring force; The brick layer thickness of the anti-section of washing away is thicker than 50～80 millimeters of rest parts; Between the layer of anti-erosional layer and layer, be provided with the gap, and the dislocation layout, filling mould material formation enhancement layer in the gap between layer and the layer.

It is characterized in that: the brick of aluminum-silicon carbide brick layer and the clearance distance between the brick are the thickness of an aluminum-silicon carbide brick.

It is characterized in that: the brick layer thickness of the rest part of the thickness of anti-erosional layer except that the anti-section of washing away is 80～120 millimeters.

The present invention compares with existing casting house technology, not only erosion resistance and good in oxidation resistance, and build by laying bricks or stones conveniently at the scene, easy to maintenance, and it is short to change the time spent, the iron influx height, and also the whole anti-consistence of washing away speed of casting house is better, and life cycle is longer.

Description of drawings

Fig. 1 is the structural representation of novel blast-furnace casting house

Fig. 2 is the A-A sectional structure synoptic diagram of Fig. 1

Fig. 3 is that B among Fig. 1 is to structural representation

Among the figure: separation surface, 7 key coats, 8 convex fire proof material brick layers, the 9 anti-sections of washing away, 10 gaps, 11 enhancement layers of 1 iron runner shell, 2 permanent bricking layers, 3 working linings, 4 molten iron sections, 5 molten iron passages, 6 scums and molten iron.

Embodiment

Be described further below in conjunction with accompanying drawing:

The novel blast-furnace casting house, it is made up of the key coat 7 on the separation surface 6 of separation surface 6, scum and the molten iron of permanent bricking layer 2, working lining 3, molten iron section 4, molten iron passage 5, scum and molten iron in iron runner shell 1, the iron runner shell 1.It builds into convex fire proof material brick layer 8 by laying bricks or stones in molten iron passage 5 both sides total lengths, and the male portion on the convex fire proof material brick layer 8 is divided into the anti-section of washing away 9, and the anti-section of washing away 9 is located at iron runner and is subjected to molten iron to wash away bigger middle portion; The base thickness of convex fire proof material brick layer 8 is 80 millimeters/100 millimeters/120 millimeters, and the thickness of the anti-section of washing away 9 then is 130 millimeters/160 millimeters/200 millimeters; Build the gap 10 that a brick thickness is arranged between the brick of fire proof material brick layer and the brick by laying bricks or stones in the both sides of molten iron passage 5, layer with layer between the brick and the layout that misplaces, fill Al in the gap 10 between brick and brick ₂O ₃The mould material of-SiC-C material and form enhancement layer 11.

Claims

1. novel blast-furnace casting house, it is made up of the key coat on the separation surface of separation surface, scum and the molten iron of the mixed slag blanket section of permanent bricking layer, working lining, brick and mould material in iron runner shell, the iron runner shell, molten iron section, molten iron passage, scum and molten iron, it is characterized in that: the both sides total length of molten iron passage is built fire proof material brick by laying bricks or stones and is formed anti-erosional layer, anti-erosional layer be shaped as the thin convex structure in thick two ends, middle part, nose portion is the anti-section of washing away, and the molten iron that the anti-section of washing away is located at the molten iron passage is subjected to the big part of scouring force; The brick layer thickness of the anti-section of washing away is thicker than 50～80 millimeters of rest parts; Between the layer of anti-erosional layer and layer, be provided with the gap, and the dislocation layout, filling mould material formation enhancement layer in the gap between layer and the layer.

2. novel blast-furnace casting house as claimed in claim 1 is characterized in that: the brick of aluminium silicon carbide carbon-coating and the clearance distance between the brick are the thickness of an aluminum-silicon carbide brick.

3. novel blast-furnace casting house as claimed in claim 1 is characterized in that: the brick layer thickness of the rest part of the thickness of anti-erosional layer except that the anti-section of washing away is 80～120 millimeters.