CN211546596U

CN211546596U - Online alloy baking equipment for converter

Info

Publication number: CN211546596U
Application number: CN201922467470.XU
Authority: CN
Inventors: 郭森林; 刘建勇; 陈顺均; 张世杰; 郝赫
Original assignee: Xinxing Ductile Iron Pipes Co Ltd
Current assignee: Xinxing Ductile Iron Pipes Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-09-22
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses an online alloy of converter toasts equipment relates to metallurgical equipment technical field, including toasting the stove furnace body, the alloy charge door, the feed opening, the nozzle, the flue, combustion-supporting pipeline and gas pipeline, still including setting up the branch flitch that sets up at the inside slope of toasting stove furnace body die cavity, the branch material mouth of setting passing branch flitch thickness on dividing the flitch plate surface, fixed connection is at the branch material baffle of branch flitch both sides edge, set up the collecting box under the branch material mouth, the width and the area of branch material mouth are by last under to progressively increase, the nozzle is located under the branch flitch least significant end. The utility model discloses a to the screening of the alloy raw materials of different volume sizes, concentrated the key position of gas heating, reduced the time of drying to the alloy. The alloy added into the baking furnace is heated and baked, so that the water in the alloy is effectively removed, the tapping temperature drop of the converter is reduced, the alloy and the molten steel are fully fused, and the quality of steel is improved.

Description

Online alloy baking equipment for converter

Technical Field

The utility model belongs to the technical field of the metallurgical equipment technique and specifically relates to an online alloy of converter toasts equipment.

Background

In the steel-making process, in order to ensure various physical and chemical properties of steel, the operation of adding alloying additives to steel to adjust the components thereof to a prescribed range is called molten steel alloying. The alloy additives commonly used in steel making are ferroalloys, such as ferromanganese, ferrosilicon, ferrovanadium, ferrochrome, etc., and are generally added into a ladle when tapping from a converter.

The iron alloy contains free water and crystal water, and if the free water and the crystal water are not removed, the H, O content in the steel is increased, H, O is a harmful element, the performance of the steel is adversely affected, and particularly, the effect is obvious when the addition amount of the alloy is large, and the alloy needs to be removed. The ferroalloy is heated to more than 200 ℃ to remove ferroalloy free water, and the ferroalloy is heated to 400-600 ℃ to remove crystal water in the ferroalloy.

The baking of the ferroalloy generally comprises an off-line baking mode and an on-line baking mode. Most steel mills adopt an alloy off-line baking mode. Off-line roasting can effectively remove moisture in the alloy, but can generate heat loss, thereby generating larger temperature drop for molten steel. The alloy on-line baking is an alloy heating mode which is gradually popularized and used in steel mills in recent years.

Alloy roasting devices using a crawler-type conveyor also exist, but are prone to damage to the conveyor. The existing alloy baking device is difficult to uniformly heat alloy materials with different sizes, and when small-size alloys are dried and large-size alloys need to be continuously heated, the heating time is prolonged, and heating raw materials are wasted.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an online alloy of converter toasts equipment is provided, realizes concentrating the key position of gas heating to the screening of the alloy raw materials of not unidimensional size, increases heating efficiency, reduces the time to the alloy stoving. An on-line alloy baking furnace is arranged behind the converter furnace, and the alloy added in the baking furnace is heated and baked, so that the water in the alloy is effectively removed, the temperature drop of the converter tapping is reduced, the alloy and the molten steel are fully fused, the quality of steel is improved, and the cost reduction and the efficiency improvement are realized.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

the utility model provides an online alloy of converter toasts equipment, including toasting the stove furnace body, the alloy charge door, the feed opening, the nozzle, the flue, combustion-supporting pipeline and gas pipeline, still including setting up the branch flitch that sets up in the slope of toasting stove furnace body die cavity inside, the setting is at the branch material mouth that passes branch flitch thickness on dividing the flitch surface, fixed connection divide flitch both sides edge with divide flitch surface mutually perpendicular's branch material baffle, set up the collecting box under dividing the material mouth, the width and the area of branch material mouth are by last under to progressively increasing, the setting is under the nozzle that toasts stove furnace body die cavity inside is located branch flitch least significant end.

