CN201380284Y

CN201380284Y - Double-layered slit permeable brick for bottom-blowing, powder-injecting and dephosphorizing

Info

Publication number: CN201380284Y
Application number: CN200920035990U
Authority: CN
Inventors: 郭振和; 邹宗树; 李玉华; 罗志国; 李明阳
Original assignee: Shanghai Meishan Iron and Steel Co Ltd
Current assignee: Shanghai Meishan Iron and Steel Co Ltd
Priority date: 2009-03-16
Filing date: 2009-03-16
Publication date: 2010-01-13
Anticipated expiration: 2019-03-16

Abstract

The utility model relates to a permeable brick for a hot metal ladle, in particular to a double-layered slit permeable brick for bottom-blowing, powder-injecting and dephosphorizing. The utility model mainly solves the technical problems that the permeable brick fails to meet the requirements of bottom-blowing, powder-injecting and dephosphorizing. The purpose of the utility model is fulfilled through the structure as follows: the double-layered slit permeable brick for bottom-blowing, powder-injecting and dephosphorizing comprises a connecting pipe and a permeable brick body, wherein the connecting pipe is a cylinder for sleeve ring channels; the permeable brick body is formed by a permeable brick housing and a material-refractory brick body arranged thereon; the two channels of the connecting pipe are connected with a central gas chamber and a side gas chamber of the permeable brick body; the two gas chambers are provided with gradual enlargers; frustum-shaped brick bodies are arranged on the two gas chambers; each brick body is formed by an inner ring and an outer ring; a radial slit is formed on the inner ring; a ring seam-shaped slit is formed on the outer ring; the numbers of the slits of the inner ring and the outer ring are both 30 to 50; and the width of each slit is 0.15 to 0.2 mm. The utility model is used for dephosphorization process of molten iron.

Description

A kind of double-deck slit air brick that is used for the bottom blowing powder injection dephosphorization

Technical field

The utility model relates to a kind of ladle air brick, and particularly a kind of double-deck slit air brick that is used for the bottom blowing powder injection dephosphorization is used for dephosphorization of molten iron technology.

Background technology

A variety of dephosphorizing process are arranged at present, as top blast paddling process dephosphorization, mechanical mixing method (KR), in addition special-purpose methods such as dephosphorization converter are set.Chinese patent 94118264.9 relates to the improvement to a kind of material of existing combined structure ladle bottom blowing air brick.This structure air brick has a ventilative core brick at the middle part of brick cup, this core brick is followed successively by cavity air chamber, ventilative safety brick and working brick from bottom to up, and inserts is arranged on every side, with stainless steel crust parcel.This class air brick only has ventilative function, can't have jet simultaneously and function that dust.

The utility model content

The purpose of this utility model is to provide a kind of double-deck slit air brick that is used for the bottom blowing powder injection dephosphorization.Mainly solve the technical problem that existing air brick can't satisfy bottom blowing powder injection dephosphorization needs.

The purpose of this utility model is to realize like this, a kind of double-deck slit air brick that is used for the bottom blowing powder injection dephosphorization, comprise tube connector and air brick body, tube connector is the column of collar passage, air brick body is made of air brick overcoat and the brick of anti-material body that is located on it, two passages of tube connector connect air brick body central authorities' air chamber and limit air chamber respectively, two air chambers all have flaring, connect taper type brick body on two air chambers, the brick body is made of interior ring and outer shroud, has radiation shape slit on the interior ring, and outer shroud has circumferential weld shape slit, in, the outer shroud slit is respectively the 30-50 bar, slit width 0.15-0.2mm.

The beneficial effects of the utility model: compared with prior art, the bottom blowing powder injection dephosphorizing technology has following characteristics: reduce equipment investment and operating cost, reduce temperature drop and required time of spray gun lifting that the spray gun heat absorption causes; Can utilize whole strokes of the molten iron degree of depth, increase the time of staying of Dephosphorising agent in molten iron, thereby improve the utilization rate of Dephosphorising agent; The bottom blowing powder injection dephosphorization can carry out with desulfurization preliminary treatment order on same station, need not to increase new station and Cinder Machine; Technological operation is simple, grasps easily.

Description of drawings

Fig. 1 is the utility model cutaway view;

Fig. 2 is the utility model vertical view.

Among the figure: 1-radiation shape slit, 2-circumferential weld shape slit, the 3-brick of anti-material body, 4-air chamber, 5-flaring, 6-tube connector, 7-air brick overcoat.

The specific embodiment

As Fig. 1, shown in Figure 2, a kind of double-deck slit air brick that is used for the bottom blowing powder injection dephosphorization, comprise tube connector 6 and air brick body, tube connector 6 is the column of collar passage, air brick body is made of air brick overcoat 7 and the brick of anti-material body 3 that is located on it, two passages of tube connector connect air brick body central authorities' air chamber and limit air chamber 4 respectively, two air chambers all have flaring 5, connect the taper type brick of anti-material body 3 on two air chambers, the brick body is made of interior ring and outer shroud, has radiation shape slit 1 on the interior ring, and outer shroud has circumferential weld shape slit 2, in, the outer shroud slit is respectively the 30-50 bar, slit width 0.15-0.2mm.The bottom blowing powder injection dephosphorization is realized by many slits.Pulvis is difficult for stopping up the hole of slit, and the ventilative area of slit is big, can regulate flow in bigger scope.In the process of bottom blowing powder injection, the oxygen that ring spray is gone in the tube connector 6, enter the molten bath by directly passing slit behind tube connector process flaring 5 and the air chamber 4, the tube connector outer shroud sprays into nitrogen and pulvis, when primary mixture entered flaring 5 and air chamber 4 by tube connector after, powder and gas fully mixed, and gas carries pulvis and passes slit and enter the molten bath, it is too high that outer field nitrogen and pulvis can be unlikely to the oxygen parcel of internal layer to make fire point temperature simultaneously, weakens the erosion to refractory material.

Claims

1, a kind of double-deck slit air brick that is used for the bottom blowing powder injection dephosphorization, comprise tube connector and air brick body, it is characterized in that: air brick body is made of air brick overcoat and the brick of anti-material body that is located on it, tube connector is the column of collar passage, and two passages of tube connector connect air brick body central authorities' air chamber and limit air chamber respectively, and two air chambers all have flaring, connect taper type brick body on two air chambers, the brick body is made of interior ring and outer shroud, has radiation shape slit on the interior ring, and outer shroud has circumferential weld shape slit.

2, a kind of double-deck slit air brick that is used for the bottom blowing powder injection dephosphorization according to claim 1 is characterized in that: ring and outer shroud slit are respectively the 30-50 bar, slit width 0.15-0.2mm in the brick body.