CN213650656U

CN213650656U - Pre-storage bin for improving material particle size distribution segregation

Info

Publication number: CN213650656U
Application number: CN202021502308.3U
Authority: CN
Inventors: 许相波; 李和平; 张正好; 毕传光; 王文
Original assignee: Shanghai Meishan Iron and Steel Co Ltd
Current assignee: Shanghai Meishan Iron and Steel Co Ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2021-07-09
Anticipated expiration: 2030-07-27

Abstract

The utility model relates to an improve storehouse of prestoring of material particle size distribution segregation, include: the bin body, be located connect material platform and baffle box in the feed bin. The utility model provides an improve material particle size distribution segregation's storehouse of prestoring, through the single-point material loading, the material flow is regular and the material segregation that the big impact of fixed point blanking process and the big range motion of windrow process lead to, realize the interior small burden of perpendicular cold furnace storehouse of prestoring and pile, the homogeneity of material distribution in the storehouse of prestoring is improved, thereby for the solid evenly distributed of perpendicular cold furnace intracavity, the abundant heat transfer of gas-solid creates the prerequisite, need not sieve income stove sintering deposit, realize that all hot materials are gone into stove cooling and heat recovery.

Description

Pre-storage bin for improving material particle size distribution segregation

Technical Field

The utility model relates to an improve storehouse of prestoring of material particle size distribution segregation belongs to steel smelting technical field.

Background

In the whole-flow steel production process, the energy consumption of the sintering process is high, the emission of waste gas and dust is large, and the traditional ring-type cooling process for sintered ores brings huge challenges to the development and upgrading of green manufacturing of the current steel industry. The vertical cooling of the sinter can remarkably reduce the emission of waste gas and raised dust in the sintering production process and improve the energy recycling effect, and is the development direction of the future sinter cooling technology.

Referring to a dry quenching system, a sinter vertical cooling furnace is provided with a pre-storage bin at the top, so that continuous production can be ensured, and meanwhile, furnace top dust can be avoided. The sintered ore is firstly loaded into a pre-storage bin through a skip car or a conveyor belt, then enters a vertical cooling furnace cavity, and the phenomena of separation of particles of the ore material and aggregation of the same particle size (segregation for short) can be naturally generated in the processes of turning, conveying and warehousing and stacking in a sintering trolley, so that the particle size distribution of the sintered ore in the bin is uneven, and generally, the larger the distance from a blanking point, the more the lump materials are. In the sliding, rolling and stacking process of the sinter entering the vertical cooling furnace cavity from the pre-storage bin, the segregation of materials in the pre-storage bin can be transmitted into the furnace cavity and further worsened, so that the airflow in the furnace cavity is unevenly distributed, airflow channels are locally formed, no airflow exists in other positions, the gas-solid heat exchange is influenced, the ore discharge temperature is high, the waste heat recovery effect is poor, and even the normal production of a sintering machine is influenced in severe cases.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: the defects of the technology are overcome, and the pre-storage bin capable of improving the material granularity distribution segregation is provided.

In order to solve the technical problem, the utility model provides a technical scheme is: a pre-storage bin for improving material particle size distribution segregation, comprising: the device comprises a bin body, a receiving platform and a guide chute; the top of the bin body is provided with a feeding hole, and the bottom of the bin body is provided with a plurality of discharging pipes; the bin body is arranged at the center of the top of the vertical cooling furnace and can feed materials into the vertical cooling furnace through the discharge pipe; the receiving platform is in a trapezoidal plate shape, the short edge of the receiving platform is connected with the feed inlet, and the long edge of the receiving platform is lower than the short edge; the included angle between the receiving platform and the horizontal plane is larger than the material repose angle; the material guide groove consists of two parallel funnels, and the horizontal sections of the funnels are rectangular; the guide chute is connected with the long edge of the receiving platform; the two funnels are arranged along the direction parallel to the long edge of the receiving platform; the center of the guide chute is aligned with the center of the bin body.

The scheme is further improved in that: the side of the receiving platform is provided with a baffle.

The scheme is further improved in that: the discharge pipes are symmetrically arranged.

The scheme is further improved in that: the included angle range of the material receiving platform and the horizontal plane is 50 degrees to 70 degrees.