The utility model discloses technical scheme's further improvement lies in: and a burner baffle is arranged in the baking furnace body cavity above the burner.

The utility model discloses technical scheme's further improvement lies in: the aggregate box comprises a side wall, an aggregate box bottom plate and an aggregate baffle plate which is fixedly connected to the aggregate box bottom plate and is vertically arranged.

The utility model discloses technical scheme's further improvement lies in: the collecting box bottom plate further comprises an opening, a movable plate and a movable plate locking device, wherein the movable plate is hinged to the collecting box bottom plate and matched with the opening.

The utility model discloses technical scheme's further improvement lies in: the aggregate box bottom plate further comprises an opening, a horizontal sliding groove and a movable plate arranged in the horizontal sliding groove.

The utility model discloses technical scheme's further improvement lies in: the material guide baffle is fixedly connected to the lower surface of the material distribution plate and is arranged between the adjacent material distribution ports in a vertical mode.

The utility model discloses technical scheme's further improvement lies in: the number of the burners is 4-5.

The utility model discloses technical scheme's further improvement lies in: the upper surface of the material distributing plate is provided with salient points for increasing friction force.

Due to the adoption of the technical scheme, the utility model discloses the technological progress who gains is:

the utility model discloses a to the screening of the alloy raw materials of different volume sizes, concentrated the key position of gas heating, increased heating efficiency, reduced the time to the alloy stoving. The online alloy baking furnace is arranged behind the converter furnace, and is used for heating and baking the alloy added into the baking furnace, so that the moisture in the alloy can be effectively removed, the temperature drop of the converter tapping is reduced, the alloy and the molten steel are fully fused, the quality of steel is improved, and the cost reduction and the efficiency improvement are realized.

The alloy is heated in the baking furnace to remove free water and crystal water in the alloy, thereby effectively reducing H, O brought into molten steel by the alloy and ensuring the quality of steel. The heated alloy is directly poured into a steel ladle, and the alloy and the molten steel are fully stirred and melted and fully and uniformly fused. Meanwhile, molten steel cooling caused by adding the alloy is reduced, compared with the condition that the alloy is not heated, the molten steel cooling degree is reduced, and the molten steel cooling is reduced by more than 15 ℃. The temperature drop of the molten steel is reduced, and the cost is indirectly reduced.

Divide the material baffle to prevent that alloy raw materials from dividing the irregular roll-off of both sides of flitch from dividing the flitch in-process that falls, guaranteed that alloy raw materials from dividing material mouthful department and dividing the flitch end to fall. The width and the area of the material distribution port are gradually increased from top to bottom, so that alloy raw materials fall into the material collecting box from the material distribution port from the upper part to the lower part of the material distribution plate one by one according to the size of granularity, the screening is automatically completed, and the sorting efficiency is improved. The burner is located under the flitch minimum, is favorable to heating the massive alloy raw materials, improves drying efficiency. The burner baffle prevents the falling alloy raw material from damaging the burner, and prolongs the service life of the burner. The material guide baffle prevents irregular falling body movement of the alloy raw materials in the falling process from the material distributing opening, controls the falling point position of the alloy raw materials, and controls the final heating position of the alloy raw materials.

The opening on the bottom plate of the aggregate box and the opening control device facilitate the process of directly discharging the alloy raw materials out of the cavity of the oven body, and the operation is simplified. The upper surface of the material distributing plate is provided with the salient points for increasing the friction force, so that the control on the sliding speed of the alloy raw material is facilitated.

