Graphite crucible for iron ore molten drop test furnace

Abstract

The utility model relates to the technical field of graphite crucibles, and discloses a graphite crucible for an iron ore molten drop test furnace, which comprises a crucible body, a crucible support bottom, an annular table, an outer side fixing ring, a falling groove, a slag removal port, a first annular inclined plane, a second annular inclined plane and a clamping ring groove. By the adoption of the structure, the outer side face of the lower end of the crucible body can be matched through the first annular inclined face and the second annular inclined face, the upper end of the crucible supporting bottom can be inserted into the clamping ring groove, insertion is tight, and leakage is avoided, so that it is guaranteed that reducing gas used in the test does not leak out; and if impurities exist, the impurities can fall onto the annular table from the falling groove and can be conveniently removed through the slag removal opening.

Description

Technical Field

[0001] The utility model relates to the technical field of graphite crucibles, in particular to a graphite crucible for an iron ore droplet test furnace. Background Art

[0002] The high-temperature molten drop performance test of iron ore belongs to a kind of high-temperature metallurgical performance of iron ore. It mainly tests the softening start temperature, softening end temperature, softening range and dripping temperature of iron ore. There is no national standard for this test, only the implementation method. During the test, the sintered ore of specified particle size is placed in the crucible, and a certain amount of coke is added to the upper and lower layers of the material column. The crucible loaded with the sample is placed in the molten drop furnace for heating, and the reducing gas N2:CO=70:30 enters from the bottom of the crucible to reduce the iron ore until the ore is reduced and soft-melted and dripped. The dripping temperature of the ore is generally 1450℃~1500℃, and the slag iron formed after the ore is reduced is easy to stick to the crucible. Each test needs to replace a crucible, and the test consumption is large. In order to solve the above problems, the patent document with announcement number CN 203990686 U provides a graphite crucible for an iron ore molten drop test furnace, including a bottom support pipe mouth and a graphite crucible body. However, it can be seen from the attached drawings that the bottom support pipe opening is provided with a step, which easily leads to the accumulation of impurities at the bottom support pipe opening, thereby causing a gap at the lower end of the graphite crucible body when inserted, and finally causing the reduction gas to leak out. Utility Model Content

[0003] The utility model mainly provides a graphite crucible for an iron ore droplet test furnace, which solves the problem that a bottom support pipe mouth in the prior art is provided with a step, which easily leads to accumulation of impurities at the bottom support pipe mouth, thereby causing a gap at the lower end of the graphite crucible body when inserted, and finally leading to leakage of reducing gas.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A graphite crucible for an iron ore drop test furnace comprises a crucible body and a crucible bottom; a ring platform is provided on the crucible bottom, an outer fixing ring is provided on the crucible bottom corresponding to the position above the ring platform, a drop groove is provided between the outer fixing ring and the crucible bottom, and a slag removal port is provided between the lower end of the outer fixing ring and the ring platform: a first annular slope is provided on the inner side of the outer fixing ring, a second annular slope matching the first annular slope is provided on the outer side of the lower end of the crucible body; a clamping ring groove for clamping the upper end of the crucible bottom is provided at the lower end of the crucible body. With the structure of the present application, the outer side surface of the lower end of the crucible body will be matched through the first annular slope and the second annular slope, and the upper end of the crucible bottom will be inserted into the clamping ring groove, and the insertion is tight and leak-proof, so as to ensure that the reducing gas used in the test does not leak out; and if there are impurities, they can fall from the drop groove to the ring platform and be conveniently removed through the slag removal port.

[0006] Furthermore, a ring baffle is detachably connected to the bottom of the crucible corresponding to the position below the ring platform. With this structure, impurities can be prevented from falling out during use, and cleaning can be performed after the process is completed.

[0007] Furthermore, the upper end of the crucible bottom support is provided with a third annular inclined surface, and the clamping ring groove is provided with a fourth annular inclined surface matching the third annular inclined surface. With this structure, the upper end of the crucible bottom support can be easily inserted and tightly matched.

[0008] Furthermore, the outer fixing ring is fixedly connected to the bottom of the crucible through a connecting rod. With this structure, the outer fixing ring can be easily disassembled, assembled and replaced.

[0009] Furthermore, the outer fixing ring, the annular baffle and the connecting rod are all made of the same material as the crucible body. By making them of the same material, it can be ensured that each component has the same adaptability as the crucible body.

[0010] Beneficial effects: With the structure of the present application, the outer side surface of the lower end of the crucible body will cooperate with the first annular inclined surface and the second annular inclined surface, and the upper end of the crucible bottom will be inserted into the clamping ring groove, and the insertion is tight and leak-proof to ensure that the reducing gas used in the test does not leak out; and if there are impurities, they can fall from the falling groove to the ring table and be conveniently removed through the slag removal port. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a cross-sectional schematic diagram of the crucible bottom support of this embodiment;

[0012] Figure 2 It is a schematic top view of the crucible bottom support of this embodiment.

[0013] Reference numerals: crucible body 1 , crucible bottom 2 , ring platform 3 , outer fixing ring 4 , drop groove 5 , first annular inclined surface 6 , annular baffle 7 , third annular inclined surface 8 , connecting rod 9 . DETAILED DESCRIPTION

[0014] The technical solution of a graphite crucible for an iron ore droplet test furnace involved in the utility model will be further described in detail below in conjunction with embodiments.

[0015] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0016] like Figure 1 , Figure 2 As shown, a graphite crucible for an iron ore drop test furnace of this embodiment comprises a crucible body 1 and a crucible bottom 2; a ring platform 3 is provided on the crucible bottom 2, an outer fixing ring 4 is provided on the crucible bottom 2 corresponding to the position above the ring platform 3, a drop groove 5 is provided between the outer fixing ring 4 and the crucible bottom 2, and a slag removal port is provided between the lower end of the outer fixing ring 4 and the ring platform 3; a first annular slope 6 is provided on the inner side of the outer fixing ring 4, and a second annular slope matching the first annular slope 6 is provided on the outer side of the lower end of the crucible body 1; a clamping ring groove for clamping the upper end of the crucible bottom 2 is provided at the lower end of the crucible body 1. An annular baffle 7 is detachably connected to the crucible bottom 2 corresponding to the position below the ring platform 3. A third annular slope 8 is provided on the upper end of the crucible bottom 2, and a fourth annular slope matching the third annular slope 8 is provided in the clamping ring groove. The outer fixing ring 4 is fixedly connected to the crucible bottom 2 through a connecting rod 9. The outer fixing ring 4, the annular baffle 7 and the connecting rod 9 are all made of the same material as the crucible body 1. With the structure of the present application, the outer side surface of the lower end of the crucible body 1 will be matched through the first annular bevel 6 and the second annular bevel, and the upper end of the crucible bottom 2 will be inserted into the clamping ring groove, and the insertion is tight and leak-proof to ensure that the reducing gas used in the test does not leak out; and if there are impurities, they can fall from the falling groove 5 to the ring platform 3 and be conveniently removed through the slag removal port.

[0017] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A graphite crucible for an iron ore droplet test furnace, characterized in that: It comprises a crucible body and a crucible bottom; a ring platform is arranged on the crucible bottom, an outer fixing ring is arranged on the crucible bottom corresponding to the position above the ring platform, a falling groove is arranged between the outer fixing ring and the crucible bottom, and a slag removal port is arranged between the lower end of the outer fixing ring and the ring platform; a first annular inclined surface is arranged on the inner side of the outer fixing ring, and a second annular inclined surface matching the first annular inclined surface is arranged on the outer side of the lower end of the crucible body; a clamping ring groove for clamping the upper end of the crucible bottom is opened at the lower end of the crucible body.

2. The graphite crucible for an iron ore droplet test furnace according to claim 1, characterized in that: An annular baffle is detachably connected to the bottom of the crucible corresponding to the position below the ring platform.

3. The graphite crucible for an iron ore droplet test furnace according to claim 2, characterized in that: A third annular inclined surface is disposed at the upper end of the crucible support bottom, and a fourth annular inclined surface matching the third annular inclined surface is disposed in the clamping ring groove.

4. The graphite crucible for an iron ore droplet test furnace according to claim 3, characterized in that: The outer fixing ring is fixedly connected to the bottom of the crucible through a connecting rod.

5. The graphite crucible for an iron ore droplet test furnace according to claim 4, characterized in that: The outer fixing ring, the annular baffle and the connecting rod are all made of the same material as the crucible body.

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