CN214640122U - Mullite central brick for die casting and capable of reducing molten steel scouring - Google Patents

Abstract

The utility model discloses a can reduce molten steel scouring's mullite center brick for die casting, including the central brick body, the central position department at central brick body top has seted up the pouring slot, and the bottom position intercommunication of pouring slot has second pouring cavity, and the water conservancy diversion hole that runs through central brick body outer wall is offered to angles such as the internal intermediate position department of central brick, and six water conservancy diversion hole top positions all are linked together with the bottom position of second pouring cavity, and pouring slot inner chamber is provided with the pouring plug that runs through pouring slot top position, and the top position fixed mounting of pouring plug has the connection brick body. The mullite central brick for die casting capable of reducing molten steel scouring reduces erosion of molten steel flow beams to a central brick body in the die casting process, is beneficial to controlling fluctuation of a casting liquid level in the molten steel casting process, reduces contact time of the molten steel with the die casting brick, ensures stability of the casting process, aims to reduce steel ingot inclusion or slag inclusion defects caused by erosion of the die casting brick, and improves steel ingot quality.

Description

Mullite central brick for die casting and capable of reducing molten steel scouring

Technical Field

The utility model relates to a resistant firebrick technical field specifically is a mullite central brick for die casting that can reduce molten steel scouring.

Background

At present, the central brick for pouring used by domestic special steel die casting is in accordance with the industrial standard, the general inner diameter is phi 90mm, the material is mostly clay, the traditional central brick for pouring can basically meet the use requirements of people, but still has certain problems, and the concrete problems are as follows:

at present, most of central bricks for pouring in the market cannot meet the requirements of part of special steel due to the materials and have defects in structural design, so that overlarge impact force of molten steel in the pouring process continuously erodes the weak part of the central brick, and further, the phenomenon that residues between two adjacent diversion holes are easily eroded by the molten steel, so that the eroded residues enter an ingot mold along with the molten steel to form a steel ingot slag inclusion defect is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a mullite central brick is used to die casting that can reduce molten steel scouring to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a can reduce mullite center brick for die casting of molten steel scouring, includes the central brick body, the central position department at central brick body top has seted up the pouring slot, the bottom position intercommunication of pouring slot has second pouring cavity, the water conservancy diversion hole that runs through central brick body outer wall is seted up to the internal intermediate position department isogonism of center brick, and six water conservancy diversion hole top positions all are linked together with the bottom position of second pouring cavity, pouring slot inner chamber is provided with the pouring plug that runs through pouring slot top position, the top position fixed mounting of pouring plug has the connection brick body, the central position department at connection brick body top has seted up the pouring fore-set, the first pouring cavity that runs through the connection brick body and pouring plug is seted up to pouring fore-set bottom position.

Preferably, in the mullite central brick for die casting, which can reduce molten steel scouring, the central brick body is made of mullite.

Based on the technical characteristics, the mullite refractory brick is convenient to utilize the excellent refractory property of mullite and has the advantages of uniform expansion, excellent thermal shock stability, high refractoriness under load, small high-temperature creep value, high hardness and good chemical corrosion resistance.

Preferably, in the mullite central brick for die casting, which can reduce molten steel scouring, the cross section of the central brick body is regular hexagon, and the six groups of flow guide holes are respectively and vertically distributed with the side wall of the central brick body.

Based on the technical characteristics, the rapid pouring is convenient.

Preferably, in the mullite central brick for die casting, which can reduce molten steel scouring, the inner diameter of the first casting cavity is the same as that of the second casting cavity, and the inner diameter of the first casting cavity is 120 mm.

Based on the technical characteristics, the contact time of molten steel with the die-cast brick is conveniently reduced, the strong heat flow of the molten steel is prevented from scouring and eroding the central brick body, and the stability of the pouring process is ensured.