The nozzle is provided with 4 ~ 5 degrees that are favorable to the control heating, prevents the waste of fuel, and this alloy heating bakes out stove area little, has 4 ~ 5 nozzles to bake to the alloy concurrent heating on the furnace body, in 10 ~ 12 minutes, can heat the alloy in the bakes out the stove to more than 500 ~ 600 ℃. Because the burners are arranged at different heights and different angles, the alloy heating temperature is more uniform.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a sectional view of the internal cavity structure of the present invention;

the device comprises an alloy chute, a baking furnace bracket, a burner, a combustion-supporting air branch pipe, a coal gas branch pipe, a combustion-supporting air main pipe, a coal gas main pipe, a flue, a gas ring pipe, a coal gas ring pipe, a combustion-supporting air ring pipe, 11, an alloy charging port, 12, a baking furnace body, a discharging port, a gas valve, a combustion-supporting air valve, 16, a converter body, a discharging port, a discharging baffle, a collecting baffle, a.

Detailed Description

The present invention will be described in further detail with reference to the following examples:

as shown in fig. 1, 2 and 3, the online alloy baking equipment for the converter comprises a baking furnace body 12, an alloy charging port 11, a discharging port 13, a burner 3, a flue 8, a combustion-supporting pipeline and a gas pipeline, and further comprises a material distribution plate 17, a material distribution port 18, a material distribution baffle 19, a material guide baffle 20 and an aggregate box 22, wherein the material distribution plate 17 is arranged inside a cavity of the baking furnace body 12, the inner side wall surface of the material distribution plate 17 is fixedly connected with the inner side wall surface of the baking furnace body, and the material distribution plate 17 is obliquely arranged. The material distributing opening 18 is arranged on the surface of the material distributing plate 17, and the material distributing opening 18 penetrates through the thickness of the material distributing plate 17. The material distributing baffle plate 19 is fixedly connected to the two side edges of the material distributing plate 17, the material distributing baffle plate 19 is perpendicular to the surface of the material distributing plate 17, and the width and the area of the material distributing opening 18 are gradually increased from top to bottom. The material collecting box 22 is arranged under the material distributing port 18, the burner 3 arranged in the cavity of the oven body 12 is arranged under the lowest end of the material distributing plate 17 and just faces to the massive material, the burner baffle 24 is arranged above the burner 3, and 4-5 burners 3 are arranged. The material guide baffle 20 is fixedly connected to the lower surface of the material distributing plate 17, the material guide baffle 20 is arranged between the adjacent material distributing openings 18, and the material guide baffle 20 is vertically arranged. The gas pipeline comprises a combustion-supporting air main pipe 6, a combustion-supporting air ring pipe 10 and a combustion-supporting air branch pipe 4, and the combustion-supporting pipeline comprises a gas main pipe 7, a gas ring pipe 9 and a gas branch pipe 5.

The upper surface of the material distributing plate 17 is provided with salient points for increasing friction force, the friction force of the surface of the material distributing plate 17 can be increased when the material distributing plate is smoked, and the salient points are increased if the friction is still insufficient.

The material collecting box 22 is fixedly connected to the bottom of the inner cavity of the oven body 12 of the baking oven, the material collecting box 22 comprises a side wall, a material collecting box bottom plate 23, a material collecting baffle plate 21 and an opening control device, the material collecting baffle plate 21 is fixedly connected to the material collecting box bottom plate 23, and the material collecting baffle plate 21 is vertically arranged. The opening control device has two types, one is a movable plate locking device, and the other is a horizontal sliding groove. In the first case, the collecting box bottom plate 23 further comprises an opening, the collecting box bottom plate 23 and a movable plate locking device, the collecting box bottom plate 23 is hinged on a movable plate matched with the opening on the collecting box bottom plate 23, the movable plate locking device is triggered, the movable plate swings downwards to expose the opening, and the alloy material falls. In the second case, the bottom plate 23 further includes an opening, a horizontal sliding groove, and a movable plate disposed in the horizontal sliding groove, and the alloy material falls from the opening when the movable plate is pulled.

