CN1200966A

CN1200966A - Technology for producing perforated plate spare components such as pouring basket lid etc. using waste molten steel

Info

Publication number: CN1200966A
Application number: CN 98113713
Authority: CN
Inventors: 仪明信; 仪修真
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-01-09
Filing date: 1998-01-09
Publication date: 1998-12-09
Anticipated expiration: 2018-01-09
Also published as: CN1077817C

Abstract

The present invention discloses a casting process for producing pouring basket cover by using waste molten steel in steel works. Said casting process includes mold-making, mold-stoving and casting procedures. Its mold-making procedure is as follows: using sheet steel to make frame according to the external form of pouring basket; building up firebricks into heat-insulating layer along the internal side of the frame; finally, leveling by applying refractory clay, and for its upper U-shaped ring hole, a U-shaped mold with heat-insulating layer is made up. It features simple technological process, convenient mold-stoving procedure and low cost, etc..

Description

Utilize waste molten steel to produce plate hole class spare part technologies such as middle clad

The present invention relates to a kind of casting technique, is to utilize waste molten steel to produce plate hole class spare part technologies such as middle clad in the steel mill steelshop.

With middle clad is example, at steel mill, the production of middle clad is to carry out " pit casting " in the machine casting workshop under it, promptly in foundry, press the grooving on the spot of middle clad profile, build in fact, smear refractory material, its shortcoming is the moulding complexity, the integer difficulty, drying time is long, cost is high, very flexible, can't directly utilize the steel-making waste molten steel to cast.

The object of the invention provides a kind of steel-making scene that adapts to and utilizes waste molten steel to cast and plate hole class spare part technologies such as middle clad with low cost on the spot.

The present invention seeks to realize like this; Utilizing waste molten steel to produce the tundish cover process comprises; Make base, dry by the fire tire, casting.Make base main steel plate (mainly being waste and old steel plate) or the cast steel of adopting by middle clad shape fabricating frame, lay out refractory brick along scuncheon and between baffle plate and brick, clog the tamping sand material mixture with baffle plate more afterwards, form heat insulation layer.Also can adopt the levelling of claying material.To the U-loop hole on the middle clad, make the U type tire of band heat insulation layer.Casting mainly be utilize steel-making on-the-spot melt down steel or waste molten steel transfers casting.It is on-the-spot that the casting pattern of making is placed in steel-making in advance, once there is waste molten steel to produce, promptly transfers casting, and avoided leaking useless.

Below in conjunction with accompanying drawing the present invention is described in further detail:

Fig. 1 is middle clad structure diagram;

Fig. 2 is middle clad casting die structure sketch.

Referring to Fig. 1, middle clad is a slab construction, and the hanger 1 for lifting is arranged all around, and the centre has to be had on baking hole 2, one side for rod hole 3, Ansai.

Referring to Fig. 2, the casting technique of middle clad is;

(1) makes base; Behind the shop fixtures, adopt waste and old steel plate to be welded into frame 4,, spread 6 levellings of mud face along its inboard shop one deck refractory brick 5.Refractory brick 5 also can in groove, form permanent heat insulation layer with brick, reusable (figure slightly) by at frame 4 inboard welding brick-inlaid grooves.Filling tamping sand material mixture is made the production efficiency height between also available baffle plate of the dirty sand of refractory brick 5 inboards and the brick.The U type tire in casting stopper hole 3 is made up of inside and outside steel loop frame 7,8, and the centre is full of refractory clay and makes heat insulation layer.Gap annular distance 3, inner ring frame 7 cards are set on the frame 4, add drift 9 stretchings.Tight, its limit end is tight by 17 of bolt clamps by bolt clamp 10 for outer shroud frame 8.To annular distance 2 in the dish, inner ring frame 11 be the two halves symmetrical structure, joint by bolt 12 on, add drift 13 stretchings therebetween, outer shroud frame 14 at joint by bolt 15 tightly, the centre is propping iron also.Adopt this U type tire reusable.The also available refractory brick of the ring-like tire of U directly smeared by type pendulum form, dose dry sand (figure slightly) in the middle of it.Adopt the garden steel to cut weldering to hanger 1 and form, directly pendulum becomes one after the casting at frame 4 each position.

