CN111707091A

CN111707091A - Alloy heating furnace

Info

Publication number: CN111707091A
Application number: CN202010704881.0A
Authority: CN
Inventors: 韩景文
Original assignee: Foshan Jingjia Electromechanical Equipment Co ltd
Current assignee: Foshan Jingjia Electromechanical Equipment Co ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2020-09-25

Abstract

The invention discloses an alloy heating furnace, which comprises a vertical kiln body, wherein the kiln body is provided with a feeding hole at the top and a discharging hole at the bottom, and is characterized in that: a combustion pipeline extending from the top to the bottom is fixed in the center of the kiln body, a material channel capable of containing alloy block materials to be filled and fall is arranged between the combustion pipeline and the kiln body, a combustor is installed at the top of the combustion pipeline, and a smoke exhaust pipeline is connected to the top of the kiln body. The alloy heating furnace can heat the alloy by utilizing the surplus coal gas of a factory, preheat the alloy and then add the preheated alloy into the steelmaking furnace, thereby effectively improving the turnover frequency of the steelmaking furnace, shortening the tapping time, improving the production efficiency, saving the production cost and improving the economic benefit.

Description

Alloy heating furnace

Technical Field

The invention relates to the technical field of heating furnaces for heating block materials, in particular to a heating furnace for heating alloy block materials.

Background

Many large-scale iron and steel enterprises have iron-making blast furnaces, and a large amount of blast furnace gas is generated in the production process. At present, blast furnace gas is generally combusted to generate power after being cooled, filtered and dedusted and pressurized. In fact, primary energy (blast furnace gas) is transformed into secondary energy (electric energy). However, the alloy is often added to adjust the molten steel components in the steel making process of an electric arc furnace and an intermediate frequency furnace in a steel plant, and if the blast furnace gas can be directly used for preheating the alloy and then adding the alloy into the electric furnace, the turnover frequency of the electric furnace can be greatly improved, the tapping time can be shortened, the production efficiency can be improved, the production cost can be saved, and the economic benefit can be improved. However, because no proper heating furnace is available in the past, the heating efficiency is not high, so that the alloy preheated by blast furnace gas is not well applied and is not widely popularized. The present invention has been developed in response to this need.

Disclosure of Invention

The invention aims to provide a heating furnace which can heat alloy blocks by utilizing a large amount of surplus blast furnace gas generated by a steelmaking blast furnace.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides an alloy heating furnace, is including the vertical kiln body, and the kiln body has the feed inlet at top and the discharge gate of bottom, its characterized in that: a combustion pipeline extending from the top to the bottom is fixed in the center of the kiln body, a material channel capable of containing alloy block materials to be filled and fall is arranged between the combustion pipeline and the kiln body, a combustor is installed at the top of the combustion pipeline, and a smoke exhaust pipeline is connected to the top of the kiln body.

On the basis, the bottom of the kiln body is arranged into a funnel shape, and a flange support frame for supporting a combustion pipeline is arranged on the inner wall of the funnel of the kiln body.

And the funnel kiln wall of the kiln body is provided with a plurality of treatment holes for treating the arching of the alloy lump materials.

The combustion pipeline comprises a high-temperature resistant shell and an inner wall made of refractory materials.

The high-temperature resistant shell is formed by splicing a plurality of sections, and the heat-resistant temperature of each section is gradually increased from top to bottom in a gradient manner.

The periphery of the burner at the top of the kiln body forms an operation table.

The operating platform is circumferentially provided with a plurality of blanking pipes for alloy block materials to fall to the kiln body material channel, the upper ends of all the blanking pipes are connected with a distribution bin, the center in the distribution bin is provided with a guide cone for dispersing the alloy block materials to fall all around, a feeding valve is arranged at a feeding port at the top of the distribution bin, and a feeding port arranged above the distribution bin is opposite to a storage bin of the feeding valve.

And a vibrator which is favorable for discharging is arranged on the side wall of the discharge port of the kiln body.

And a discharge valve is arranged at a discharge port of the kiln body, and a discharge conveyer belt is arranged below the discharge valve.

The section of the main body section of the kiln body material channel is designed to be gradually enlarged from top to bottom.

The invention has the following beneficial effects: the alloy heating furnace can heat the alloy by utilizing the surplus coal gas of a factory, preheat the alloy and then add the preheated alloy into the steelmaking furnace, thereby effectively improving the turnover frequency of the steelmaking furnace, shortening the tapping time, improving the production efficiency, saving the production cost and improving the economic benefit.

Drawings

FIG. 1 is a schematic structural view of an alloy heating furnace of the present invention.

Detailed Description

As shown in figure 1, the alloy heating furnace comprises a vertical kiln body 1, wherein the kiln body 1 is provided with a feeding hole at the top and a discharging hole at the bottom. In the invention, a combustion pipeline 2 extending from the top to the bottom is fixed at the center of the kiln body 1, a material channel 3 capable of containing alloy block materials to be filled and fall is arranged between the combustion pipeline 2 and the kiln body 1, a burner 4 is installed at the top of the combustion pipeline 2, and a smoke exhaust pipeline 5 is connected at the top of the kiln body 1.

