CN201421265Y

CN201421265Y - Water cooling cast steel furnace throat steel brick

Info

Publication number: CN201421265Y
Application number: CN2009200388670U
Authority: CN
Inventors: 程树森; 樊旭初; 潘宏伟; 王志斌
Original assignee: Jiangsu Lianxing Complete Sets of Equipment Manufacture Co Ltd
Current assignee: Jiangsu Lianxing Complete Sets of Equipment Manufacture Co Ltd
Priority date: 2009-05-08
Filing date: 2009-05-08
Publication date: 2010-03-10
Anticipated expiration: 2019-05-08

Abstract

The utility model discloses a water cooling cast steel furnace throat steel brick, which comprises a steel brick base body and a cooling water pipe, and is characterized in that the steel brick base body and the cooling water pipe are made from cast steel, the steel brick base body is in a U shape, the cooling water pipe is arranged in the steel brick base body and is tightly attached on the steelbrick base body, and the two ends of the cooling water pipe extend out of the two ends of the U-shaped steel brick base body. The utility model adopts the cast steel to substitute for the existing cast iron and the like to produce the water cooling cast steel furnace throat steel brick, can effectively avoid the air gap between the steel brick base body and the cooling water pipe, prolongs the service life of the water cooling cast steel furnace throat steel brick, therefore prolonging the service life of the metallurgy high-temperature kiln, saving the production cost, in addition, the cooling water pipe is directly cast in the base body, so the cooling water pipe can be tightly combined with the steel brick base body in a surface microfusion method, the cooling effect of the steel brickis improved, and the mechanical capacity of the water cooling cast steel furnace throat steel brick is improved.

Description

The steel brick of cast steel furnace throat of band water-cooled

Technical field

The utility model relates to a kind of high temperature cooling device, specifically relates to a kind of steel brick of cast steel furnace throat that is used for the band water-cooled of metallurgy high temperature stove, belongs to metallurgical ironmaking technology field.

Background technology

Throat armour is the device that cooling and protection are provided for the metallurgy high temperature stove; can protect the metallurgy high temperature stove to avoid the erosion and the mechanical wear of high temperature fluid in the body of heater; prolong the metallurgy high temperature stove life-span; guarantee its safety and stability production; so; the life-span of life-span of throat armour decision metallurgy high temperature stove is metallurgy high temperature stove longevity, efficient, energy-conservation important assurance.

The material of the throat armour that current domestic and international metallurgical industry is generally adopted is based on cast iron, but, there are many deficiencies in the cast iron throat armour, with most popular spheroidal graphite cast-iron throat armour is example: (1) spheroidal graphite cast-iron throat armour must add anti-carburization coating outside the cooling duct, make between passage and the matrix and form air gap, and air gap makes the throat armour heat transmission resistance increase more than 1,000 times, worsened the heat-transfer effect of throat armour, increase the working face temperature of throat armour, quickened the breakage of throat armour; (2) be covered with the globular graphite (particle diameter 0.025～0.150mm) that varies in size on the spheroidal graphite cast-iron matrix, countless small holes have been equivalent to form after globular graphite is oxidized, constituted the cradle that crack and crackle take place, quickened the expansion of crack and crackle, thereby cause throat armour to shorten service life, increase resource consumption, be unfavorable for throat armour longevity, energy-conservation; (3) when the large-scale spheroidal graphite casting of casting, C, S, P are pushed to liquid zone easily in the column crystallization process, form a segregation thing enrichment region in center equiax crystal district, the percentage elongation at cast(ing) surface and center is existed than big-difference, the surface percentage elongation is greater than the centre more than one times, promote the generation and the expansion of spheroidal graphite cast-iron crack or crackle, be unfavorable for throat armour longevity; (4) linear expansion coefficient of spheroidal graphite cast-iron is more steady in variation below 600 ℃, but more than 600 ℃ then the rising with temperature rapid irreversible " growth " takes place, when temperature during greater than 709 ℃ matrix phase transformation has taken place, the coefficient of expansion and internal stress sharp increase, its breakage speeds up; (5) spheroidal graphite cast-iron thermal conductivity and thermal shock resistance are all relatively poor, and its thermal conductivity factor only is 30wm ^-2K ^-1, be unfavorable for the efficient cooling of throat armour.

