Claims
- 1. A method of using an alloy steel in a coal gasification furnace comprising subjecting a water-cooled tube wall to a hot gas atmosphere comprising H.sub.2, CO, CH.sub.4 and H.sub.2 S produced through reaction between coal and a gasifier, wherein said water-cooled tube wall is made of an anti-sulfur attack Cr-Ni-Al-Si alloy steel having a composition consisting essentially of, by weight, 0.03-0.3% of C, 1-10% of Si, not greater than 2.0% of Mn, 10-14% of Ni, 16-18% of Cr, 0.5-10% of Al, 2-3% of Mo, and the balance not less than 50% of Fe.
- 2. A coal gasification furnace comprising:
- a gasification zone for combusting a fine powdered coal with an oxidizing gas to form a combustion gas comprising H.sub.2, CO, CH.sub.4 and H.sub.2 S; and
- a heat collection zone covered on its inner wall with water-cooled tubes, wherein said water-cooled tubes are exposed to said combustion gas and wherein each of said water-cooled tubes is made of an anti-sulfur attack Cr-Ni-Al-Si alloy steel having a composition consisting essentially of, by weight, 0.03 to 0.3% of C, 1-10% of Si, not greater than 2.0% of Mn, 10-14% of Ni, 16-18% of Cr, 0.5-10% of Al, 2-3% of Mo, and the balance not less than 50% of Fe.
Priority Claims (1)
Number |
Date |
Country |
Kind |
59-234981 |
Nov 1984 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 795,777, filed Nov. 7, 1985, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
1538360 |
Smith |
Feb 1919 |
|
4108641 |
Fujioka et al. |
Aug 1978 |
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Foreign Referenced Citations (4)
Number |
Date |
Country |
3300392 |
Jul 1983 |
DEX |
2181891 |
Dec 1973 |
FRX |
5647552 |
Apr 1981 |
JPX |
2073249 |
Oct 1981 |
GBX |
Continuations (1)
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Number |
Date |
Country |
Parent |
795777 |
Nov 1985 |
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