TWI490468B - Device and method for slag resistance test - Google Patents

Description

Anti-slag erosion test device and method

The invention relates to a test device and method, and in particular to an anti-slag erosion test device and method.

The common common refractory resistance slag erosion test method is mainly based on the rotary gas furnace anti-slag erosion test method and the high-frequency anti-slag erosion test method. Among them, the high-frequency anti-slag erosion test method requires more manpower to operate and control, and the test cost is higher. Therefore, the rotary blast furnace slag corrosion test method is more commonly used at present.

Please refer to FIG. 1A and FIG. 1B simultaneously, which respectively show a schematic structural diagram of a conventional rotary gas furnace anti-slag erosion test device and a schematic structural view of the rotary gas furnace. As shown in FIG. 1A, a conventional rotary gas furnace slag erosion test apparatus 100 includes a rotary gas furnace 120 and a gas gun 140. As shown in FIGS. 1A and 1B, the rotary gas furnace 120 is a tubular furnace body having an opening 120a and a furnace 121, and the gas gun 140 is disposed at the opening 120a. When the slag corrosion resistance test is performed, first, the test pieces 160 of different refractories must be arranged along the inner wall of the furnace 121 to build the test block 160 on the inner wall of the furnace 121. The slag 180 is then placed in the furnace 121 and the slag 180 is heated by a gas gun 140. Among them, in the slag When 180 is placed in the furnace 121, the amount of slag 180 added may be limited by the height of the opening 120a to fill the entire furnace 121. Therefore, in order to allow each of the test pieces 160 in the furnace 121 to be eroded by the slag 180, the rotary gas furnace 120 must be rotated while the slag 180 is molten, thereby causing the molten slag 180 to follow the rotary gas furnace 120. The rotation of the test block 160 is sequentially washed to achieve the purpose of causing the slag 180 to erode each test block 160.

However, rotary blast furnace slag erosion test methods have a number of disadvantages. The rotary gas furnace 120 is an open space. While the rotary gas furnace 120 is rotating, the test block 160 and the slag 180 are in an aerobic environment, and the material components in the slag 180 are in an aerobic environment. The properties exhibited in a reducing environment are not the same. Therefore, the rotary gas furnace slag corrosion resistance test method cannot reflect the case where the test block 160 is eroded by the slag 180 under actual use conditions. Furthermore, the test block 160 used in the conventional rotary gas furnace slag erosion test method has a large volume, and when the number and volume of the test block 160 are insufficient, the test progress is affected.

Accordingly, it is an object of the present invention to provide an apparatus and method for resisting slag erosion which can simulate the actual use environment of the test piece and improve the accuracy of evaluating the erosion resistance of the test piece.

Another object of the present invention is to provide an apparatus and method for resisting slag erosion which can reduce the size of a test piece required, and can avoid problems caused by the lack of the number and volume of conventional test pieces.

According to the above object of the present invention, a method for resisting slag erosion test is proposed, comprising the following steps. First, a test device is provided, and the test device Includes gas furnace and heating unit. Wherein, the gas furnace has a furnace and a test piece fixing portion located at the bottom of the furnace. Next, a test piece setting step is performed to set a plurality of test pieces in the test piece fixing portion. Subsequently, a slag step is performed to add the slag to the furnace and the slag covers the test piece. Then, a heating step is performed to heat the slag by the heating means to melt the slag and keep the test piece in contact with the molten slag.

According to an embodiment of the present invention, the above method for resisting slag erosion test further includes a judging step of taking out a test piece to determine an erosion index of the test piece after performing the heating step for a period of time.

According to another embodiment of the present invention, the test pieces are respectively refractory bricks of different kinds or materials.

According to the above object of the present invention, an anti-slag erosion test apparatus is further proposed. The anti-slag erosion test device comprises a gas furnace and a heating device. The gas furnace has a furnace and a test piece fixing portion at the bottom of the furnace. The heating device is placed beside the gas furnace to serve as a heat source for the gas furnace.

According to an embodiment of the invention, the gas furnace has an opening communicating with the furnace, and the heating device is disposed at the opening of the gas furnace.

According to another embodiment of the invention, the heating device is a gas gun.