The whole process comprises the steps of weighing various ferroalloys required by each furnace respectively, then loading the ferroalloys into a forklift hopper, conveying the ferroalloys to an alloy baking furnace by a forklift, then adding the ferroalloys into a baking furnace body 12 from an alloy feeding port 11, and starting a combustion-supporting fan under the control of a touch screen. During normal production, the combustion fan is in a normally open state. Combustion-supporting air enters a combustion-supporting air ring pipe 10 through a combustion-supporting air main pipe 6, then flows to the burner 3 through a combustion-supporting air branch pipe 4, and the size of the combustion-supporting air can be adjusted by adjusting a combustion-supporting air valve 15; when the gas valve is opened under the control of the touch screen, gas enters the gas ring pipe 9 through the gas main pipe 7 and then flows to the burner 3 through the gas branch pipe 5, and the gas size can be adjusted by adjusting the gas valve 14. The coal gas and the combustion-supporting air are fully mixed in the burner 3, the mixed gas is ignited by an automatic igniter in the burner 3, and the combustion gas is sprayed out of the burner 3 to directly heat and bake the alloy. There are 4 ~ 5 nozzles 3 on the alloy roaster, to the alloy heating simultaneously, the flue gas that the burning produced is arranged 8 outward through the flue. The heating time of the alloy can be manually set, and the heating temperature can be displayed on a touch screen through a thermocouple on the furnace body. The combustion-supporting air valve and the gas valve are adjusted to proper positions in advance, a post worker only needs to press a heating button on a touch screen, the alloy baking furnace automatically heats and automatically stops after a set time, and one-key operation can be realized.

When the converter taps steel, the feed opening switch button 13 is pressed, and the alloy is poured into the ladle through the alloy chute 1. Thus, the alloy heating and baking of one heat is completed.

The device is arranged behind a converter, the dosage of each ferroalloy is calculated according to the amount of molten iron in each converter, then the ferroalloy is added into a baking furnace, the alloy is heated and baked while the converter is smelting, the water in the alloy is removed, the ferroalloy is added into a ladle when the converter taps, the tapping temperature drop of the converter is reduced, the alloy and the molten steel are fully fused, the quality of steel is improved, and therefore the purposes of cost reduction and efficiency improvement are achieved.

Claims

1. The utility model provides an online alloy of converter toasts equipment, includes toasting stove furnace body (12), alloy charge door (11), feed opening (13), nozzle (3), flue (8), combustion-supporting pipeline and gas pipeline, its characterized in that: still including setting up branch flitch (17) of the inside slope setting of baking furnace body (12) die cavity, set up on branch flitch (17) surface and pass branch flitch (17) thickness divide material mouth (18), fixed connection divide flitch (17) both sides edge with divide flitch (17) surface mutually perpendicular's branch baffle (19), set up collection box (22) under branch material mouth (18), divide the width and the area of material mouth (18) by last under to and progressively increase, set up under baking furnace body (12) die cavity inside nozzle (3) are located branch flitch (17) least significant end.

2. The on-line alloy baking equipment of the converter according to claim 1, characterized in that: and a burner baffle (24) is arranged in a cavity of the baking furnace body (12) above the burner (3).

3. The on-line alloy baking equipment of the converter according to claim 1, characterized in that: the material collecting box (22) comprises a side wall, a material collecting box bottom plate (23) and a vertically arranged material collecting baffle plate (21) fixedly connected to the material collecting box bottom plate (23).

4. The on-line alloy baking equipment of the converter according to claim 3, characterized in that: the collecting box bottom plate (23) further comprises an opening, a movable plate which is hinged on the collecting box bottom plate (23) and matched with the opening, and a movable plate locking device.

5. The on-line alloy baking equipment of the converter according to claim 3, characterized in that: the aggregate box bottom plate (23) further comprises an opening, a horizontal sliding groove and a movable plate arranged in the horizontal sliding groove.

6. The on-line alloy baking equipment of the converter according to claim 1, characterized in that: the material distribution device also comprises a vertically arranged material guide baffle (20) which is fixedly connected to the lower surface of the material distribution plate (17) and arranged between the adjacent material distribution ports (18).

7. The on-line alloy baking equipment of the converter according to claim 1, characterized in that: 4-5 burners (3) are arranged.

8. The on-line alloy baking equipment of the converter according to claim 1, characterized in that: the upper surface of the material distributing plate (17) is provided with salient points for increasing friction force.