The alloy lump material enters from the top feed port of the kiln body 1 and is filled in the material channel. And igniting the combustor 4, and spraying the coal gas and the combustion-supporting air into the combustion pipeline 2 from the combustor for combustion. The high-temperature flue gas after burning enters the material channel 3 from the bottom end of the burning pipeline 2, heats the alloy blocks in the material channel, and finally the flue gas which is absorbed most of heat by the alloy is pumped out from the smoke exhaust pipeline 5. And discharging the alloy blocks from a bottom discharge port of the kiln body after the alloy blocks are heated to the required temperature. The combustion pipe 2 can provide enough combustion space for the combustor 4, ensure complete, sufficient and stable combustion, avoid flameout and backfire, and the like, and the combustion efficiency can reach more than 98%. And the heat of the high-temperature flue gas after combustion can be fully absorbed by the alloy blocks and then discharged from the smoke discharge pipeline 5, so that the overall heat efficiency of the whole kiln can reach about 80%. The smoke exhaust pipeline 5 is a negative pressure exhaust pipeline, so that the kiln body can be always in a negative pressure running state, and the phenomena of gas leakage and the like can be avoided. The temperature distribution in the kiln body material channel 3 is gradually decreased from bottom to top, the alloy blocks are fed at low temperature and discharged at high temperature, and the temperature of the alloy blocks during discharging can be accurately controlled.

Furthermore, the bottom of the kiln body 1 is arranged into a funnel shape, and a flange support frame 6 for supporting the combustion pipeline 2 is installed on the inner wall of the funnel of the kiln body. The flange support 6 provides support for the combustion conduit 2 and, at the same time, provides a passage for the alloy slug to fall through.

In order to prevent the alloy blocks from arching at the bottom, a plurality of handling holes 7 for handling the arching of the alloy blocks can be arranged on the wall of the funnel kiln of the kiln body 1. The operator can perform arch breaking operation on the arched alloy blocks through the disposal holes 7.

In particular, the combustion conduit 2 comprises a refractory outer casing 2.1 and an inner wall 2.2 made of refractory material. The high temperature resistant shell 2.1 is formed by splicing a plurality of sections, and the heat resistant temperature of each section is gradually increased from top to bottom. This further reduces the cost of the furnace.

Further, a table 8 is formed around the burner 4 at the top of the kiln body 1. A plurality of blanking pipes 9 for alloy block materials to fall to the kiln body material channel 3 are circumferentially distributed on the operating platform 8, the upper ends of all the blanking pipes 9 are connected with a distribution bin 10, a guide cone 11 for scattering the alloy block materials to fall around is arranged in the center of the distribution bin 10, a feeding valve 12 is arranged at a feeding port at the top of the distribution bin 10, and a feeding port arranged above the distribution bin 10 is opposite to a bin 13 of the feeding valve 12. The side wall of the discharge hole of the kiln body 1 is provided with a vibrator 14 which is beneficial to discharging. A discharge valve 15 is arranged at the discharge hole of the kiln body 1, and a discharge conveyer belt 16 is arranged below the discharge valve 15.

In order to prevent the furnace body from being damaged and the lump material from arching due to the thermal expansion of the alloy lump material in the heating process of the material channel 3, the section of the main body section 3.1 of the furnace body material channel 3 can be gradually enlarged from top to bottom so as to provide a space for the thermal expansion of the alloy lump material. Of course, the expansion degree does not need to be too large, and only needs to be slightly expanded according to the thermal expansion coefficient of the alloy blocks, and the main body section (namely, the main straight section filled with the alloy blocks) of the whole material channel 3 is in a conical ring shape, so as to ensure that the alloy blocks can freely fall down after being heated in the material channel 3.

Claims

1. The utility model provides an alloy heating furnace, is including the vertical kiln body, and the kiln body has the feed inlet at top and the discharge gate of bottom, its characterized in that: a combustion pipeline extending from the top to the bottom is fixed in the center of the kiln body, a material channel capable of containing alloy block materials to be filled and fall is arranged between the combustion pipeline and the kiln body, a combustor is installed at the top of the combustion pipeline, and a smoke exhaust pipeline is connected to the top of the kiln body.

2. The alloy heating furnace according to claim 1, wherein: the bottom of the kiln body is arranged into a funnel shape, and a flange support frame for supporting a combustion pipeline is arranged on the inner wall of the funnel of the kiln body.

3. The alloy heating furnace according to claim 1, wherein: and the funnel kiln wall of the kiln body is provided with a plurality of treatment holes for treating the arching of the alloy lump materials.

4. The alloy heating furnace according to claim 1, wherein: the combustion pipeline comprises a high-temperature resistant shell and an inner wall made of refractory materials.

5. The alloy heating furnace according to claim 1, wherein: the high-temperature resistant shell is formed by splicing a plurality of sections, and the heat-resistant temperature of each section is gradually increased from top to bottom in a gradient manner.

6. The alloy heating furnace according to claim 1, wherein: the periphery of the burner at the top of the kiln body forms an operation table.

7. The alloy heating furnace according to claim 6, wherein: the operating platform is circumferentially provided with a plurality of blanking pipes for alloy block materials to fall to the kiln body material channel, the upper ends of all the blanking pipes are connected with a distribution bin, the center in the distribution bin is provided with a guide cone for dispersing the alloy block materials to fall all around, a feeding valve is arranged at a feeding port at the top of the distribution bin, and a feeding port arranged above the distribution bin is opposite to a storage bin of the feeding valve.

8. The alloy heating furnace according to claim 1, wherein: and a vibrator which is favorable for discharging is arranged on the side wall of the discharge port of the kiln body.

9. The alloy heating furnace according to claim 1, wherein: and a discharge valve is arranged at a discharge port of the kiln body, and a discharge conveyer belt is arranged below the discharge valve.

10. An alloy heating furnace according to any one of claims 1 to 9, characterized in that: the section of the main body section of the kiln body material channel is designed to be gradually enlarged from top to bottom.