According to still another embodiment of the present invention, the furnace is cylindrical, and the test piece fixing portion is a recess recessed into the inner surface of the furnace.

100‧‧‧Rotary gas furnace anti-slag erosion test device

120‧‧‧Rotary gas furnace

120a‧‧‧ openings

121‧‧‧ furnace

140‧‧‧ gas gun

160‧‧‧ test block

180‧‧‧ slag

200‧‧‧Test method for resistance to slag erosion

201‧‧‧Testing device supply steps

202‧‧‧Test piece setup steps

203‧‧‧ slag step

204‧‧‧heating steps

205‧‧‧ judgment steps

300‧‧‧Testing device

320‧‧‧ gas furnace

321‧‧‧ furnace

323‧‧‧Test piece fixing department

320a‧‧‧ openings

340‧‧‧heating device

400‧‧‧ test strips

500‧‧‧ slag

The above and other objects, features, advantages and embodiments of the present invention are made. The description of the drawings is as follows: Figure 1A is a schematic view showing the structure of a conventional rotary gas furnace anti-slag erosion test device.

FIG. 1B is a schematic view showing the structure of a conventional rotary gas furnace.

2 is a flow chart showing a method for testing slag erosion resistance according to an embodiment of the present invention.

3A is a schematic view showing the structure of an anti-slag erosion test apparatus according to an embodiment of the present invention.

FIG. 3B is a schematic structural view of a gas furnace according to an embodiment of the present invention.

Please refer to FIG. 2, FIG. 3A and FIG. 3B simultaneously. FIG. 2 is a flow chart showing a method for testing slag erosion resistance according to an embodiment of the present invention, and FIGS. 3A and 3B are respectively drawn. A schematic structural view of a slag corrosion resistance test apparatus and a schematic structural view of the gas furnace according to an embodiment of the present invention are shown. In the slag erosion resistance test method 200, a test device providing step 201 is first performed to provide the test device 300 as shown in Figs. 3A and 3B.

Referring to FIGS. 3A and 3B, the slag erosion resistance test apparatus 300 of the present embodiment includes a gas furnace 320 and a heating device 340. The heating device 340 is disposed beside the gas furnace 320 to serve as a heat source required for the gas furnace 320. As shown in FIG. 3B, the gas furnace 320 has a furnace 321 and a test piece fixing portion 323. The furnace 321 is an accommodating space inside the gas furnace 320, and the test piece fixing portion 323 is located at the bottom of the furnace 321 and is mainly used for accommodating different types or different types. Test piece 400 of material. In an exemplary embodiment, the grate 321 is cylindrical, and the test piece fixing portion 323 is a recess recessed into the inner surface of the grate 321 . If it is intended to be clear, the shape of the hearth 321 is not limited to a cylindrical shape.

Referring to FIGS. 3A and 3B, in an embodiment, the gas furnace 320 has an opening 320a communicating with the furnace 321 and the heating device 340 is disposed at the opening 320a of the gas furnace 320. The heating device 340 may be a gas gun, but the invention is not limited thereto.

Referring to FIGS. 2, 3A, and 3B again, after the test apparatus is provided with step 201, the test piece setting step 202 is performed to set a plurality of test pieces 400 in the test piece fixing portion 323. The test piece 400 referred to in the embodiment may be a refractory brick or other material sample to be subjected to the slag resistance test. Further, in the present embodiment, the test piece 400 may be in the form of a rectangular sheet and may be arranged in the test piece fixing portion 323.

After the test piece setting step 202, a slag step 203 is subsequently performed to add the slag 500 to the furnace 321 and the slag 500 covers the test piece 400. As shown in FIG. 3B, since the test piece fixing portion 323 is a recess recessed into the inner surface of the furnace 321, when the slag 500 is added to the furnace 321, it can completely cover each test set in the test piece fixing portion 323. Slice 400. In the present embodiment, the height of the slag 500 in the grate 321 does not exceed the height of the opening 320a.

After the slag step 203, a heating step 204 is then performed to heat the slag 500 by the heating device 340 to melt the slag 500 and keep the test piece 400 in contact with the molten slag 500. It is to be understood that the gas furnace 320 of the present invention is fixed, so that the slag 500 can be completely covered in a molten state. Each of the test strips 400 can maintain the test strip 400 in an environment of reduction and is eroded by the slag 500, thereby achieving the purpose of simulating the actual use environment of the test strip 400, thereby improving the accuracy of the evaluation test strip 400 against erosion. Sex.

