CN218270246U - Auxiliary material preheating device for steelmaking - Google Patents

Abstract

The utility model discloses an auxiliary material preheating device for steelmaking, including reinforced main part and intensification mechanism, intensification mechanism includes gas piping, air duct, hot-blast furnace and supply-air duct, gas piping and air duct all are connected with the hot-blast furnace, supply-air duct's one end is connected with the hot-blast furnace, and the other end is connected with reinforced main part. The utility model discloses in can preheat the stoving to the auxiliary material in the steelmaking, get rid of the mechanical water and the crystal water in the auxiliary material, reduce and smelt the energy consumption, energy saving consumes.

Description

Auxiliary material preheating device for steelmaking

Technical Field

The utility model relates to an auxiliary material preheats technical field, especially relates to an auxiliary material preheating device for steelmaking.

Background

In converter steelmaking or electric furnace steelmaking, the main raw materials in steelmaking are molten iron, iron blocks and scrap steel, and the auxiliary materials are generally quicklime, light burned dolomite, limestone, dolomite, magnesium balls, iron ore, various alloys, carburant and the like. However, at normal temperature, the auxiliary materials contain more mechanical water and crystal water, and the auxiliary materials with water are added into the steel-making furnace at the normal temperature to perform a hot water absorption carbon reaction at high temperature to generate carbon monoxide and hydrogen; this results in the generation of bubbles under the slab, and the quality defects such as excessive hydrogen content in the steel, which leads to the reduction of product quality.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a steelmaking is with auxiliary material preheating device to the not enough of above-mentioned prior art.

In order to solve the above problems, the utility model adopts the following technical proposal:

the utility model provides a steelmaking is with auxiliary material preheating device, includes reinforced main part and intensification mechanism, intensification mechanism includes gas piping, air conduit, hot-blast furnace and supply-air duct, gas piping and air conduit all are connected with the hot-blast furnace, the one end of supply-air duct is connected with the hot-blast furnace, and the other end is connected with reinforced main part.

Preferably, the feeding main body comprises a heating bin and a collecting bin communicated with the heating bin, and the air supply pipeline is connected with the lower part of the heating bin.

Preferably, the heating chamber is provided with a plurality of heating chambers, and the plurality of heating chambers are communicated with the air supply pipeline.

Preferably, an air distributing valve is arranged between the air supply pipeline and the heating bin.

Preferably, a weighing bin is arranged between the heating bin and the collecting bin, and the weighing bin is respectively communicated with the heating bin and the collecting bin.

Preferably, a first vibrating feeder is arranged between the heating bin and the weighing bin.

Preferably, a second vibrating feeder is arranged between the weighing bin and the gathering bin.

Preferably, the top of the heating bin is connected with a dust removal pipeline.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

1. the utility model discloses the gas pipeline is to carrying coal gas and ignition heating air in the hot-blast furnace in to the hot-blast furnace, and hot-air carries to the heated warehouses in through the supply air pipeline, and hot-air carries out preheating to the auxiliary material in the heated warehouses, makes the mechanical water and the crystal water evaporation in the auxiliary material, avoids moisture to get into in the steel, improves product quality;

2. the utility model provides an auxiliary material is through preheating the back, and the auxiliary material that contains water in the normal atmospheric temperature relatively makes the sediment fast, and the smelting cycle is short, can improve the production efficiency of steel.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is another angle structure schematic of the present invention.

In the figure: the device comprises a gas pipeline 1, an air pipeline 2, a hot blast stove 3, an air supply pipeline 4, a heating bin 5, a collecting bin 6, an air dividing valve 7, a weighing bin 8, a first vibrating feeder 9, a second vibrating feeder 10 and a dust removal pipeline 11.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the drawings and examples. The following examples are provided to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and 2, an auxiliary material preheating device for steelmaking comprises a feeding main body and a heating mechanism, wherein the heating mechanism comprises a gas pipeline 1, an air pipeline 2, a hot blast stove 3 and an air supply pipeline 4, the gas pipeline 1 and the air pipeline 2 are both connected with the hot blast stove 3, the gas pipeline 1 and the air pipeline 2 are two pipelines which are not communicated with each other, gas is introduced into the gas pipeline 1 and enters the hot blast stove 3 through the gas pipeline 1, one end of the air pipeline 2 is communicated with the hot blast stove 3, the other end of the air pipeline 2 is connected with a fan, the fan sends outside air into the hot blast stove 3 through the air pipeline 2, a nozzle is arranged at one end of the gas pipeline 1 in the hot blast stove 3 and can ignite, the gas is used as a combustible material for combustion, the air sent by the air pipeline 2 is used as combustion-supporting gas for combustion, so that flame can be combusted in the hot blast stove 3, one end of the air pipeline 4 is connected with the hot blast stove 3, the other end of the fan is connected with the feeding main body, the flame heats the air in the hot blast stove 3, the heated air can heat the auxiliary material along the feeding pipeline 4, and the fan can smoothly provide power for air to circulate, so that the air.

