CN110592315A

CN110592315A - Combined ladle refining furnace of many materials

Info

Publication number: CN110592315A
Application number: CN201910839732.2A
Authority: CN
Inventors: 洪荣州
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2019-12-20

Abstract

The utility model provides a combined ladle refining furnace of many materials, includes furnace body 1, bell 2, furnace lining 3, transition layer 4 and slag, bell 2 is located the top of furnace body 1, furnace lining 3 is located furnace body 1 inner wall, the internal surface of furnace lining 3 is equipped with transition layer 4, the slag is located the cavity of furnace body 1, furnace lining 3 adopts alkaline material to make, the slag adopts acid material to make, transition layer 4 adopts neutral material to make. Compared with the prior art, the invention has the advantages that: 1. all the advantages of the acid ladle furnace are kept, and the refining cost is reduced; 2. all the advantages of the alkaline ladle furnace are kept, and the refining time is shortened; 3. the material cost is only 37% of that of the alkaline furnace; 4. under the condition of unchanged efficiency and quality, the power consumption, the electrode consumption and the material consumption are all reduced to some extent; 5. because the material contains silicon and has exothermic property, the silicon has the functions of heat preservation and temperature rise, and the refining time is greatly shortened.

Description

Combined ladle refining furnace of many materials

Technical Field

The invention relates to the technical field of steelmaking, in particular to a multi-material combined ladle refining furnace.

Background

The ladle refining furnace is equipment with the heating and refining functions of a steel furnace, is important metallurgical equipment used for refining molten steel melted by a primary smelting furnace (an electric arc furnace, an open hearth furnace and a converter), can adjust the temperature of the molten steel, buffers the process and meets the requirements of continuous casting and continuous rolling, and is one of main equipment for refining outside the furnace.

Because of different properties of furnace linings, slagging materials adopted in the steelmaking process are different. The alkaline furnace uses alkaline material mainly comprising lime to make alkaline slag, and the acid furnace uses material mainly comprising quartz sand to make acid slag. The alkaline ladle refining furnace uses alkaline slag, so that harmful elements such as phosphorus and sulfur in steel can be effectively removed. The acid slag has no capability of removing phosphorus and sulfur, so the acid ladle refining furnace needs to use raw materials with low phosphorus and sulfur, and most ladle refining furnaces in the market mainly adopt alkaline materials, so the cost is over; a small part of the acid ladle refining furnace is used, but the requirement of the acid ladle refining furnace on raw materials is too high.

Disclosure of Invention

In order to integrate the advantages of the two ladle refining furnaces, the invention provides the ladle refining furnace integrating alkalinity, acidity and neutrality.

The utility model provides a combined ladle refining furnace of many materials, includes furnace body 1, bell 2, furnace lining 3, transition layer 4 and slag, bell 2 is located the top of furnace body 1, furnace lining 3 is located furnace body 1 inner wall, the internal surface of furnace lining 3 is equipped with transition layer 4, the slag is located the cavity of furnace body 1, furnace lining 3 adopts alkaline material to make, the slag adopts acid material to make, transition layer 4 adopts neutral material to make.

Preferably, the alkaline material consists of magnesia and dolomite.

Preferably, the acidic material is composed of silica brick, quartz sand and white mud.

Preferably, the neutral material consists of corundum bricks.

Preferably, the mass ratio of the silica brick to the quartz sand to the white mud in the acidic material is as follows: 90-95: 2-5: 1.

compared with the prior art, the invention has the advantages that: 1. all the advantages of the acid ladle furnace are kept, and the refining cost is reduced; 2. all the advantages of the alkaline ladle furnace are kept, and the refining time is shortened; 3. the material cost is only 37% of that of the alkaline furnace; 4. under the condition of unchanged efficiency and quality, the power consumption, the electrode consumption and the material consumption are all reduced to some extent; 5. because the material contains silicon and has exothermic property, the silicon has the functions of heat preservation and temperature rise, and the refining time is greatly shortened.

Drawings

FIG. 1 is a schematic view of the structure of a ladle refining furnace.

Detailed Description

As shown in fig. 1, a multi-material combined ladle refining furnace comprises a furnace body 1, a furnace cover 2, a furnace lining 3, a transition layer 4 and furnace slag, wherein the furnace cover 2 is positioned at the top of the furnace body 1, the furnace lining 3 is positioned on the inner wall of the furnace body 1, the transition layer 4 is arranged on the inner surface of the furnace lining 3, the furnace slag is positioned in a cavity of the furnace body 1, the furnace lining 3 is made of an alkaline material, the furnace slag is made of an acidic material, the transition layer 4 is made of a neutral material, and the transition layer 4 is positioned between the furnace lining 3 and the furnace slag. The alkaline material consists of magnesia and dolomite; the acid material is composed of silica bricks, quartz sand and white mud, the furnace lining 2 is built by the silica bricks, and the quartz sand and the white mud are used as binders; the neutral material consists of corundum bricks, and the proportion of the acidic material, the alkaline material and the neutral material is as follows: 70%: 25%: 5 percent. The mass ratio of the silica bricks, the quartz sand and the white mud in the furnace lining 2 is as follows: 95: 4: 1, the content of SiO2 in the silica brick is not less than 98%, the specification of the quartz sand is 8-16mm, the content of aluminum oxide in the white mud is not less than 35%, and the whiteness is not less than 75.

The principle is as follows: the furnace lining 3 of the ladle refining furnace adopts an acidic material, the slag line adopts an alkaline material, and the transition layer 4 of the acidic material and the alkaline slag line is fused by a neutral material (a comprehensive neutral material mainly containing aluminum, such as corundum bricks) so as to achieve mutual exclusion. The material contains acidic, alkaline and neutral materials, so that harmful elements such as phosphorus and sulfur in steel can be effectively removed, oxygen blowing amount can be reduced, the requirement on scrap steel is low, common steel and high-quality steel can be produced, and the material cost is only 37% of that of an alkaline furnace under the condition of unchanged capacity and quality.

Claims

1. The utility model provides a combined ladle refining furnace of many materials which characterized in that, includes furnace body 1, bell 2, furnace lining 3, transition layer 4 and slag, bell 2 is located the top of furnace body 1, furnace lining 3 is located furnace body 1 inner wall, the internal surface of furnace lining 3 is equipped with transition layer 4, the slag is located the cavity of furnace body 1, furnace lining 3 adopts alkaline material to make, the slag adopts acid material to make, transition layer 4 adopts neutral material to make.

2. The multi-material combination ladle refining furnace of claim 1, wherein the basic material is composed of magnesia and dolomite.

3. The multi-material combination ladle refining furnace of claim 1, wherein the acidic material is composed of silica brick, quartz sand and lime mud.

4. The multi-material combination ladle refining furnace of claim 1, wherein the neutral material is comprised of corundum bricks.

5. The multi-material combined ladle refining furnace according to claim 3, wherein the acidic material is composed of silica bricks, quartz sand and white mud, and the mass ratio of the silica bricks, the quartz sand and the white mud is as follows: 90-95: 2-5: 1.