From domestic and international research situation to throat armour, less in the application problem research of metallurgical industry abroad to the steel brick of cast steel furnace throat of band water-cooled, and it is domestic because metallurgical industry is very big to the throat armour demand, therefore the steel brick of cast steel furnace throat to the band water-cooled has carried out Primary Study, domestic indivedual enterprise puts into practice the production of the steel brick of cast steel furnace throat of band water-cooled, but the result is not satisfactory, main cause comprises five aspects, first, in cast throat armour process, the cooling duct is very easily by the high-temperature molten steel burn through, the percent defective height; The second, molten steel cleaningization technology lacks system research, the properties of product instability in the steel brick of cast steel furnace throat one-time cast-forming process of band water-cooled; The 3rd, in casting process, cooling duct inner easily generation oxidation, product quality reduces greatly; The 4th, the throat armour of metallurgical industry belongs to thick and large casting, and mass defects such as the pore of thick and large casting, loose, segregation do not solve at casting industry always as yet fully, in addition, the Technology for Heating Processing shortage system research at the steel brick of cast steel furnace throat of being with water-cooled does not propose specification of heat treatment as yet, therefore, the steel brick of cast steel furnace throat yield rate of band water-cooled is not high, and performance is not good, and the life-span is not long.

The utility model content

In order to overcome the problem that prior art exists, the purpose of this utility model is to provide the steel brick of cast steel furnace throat of a kind of long service life, efficient, energy-conservation band water-cooled.

For achieving the above object, the utility model is to realize by following technical scheme:

A kind of steel brick of cast steel furnace throat with water-cooled, comprise steel brick matrix, cooling water pipe, it is characterized in that the material of described steel brick matrix and cooling water pipe all is a cast steel, steel brick matrix is a U-shaped, cooling water pipe is positioned at steel brick matrix, combine closely in the little molten mode in surface with steel brick matrix, stretch out from two ends of U-shaped steel brick matrix at its two ends.

The cross section of described cooling water pipe is oval, and the length ratio of its major axis and minor axis is 0.5～0.7.

Also can be provided with protective casing on the outer surface of cooling water pipe end, and can be many, in casting process, only show little melting, remelting and crystallization more do not take place substantially, keep the original good rolling performance of cooling water pipe.

The steel brick of cast steel furnace throat of described band water-cooled can also comprise positioning bolt hole and cross temperature hole, and positioning bolt hole is a plurality of, is convenient to firmly contact with High-temp. kiln.

The beneficial effects of the utility model are: materials such as the alternative existing cast iron of the utility model employing cast steel material are made the steel brick of cast steel furnace throat of band water-cooled, can effectively avoid producing air gap between steel brick matrix and cooling water pipe, prolonged the service life of the steel brick of cast steel furnace throat of band water-cooled, and then prolonged life-span of metallurgy high temperature kiln, saved production cost; Simultaneously because cooling water pipe is cast directly in the steel brick matrix, so its very tight with steel brick matrix bond has improved cooling effect and the mechanical performance of being with the steel brick of cast steel furnace throat of water-cooled.

Description of drawings

Fig. 1 is the structural representation of the steel brick of cast steel furnace throat of band water-cooled of the present utility model;

Fig. 2 is that the A of Fig. 1 is to view.

Main mark implication among the figure:

1, steel brick matrix 2 cooling water pipes 3, protective casing 4, cross temperature hole

5, positioning bolt hole

The specific embodiment

Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.

Fig. 1 is the structural representation of the steel brick of cast steel furnace throat of band water-cooled of the present utility model; Fig. 2 is that the A of Fig. 1 is to view.

As depicted in figs. 1 and 2: a kind of steel brick of cast steel furnace throat with water-cooled; comprise steel brick matrix 1; cooling water pipe 2; protective casing 3; cross temperature hole 4 and positioning bolt hole 5; the material of steel brick matrix 1 and cooling water pipe 2 all is a cast steel; steel brick matrix 1 is a U-shaped; cooling water pipe 2 is positioned at steel brick matrix 1; with steel brick matrix 1 to fit tightly; stretch out from two ends of U-shaped steel brick matrix 1 at its two ends; the cross section of cooling water pipe 2 is oval; major axis is 0.5～0.7 with the length ratio of minor axis; in order to improve cooling effect; cooling water pipe 2 can adopt many; what present embodiment adopted is 4; be arranged on abreast in the steel brick body 1, the protection pipe box 3 be enclosed within on the outer surface of cooling water pipe 2 ends, and cross temperature hole 4 and positioning bolt hole 5 lay respectively at U-shaped steel brick matrix 1 two ends on; wherein positioning bolt hole 5 is a plurality of, and what present embodiment adopted is 4.