It should be noted that an air distribution device is further arranged between the air supply pipeline 4 and the heating bin 5, and the air distribution device can solve the problem that the auxiliary materials are heated unevenly in the heating bin 5, so that the auxiliary materials are heated evenly in the heating bin 5, and the preheating effect is improved; divide the tuber pipe for the annular branch tuber pipe of circle, divide the tuber pipe to be linked together with supply-air duct, divide the tuber pipe to be located the lower part of heated warehouses 5, divide on the tuber pipe evenly to have seted up a plurality of ventilation holes along the circumferencial direction, the hot-air entering in the supply-air duct 4 is divided the intraductal back of tuber pipe and is spout in the ventilation hole, heats the auxiliary material in the heated warehouses 5, can make the auxiliary material be heated evenly, improves and preheats the stoving effect.

In another embodiment, the charging body comprises a heating chamber 5 and a collecting chamber 6 communicated with the heating chamber 5, and the air supply duct 4 is connected with the lower part of the heating chamber 5. In this embodiment, supply air duct 4 is connected with heated warehouses 5's lower part, and the hot-air among the supply air duct 4 gets into heated warehouses 5's bottom, because hot-air density is little, can rise to heated warehouses 5's top from heated warehouses 5's bottom, and the auxiliary material in heated warehouses 5 is preheated to hot-air in the rising in-process, and mechanical water and crystal water in the stoving auxiliary material guarantee the drying of auxiliary material, and the auxiliary material after preheating drops to gathering in storehouse 6 in by heated warehouses 5, heated warehouses 5 and gather and be equipped with the valve between the storehouse 6, the valve is the bar valve for the speed of dropping of auxiliary material in the controlled heated warehouses 5, avoids the auxiliary material to drop too fast and leads to preheating temperature not enough, or the auxiliary material drops to lead to the high temperature too slowly.

In another embodiment, the heating chamber 5 is provided in plurality, and the plurality of heating chambers 5 are all communicated with the air supply pipeline 4. In this embodiment, because the auxiliary materials have a plurality of types, a plurality of heating bins 5 are provided, each heating bin 5 contains one type of auxiliary material, and the weight and the volume of each type of auxiliary material are different, so the size of each heating bin 5 is the same, and each heating bin 5 can be connected with the air supply pipeline 4 according to the weight and the volume of the auxiliary material, so that the hot air in the air supply pipeline 4 can fully enter each heating bin 5.

In another embodiment, an air distributing valve 7 is arranged between the air supply pipeline 4 and the heating bin 5. In this embodiment, be equipped with high temperature between supply air duct 4 and heated warehouses 5 and divide blast gate 7, can be high temperature resistant, can also adjust the flow that gets into the high temperature flue gas in heated warehouses 5 simultaneously to this auxiliary material preheating temperature in heated warehouses 5 controls.

In another embodiment, a weighing bin 8 is arranged between the heating bin 5 and the collecting bin 6, and the weighing bin 8 is respectively communicated with the heating bin 5 and the collecting bin 6. In this embodiment, the auxiliary material in the heated warehouses 5 drops to weighing compartment 8 in, weighing compartment 8 weighs the auxiliary material that drops, confirms the weight of auxiliary material, and after the auxiliary material weighed finishes, the stick valve is closed, makes the auxiliary material can't continue to drop, weighing compartment 8 and gathering and being equipped with pneumatic gate valve between the storehouse 6, weigh the back gate valve that finishes and open, and various auxiliary materials drop to gathering in the storehouse 6, accomplish the mixture of auxiliary material, pneumatic gate valve only need control the break-make, need not control the speed that drops, therefore gate valve alright completion work demand.

