TWI731682B - Furnace lining working layer structure for holding molten iron - Google Patents

Abstract

A furnace lining working layer structure for containing molten iron is suitable for being a pouring runner extending along a length direction, and comprises: a pre-cast block layer; a high corrosion-resistant material layer arranged on the pre-cast block layer, wherein , The length of the high corrosion resistance material layer along the length direction is less than the length of the precast block layer along the length direction to form a transition structure between the high corrosion resistance material layer and the precast block layer; and a castable The layer is embedded in the transition structure to improve the adhesion between the castable layer, the high corrosion-resistant material layer and the pre-cast block layer, and make the molten iron easy to solidify and not easy to continue to penetrate.

Description

Furnace lining working layer structure for holding molten iron

The invention relates to a furnace lining working layer structure, in particular to a furnace lining working layer structure for containing molten iron.

Referring to Figures 1 to 4, a conventional blast furnace pouring runner with high corrosion resistance and longevity lining operation layer structure is suitable for use as a furnace lining in a pouring runner 19. As shown in Figure 2, the section II-II of Figure 1 shows that the high corrosion-resistant and long-life lining working layer structure of the conventional pouring runner is a composite lining working layer, which includes a specially arranged castable layer 13 and a pre-cast block layer 14, and a high corrosion resistance material layer 15, and the high corrosion resistance material layer 15 includes several closely arranged aluminum silicon carbon (ASC) bricks, wherein the material of the precast block layer 14 is similar to that of the castable layer 13, but added 1%~5% of stainless steel wire is added to increase its mechanical strength. In this way, the shaped refractory ASC brick (that is, the high corrosion resistance material layer 15) can be placed on the unshaped material (that is, the pre-cast block layer 14 and the high corrosion resistance material layer 15). The castable layer 13) is placed on it to facilitate the construction of refractory materials and to solve the problem of missing milling (ie, molten iron) caused by the penetration of molten iron into the brick joints.

As shown in Fig. 3 (section III-III of Fig. 2) and Fig. 4 (section IV-IV of Fig. 2), however, the high corrosion resistance and long-life lining of the conventional pouring runner was not considered in the design. The adhesion between the corrosion-resistant material layer 15 and the pre-cast block layer 14 and the adjacent material (that is, the castable layer 13) is especially due to the high corrosion-resistant material layer 15 and the pre-cast block layer 14 under the III-III section The length is the same, and the lengths of the high corrosion resistant material layer 15 and the pre-injected block layer 14 in the IV-IV section are also the same, so the molten iron is likely to continue to penetrate and is not easy to solidify, so that after the use of offline cooling, the high corrosion resistant material layer 15 and the pre-injected block layer 14 and adjacent materials are prone to gaps between them, so that some materials must be knocked out and the gaps can be filled before they can be reused on the line. Therefore, it is necessary to find a solution.

Therefore, the purpose of the present invention is to provide a furnace lining working layer structure for containing molten iron.

Therefore, the lining working layer structure of the present invention for containing molten iron is suitable as a pouring runner extending along a length direction, and includes: a pre-cast block layer; and a high corrosion-resistant material layer disposed on the pre-cast block layer Above, wherein the length of the high corrosion-resistant material layer along the length direction is less than the length of the pre-cast block layer along the length direction to form a transition structure between the high corrosion-resistant material layer and the pre-cast block layer; and A castable layer is embedded in the transition structure to improve the adhesion between the castable layer, the high corrosion-resistant material layer and the precast block layer, and make the molten iron easy to solidify and not easy to continue to penetrate.

The effect of the present invention is: through the labyrinth design of the transition structure between the high corrosion resistance material layer and the pre-cast block layer, not only can the gap between the castable layer, the high corrosion resistance material layer and the pre-cast block layer be improved It can make the molten iron easy to solidify and not easy to continue to penetrate, so as to increase the service life of the overall pouring runner and reduce the amount of material repair.

Referring to FIGS. 5 to 8, the embodiment of the lining working layer structure for containing molten iron of the present invention is suitable as a pouring runner 29 extending along a length direction X, and is arranged on a damage prevention warning layer 22. In this embodiment, the lining operation layer structure for containing molten iron includes a precast block layer 24, a high corrosion resistance material layer 25, and a castable layer 23.

In this embodiment, the material of the pre-cast block layer 24 is aluminum silicon carbon (ASC) castable, but about 1% to 5% of stainless steel wire is added to improve its mechanical strength.