The scheme is further improved in that: when the vertical cooling furnace is rectangular, the bin body is rectangular, and the ratio of the long edge to the short edge is less than or equal to 1.5.

The scheme is further improved in that: when the storehouse body is the rectangle, the feed inlet is located long limit one side of the storehouse body.

The utility model provides an improve material particle size distribution segregation's storehouse of prestoring, through the single-point material loading, the material flow is regular and the material segregation that the big impact of fixed point blanking process and the big range motion of windrow process lead to, realize the interior small burden of perpendicular cold furnace storehouse of prestoring and pile, the homogeneity of material distribution in the storehouse of prestoring is improved, thereby for the solid evenly distributed of perpendicular cold furnace intracavity, the abundant heat transfer of gas-solid creates the prerequisite, need not sieve income stove sintering deposit, realize that all hot materials are gone into stove cooling and heat recovery.

Drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention in a use state.

Fig. 2 is a schematic structural diagram of a preferred embodiment of the present invention.

Fig. 3 is a schematic top view of the structure of fig. 2.

Fig. 4 is a side view schematic of fig. 2.

Detailed Description

Examples

The pre-storage bin for improving material particle size distribution segregation in this embodiment, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, includes: the device comprises a bin body 1, a material receiving platform 2 and a material guide chute 3, wherein the material receiving platform and the material guide chute are positioned in the bin body 1; the top of the bin body 1 is provided with a feeding hole, and the bottom of the bin body is provided with a plurality of discharging pipes 5; the bin body 1 is arranged at the center of the top of the vertical cooling furnace 4 and can feed materials into the vertical cooling furnace 4 through a discharge pipe 5; the receiving platform 2 is in a trapezoidal plate shape, the short edge of the receiving platform is connected with the feed inlet, and the long edge of the receiving platform is lower than the short edge; the included angle between the receiving platform 2 and the horizontal plane is larger than the material repose angle; the material guide groove 3 consists of two parallel funnels, and the horizontal sections of the funnels are rectangular; the material guide groove 3 is connected with the long edge of the material receiving platform 2; the two funnels are arranged along the direction parallel to the long edge of the material receiving platform 2; the center of the material guide groove 3 is aligned with the center of the bin body 1.

Prestore the storehouse and set up in the center at vertical cooling furnace 5 top, adopt the skip material loading, and storehouse body 1 bottom sets up 6 and arranges material pipe 5, arranges material pipe 5 and stretches into the vertical cooling furnace 4 of lower part to rely on material self action of gravity to pay-off in the furnace chamber through arranging material pipe 5. And a material flow guiding device is arranged between the discharge opening of the skip car and the pre-storage bin to buffer the movement of the material and guide the material flow to reach the target position of the pre-storage bin.

The storehouse of prestoring in this embodiment is loaded and is adopted single mouthful of feeding, the mode of unloading of fixed point, prestores the storehouse and only establishes a feed inlet, adopts the skip to promote hot ore deposit to prestore the storehouse top from this feed inlet, and the skip is unloaded the material to the target location afterwards.

The sectional shape of the bin body 1 in the embodiment corresponds to the shape of the furnace chamber, the bin body is rectangular, the long side is 5m, the short side is 4m, and the ratio of the long side to the short side of the bin body 1 is 1.25, so that the material segregation in the long side direction is controlled; the height of the bin body is 1m, so that the segregation in the material stacking process is controlled.

The feed inlet of the bin body 1 in the embodiment is arranged on the long side of the bin body 1, the motion direction of the discharged materials is parallel to the short side, and segregation generated in the rolling process of the discharged materials is reduced. The discharging target position is positioned on a parallel line passing through the center of the bin body 1 and the short edge, and the horizontal distance from the discharging target position to the center of the bin body 1 is 1.5m, so that the segregation caused by the movement distance of the materials is reduced.

In order to control the segregation influence distribution generated in the motion process of the materials from the material unloading point to the bin body 1, the material receiving platform 2 and the guide chute 3 matched with the material receiving platform are arranged in the bin body 1 to guide the materials to flow to a target position and then vertically fall into the pre-storage bin, so that the fixed-point blanking of the pre-storage bin is realized, and the serious segregation caused by the direct throwing of the materials into the pre-storage bin is avoided. The receiving platform 2 and the material guide chute 3 are both fixed in the bin body 1.