In another embodiment, a first vibrating feeder 9 is arranged between the heating bin 5 and the weighing bin 8. In this embodiment, first vibrating feeder 9 can prevent that the auxiliary material from piling up between heated warehouses 5 and weigh bin 8, because heated warehouses 5 and the bottom be equipped with the bar valve, consequently through high temperature resistant hose connection between bar valve and the first vibrating feeder 9, can high temperature resistant while can also avoid leading to the fracture because of first vibrating feeder 9's vibrations, make the auxiliary material can fall into weigh bin 8 smoothly.

In another embodiment, a second vibratory feeder 10 is provided between the weigh bin 8 and the summary bin 6. In this embodiment, second vibrating feeder 10 can prevent equally that the auxiliary material from piling up, pneumatic slide valve is located between weigh bin 8 and the second vibrating feeder 10, because vibrations can appear in second vibrating feeder 10 at the course of the work, consequently second vibrating feeder 10 with gather and be connected through high temperature resistant hose between the storehouse 6, avoid the pipeline fracture.

In another embodiment, the top of the heating chamber 5 is connected with a dust removal pipeline 11, and the dust removal pipeline 11 is connected with an external secondary dust removal system or other dust removal systems to play a role in removing dust. In this embodiment, the hot air dries the auxiliary material in the rising process, and will blow up some powder in the rising process of hot air, in order to prevent contaminated air, seals the top of hot air warehouse 5 and connects dust removal pipeline 11, and the air that has the dust gets into in the dust removal pipeline 11, carries out the dust removal processing.

It should be noted that a converter/electric furnace for iron and steel smelting is arranged below the collecting bin 10, and a chute is arranged between the converter/electric furnace and the collecting bin 10 and used for conveying the raw materials in the collecting bin 10 into the converter/electric furnace.

In the utility model, coal gas and air are mixed and combusted in the burner, high-temperature flue gas at 900-1100 ℃ can be generated in the hot blast stove, the high-temperature flue gas enters the heating bin 5 to preheat and dry auxiliary materials, the flue gas can be reduced to 100 ℃ after drying is finished and enters the dust removal pipeline 11, and the flue gas after dust removal can also be subjected to waste heat recovery, thereby saving energy; the preheated auxiliary materials have high temperature and less moisture, so that the energy consumption can be reduced during electric furnace steelmaking; and the converter steelmaking can improve the scrap steel proportion and reduce the molten iron consumption, and the energy consumption of the iron making process is about 350kgce/t when the scrap steel replaces 1t of molten iron.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims (8)

1. The auxiliary material preheating device for steelmaking is characterized by comprising a feeding main body and a heating mechanism, wherein the heating mechanism comprises a gas pipeline (1), an air pipeline (2), a hot blast stove (3) and an air supply pipeline (4), the gas pipeline (1) and the air pipeline (2) are both connected with the hot blast stove (3), one end of the air supply pipeline (4) is connected with the hot blast stove (3), and the other end of the air supply pipeline is connected with the feeding main body.

2. The auxiliary material preheating device for steelmaking as claimed in claim 1, wherein the charging body comprises a heating chamber (5) and a collecting chamber (6) communicated with the heating chamber (5), and the air supply duct (4) is connected with the lower part of the heating chamber (5).

3. The auxiliary material preheating device for steelmaking as claimed in claim 2, wherein a plurality of the heating chambers (5) are provided, and the plurality of the heating chambers (5) are communicated with the air supply duct (4).

4. A steelmaking auxiliary material preheating device as claimed in claim 3, characterized in that a wind distribution valve (7) is arranged between the air supply duct (4) and the heating chamber (5).

5. The auxiliary material preheating device for steelmaking as claimed in claim 2, wherein a weighing bin (8) is arranged between the heating bin (5) and the collecting bin (6), and the weighing bin (8) is respectively communicated with the heating bin (5) and the collecting bin (6).

6. An auxiliary material preheating device for steelmaking as claimed in claim 5, characterized in that a first vibrating feeder (9) is provided between the heating bin (5) and the weighing bin (8).

7. Auxiliary material preheating device for steelmaking according to claim 5, characterized in that a second vibrating feeder (10) is arranged between the weighing bin (8) and the collecting bin (6).

8. An auxiliary material preheating device for steelmaking as claimed in claim 2, characterized in that the top of the heating chamber (5) is connected with a dust removal pipe (11).

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