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Method for Alloying Titanium Sponge to Molten Steel

A technology of sponge titanium and titanium alloy, applied in the field of iron and steel smelting, can solve the problems of low titanium yield, high production cost, and high equipment requirements, and achieve the effects of improving titanium yield, saving costs, and not requiring high equipment requirements.

Active Publication Date: 2018-10-23
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: the existing titanium alloying method requires high equipment, high production cost, low titanium yield, etc.

Method used

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  • Method for Alloying Titanium Sponge to Molten Steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1 carries out titanium alloying to molten steel by the method of the present invention

[0042] Use sponge titanium to carry out titanium alloying on molten steel, the specific operation is as follows:

[0043] a. When tapping the converter, when the tapping weight accounts for 1 / 3 of the total tapping weight, add aluminum-iron alloy 3.07kg / t steel, and feed the aluminum wire with constant oxygen on a small platform until the oxygen content in the molten steel is less than 30ppm;

[0044] b. In the LF furnace, add 40TiFe to control the Ti content in molten steel to 0.021%;

[0045] c. Vacuumize the RH furnace, circulate the molten steel for 5 minutes, add sponge titanium for alloying, and add 0.7kg / t steel for 5 minutes;

[0046] d. After step c is completed, blow argon gas at the bottom for 4 minutes, and ensure that the molten steel surface is not exposed during bottom blowing.

[0047] By calculation, the yield of titanium sponge is 79.72%.

Embodiment 2

[0048] Embodiment 2 carries out titanium alloying to molten steel with the method of the present invention

[0049] Use sponge titanium to carry out titanium alloying on molten steel, the specific operation is as follows:

[0050] a. When tapping the converter, when the tapping weight accounts for 1 / 2 of the total tapping weight, add aluminum-iron alloy 2.97kg / t steel, feed the aluminum wire with constant oxygen on a small platform, until the oxygen content in the molten steel is less than 30ppm;

[0051] b. In the LF furnace, add 40TiFe to control the Ti content in molten steel to 0.021%;

[0052] c. Vacuumize the RH furnace, circulate the molten steel for 8 minutes, add sponge titanium for alloying, and add 0.725kg / t steel for 5 minutes;

[0053] d. After step c is completed, blow argon gas at the bottom for 6 minutes, and ensure that the molten steel surface is not exposed during bottom blowing.

[0054] By calculation, the yield of titanium sponge is 80.61%.

Embodiment 3

[0055] Embodiment 3 carries out titanium alloying to molten steel with the method of the present invention

[0056] Use sponge titanium to carry out titanium alloying on molten steel, the specific operation is as follows:

[0057] a. When tapping the converter, when the tapping weight accounts for 1 / 3 of the total tapping weight, add aluminum-iron alloy 3.11kg / t steel, and feed the aluminum wire with constant oxygen on a small platform until the oxygen content in the molten steel is less than 30ppm;

[0058] b. In the LF furnace, add 40TiFe to control the Ti content in molten steel at 0.02%;

[0059] c. Vacuumize the RH furnace, circulate the molten steel for 6 minutes, add sponge titanium for alloying, and add 0.75kg / t steel for 5 minutes;

[0060] d. After step c is completed, blow argon gas at the bottom for 5 minutes, and ensure that the molten steel surface is not exposed during bottom blowing.

[0061] By calculation, the yield of titanium sponge is 88.16%.

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Abstract

The invention belongs to the technical field of iron and steel smelting, particularly relates to a method for alloying molten steel titanium by titanium sponge, and aims to solve the problems that a conventional titanium alloying method demands much on equipment and is high in production cost and low in titanium yield. The method comprises the following steps: a, during tapping of a converter, when the weight of tapped steel accounts for 1 / 3-1 / 2 of the total weight of tapped steel, aluminum iron alloy is added, and oxygen probing and aluminium wire feeding are conducted through a small platform till the content of oxygen in molten steel is smaller than 30 ppm; b, ferrotitanium is added into an LF furnace, and the content of Ti in molten steel is controlled to be 0.01-0.03%; c, an RH furnace is vacuumized, titanium sponge is added for alloying after circular treatment of molten steel for 5-8 min, and treatment is conducted for 5-8 min; and d, after completion of the step c, argon bottom-blowing is conducted for 4-6 min, and the liquid steel surface is not exposed during bottom blowing. The method is simple to operate and demands less on equipment, the titanium yield is improved, the cost is lowered, and high economical benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular relates to a method for alloying titanium sponge with molten steel. Background technique [0002] In low-alloy steel, titanium can form fine and dispersed carbides and refine grains. Titanium carbide can also strongly hinder dislocation slippage when steel is deformed, thereby greatly improving the yield performance of the material. Therefore, many steels One needs to add titanium to the steel for titanium alloying. [0003] Due to the unique resources of vanadium-titanium-magnetite in Panxi area, Panzhihua Iron and Steel Sponge Titanium Factory has a monthly output of 60 tons of sponge titanium, which has high purity, Ti content above 98%, and low impurity content. Compared with traditional titanium The alloying yield of iron is increased from 70% to more than 80%, the cost is lower, and better economic and social benefits can be obtained. [0004] Titanium is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/10C21C7/072C21C7/00
CPCC21C7/0006C21C7/072C21C7/10
Inventor 冉准杨森祥李扬洲张先胜黄德胜解明科
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM