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Cooling device for vertical bright annealing furnace

A technology of cooling device and annealing furnace, which is applied in the direction of furnace, heat treatment furnace, furnace type, etc., can solve the problem of destroying the surface finish, and achieve the effect of high finish and flatness

Inactive Publication Date: 2011-05-25
艾伯纳工业炉(太仓)有限公司
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Problems solved by technology

[0003] During the bright annealing process of alloy steel, the following difficulties must be overcome: the elements Cr, Mn, and trace addition elements Ti, Si, Al, etc. contained in alloy steel have high oxygen affinity, and it is easy to form oxides to destroy the surface finish.

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  • Cooling device for vertical bright annealing furnace
  • Cooling device for vertical bright annealing furnace

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Embodiment Construction

[0017] The concrete structure of the present invention will be described in detail below with reference to accompanying drawing:

[0018] Refer to attached figure 1 As shown, a cooling device for a vertical annealing furnace includes: a radiant cooling zone 9 and several sections of cooling injectors 10 connected to the radiative cooling zone 9 . Radiant cooling zone 9 is a natural cooling zone, which is the transition from the annealing furnace in the heating section to the main cooling zone in the cooling section, and is generally set to be about 1 meter long.

[0019] The cooling injector 10 includes a cooling channel 12 , a heat exchanger 5 and a spray fan 7 symmetrically arranged on both sides of the cooling channel 12 . The spray cooler 10 can be provided with multi-stage cooling, and the specific number of stages can be adjusted according to the size of the furnace. The cooling injector 10 of the present embodiment is provided with two stages. The lower end of the coo...

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Abstract

The invention relates to a cooling device for a vertical bright annealing furnace. The device comprises a radiation-type cooling zone and a plurality of sections of cooling ejectors, wherein each cooling ejector comprises a cooling channel, a heat exchanger and an ejecting fan; the lower end part of the cooling channel is connected with one end of the heat exchanger; the upper end part of the cooling channel is connected with one end of the ejecting fan; the other end of the heat exchanger is connected with the other end of the ejecting fan; the ejecting fan symmetrically ejects hydrogen to wash strip steel and is matched with the heat exchanger to cyclically cool hot hydrogen; graphite rollers are arranged inside the cooling channel; two graphite rollers are arranged in an externally tangent mode; and a strip steel passing line passes through a tangent point of the two graphite rollers. Airflow in the cooling ejectors is adjustable, and the surface of the cooled strip steel has higher finish and flatness.

Description

technical field [0001] The invention relates to a cooling device for a vertical bright annealing furnace. Background technique [0002] The vertical bright annealing furnace is suitable for heat treatment annealing equipment of high-alloy Cr (ferritic Cr alloy steel and martensitic Cr alloy steel) and CrNi (austenitic CrNi alloy steel), and is suitable for annealing of strip steel. [0003] During the bright annealing process of alloy steel, the following difficulties must be overcome: the elements Cr, Mn, and trace elements Ti, Si, Al, etc. contained in alloy steel have high oxygen affinity, and are easy to form oxides to damage the surface finish. To avoid the formation of such oxides, this requires high annealing temperatures, low dew points (below -60°C) and the use of a protective atmosphere that is more reducing than for iron annealing. [0004] In the annealing of the alloy strip, in addition to avoiding oxidation, in order to obtain a bright and smooth surface, it i...

Claims

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Application Information

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IPC IPC(8): C21D1/26C21D9/54
Inventor 罗伯特・艾伯纳
Owner 艾伯纳工业炉(太仓)有限公司
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