The high corrosion resistance material layer 25 is disposed on the pre-cast block layer 24 and includes several aluminum silicon carbon bricks closely arranged along the mold 8. The high corrosion resistant material layer 25 belonging to shaped refractory bricks, although its composition is roughly similar to that of the castable layer 23, is mainly aluminum silicon carbon, but the performance of the two is different. The source of the difference is mainly aluminum silicon carbon The bricks are press-formed, so the porosity is low.

As shown in FIGS. 6, 7 (side section VI-VI of FIG. 5) and FIG. 8 (side section VII-VII of FIG. 5), in this embodiment, the high corrosion-resistant material layer 25 is along the length direction The length L1 of X is smaller than the length L2 of the pre-cast block layer 24 along the length direction X to form the high corrosion-resistant material layer 25 and the transition structure 26 between the pre-cast block layer 24 (that is, the high corrosion-resistant material layer 25 It is misaligned with the pre-injection block layer 24 below).

In this embodiment, the material of the castable layer 23 is also aluminum silicon carbon castable and can be embedded in the turning structure 26. The main effect of the present invention is that through the design of the transition between the two different materials of the high corrosion resistance material layer 25 and the precast block layer 24, the castable layer 23, the high corrosion resistance material layer 25 and the precast block layer 24 can be improved. The closeness between the three of the block layer 24 makes the molten iron easy to solidify and not easy to continue to penetrate.

In addition, in this embodiment, a first groove 251 is also provided on the side of the high corrosion resistance material layer 25, and a second groove 241 is provided on the side of the pre-cast block layer 24. With the design of the first groove 251 of the high corrosion resistance material layer 25 and the second groove 241 of the pre-cast block layer 24, the castable layer 23 can be more effectively embedded in the pre-cast block layer 24 and the high The corrosion-resistant material layer 25 improves the adhesion between each other.

In summary, the present invention uses the transition structure 26 between the high corrosion resistance material layer 25 and the pre-cast block layer 24, the first groove 251 of the high corrosion resistance material layer 25, and the second groove of the pre-cast block layer 24 The labyrinth design of the groove 241 can not only improve the adhesion between the castable layer 23, the high corrosion-resistant material layer 25 and the pre-cast block layer 24, but also make the molten iron easy to solidify and not easy to continue to penetrate. In order to improve the service life of the entire pouring runner 29 and reduce the amount of material repair, it can indeed achieve the purpose of the invention.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to Within the scope covered by the patent of the present invention.

22: Loss prevention warning layer 23: castable layer 24: Pre-injection block layer 241: second groove 25: High corrosion resistant material layer 251: first groove 26: Turning structure 28: Mould 29: Pour the runner L1: length L2: length X: length direction

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a top view illustrating the structure of a high corrosion-resistant and long-life furnace lining operation layer of a conventional blast furnace pouring runner; Figure 2 is a cross-sectional view illustrating the section II-II in Figure 1; Figure 3 is a cross-sectional view illustrating the section III-III in Figure 2; Figure 4 is a cross-sectional view illustrating the IV-IV section in Figure 2; Figure 5 is a side sectional view illustrating an embodiment of the structure of the lining working layer for containing molten iron according to the present invention; Figure 6 is a side sectional view illustrating the VI-VI section in Figure 5; Figure 7 is a partially enlarged view illustrating the VI-VI section; and Fig. 8 is a side cross-sectional view illustrating the side cross-section VII-VII in Fig. 5.

23: castable layer

24: Pre-injection block layer

25: High corrosion resistant material layer

29: Pour the runner

X: length direction

Claims (4)

A furnace lining working layer structure for containing molten iron is suitable as a pouring runner extending along a length direction, and includes: a pre-cast block layer, wherein the material of the pre-cast block layer is aluminum silicon carbon castable, And add about 1% to 5% of stainless steel wire to improve its mechanical strength; a high corrosion resistance material layer, including several aluminum silicon carbon bricks, and is arranged on the pre-cast block layer, wherein the high corrosion resistance material layer along The length in the longitudinal direction is less than the length of the pre-cast block layer along the length direction to form a transition structure between the high corrosion resistance material layer and the pre-cast block layer; and a castable layer embedded in the transition structure, In order to improve the adhesion between the castable layer, the high corrosion-resistant material layer and the pre-cast block layer, the molten iron is easy to solidify and not easy to continue to penetrate. The lining work layer structure for containing molten iron according to claim 1, wherein the side surface of the high corrosion resistance material layer is provided with a first groove. The lining operation layer structure for containing molten iron according to claim 2, wherein the side surface of the precast block layer is provided with a second groove. The lining operation layer structure for containing molten iron according to claim 1, wherein the material of the castable layer is aluminum silicon carbon castable.

Images