Embodiment 1: the cross section of aforementioned cooling water pipe 2 is oval, and major axis is 0.5 with the length ratio of minor axis.

Embodiment 2: the cross section of aforementioned cooling water pipe 2 is oval, and major axis is 0.6 with the length ratio of minor axis.

Embodiment 3: the cross section of aforementioned cooling water pipe 2 is oval, and major axis is 0.7 with the length ratio of minor axis.

The utility model all is chosen to be cast steel with the material of cooling water pipe 2 and the basic material of steel brick matrix 1, has effectively avoided a series of problems of using anti-carburization coating and bringing; Cooling water pipe 2 is cast directly over steel brick matrix 1 inside; in casting process; utilize composite solid cooling medium to pass through cooling water pipe 2 with fluid; protection cooling water pipe 2 melts and does not change; impel cooling water pipe 2 surface in casting process little molten; fit tightly with steel brick matrix 1; do not produce air gap; remelting and crystallization more do not take place substantially; keeping the original good rolling performance of cooling water pipe; and the process of setting of control steel brick matrix 1, the condition of formation consecutive solidification, the performance of the steel brick of cast steel furnace throat of raising band water-cooled.

The cardinal principle that the steel brick of cast steel furnace throat of band water-cooled of the present utility model is applied to the metallurgy high temperature stove is: will place the high-temperature area inboard of metallurgy high temperature stove with the steel brick of cast steel furnace throat of water-cooled, cooling medium (such as: water) press certain flow velocity passes through the band water-cooled from the lower port of the cooling water pipe 2 of the steel brick of cast steel furnace throat of band water-cooled steel brick of cast steel furnace throat inside, by this way, heat is passed to the steel brick matrix 1 of the steel brick of cast steel furnace throat of band water-cooled from metallurgy high temperature stove inside, cooling medium is taken heat out of the metallurgy high temperature stove from steel brick matrix 1 again, make the furnace shell of metallurgy high temperature stove avoid high temperature erosion, thereby prolong the service life of metallurgy high temperature stove.By regulating the cooling performance that cooling water flow and flow velocity come the steel brick of cast steel furnace throat of accommodation zone water-cooled.

The foregoing description does not limit the utility model in any form, and all employings are equal to the technical scheme that mode obtained of replacement or equivalent transformation, all drop in the protection domain of the present utility model.

Claims

1, a kind of steel brick of cast steel furnace throat with water-cooled, comprise steel brick matrix, cooling water pipe, it is characterized in that the material of described steel brick matrix and cooling water pipe all is a cast steel, steel brick matrix is a U-shaped, cooling water pipe is positioned at steel brick matrix, combine closely in the little molten mode in surface with steel brick matrix, stretch out from two ends of U-shaped steel brick matrix at its two ends.

2, the steel brick of cast steel furnace throat of band water-cooled according to claim 1, the cross section that it is characterized in that described cooling water pipe is for oval.

3, the steel brick of cast steel furnace throat of band water-cooled according to claim 2, the length ratio that it is characterized in that described cooling water pipe major axis and minor axis is 0.5～0.7.

4, the steel brick of cast steel furnace throat of band water-cooled according to claim 1 is characterized in that also being provided with protective casing on the outer surface of described cooling water pipe end.

5,, it is characterized in that described cooling water pipe is many according to the steel brick of cast steel furnace throat of each described band water-cooled of claim 1 to 4.

6, the steel brick of cast steel furnace throat of band water-cooled according to claim 1 is characterized in that also comprising positioning bolt hole and cross temperature hole.

7, the steel brick of cast steel furnace throat of band water-cooled according to claim 6 is characterized in that described positioning bolt hole is a plurality of.