CN201442974U

CN201442974U - Electroslag furnace crystallizer used for smelting rollers

Info

Publication number: CN201442974U
Application number: CN2009200261561U
Authority: CN
Inventors: 逄炯顺
Original assignee: Weifang Yadong Metallurgical Equipment Co Ltd
Current assignee: Weifang Yadong Metallurgical Equipment Co Ltd
Priority date: 2009-05-26
Filing date: 2009-05-26
Publication date: 2010-04-28
Anticipated expiration: 2019-05-26

Abstract

The utility model discloses an electroslag furnace crystallizer used for smelting rollers. The electroslag furnace crystallizer comprises an upper roller neck crystallizing monomer of a roller neck part used for smelting and crystallizing to form rollers, a roller body crystallizing monomer at the roller body part used for smelting and crystallizing to form rollers, and a lower roller neck crystallizing monomer of another roller neck part used for smelting and crystallizing to form rollers. The crystal monomers are piled up one by one from bottom to top during the smelting process, the upper roller neck crystallizing monomer is divided into two parts along the shaft line, the two parts are fixed together during the smelting, and the two parts are respectively provided with independent cooling water cavity. The crystallizer can produce rollers with the method of electroslag re-melting, which not only improves the material use rate and reduces production cost, but also has obvious superior quality over other cast products.

Description

Be used to smelt the crystallizer for electroslag furnace of roll

Technical field

The utility model relates to the crystallizer for electroslag furnace technical field, relates in particular to a kind of crystallizer for electroslag furnace that is used to smelt roll.

Background technology

Esr is a kind of secondary refining technology, the integrated metallurgical castingprocesses that the collection steel secondary refining combines with directional freeze.Its principle is that electric current passes through liquid slag scum thermal resistance, and with the metal electrode fusing, molten metal accumulates molten drop, passes slag blanket during drippage and enters metal pool, and crystallization and freezing becomes steel ingot in water mold then.Form the stage at the electrode tip drop, and drop passes the slag bath drippage stage, steel-slag fully contacts, and nonmetallic inclusionsin steel is absorbed by slag.Harmful element in the steel (sulphur, lead, antimony, bismuth, tin) is removed more effectively by steel-slag reaction and high-temperature gasification.Liquid metal has been avoided reoxidizing under slag bath covers basically.Because fusing, refining in the copper water mold, solidify, this has just stopped the pollution of refractory materials to steel.Before the ingot solidification, metal pool and slag bath are arranged, play insulation and feeding effect, guarantee the compactness of steel ingot in its upper end.The slag bath that rises forms the thin skull of one deck on the crystallizer inwall, not only make surface of steel ingot bright and clean, also plays insulation and heat-blocking action, and more heat is conducted to the bottom, helps steel ingot crystallographic orientation from bottom to top.Owing to above reason, the quality and the performance of the steel ingot of esr production are improved, and plasticity under the low temperature of steel alloy, room temperature and the high temperature and impelling strength strengthen, and steel prolong work-ing life.

The structure formation of roll as shown in Figure 1, it comprises the roll neck a1 that is positioned at two ends and is positioned at intermediary body of roll a2.The traditional manufacture method of roll blank is that circular steel ingot is forged into the roll blank, processes the roll that manufactures finished product with thermal treatment then.

Be difficult to remove pore, impurity and defective such as loose because the steel ingot crystal grain produced of common method for making steel is thick,, but still can influence roll work-ing life though above-mentioned defective makes moderate progress after forging.And the forging roller lumber recovery is lower, and the forging dop also will be stayed in two ends except that crop is big, and the surface stays process redundancy also bigger, and forging roller material use efficiency maximum can reach 70%.

Utility model people as the application, be devoted for years to design and manufacturing in crystallizer for electroslag furnace, have rich practice experience, through concentrating on studies of utility model people, creatively utilize the method for esr to produce the roll blank, not only improved the utilization ratio of material, reduced manufacturing cost, and quality also obviously is better than forging product.

Summary of the invention

Technical problem to be solved in the utility model is: a kind of crystallizer for electroslag furnace that is used to smelt roll is provided, this crystallizer can be made roll with the method for esr, not only improved the utilization ratio of material, reduced manufacturing cost, and quality also obviously is better than forging product.

For solving the problems of the technologies described above, the technical solution of the utility model is: be used to smelt the crystallizer for electroslag furnace of roll, comprise that is used to smelt the last roll neck crystalline monomer that also crystallization forms a roll neck part of roll; One is used to smelt the body of roll crystalline monomer that also crystallization forms the body of roll part of roll; One is used to smelt the following roll neck crystalline monomer that also crystallization forms another roll neck part of roll; Described crystalline monomer is stacked together when smelting from bottom to top one by one; Described each crystalline monomer includes an inner barrel and an outer cylinder body, and described inner barrel has surrounded the smelting space, has formed an airtight cooling water cavity between described inner barrel and the outer cylinder body; The described roll neck crystalline monomer of going up is split into two portions along axis, and described these two portions are fixed together when smelting, and have independently cooling water cavity separately on described these two portions.

