METHOD FOR CENTRIFUGALLY CASTING COMPOSITE STEEL PIPE BY MEANS OF SLAG

WIPO Patent Application WO/2021/142624

A1

Disclosed is a method for centrifugally casting a composite steel pipe by means of slag, the method comprising the following steps: C) casting slag in a molten state into a steel pipe by using a centrifugal casting process; and D) cooling the slag, and forming a glass or glass ceramic lining on the inner surface of the steel pipe, wherein the slag comprises one selected from blast furnace slag and steel slag. Further disclosed is a composite steel pipe manufactured by using the method. According to the method, a wear-resistant and corrosion-resistant glass or glass ceramic lining layer is prepared on the inner surface of the steel pipe by means of a centrifugal casting technique by utilizing molten slag generated in a steelmaking process, and external energy is not needed in the preparation process. The composite steel pipe can be used for conveying corrosive liquids, corrosive liquids containing abrasion particles, and gases, and has a wide application prospect in the fields of metallurgy, ore and chemical engineering.

WO/1991/010627	METAPHOSPHATE GLASS COMPOSITION
WO/2016/142469	ELEMENT CONDUCTING SODIUM IONS FOR USE IN ELECTROCHEMICAL CELLS AND METHOD FOR PRODUCING IT

XI WENJUN (CN)
WANG BAOQIN (CN)
ZHANG ZHIYING (CN)

PCT/CN2020/072040

July 22, 2021

January 14, 2020

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TAIAN TENAHARD NEW MATERAILS TECH CO LTD (CN)
SHANXI ZHONGYANG IRON AND STEEL CO LTD (CN)
XI WENJUN (CN)
WANG BAOQIN (CN)
ZHANG ZHIYING (CN)

C03C10/00; B22D13/02

CN110756759A	2020-02-07
CN1290770A	2001-04-11
CN106082655A	2016-11-09
CN101988614A	2011-03-23
CN102173588A	2011-09-07
CN1302705A	2001-07-11
CN101554652A	2009-10-14
US4005741A	1977-02-01
JPH0615428A	1994-01-25

JINHENG LAW FIRM (CN)

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