CN108913847A - A kind of production method of ladle anti-gas-leak air brick - Google Patents

Abstract

The invention discloses a kind of ladle production methods of anti-gas-leak air brick, first firing air brick core, are welded the outer steel shell of centrum, and air brick core is pressed into outside centrum in steel shell after Drying and cooling, welding circular cover and ventilation tail pipe；Steel shell space outside certain distance welds enhancement layer steel shell outside centrum, and it is welded together with circular cover, then puts it into ventilating seat brick mold；With production air brick core prefabricated material filling centrum outer steel shell and enhancement layer steel shell between gap in and vibratory compaction；Jolt ramming is filled into the gap between enhancement layer steel shell and ventilating seat brick mold with brick cup prefabricated material, obtains integral air brick.Test proves, under comparable operating conditions, the anti-gas-leak air brick made of the present invention, more original 30 times of ventilative inner core access times are increased to 40 times, porous core is prevented because fracture and gas leakage shift to an earlier date offline phenomenon, the service life for extending air brick ensure that the safe operation of ladle, increase benefit for enterprise.

Description

A kind of production method of ladle anti-gas-leak air brick

Technical field

It is saturating more particularly, to a kind of ladle anti-gas-leak the present invention relates to the ladle that molten steel is accepted by steel mill, Foundry Works The production method of gas brick.

Background technique

Air brick is the functional product of ladle, and key effect is played during smelting molten steel, its main work With being the blowing argon gas into ladle, ingredient and temperature in molten steel is set to reach a balanced state, moreover it is possible to make steel in steelmaking process The reaction product of slag and refractory material floats, and improves the cleannes of molten steel, guarantees that the refining of molten steel reaches required standard.Work When, molten steel deteriorates to the melting loss that air brick working lining carries out with caused physics is peeled off, and steel slag and molten steel are to saturating in smelting process Chemical erosion caused by the lasting infiltration of gas brick and thermal shock, the thermal stress of temperature etc. be cause air brick damage it is most main Want reason, these reasons can lead to air brick ventilative inner core occur fracture, airflow channel be blocked etc., occur gas blowby, from Disconnected phenomena such as meeting middle deflation, cause ladle improper offline, it is serious or even safety accident occur, cause immeasurable damage It loses.

For the service life for extending air brick, air brick is also constantly being improved at present, but be mostly from material side Face is set about, and such as under the premise of meeting refinery practice, selects excellent additive, to improve the shock resistance of material, or research and development New sintering process prepares the air brick with property.But does not have also and changed in terms of the physical structure of air brick Into example.

Summary of the invention

The purpose of the present invention is to provide a kind of ladle production method of anti-gas-leak air brick, to air brick from physics knot It is improved on structure, to reach the technical effect prolonged its service life.

To achieve the above object, the present invention can take following technical proposals：

The production method of ladle anti-gas-leak air brick of the present invention includes the following steps：

The first step pours into prefabricated material in air brick core mold, by demoulding after vibration moulding, dry condensation, in drying box After drying, it is spare that loading high temperature kiln is fired into finished product air brick core；

Second step is welded the outer steel shell of centrum of cladding air brick core according to the air brick core size that the first step is burnt into；Then in vertebra External steel shell inner wall uniformly applies one layer of chamotte slurry, and air brick core is pressed into outside centrum in steel shell；It is sent in drying hole and dries again Taken out after dry, it is cooling after outside centrum the circular cover of steel shell top throat thickness 5mm and ventilation tail pipe；

Third step, 20 ~ 40mm of steel shell space outside distance welding enhancement layer steel shell, the enhancement layer steel shell pass through top outside centrum Fixing muscle and the circular cover on the outer steel shell top of centrum weld together, and cone is formed between centrum outer steel shell and enhancement layer steel shell Then shape ring cavity is put it into ventilating seat brick mold；

4th step, and vibratory compaction intracavitary with the prefabricated material filling conical ring of first step production air brick core；

Gap between enhancement layer steel shell and ventilating seat brick mold is filled jolt ramming with the prefabricated material of brick cup, obtains entirety by the 5th step Air brick.

The advantage of the invention is that one layer of enhancement layer steel shell is added outside the steel shell of the ventilative inner core of former taper brick body, two layers The jolt ramming of air brick core material is used between steel shell, using after a certain period of time, if fracture gas leakage occurs in ventilative inner core, steel shell adds Strong layer can play the role of protective layer, and protection air-flow will not be spread, and still can guarantee that air-flow is unimpeded.Test proves, same Under operating condition, using the anti-gas-leak air brick that makes of the present invention, more original 30 times of ventilative inner core access times are increased to 40 It is secondary, prevent porous core because fracture and gas leakage shift to an earlier date offline phenomenon, has extended the service life of air brick, ensure that ladle Safe operation increases benefit for enterprise.

