CN202182615U - Combined furnace cover of electric arc furnace - Google Patents

Abstract

The utility model relates to a combined furnace cover of an electric arc furnace. The combined furnace cover comprises a small furnace cover at the top of the furnace and a surrounding furnace cover, wherein the small furnace cover at the top of the furnace comprises an electrode hole; a hook is pre-embedded in the small furnace cover at the top of the furnace; the surrounding furnace cover comprises 12 equant parts which are manufactured into preformed parts and then assembled; and therefore, the structure is convenient for directly replacing the small furnace cover at the top of the furnace on line to ensure that the surrounding furnace cover can be used to the limit state. Compared with a traditional furnace cover built by combining phosphate with high-alumina bricks, the combined furnace cover of the electric arc furnace has the advantages of long comprehensive life, convenience in building, easiness for replacing, simple production process and low production energy consumption.

Description

A kind of combined type electric arc stove bell

Technical field

The utility model relates to the furnace roof equipment of short flow process steel-making with electric arc furnaces, especially a kind of comprehensive life height, convenient building, the prefabricated component formula bell that is easy to change.

Background technology

At present, steel-making is adopted two kinds of structures with the electric arc furnaces bell: the first, and the water-cooled coil structures, steel fibre enhancing corundum-mullite or other type fireproof prefabricated adopted in this structure furnace roof trigonum; The second, whole bell combines high-alumina brick to build by laying bricks or stones spherical in shape by phosphate.First kind of version of the general employing of large-scale electric furnace or uhp electric arc furnace; Yet; The bell that phosphate combines high-alumina brick to build by laying bricks or stones is also commonplace at home, and the utility model provides a kind of bell with individual features, structure to second kind of bell, and selects corresponding refractory material for use.

It is to form through mixing, compression moulding, 600 ℃ of-800 ℃ of bakings with raw materials such as high alumina, clay, phosphate binders that phosphate combines high-alumina brick.The electric furnace top was developed into present ring gradually by former " herringbone " block method and is built method; The ring block very useful brick draft internation standard of method electric furnace (ISO/DP 5019/5) has been stipulated H series, the brick that J is serial and K is serial three types; The length of brick (or furnace roof thickness) is respectively 230mm, 250mm, 300mm; Also need manual processing when building by laying bricks or stones, the time of building by laying bricks or stones is longer.

It is exactly the electrode hole zone that bell is prone to impaired position; Mainly receive electrode high temperature melting loss, inner flue gas of the stove wash away and the erosion of erosion, slag etc. influences; After using to a certain degree; Brick around the electrode hole can become flexible gradually, come off, and follows whole bell and just scraps, and all roof bricks are also discarded.Because relatively poor with brick bell globality of building, therefore, in case the part break down, also can occur around it unusual, can't operate as normal, thus whole bell has just used terminal point.

Damage situation through analyzing discarded each position of bell finds that the roof brick loss at other position is less except that the electrode hole zone.

Summary of the invention

For solving the deficiency that traditional brick bell comprehensive life is low, build inconvenience, frequent change and serious waste by laying bricks or stones; The utility model provides a kind of bell; Not only use on electric arc furnaces more easily, and improved the comprehensive life of bell, avoided frequent replacing bell.

In order to achieve the above object, the technical scheme that the utility model adopted is:

1, the drawing of brick bell is converted into the drawing with the prefabricated component assembling, bell by the little bell of furnace roof and on every side bell two parts constitute, the little bell of furnace roof comprises electrode hole, the furnace roof port covers pre-buried suspension hook; Simultaneously, the bell five equilibrium is considered to make and installation situation on every side, is divided into 12 parts generally speaking, and therefore, bell is made up of 12 parts of five equilibrium on every side.During conversion, bell height and furnace inner space can not be made too big change, and the operation thickness of the little bell of furnace roof suitably increases, and the operation thickness of bell needs suitably to increase gradually on every side.

2, make furnace roof port lid prefabricated component and bell prefabricated component on every side respectively, manufacturing process is identical with common prefabricated component.

3, build bell prefabricated component on every side on the bell steel construction by laying bricks or stones through being supported on, build furnace roof port lid on every side after bell is built by laying bricks or stones and finished by laying bricks or stones.

4, can the little bell of online direct replacing furnace roof after the lid damage of furnace roof port, bell need not to change on every side, when bell can't be worked really on every side, changes again.