Preferably, in the mullite central brick for die casting, which can reduce molten steel scouring, the physicochemical indexes of the central brick body are as follows: al2O3 is more than or equal to 62 percent, Fe2O3 is less than or equal to 1.7 percent, the refractoriness is more than or equal to 1700 ℃, the apparent porosity is less than or equal to 26 percent, the normal-temperature compressive strength is more than or equal to 28Mpa, the thermal stability is more than or equal to 10At (1100 ℃), and the impact thermal expansion rate is-0.1-0.4 percent of At (1500 ℃ 2 h).

Based on the technical characteristics, the erosion of molten steel flow beams to the central brick body in the die casting process is convenient to reduce.

Preferably, in the mullite central brick for die casting, which can reduce molten steel scouring, the distance value between the adjacent sides of the six groups of the diversion holes is 11 mm.

Based on the technical characteristics, the contact time of molten steel with the die-cast brick is conveniently reduced, the strong heat flow of the molten steel is prevented from scouring and eroding the central brick body, and the stability of the pouring process is ensured.

Preferably, in the mullite central brick for die casting, which can reduce molten steel scouring, a pluggable mechanism is formed between the pouring plug and the pouring slot.

Based on the technical characteristics, the disassembly and the assembly are convenient.

Compared with the prior art, the beneficial effects of the utility model are that:

through the design of this technical scheme, alleviate the erosion of molten steel flow bundle to the central brick body among the die casting process, be favorable to controlling the molten steel pouring liquid level fluctuation in the casting process, guarantee that the liquid level is steady, reduce the molten steel in the contact time with the die casting brick, prevent the strong thermal current of molten steel from the erodeing of central brick body and eroding, guarantee the stability of casting process, aim at reducing because the steel ingot that the die casting brick is corroded and cause is mingled with or presss from both sides the sediment defect, improve the steel ingot quality, reduce the steel ingot because of inclusion or the inclusion waste product that the casting process produced.

Drawings

FIG. 1 is a front view of the cross-sectional structure of the present invention;

FIG. 2 is a schematic top view of the central brick of the present invention;

FIG. 3 is a schematic top view of the center brick of the present invention;

fig. 4 is a schematic view of the top view structure of the connection brick of the present invention.

In the figure: 1. connecting the brick body; 2. a first casting cavity; 3. pouring a plug; 4. a second casting cavity; 5. a central brick body; 6. a flow guide hole; 7. pouring the slot; 8. and (4) pouring a top opening.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides an embodiment: the utility model provides a can reduce mullite center brick for die casting of molten steel scouring, including the central brick body 5, pouring slot 7 has been seted up to the central position department at the 5 tops of the central brick body, the bottom position intercommunication of pouring slot 7 has second pouring cavity 4, the equal angle of 5 inside intermediate position departments of the central brick body has seted up the water conservancy diversion hole 6 that runs through 5 outer walls of the central brick body, and six water conservancy diversion hole 6 top positions of organizing all are linked together with the bottom position of second pouring cavity 4, 7 inner chambers of pouring slot are provided with the pouring plug 3 that runs through 7 top positions of pouring slot, the top position fixed mounting of pouring plug 3 has connecting brick body 1, the central position department at connecting brick body 1 top has seted up pouring fore-stock 8, pouring fore-stock 8 bottom positions have seted up the first pouring cavity 2 that runs through connecting brick body 1 and pouring plug 3.

Please refer to fig. 1 in the drawings of the specification: the central brick body 5 is made of mullite.

Please refer to fig. 2 and 3 in the drawings of the specification: the cross section of the central brick body 5 is in a regular hexagon shape, and six groups of guide holes 6 are respectively and vertically distributed with the side wall of the central brick body 5.

Please refer to fig. 1 in the drawings of the specification: the inner diameter of the first casting cavity 2 is the same as that of the second casting cavity 4, and the inner diameter of the first casting cavity 2 is 120 mm.