Detailed description of the invention

Fig. 1 is air brick core structure chart.

Fig. 2 is the air brick core structure chart with the outer steel shell of centrum.

Fig. 3 is the air brick core structure chart with enhancement layer steel shell.

Fig. 4 is the top view of Fig. 3.

Fig. 5 is finished product air brick outline drawing.

Specific embodiment

More detailed explanation is done to the present invention with reference to the accompanying drawing.

The production method of ladle anti-gas-leak air brick of the invention includes the following steps：

The first step pours into prefabricated material in air brick core mold, by demoulding after vibration moulding, natural drying condensation, in drying It is dry in case（300℃）Afterwards, 1620 DEG C of high temperature kiln are packed into and are fired into that finished product air brick core is spare, the shape of finished product air brick core 1 As shown in Figure 1；

Second step is welded the outer steel shell 2 of centrum of cladding air brick core according to the air brick core size that the first step is burnt into；Then exist The inner wall of the outer steel shell 2 of centrum uniformly smears one layer of dilute chamotte slurry, and by air brick core 1 using steel shell 2 outside case pressing machine indentation centrum It is interior；Taken out after being sent in drying hole 200 DEG C of drying again, it is cooling after outside centrum 2 top of steel shell（It is relatively large in diameter end）Welding The circular cover 3 and ventilation tail pipe 4 of thickness 5mm, as shown in Figure 2；

Third step, the 2 space outside 25mm of steel shell outside centrum（It, according to the actual situation, can be in 20 ~ 40mm range when actual fabrication Inside it is adjusted）Distance welding enhancement layer steel shell 5, the enhancement layer steel shell 5 pass through top fixing muscle 6 and outer 2 top of steel shell of centrum Circular cover 3 weld together（Fixing muscle 6 can be used three, and equilibrium is welded on enhancement layer steel shell 5 and circular cover 3）, Taper ring cavity 7 is thus formed between centrum outer steel shell 2 and enhancement layer steel shell 5, as shown in Figure 3；Then it puts it into ventilative In brick cup mold 8, at this point, the lesser bottom of diameter is fixed on the bottom plate of ventilating seat brick mold 8, it is pre- when avoiding being poured in next step Stream processed goes out, as shown in Figure 4；

4th step, in prefabricated material filling taper ring cavity 7 identical with first step production 1 ingredient of air brick core and vibratory compaction；

Jolt ramming is filled with the prefabricated material of brick cup, into drying in gap between enhancement layer steel shell 5 and ventilating seat brick mold 8 by the 5th step Finished product entirety ventilating seat brick is obtained after kiln drying is dry, finished product ventilating seat brick shape is as shown in Figure 5.When being delivered according to customer requirement, Ventilation tail pipe 4 covers nozzle with leather sheath, other sundries is prevented to be mixed into, and when use opens.

Claims (1)

1. a kind of ladle production method of anti-gas-leak air brick, it is characterised in that：Include the following steps：

The first step pours into prefabricated material in air brick core mold, by demoulding after vibration moulding, dry condensation, in drying box After drying, it is spare that loading high temperature kiln is fired into finished product air brick core；

Second step is welded the outer steel shell of centrum of cladding air brick core according to the air brick core size that the first step is burnt into；Then in vertebra External steel shell inner wall uniformly applies one layer of chamotte slurry, and air brick core is pressed into outside centrum in steel shell；It is sent in drying hole and dries again Taken out after dry, it is cooling after outside centrum the circular cover of steel shell top throat thickness 5mm and ventilation tail pipe；

Third step, 20 ~ 40mm of steel shell space outside distance welding enhancement layer steel shell, the enhancement layer steel shell pass through top outside centrum Fixing muscle and the circular cover on the outer steel shell top of centrum weld together, and cone is formed between centrum outer steel shell and enhancement layer steel shell Then shape ring cavity is put it into ventilating seat brick mold；

4th step, and vibratory compaction intracavitary with the prefabricated material filling conical ring of first step production air brick core；

Gap between enhancement layer steel shell and ventilating seat brick mold is filled jolt ramming with the prefabricated material of brick cup, obtains entirety by the 5th step Air brick.