Contents
1 General Provisions 1
2 Terms 1
3 Melted iron pretreatment 2
3.1 Overall technological design 2
3.2 Powder 3
3.3 Design requirements of major equipment 4
3.4 Process layout 4
4 Converter steelmaking 5
4.1 Overall technological design 5
4.2 Raw material supply 8
4.3 Model selection of converter and relevant equipments 9
4.4 Converter steelmaking workshop layout and plant building 10
4.5 Slag disposal 12
5 Electric furnace steelmaking 12
5.1 Overall technological design 12
5.2 Raw material supply 16
5.3 Selection of main process equipments 18
5.4 Layout and plant building of electric furnace steelmaking workshop 19
5.5 Slag disposal 21
6 External refining facilities 22
6.1 Overall technological design 22
6.2 Iron alloy and slagmaking material 25
6.3 Design requirements of main body equipments for external refining 25
6.4 Principles on layout of external refining devices in workshop 27
Wording Explanation 28
1.0.1 This standard is formulated with a view to making the steelmaking technology design to follow out the national economic policy and technical policy, and making the steelmaking engineering construction to be of advanced technology, economy and rationality, energy conservation, environmental protection and safety and usability.
1.0.2 This standard is applicable to the technological design of steelmaking plant for which converter and electric arc furnace are mainly used.
1.0.3 The steelmaking technology design shall meet the requirements of the current relevant national standard and codes, besides this standard.
2.0.1 Consteel electric arc furnace
Ultrahigh-power electric furnace into which the steel scrap preheated with hot gas are added continuously
2.0.2 VD, Vacuum Degassing
A vacuum degassing device for molten steel, which can place the molten steel ladle in a closed vacuum container connected with the vacuum pump, and supply argon gas from the ladle bottom to stir molten steel and make the degassing reaction of molten steel at vacuum state
2.0.3 VOD, Vacuum Oxygen Decarburization
A vacuum oxygen decarburization refining device for refining stainless steel, which adds a oxygen core lance on the cover of the VD vacuum container to blow oxygen onto the molten steel surface in the vacuum container and to conduct the "decarbonization and chromium reserving" refining for chromium molten steel
2.0.4 CAS-OB, Composition Adjustments by Sealed argon bubbling and Blowing Oxygen
A device which uses the oxidation heat generated by metal (aluminium) burning to heat molten steel, or adds alloy in the immersion hood to adjust the composition of the molten steel
2.0.5 RH, Rheinstahl Huttenwerk Heraus
A vacuum degassing method that two refractory tubes on the vacuum container bottom are inserted into the molten steel, a refractory tube leads argon gas inside and causes density difference of two molten steel in two tubes, which results in the upward and downward circulation flow (Degassing reaction) of molten steel in ladle and vacuum container
2.0.6 RH-KTB, Rhcinstahl Huttenwerk Heraus-Kawasaki Top Blowing
A method that an oxygen core lance is inserted from the vacuum container top to blow oxygen onto the molten steel for decarbonization, which is used for refining ultra low carbon steel and stainless steel
2.0.7 LF, Ladle Furnace
A furnace in which the argon is blown from the ladle bottom at atmospheric pressure and the electric arc is used to heat the molten steel for making the composition and temperature of the molten steel accurate and uniform
2.0.8 AOD, Argon Oxygen Decarburization
A refining furnace, arranged on the side of the molten steel molten pool of a converter, which blow oxygen and argon gas at different proportion into the molten steel for smelting stainless steel
