CN101928817A - Method for preparing protective gas for heat treatment of metals - Google Patents
Method for preparing protective gas for heat treatment of metals Download PDFInfo
- Publication number
- CN101928817A CN101928817A CN2010102671708A CN201010267170A CN101928817A CN 101928817 A CN101928817 A CN 101928817A CN 2010102671708 A CN2010102671708 A CN 2010102671708A CN 201010267170 A CN201010267170 A CN 201010267170A CN 101928817 A CN101928817 A CN 101928817A
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- China
- Prior art keywords
- gas
- preparation
- metal heat
- incomplete combustion
- heat treatmet
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
Abstract
The invention relates to a method for preparing protective gas for heat treatment of metals, which comprises the following steps of: mixing combustible gas and air and supplying the mixture into a combustion furnace; igniting the combustible gas to allow the combustible gas to combust in the combustion furnace incompletely, wherein inert gases, reducible gases and water are produced in the incomplete combustion of the combustible gas; dehydrating products of the incomplete combustion to obtain the protective gas. Compared with the prior art, the invention has the advantages that: the atmosphere reduction property is good; energy is saved; the inert gases, which refer to nitrogen and carbon dioxide, conduct an emptying function and a workpiece oxidization preventing function; and the reducible gases, which refer to carbon monoxide and hydrogen, reduce oxide films of workpieces that are formed before entering the furnace to ferric ion.
Description
Technical field
The present invention relates to the thermal treatment field, especially relate to the method that preparation is used for the shielding gas of metal heat treatmet.
Background technology
During METAL HEATING PROCESS, workpiece is exposed in the air, and oxidation, decarburization (being that the steel-iron components carbon contents reduces) usually take place, this for thermal treatment after the surface property of part very adverse influence is arranged.Thereby metal should heat in controlled atmosphere or protective atmosphere usually, and controlled atmosphere generally adopts nitrogen, and generally is bottled nitrogen.Such shortcoming is clearly, and the bottled gas amount is few, can not use troublesome poeration, cost height continuously.
Summary of the invention
Purpose of the present invention is exactly that a kind of simple to operate, method that preparation that practicality is high is used for the shielding gas of metal heat treatmet is provided in order to overcome the defective that above-mentioned prior art exists.
Purpose of the present invention can be achieved through the following technical solutions: preparation is used for the method for the shielding gas of metal heat treatmet, it is characterized in that this method comprises:
(1) inflammable gas and air mixed are infeeded roasting kiln;
(2) ignited flammable gas makes it carry out incomplete combustion in roasting kiln;
(3) the inflammable gas incomplete combustion generates rare gas element, reducing gas and water;
(4) products of incomplete combustion is dewatered generation shielding gas.
Described inflammable gas comprises Sweet natural gas and/or coal gas.
Described inflammable gas comprises methane and/or propane.
Described rare gas element comprises nitrogen and carbonic acid gas.
Described reducing gas comprises carbon monoxide and hydrogen.
The ratio of described inflammable gas and air is 1: 14～1: 17.
Compared with prior art, the present invention has the following advantages: the one, and atmosphere is Well-recovered, the 2nd, energy-conservation, inert nitrogen gas and carbonic acid gas play emptying, workpiece is implemented not oxidized effect, and reducing gas carbon monoxide and hydrogen role are workpiece to be advanced the oxide film that the stokehold formed revert back the iron ion state.
Embodiment
The present invention is described in detail below in conjunction with specific embodiment.
Embodiment 1
Preparation is used for the method for shielding gas of metal heat treatmet, and this method comprises: inflammable gas and air are infeeded roasting kiln according to 1: 14 mixed; Ignited flammable gas makes it carry out incomplete combustion in roasting kiln; The inflammable gas incomplete combustion generates reducing gas and water; With the products of incomplete combustion generation shielding gas that dewaters.
Inflammable gas is common Sweet natural gas and coal gas, and main component is methane and propane.Then the gaseous constituent of Sheng Chenging is as follows:
Nitrogen 60%～62%
Carbonic acid gas 12%
Carbon monoxide 7.5%～8.5%
Hydrogen 1%～1.2%
Wherein nitrogen and carbonic acid gas play emptying as vent gas, and workpiece is implemented not oxidized effect, and carbon monoxide and hydrogen are workpiece to be advanced the oxide film that the stokehold formed revert back the iron ion state as the reducing gas role.
Embodiment 2
Preparation is used for the method for shielding gas of metal heat treatmet, and this method comprises: inflammable gas and air are infeeded roasting kiln according to 1: 17 mixed; Ignited flammable gas makes it carry out incomplete combustion in roasting kiln; The inflammable gas incomplete combustion generates reducing gas and water; With the products of incomplete combustion generation shielding gas that dewaters.
