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Titanium slag furnace by-product smelting low-carbon industrial pure iron and method thereof

A technology for industrial pure iron and by-products, which is applied in the field of iron and steel smelting, can solve the problem that carbon content cannot be controlled stably, and achieves the effect of solving the problem of high added value utilization, simple production process and good product quality.

Active Publication Date: 2019-02-15
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that molten iron, a by-product of smelting high-titanium slag, cannot be reused for smelting low-carbon industrial pure iron because its carbon content cannot be stably controlled at a low level.

Method used

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Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1 Smelting low-carbon industrial pure iron with the technical scheme of the present invention

[0039] After the molten iron is discharged from the titanium slag furnace, the molten iron is mixed into the electric furnace. After the electric furnace heats up the molten iron to a temperature of 1520°C, the furnace door oxygen lance is used to blow oxygen to decarburize, phosphorus, silicon, and manganese. The oxygen flow rate of the oxygen lance is controlled at 0.05Nm 3 / (t min), after blowing oxygen for 40 minutes, the carbon of the molten iron is reduced to 0.016%, and the phosphorus is 0.003%. After the temperature reaches 1680°C, the molten iron is tapped into the ladle, and the ladle is transported to the LF processing station; LF The furnace uses high-basic calcium aluminate refining slag for deep desulfurization. After the sulfur content of the molten iron drops below 0.005%, it is transferred to a VD furnace equipped with iron oxide scale. Vacuum decar...

Embodiment 2

[0040] Embodiment 2 Smelting low-carbon industrial pure iron with the technical scheme of the present invention

[0041] After the molten iron is discharged from the titanium slag furnace, the molten iron is mixed into the electric furnace. After the electric furnace heats up the molten iron to a temperature of 1550°C, the furnace door oxygen lance is used to blow oxygen for decarburization, phosphorus, silicon, and manganese. The oxygen flow rate of the oxygen lance is controlled at 0.20Nm 3 / (t min), after blowing oxygen for 20 minutes, the carbon of the molten iron is reduced to 0.021%, and the phosphorus is 0.004%. After the temperature reaches 1700°C, the molten iron is tapped into the ladle, and the ladle is transported to the LF processing station; The furnace uses high-basic calcium aluminate refining slag for deep desulfurization. After the sulfur content of the molten iron drops below 0.005%, it is transferred to a VD furnace equipped with iron oxide scale. Vacuum de...

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Abstract

The invention belongs to the field of steel smelting, and particularly relates to a low-carbon ingot iron smelted by by-products of a titanium slag furnace and a method for smelting the low-carbon ingot iron by the by-products of the titanium slag furnace. In order to solve the problems that the carbon content of molten iron as the by-products in smelting of high titanium slag cannot be stably controlled to be below 0.01%, and the low-carbon ingot iron cannot be smelted, the invention provides the method for smelting the low-carbon ingot iron by the by-products of the titanium slag furnace. The molten iron is heated and deoxidized by an electric furnace, after iron is discharged from the electric furnace, LF deep decarbonization is carried out, after desulfurized slag is removed, the molten iron is placed in a VD furnace and then is subjected to vacuum deep decarbonization, before VD decarbonization, iron oxide scale is added and used as an oxidizing agent, after decarbonization is finished, aluminium deoxidation is carried out, carbon, silicon, manganese, phosphorus and sulfur are effectively removed from the molten iron, and the carbon content is stably controlled at relatively low level to obtain the low-carbon ingot iron. The production process is simple, requirements of equipment are not high, the quality of obtained products is good, and a mode of using the by-products of the titanium slag furnace at high added-value is provided.

Description

technical field [0001] The invention belongs to the field of iron and steel smelting, and in particular relates to a method for smelting low-carbon industrial pure iron by a by-product of a titanium slag furnace. Background technique [0002] Pure iron is a very soft metal with a silver-white metallic luster. Industrial pure iron is a kind of steel. Its chemical composition is mainly iron, with a content of 99.50-99.90%, and a carbon content below 0.04%. The less other elements, the better. it is good. Because it is not actually pure iron, this kind of steel that is close to pure iron is called industrial pure iron. Generally, industrial pure iron is very soft in texture, extremely tough, and has good electromagnetic properties. There are two common specifications, one is used as a deep drawing material, which can be stamped into extremely complex shapes; the other is used as an electromagnetic material, which has high magnetic sensitivity and low magnetic resistance, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B11/10C21C1/02C21C1/04
CPCC21B11/10C21C1/02C21C1/04
Inventor 陈炼陈小勇戈文荪曾建华叶良宇张峰吴相权王建
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP