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A preparation method of a tundish heat preservation device for gas atomized tin powder

A technology of a heat preservation device and a tundish, which is applied in the field of preparation of a tundish heat preservation device for gas atomized tin powder, can solve the problems of easily broken quartz crucibles, easy burning of resistance wires, frequent replacement, etc. Damage and high heating efficiency

Active Publication Date: 2017-05-10
有研粉末新材料(合肥)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the electric heating insulation device is assembled by resistance wire, quartz crucible, insulation cotton, iron plate, etc. The resistance wire is wound on the outside of the quartz crucible. The disadvantage is that the quartz crucible is very easy to break during use, and the resistance wire is also easy to burn. broken, frequent replacement, high cost

Method used

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  • A preparation method of a tundish heat preservation device for gas atomized tin powder
  • A preparation method of a tundish heat preservation device for gas atomized tin powder
  • A preparation method of a tundish heat preservation device for gas atomized tin powder

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Embodiment 1

[0028] A method for preparing a tundish heat preservation device for gas atomized tin powder, using a 3mm thick iron plate to prepare a cylindrical crucible with a height of 500mm and a diameter of 350mm. Four rows of round holes are opened axially around the crucible, and each row is opened with five holes at equal distances. The diameter of the round holes is 6mm, and the hole distance is 80mm. Install insulation cotton on the inner wall of the crucible, each round hole is passed through by a bolt, and two ceramic rings are installed on one side of the inner wall, and the two ceramic rings are installed opposite each other. 15mm in diameter. Then wind a total of 5 turns of resistance wire along the gap of the ceramic ring, install a square shell and fill with insulation cotton, and prepare a heat preservation device, such as image 3 .

Embodiment 2

[0030] A method for preparing a tundish heat preservation device for gas atomized tin powder, using a 3mm thick iron plate to prepare a cylindrical crucible with a height of 500mm and a diameter of 350mm. There are 5 rows of round holes axially opened around the crucible, and 7 holes are opened equidistantly in each row. The diameter of the round holes is 6mm, and the hole distance is 62mm. Install insulation cotton on the inner wall of the crucible, each round hole is passed through by a bolt, and two ceramic rings are installed on one side of the inner wall, and the two ceramic rings are installed opposite each other. 15mm in diameter. Then wind a total of 7 turns of resistance wire along the gap of the ceramic ring, install a square shell and fill with insulation cotton, and prepare a heat preservation device, such as Figure 4 .

Embodiment 3

[0032] A method for preparing a tundish heat preservation device for gas atomized tin powder, using a 3mm thick iron plate to prepare a cylindrical crucible with a height of 600mm and a diameter of 400mm. Four rows of round holes are opened axially around the crucible, and each row is equidistantly opened with five round holes, the diameter of the round holes is 5mm, and the hole distance is 100mm. Install insulation cotton on the inner wall of the crucible, each round hole is passed through by a bolt, two ceramic rings are installed on one side of the inner wall, the two ceramic rings are installed opposite each other, the hole diameter is 5mm, the outer diameter is 50mm, the height of the boss of the ceramic ring is 5mm, 15mm in diameter. Then wind the resistance wire along the gap of the ceramic ring, install the circular shell and fill the insulation cotton, and prepare the insulation device, such as Figure 5 .

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Abstract

The invention belongs to the technical field of metal powder preparation, and particularly relates to a production method for a tundish heat-insulating device for gas atomization of tin powder. The production method includes making iron plates or stainless steel plates into a cylindrical crucible, trepanning upper and lower surfaces of the crucible according to the size of a tundish, trepanning the periphery of the crucible at equal intervals, adhering a layer of heat-insulating cotton to the inner side of the crucible, allowing bolts to penetrate round holes, sleeving two opposite ceramic rings on the inner side of the crucible, winding resistance wires around a gap formed along the two ceramic rings to produce a heating crucible, fixing the heating crucible in a jacket made of iron plates or stainless steel plates and filling a middle gap with heat-insulating cotton to produce the tundish heat-insulating device. The tundish heat-insulating device produced according to the production method has the advantages that the iron crucible is sturdy and durable, and replacement frequency is low; the resistance wires are not easy to burn out, heating efficiency is high as compared with that of a quartz crucible, cost is saved and the like.

Description

technical field [0001] The invention belongs to the technical field of metal powder preparation, and in particular relates to a preparation method of a tundish heat preservation device for gas atomized tin powder. Background technique [0002] Tin powder is widely used in diamond tools, friction materials and other powder metallurgy products. At present, the most important preparation method is air atomization. The process is to melt tin ingots into liquid in a tin melting furnace, and then flow into the tundish through the tin liquid diversion device. There is a leak hole at the bottom of the tundish. The high-pressure gas released breaks up the liquid injection to achieve the purpose of atomization and powder making. Among them, in the atomization process, in order to prevent the tin liquid from cooling, it is necessary to ensure that the temperature of the tundish is maintained within a temperature range higher than the melting point of the tin powder. This requires a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08
Inventor 徐景杰刘一浪穆艳如张敬国马飞戴赫张彬刘祥庆党文龙庞鹏沙
Owner 有研粉末新材料(合肥)有限公司