After having adopted technique scheme, the beneficial effects of the utility model are: this crystallizer can be made roll with the method for esr, has not only improved the utilization ratio of material, reduced manufacturing cost, and quality also obviously is better than forging product.Moreover, when adopting the crystallizer of this structure to smelt, " progressively increasing " by crystallizer, can shorten the length of consumable electrode and dummy electrode greatly, thereby reduce the stroke up and down of electroslag furnace transverse arm, improve the stability of electroslag furnace transverse arm, reduce power loss, reduce the manufacturing cost and use cost of electroslag furnace.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the structural representation of roll;

Fig. 2 is a crystallizer for electroslag furnace of making roll shown in Figure 1;

Fig. 3 is a principle of work synoptic diagram of making roll shown in Figure 1 with crystallizer for electroslag furnace shown in Figure 2;

Among the figure: a. roll; A1. roll neck part; A2. body of roll part; 1. go up the roll neck crystalline monomer; 2. body of roll crystalline monomer; 3. descend the roll neck crystalline monomer; 4. consumable electrode; 5. slag bath; 6. metal pool; 7. end water tank.

Embodiment

Fig. 1 shows the structure of a kind of roll a, and it comprises the roll neck a1 that is positioned at two ends and is positioned at intermediary body of roll a2.The crystallizer for electroslag furnace that the utility model disclosed proposes around this roll.

Fig. 2 shows the crystallizer for electroslag furnace of making roll shown in Figure 1, and as shown in Figure 2, it comprises that is used to smelt the last roll neck crystalline monomer 1 that also crystallization forms a roll neck part of roll; One is used to smelt the body of roll crystalline monomer 2 that also crystallization forms the body of roll part of roll; One is used to smelt the following roll neck crystalline monomer 3 that also crystallization forms another roll neck part of roll; Described these crystalline monomers are stacked together when smelting from bottom to top one by one; Described each crystalline monomer includes an inner barrel and an outer cylinder body, and described inner barrel has surrounded the smelting space, has formed an airtight cooling water cavity between described inner barrel and the outer cylinder body; The described roll neck crystalline monomer 1 gone up is split into two portions along axis, and described these two portions are fixed together when smelting, and have independently cooling water cavity separately on described these two portions.

Fig. 3 shows the principle of work of making roll shown in Figure 1 with crystallizer for electroslag furnace shown in Figure 2:

At first, install each crystalline monomer.When roll is longer, will descend roll neck crystalline monomer 3 to be placed on the end water tank 7 earlier, when the ingot crystal moulding is full of roll neck crystalline monomer 3, put body of roll crystalline monomer 2 again, in like manner, put roll neck crystalline monomer 1 again.Its objective is,, can shorten the length of consumable electrode and dummy electrode greatly by " progressively increasing " of crystallizer, thereby reduce the stroke up and down of electroslag furnace transverse arm, improve the stability of electroslag furnace transverse arm, reduce power loss, reduce the manufacturing cost and use cost of electroslag furnace.When roll more in short-term, directly three crystalline monomers are stacked together up and down.

Then, carry out esr.Working current is added between consumable electrode 4 and the end water tank 7, slag thermal resistance by liquid slag bath 5, with consumable electrode 4 fusings, molten metal accumulates molten drop, pass slag bath 5 during drippage and enter metal pool 6, then, through the cooling of recirculated cooling water in the cooling water cavity, crystallization and freezing in smelting the space is made the roll blank.

At last, will go up roll neck crystalline monomer 1 and split into two portions, can take out the roll blank.

The roll blank of the crystallizer manufacturing that discloses with the utility model is compared with forging blank, effectively removed the gas in the blank, be mingled with and internal defect, need not reserve dop, the two ends crop is also very little, belong to the newly net forming technology, stock utilization can reach more than 85%. Moreover, when roll length is longer, in smelting process, crystallizer can " progressively increase ", thereby greatly shorten the length of consutrode and dummy electrode, reduce the up and down stroke of electroslag furnace transverse arm, improve the stability of electroslag furnace transverse arm, reduce power attenuation, reduce the manufacturing cost and use cost of electroslag furnace.

Claims

1. be used to smelt the crystallizer for electroslag furnace of roll, it is characterized in that: comprise

One is used to smelt the last roll neck crystalline monomer that also crystallization forms a roll neck part of roll;

One is used to smelt the body of roll crystalline monomer that also crystallization forms the body of roll part of roll;

One is used to smelt the following roll neck crystalline monomer that also crystallization forms another roll neck part of roll;

Described crystalline monomer is stacked together when smelting from bottom to top one by one;

Described each crystalline monomer includes an inner barrel and an outer cylinder body, and described inner barrel has surrounded the smelting space, has formed an airtight cooling water cavity between described inner barrel and the outer cylinder body;

The described roll neck crystalline monomer of going up is split into two portions along axis, and described these two portions are fixed together when smelting, and have independently cooling water cavity separately on described these two portions.