After the heating step 204, a determination step 205 is then performed to take out all of the test strips 400 after performing the heating step 204 for a period of time to determine the erosion index of each of the test strips 400, respectively. The erosion index referred to herein is calculated based on the area and thickness at which the surface of the test piece 400 is eroded. Therefore, the corrosion resistance of each test piece 400 can be judged by comparing the erosion indexes of the respective test pieces 400.

The slag corrosion test results of the magnesia-carbon bricks (sample A, sample B) of the steel slag line of steelmaking plants of two different manufacturers are tested by the slag corrosion resistance test apparatus 300 of the present invention. Please refer to Table 1 and Table 2, where Table 1 is a comparison table of physical properties of Sample A and Sample B, and Table 2 is the erosion index of Sample A and Sample B and the actual number of times that can be used. It can be seen from Table 2 that the erosion index of sample A is larger than the erosion index of sample B, and it can be seen that sample A is more easily eroded by slag than sample B. From the actual number of times that can be used, it can be seen that the number of times the sample A can be used is less than the number of times the sample B can be used, and the result does meet the erosion index calculated by the slag resistance test method according to the present invention. It can be seen that the slag erosion resistance test apparatus 300 of the present invention can simulate the actual use environment of the test strip 400, thereby improving the accuracy of evaluating the erosion resistance of the test strip 400.

According to the embodiment of the present invention, the slag erosion resistance test apparatus of the present invention has a test piece fixing portion, and the test piece fixing portion is configured to be recessed into the bottom surface of the furnace. Therefore, when the slag is placed in the furnace, the slag can be completely covered. The amount of slag required for each test piece is not required too much. In addition, the slag completely covers each test piece to keep the test piece in a reducing environment, so as to achieve the purpose of simulating the actual use environment of the test piece, thereby improving the evaluation test. The accuracy of the sheet's resistance to erosion. Further, by arranging the test piece fixing portion on the bottom of the standing gas furnace, the size of the required test piece can be reduced, thereby avoiding the problem that the test is performed due to the shortage of the number of conventional test pieces and the volume.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

200‧‧‧Test method for resistance to slag erosion

201‧‧‧Testing device supply steps

202‧‧‧Test piece setup steps

203‧‧‧ slag step

204‧‧‧heating steps

205‧‧‧ judgment steps

Claims (9)

An anti-slag erosion test method includes: providing a test device, the test device comprising a gas furnace and a heating device, wherein the gas furnace has a furnace and a test piece fixing portion at a bottom of the furnace, wherein the gas furnace has a An opening is connected to the furnace, and the heating device is disposed at the opening of the gas furnace; a test piece setting step is performed to set a plurality of test pieces in the test piece fixing portion; and a slag step is performed to Slag is added to the furnace and the slag is covered with the test pieces; and a heating step is performed to heat the slag by the heating device to melt the slag and keep the test pieces in contact with the molten slag. The anti-slag erosion test method according to claim 1, further comprising a judging step of taking out the test pieces for a period of time after performing the heating step to respectively determine the erosion indexes of the test pieces. The anti-slag erosion test method of claim 1, wherein the heating device is a gas gun. The method for testing slag erosion resistance according to claim 1, wherein the test pieces are refractory bricks of different types or materials. The slag erosion resistance test method according to claim 1, wherein the furnace is cylindrical, and the test piece fixing portion is concavely recessed into an inner surface of the furnace groove. An anti-slag erosion test device comprises: a gas furnace having a furnace and a test piece fixing portion at a bottom of the furnace; and a heating device disposed beside the gas furnace as a heat source required for the gas furnace. The anti-slag erosion test apparatus of claim 6, wherein the gas furnace has an opening communicating with the furnace, and the heating device is disposed at the opening of the gas furnace. The anti-slag erosion test apparatus of claim 7, wherein the heating device is a gas gun. The anti-slag erosion test apparatus of claim 6, wherein the grate is cylindrical, and the test piece fixing portion is a recess recessed into an inner surface of the grate.