Process utilizing sheet billet continuous casting to manufacture low aluminum silicon calm carbon structural steel
A technology of thin slab continuous casting and silicon-killed carbon, which is applied in the field of iron and steel smelting technology, can solve the problems of long production cycle, increased manufacturing cost, and excess product functions, and achieve excellent quality, small liquid level fluctuations, and reduced production costs. Effect
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[0013] The present invention will be further illustrated by the following examples.
[0014] In the embodiment, the process flow for producing low-aluminum-silicon killed carbon structural steel by thin slab short process is: blast furnace hot metal→converter smelting→LF refining→thin slab continuous casting.
[0015] Example converter 150t, LF refining 150t, thin slab continuous casting: continuous casting slab width 1250-1500mm, thickness 65mm, production of low-aluminum silicon killed carbon structural steel, a total of six examples.
[0016] The specific operation steps and process parameter control of each process are as follows:
[0017] (1) Converter smelting process
[0018] a. The temperature of molten iron is 1350℃, S=0.030%, P=0.120%;
[0019] b. The main goal of the conversion process is dephosphorization, and the slagging process is required to increase the furnace temperature steadily;
[0020] c. Final slag basicity R is 3.0-3.5, molten steel composition (mass percentage) C...
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