Carcass frame (frame) also can be divided into several sections, goes up refractory brick and the permanent fetalism of the fixing formation of carcass for every section.Time spent is combined into the regulation shape with each section, with the jig chucking, forms whole carcass.Its advantage is without the claying material, and the fast workpiece of making base retracts conveniently.

(2) baking tire; Smear because of pug is thick in a large number, only simply toast and treat that dried slightly adult is removable outer shroud frame 8,14 with on-the-spot coal gas

(3) casting; The tire groove that makes is placed near the steel-making scene, meet waste molten steel and produce, can transfer casting.If direct pouring that the steel temperature is low, the stream that looses can be uncapped greatly also can be added a cover on fetal membrane by cast gate and be cast.Can be by middle clad of a cast gate casting, also can to add the stream basin on it and temperature raising oxygen rifle is cast simultaneously to the loose tool that keeps flat more than two by a main cast gate, also can cast simultaneously to the loose tool that stacks more than two or casting at interval (being that the same loose tool of multilayer ladder type accumulation casting adds dowel this moment in the casting chamber) by a main cast gate so that repeatedly casting fuses.Above-mentioned casting technique also can be used for using in the foundry of machinery plant, also is applicable to plate hole class spare part productions such as fritter steel ingot, geared wheel.Whole loose tool places on the pallet of being with heat insulation layer is convenient to handling.

Advantage of the present invention and good effect are; 1, moulding is simple. Adopt frame to add to lay bricks and can finish moulding, Low to the requirement of skilled worker's technical merit, the useless Modeling Material of consumption is few, the production efficiency height. 2, the baking tire is convenient. Because of loose tool Claying layer in surface is thin, utilizes on-the-spot coal gas to dry. 3, cost is low. Directly advance with steel-making steel scrap in site water The row casting, specially smelting molten steel casting, also because the cost of making base is low, thus the time saving and energy saving tundish that reduced The production cost of lid is reduced to former 1/6 cost approximately. 4, with the direct conversion product of steel mill's waste molten steel, avoided Put, improved the environment of plant because the waste molten steel generation causes steel scrap size block, sheet to huddle, reduce consuming, fall Low steel-making cost is beneficial to enterprise and strengthens management.

Claims

1, a kind of waste molten steel that utilizes is produced plate hole class spare part technologies such as middle clad, comprise and make base, dry by the fire tire, casting, it is characterized in that described making base is to adopt steel plate or cast steel to make frame by middle clad profile, lay out refractory brick along scuncheon and between baffle plate and brick, clog tamping sand material mixture formation heat insulation layer afterwards again, also can be directly with the levelling of silt particle material on the brick face, to the U-loop hole on the middle clad, make the ring-like tire of U of band heat insulation layer.

2, produce plate hole class spare part technologies such as middle clad according to the described waste molten steel that utilizes of claim 1, its characteristics are that the heat insulation layer in the frame is permanent heat insulation layer, and the brick-inlaid groove of promptly burn-oning in frame is with fire-resistant brick in groove.

3, produce plate hole class spare part technologies such as middle clad according to claim 1 or the 2 described waste molten steels that utilize, its characteristics are that described U type tire is made up of inside and outside steel loop frame, the centre is full of fire-resistant mixed sand and makes insulating barrier, gap annular distance inner ring frame card is set on the frame, add the wedge stretching, outer shroud edge end is fixing by bolt and frame chucking; To annular distance in the dish, inner ring frame is the two halves symmetrical structure, joint by bolt on, propping iron in the middle of it, the outer shroud frame joint by bolt on propping iron in the middle of it.

4, according to claim 1 or 2 described utilize waste molten steels produce in the middle of plate hole class spare part technology such as clad, it is characterized in that the ring-like tire of described U is smeared by the refractory brick pendulum to form middle filling dry sand.

5, produce plate hole class spare part technologies such as middle clad according to the described waste molten steel that utilizes of claim 3, it is characterized in that described casting can cast to the fetal membrane that keeps flat more than two simultaneously by a main cast gate, also can cast simultaneously to the loose tool that stacks more than two or casting at interval by a main cast gate.

6, produce plate hole class spare part technologies such as middle clad according to the described waste molten steel that utilizes of claim 5, it is characterized in that carcass frame (frame) is divided into several sections, go up refractory brick and the permanent fetalism of the fixing formation of carcass for every section, time spent is combined into the regulation shape with each section, with the jig chucking, form whole carcass.