The beneficial effect of the utility model is: combine high-alumina brick to compare with phosphate; The making of prefabricated component is convenient, succinct, do not need equipment such as brick machine, and baking temperature is low; Prefabricated component only need toast 250 ℃ and get final product, and phosphate combines high-alumina brick need toast more than 600 ℃; Building by laying bricks or stones than roof brick of prefabricated component built by laying bricks or stones simply, and the speed of building by laying bricks or stones is faster, reduced the work on the spot amount, and improved efficient; Can make each position of bell reach peak work capacity through changing the little bell of furnace roof during use, avoid waste, and continuing of having promoted to smelt carries out.Therefore, the utlity model has comprehensive life height, convenient building, be easy to local replacing, production technology is simple, energy consumption is low advantage.

Description of drawings:

Fig. 1: brick bell vertical view;

Fig. 2: A-A-A cutaway view among Fig. 2;

Fig. 3: the vertical view after the bell assembling is accomplished;

Fig. 4: B-B-B cutaway view among Fig. 3;

Fig. 5: furnace roof port lid prefabricated component vertical view;

The C-C-C cutaway view of Fig. 6: Fig. 5;

Fig. 7: the five equilibrium Later Zhou Dynasty, one of the Five Dynasties sits around a fire and covers the prefabricated component vertical view;

The D-D view of Fig. 8: Fig. 7;

Fig. 9: the back of bell prefabricated component combination on every side vertical view;

The E-E view of Figure 10: Fig. 9.

Among the figure 1.: the bell steel ring; 2.: the little bell of furnace roof; 3.: bell on every side; 4.: suspension hook; 5.: electrode hole.

The specific embodiment

With former bell thickness is that 230mm is that example describes:

1, press Fig. 3 and shown in Figure 4, carry out the drawing conversion: chain-dotted line is former brick bell profile among Fig. 4.The lower surface of the little bell of furnace roof is through the P point, and some P is the intersection point after electrode hole bus and former brick bell lower surface are cut open.The length K span is 140mm-180mm, and angle [alpha] is got 75 °-80 °, and the thickness H of little bell decides with the length of brick according to brick bell, and H got 280mm-300mm when brick length was 230mm; H got 300mm-320mm when brick length was 250mm; H got 330mm-360mm when brick length was 300mm.Bell is identical with the thickness of roof brick at the thickness L at bell steel ring place on every side; Q gets 30mm-50mm among Fig. 4, and the arc at R1 place is through some W and put R, and; Sagitta is got 30mm-40mm, and the point that just is positioned among Fig. 4 on the arc of R1 place is 30mm-40mm apart from the maximum normal distance of straight line WR.The arc at R2 place is through some T and some S, and sagitta is got 20-30mm.H1 can not be too big among Fig. 4, generally is controlled at below the 50mm or according to the furnace roof space to confirm that bell generally is divided into 12 parts on every side.

Value is following in the present embodiment: K=150mm, and α=75 °, H=300mm, Q=50mm, sagitta 1 is got 35mm, and sagitta 2 is got 25mm.

2, make the little bell of furnace roof 3. prefabricated component of bell 2. and on every side respectively by Fig. 5, Fig. 6, Fig. 7, Fig. 8, the selection of preform material is following:

2. the little bell of furnace roof uses pours

3. bell uses pours on every side

The manufacture craft of bell prefabricated component is identical with manufacture craft, the process of general prefabricated component with process, and 4. the furnace roof port covers needs pre-buried suspension hook.

3, will around bell 3. prefabricated component be assembled in the bell steel ring by Fig. 9 and 1. go up.

4, with the little bell of furnace roof 2. by shown in Figure 3 place after the assembling around bell 3. above, need position 5., keeper electrode hole during assembling.

5, whole bell sling above 1. from the bell steel ring is installed in the electric furnace corresponding site.

6, generally speaking, 2. 3. bell can join 4 little bells of furnace roof around the cover, therefore, after 2. the little bell of furnace roof is damaged, can onlinely directly change.

Claims (3)

1. combined type electric arc stove bell is characterized in that: bell by the little bell of furnace roof and on every side bell two parts constitute, the little bell of furnace roof comprises electrode hole, the furnace roof port covers pre-buried suspension hook.

2. a kind of combined type electric arc stove bell according to claim 1 is characterized in that: bell is made up of 12 of five equilibrium on every side.

3. a kind of combined type electric arc stove bell according to claim 1 is characterized in that: the little bell of furnace roof and on every side bell be prefabricated component.

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