Please refer to fig. 1 in the drawings of the specification: the physicochemical indexes of the central brick body 5 are as follows: more than or equal to 62 percent of Al2O3, less than or equal to 1.7 percent of Fe2O3, more than or equal to 1700 ℃ of refractoriness, less than or equal to 26 percent of apparent porosity, more than or equal to 28Mpa of normal-temperature compressive strength, more than or equal to 10At1100 ℃ of thermal stability, and-0.1-0.4 percent of baking thermal expansion At1500 ℃ for 2 h.

Please refer to fig. 1 and 3 in the drawings of the specification: the spacing value of the adjacent sides of the six groups of the diversion holes 6 is 11 mm.

Please refer to fig. 1 in the drawings of the specification: a pluggable mechanism is formed between the pouring plug 3 and the pouring slot 7.

The working principle is as follows: when the mullite central brick for die casting capable of reducing molten steel scouring is used, the connecting brick body 1 is firstly placed at the upper position of the central brick body 5, the pouring plug 3 extends into the inner cavity of the pouring slot 7, then molten steel is poured into the inner cavity of the first pouring cavity 2 through the pouring top opening 8 and flows into the inner cavities of the six groups of the diversion holes 6 through the first pouring cavity 2, the pouring slot 7 and the second pouring cavity 4 under the action of gravity and flows into the die-cast brick to complete pouring, so that the corrosion of molten steel flow beams to the central brick body 5 in the die casting process is conveniently reduced, the fluctuation of the pouring liquid level in the molten steel pouring process is favorably controlled, the liquid level is ensured to be stable, the contact time of the molten steel with the die-cast brick is reduced, the scouring and corrosion of strong heat flow of the molten steel to the central brick body are prevented, the stability of the pouring process is ensured, and the defects of steel ingots or slag inclusion caused by the die-cast brick erosion are reduced, improve the steel ingot quality, reduce the steel ingot because of the inclusion or the slag inclusion waste product that the pouring process produced, do above the utility model discloses a whole theory of operation.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not exhaustive and do not limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims (6)

1. The utility model provides a can reduce mullite center brick for die casting of molten steel erodees, includes central brick body (5), its characterized in that: a pouring slot (7) is arranged at the central position of the top of the central brick body (5), the bottom of the pouring slot (7) is communicated with a second pouring cavity (4), the middle position inside the central brick body (5) is provided with a diversion hole (6) which runs through the outer wall of the central brick body (5) at an equal angle, the top positions of the six groups of flow guide holes (6) are communicated with the bottom position of the second casting cavity (4), the inner cavity of the pouring slot (7) is provided with a pouring plug (3) which penetrates through the top of the pouring slot (7), the top of the pouring plug (3) is fixedly provided with a connecting brick body (1), a pouring top opening (8) is arranged at the central position of the top of the connecting brick body (1), the bottom of the pouring top opening (8) is provided with a first pouring cavity (2) which is connected with the brick body (1) and the pouring plug (3) in a penetrating mode.

2. The mullite core brick for die casting capable of reducing molten steel scouring as claimed in claim 1, wherein: the central brick body (5) is made of mullite.

3. The mullite core brick for die casting capable of reducing molten steel scouring as claimed in claim 1, wherein: the cross section of the central brick body (5) is in a regular hexagon shape, and six groups of guide holes (6) are respectively and vertically distributed with the side wall of the central brick body (5).

4. The mullite core brick for die casting capable of reducing molten steel scouring as claimed in claim 1, wherein: the inner diameter of the first pouring cavity (2) is the same as that of the second pouring cavity (4), and the inner diameter of the first pouring cavity (2) is 120 mm.

5. The mullite core brick for die casting capable of reducing molten steel scouring as claimed in claim 1, wherein: the distance value between the adjacent sides of the six groups of the diversion holes (6) is 11 mm.

6. The mullite core brick for die casting capable of reducing molten steel scouring as claimed in claim 1, wherein: a pluggable mechanism is formed between the pouring plug (3) and the pouring slot (7).

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