The material receiving platform 2 of the embodiment adopts a trapezoidal plate-shaped structure, is parallel to the long edge of the bin body 1, has the length of the short edge of 1.2m and the length of the long edge of 3.5m, and is provided with a baffle plate on the side edge to prevent materials from scattering; the included angle alpha =50 degrees between the receiving platform 2 and the horizontal direction, and the distance between the blanking point on the receiving plate 2 and the discharge opening is 1.2m in the vertical direction, so that the impact crushing effect of mineral aggregate is reduced. The short edge of the receiving platform 2 is connected with the feed inlet, and the long edge is lower than the short edge.

The material guide groove 3 and the lower edge of the material receiving platform 2 are horizontally connected into an integral structure, the center of the material guide groove 3 is aligned with the bin body 1 and is two mineral material funnels which are arranged in parallel along the long edge direction of the bin body 1 and have square sections. The opening section at the bottom of the hopper trough is square, and the side length is 1 m; the side edges form an angle of 60 degrees with the horizontal. The material of the receiving platform 2 falls down along the channel after entering the funnel guide chute, two material piles are naturally formed in the bin body 1, the movement distance of the material in the stacking process is shortened, and the segregation problem caused by the material piles is reduced.

The number of the discharge pipes 6 in the bin body 1 is six, and the discharge pipes are symmetrically distributed on the bottom plate of the bin body 1 along the central lines of the long edge and the short edge of the bin body 1 respectively to ensure the uniformity of material distribution.

The material guide chute 3 guides the material flow to reach a target position in the bin body 1 and is positioned at the centers of the left and right discharge pipes 6, namely at the central positions of the four discharge pipes 6 on the left and right sides of the material movement direction. With the symmetry of the structure, the consistency of distribution of the pre-stored bin materials on the cross section of the furnace chamber after the materials are distributed into the furnace chamber is realized.

Through the storehouse setting of prestoring of this embodiment, avoided the material segregation that the big throw of the big impact of material pouring process and the big distance motion of windrow process brought, the material distribution in the vertical cooling furnace intracavity makes the gas-solid heat exchange condition show and improves, and the hot waste gas temperature of the vertical cooling furnace export of sinter has improved 20 ℃ than before implementing.

The present invention is not limited to the above embodiment. All technical solutions formed by equivalent substitutions fall within the protection scope of the present invention.

Claims

1. A pre-storage bin for improving material particle size distribution segregation is characterized by comprising the following components: the device comprises a bin body, a receiving platform and a guide chute, wherein the receiving platform and the guide chute are positioned in the bin body; the top of the bin body is provided with a feeding hole, and the bottom of the bin body is provided with a plurality of discharging pipes; the bin body is arranged at the center of the top of the vertical cooling furnace and can feed materials into the vertical cooling furnace through the discharge pipe; the receiving platform is in a trapezoidal plate shape, the short edge of the receiving platform is connected with the feed inlet, and the long edge of the receiving platform is lower than the short edge; the included angle between the receiving platform and the horizontal plane is larger than the material repose angle; the material guide groove consists of two parallel funnels, and the horizontal sections of the funnels are rectangular; the guide chute is connected with the long edge of the receiving platform; the two funnels are arranged along the direction parallel to the long edge of the receiving platform; the center of the guide chute is aligned with the center of the bin body.

2. The pre-storage bin for improving material grain size distribution segregation of claim 1, wherein: the side of the receiving platform is provided with a baffle.

3. The pre-storage bin for improving material grain size distribution segregation of claim 1, wherein: the discharge pipes are symmetrically arranged.

4. The pre-storage bin for improving material grain size distribution segregation of claim 1, wherein: the included angle range of the material receiving platform and the horizontal plane is 50 degrees to 70 degrees.

5. The pre-storage bin for improving material grain size distribution segregation of claim 1, wherein: when the vertical cooling furnace is rectangular, the bin body is rectangular, and the ratio of the long edge to the short edge is less than or equal to 1.5.

6. The pre-storage bin for improving material grain size distribution segregation of claim 1, wherein: when the storehouse body is the rectangle, the feed inlet is located long limit one side of the storehouse body.