Inflammable gas is common Sweet natural gas and coal gas, and main component is methane and propane.Then the gaseous constituent of Sheng Chenging is as follows:
Nitrogen 65%
Carbonic acid gas 13%
Carbon monoxide 2.5%～5%
Hydrogen 0.7%～1%
Wherein nitrogen and carbonic acid gas play emptying as vent gas, and workpiece is implemented not oxidized effect, and carbon monoxide and hydrogen are workpiece to be advanced the oxide film that the stokehold formed revert back the iron ion state as the reducing gas role.
Embodiment 3
Preparation is used for the method for shielding gas of metal heat treatmet, and this method comprises: inflammable gas and air are infeeded roasting kiln according to 1: 15 mixed; Ignited flammable gas makes it carry out incomplete combustion in roasting kiln; The inflammable gas incomplete combustion generates reducing gas and water; With the products of incomplete combustion generation shielding gas that dewaters.
Inflammable gas is common Sweet natural gas and coal gas, and main component is methane and propane.Then the gaseous constituent of Sheng Chenging is as follows:
Nitrogen 62～63%
Carbonic acid gas 12%～13%
Carbon monoxide 5%～7%
Hydrogen 1%
Wherein nitrogen and carbonic acid gas play emptying as vent gas, and workpiece is implemented not oxidized effect, and carbon monoxide and hydrogen are workpiece to be advanced the oxide film that the stokehold formed revert back the iron ion state as the reducing gas role.
Claims (6)
1. preparation is used for the method for the shielding gas of metal heat treatmet, it is characterized in that this method comprises:
(1) inflammable gas and air mixed are infeeded roasting kiln;
(2) ignited flammable gas makes it carry out incomplete combustion in roasting kiln;
(3) the inflammable gas incomplete combustion generates rare gas element, reducing gas and water;
(4) products of incomplete combustion is dewatered generation shielding gas.
2. preparation as claimed in claim 1 is used for the method for the shielding gas of metal heat treatmet, it is characterized in that, described inflammable gas comprises Sweet natural gas and/or coal gas.
3. preparation as claimed in claim 1 is used for the method for the shielding gas of metal heat treatmet, it is characterized in that, described inflammable gas comprises methane and/or propane.
4. preparation as claimed in claim 1 is used for the method for the shielding gas of metal heat treatmet, it is characterized in that, described rare gas element comprises nitrogen and carbonic acid gas.
5. preparation as claimed in claim 1 is used for the method for the shielding gas of metal heat treatmet, it is characterized in that, described reducing gas comprises carbon monoxide and hydrogen.
6. preparation as claimed in claim 1 is used for the method for the shielding gas of metal heat treatmet, it is characterized in that, the ratio of described inflammable gas and air is 1: 14～1: 17.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102671708A CN101928817A (en) | 2010-08-27 | 2010-08-27 | Method for preparing protective gas for heat treatment of metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102671708A CN101928817A (en) | 2010-08-27 | 2010-08-27 | Method for preparing protective gas for heat treatment of metals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101928817A true CN101928817A (en) | 2010-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102671708A Pending CN101928817A (en) | 2010-08-27 | 2010-08-27 | Method for preparing protective gas for heat treatment of metals |
Country Status (1)
| Country | Link |
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| CN (1) | CN101928817A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115654490A (en) * | 2022-10-31 | 2023-01-31 | 杭州富通集团有限公司 | Protective gas supply device for oxygen-free copper rod production |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054622A (en) * | 1991-04-24 | 1991-09-18 | 文联煜 | The agent of nitrogen group protecting atmosphere system gas |
| CN1104172A (en) * | 1994-10-06 | 1995-06-28 | 上海冶金设计研究院 | Method for preparation of carbon monoxide-hydrogen-nitrogen type atmosphere and its apparatus |
| CN1163795A (en) * | 1996-03-19 | 1997-11-05 | 梅塞尔·格里斯海姆有限公司 | Process for preparing blanketing gases or reaction gases for heat treatment of metals |
| EP0866141A1 (en) * | 1997-03-18 | 1998-09-23 | Praxair Technology, Inc. | Process for the generation of a low dew-point, oxygen-free protective atmosphere for the performance of thermal treatments |
-
2010
- 2010-08-27 CN CN2010102671708A patent/CN101928817A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054622A (en) * | 1991-04-24 | 1991-09-18 | 文联煜 | The agent of nitrogen group protecting atmosphere system gas |
| CN1104172A (en) * | 1994-10-06 | 1995-06-28 | 上海冶金设计研究院 | Method for preparation of carbon monoxide-hydrogen-nitrogen type atmosphere and its apparatus |
| CN1163795A (en) * | 1996-03-19 | 1997-11-05 | 梅塞尔·格里斯海姆有限公司 | Process for preparing blanketing gases or reaction gases for heat treatment of metals |
| EP0866141A1 (en) * | 1997-03-18 | 1998-09-23 | Praxair Technology, Inc. | Process for the generation of a low dew-point, oxygen-free protective atmosphere for the performance of thermal treatments |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115654490A (en) * | 2022-10-31 | 2023-01-31 | 杭州富通集团有限公司 | Protective gas supply device for oxygen-free copper rod production |
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Application publication date: 20101229 |