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Method for improving fluidity of titanium-added deformed steel bars

A rebar and fluidity technology, applied in the field of improving the fluidity of titanium-added rebar, can solve the problems of poor fluidity of titanium-added rebar, and achieve the effects of improving the purity of molten steel and strengthening slag-forming and deoxidation.

Pending Publication Date: 2021-03-30
ZHANGJIAGANG HONGCHANG STEEL PLATE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is: in order to solve the problem of poor fluidity of titanium-added rebar, provide a method for improving the fluidity of titanium-added rebar

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The temperature of the molten steel when the ladle leaves the station is controlled between 1500°C and 1600°C.

Embodiment 2

[0027] The fuel injected into the blast furnace is coke.

Embodiment 3

[0029] The mass content of the sintered ore in the charge is 74%-78%, the mass content of the lump ore in the charge is 4%-8%, the mass content of coke in the charge is 6%-8%, and the mass content of the limestone lump in the charge is The mass content of the furnace charge is 2%-4%, and the mass content of the pellets in the furnace charge is 14%-20%.

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PUM

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Abstract

The invention discloses a method for improving fluidity of titanium-added deformed steel bars, and relates to the field of converter steelmaking. The method comprises the following steps of 1, steelmaking: putting coke, sintered ore, lump ore and limestone into a blast furnace, and roasting to obtain molten pig iron; 2, steel melting: carbon and phosphorus in the pig iron water are removed; 3, deoxidizing: releasing the rare earth elements in the form of oxides through oxygen blowing and decarburization, and adding a deoxidizing agent in the tapping process after converter end point smelting is completed; 4, feeding: adding titanium into the blast furnace through a feeding mechanism to reduce inclusions; and 5, refining: carrying out calcium treatment on the molten steel in the later stageof refining smelting to improve the inclusion form. According to the method, slagging and deoxidizing in the smelting process of the refining furnace are enhanced, meanwhile, the adding time of alloyed ferrotitanium is defined, inclusions of molten steel are subjected to denaturation treatment, the soft stirring effect before refining tapping is enhanced, and the purity of the molten steel is effectively improved.

Description

technical field [0001] The invention relates to the field of converter steelmaking, in particular to a method for improving the fluidity of titanium-added rebar. Background technique [0002] The main alloys of the original rebar are silicon-manganese, ferrosilicon, and vanadium-nitrogen. As the price of vanadium-nitrogen alloys rises, the cost of rebar alloys rises sharply. [0003] In order to achieve the goal of reducing the cost of the alloy, the composition of the process is now changed, and the cost of the alloy is reduced by adding ferro-titanium instead of vanadium, but it brings about the problem of poor fluidity of molten steel and affects pouring. Through continuous improvement, the workshop has formed a special production method to solve the problem. The problem of pourability of molten steel is solved, and the normal production of this steel type is ensured. Contents of the invention [0004] The purpose of the present invention is: in order to solve the prob...

Claims

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Application Information

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IPC IPC(8): C21C7/00C21C7/06C21C7/068C21C7/076C22C33/06
CPCC21C7/06C21C7/068C21C7/076C21C7/0006C22C33/06Y02P10/20
Inventor 陈学应高峰沈青松胡军孙惠东李行
Owner ZHANGJIAGANG HONGCHANG STEEL PLATE CO LTD