Blending ore large material pile end material returning device

Abstract

The utility model discloses a blending device for materials at the end part of a blending ore large material pile, which is provided with a feeding belt conveyor in butt joint with the end part of a blending material yard large material pile, a middle conveying belt conveyor is arranged below the feeding belt conveyor, and the middle conveying belt conveyor is used for feeding materials to a sintering batching bin. An underpants-shaped material distributing hopper is arranged at an outlet of a discharging hopper of the feeding belt conveyor in a butt joint mode, one material distributing outlet of the underpants-shaped material distributing hopper corresponds to the middle conveying belt conveyor, and the other material distributing outlet of the underpants-shaped material distributing hopper is connected with an end material returning chute in a butt joint mode; a set of turning plate mechanism is further arranged in the middle of the two distributing outlets of the underpants-shaped distributing hopper; according to the application of the utility model, the original process that a head end material sintering batching bin is special for a bin and a tail end material is flatly paved with a material strip is canceled, an original material supply line and an original material receiving line of a material yard are transformed, the end material is recycled to the material strip and participates in ore blending again according to an ore blending scheme when a pile is opened next time, and the quality of blended ore is well stabilized.

Description

Technical Field

[0001] The utility model relates to the technical field of blending ore distribution equipment in the metallurgical iron-making industry, in particular to an end material re-distribution device for large blending ore piles. Background Art

[0002] In the ore distribution process of the iron and steel smelting industry, the blending of mixed ore is to accurately proportion a variety of bulk iron-containing raw materials, and then obtain the mixed ore with stable chemical composition and particle size composition through flat laying, cloth spreading and direct taking for sintering production.

[0003] According to the different intercepting parts of the reclaimer, the large blending ore pile is divided into end materials and barrel materials. The end materials refer to the irregular triangular materials at the head and tail of the large pile. When the blending ore reclaimer takes materials, it is the part of the materials that cannot intercept all the material layers at one time. The barrel materials refer to the regular triangular materials that the blending ore reclaimer can intercept all the material layers at one time.

[0004] During the stacking process of the blending ore pile, due to the self-weight of the raw materials and the natural segregation of the cloth, there will be particle segregation with more large-grained raw materials in the end materials and less small-grained raw materials in the barrel materials. The large proportion of large-grained materials causes large fluctuations in the chemical composition of the end materials, which has become a key factor affecting the quality of the blending ore. The end material treatment process flow adopted by the raw material yard of the iron and steel smelting plant is as follows: the head material of the large blending pile is transported by the reclaimer to the sintering batching bin, and is used specifically for the bin. When the barrel materials are supplied, they are gradually incorporated and used. The tail materials are spread flat on the material strip by a forklift and participate in the next ore distribution. This process can improve the quality and sintering performance of the blending ore to a certain extent, but the stability is not strong. With the change of the ore distribution plan, there are still large quality deviations, which is not conducive to the stability of the quality of the sintered ore. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an end material re-distribution device for large blending ore piles in view of the above situation. By using this device, the feeding line and the receiving line are transformed, and the end materials are recycled to the material strip and re-participate in the ore distribution according to the ore distribution plan when the next pile is opened, which can well stabilize the quality of the blending ore.

[0006] The specific scheme of the utility model is: a device for returning and distributing materials at the end of a large stockpile of mixed ore, comprising a feeding belt conveyor connected to the end of the large stockpile of the mixed material field, an intermediate conveying belt conveyor is arranged below the feeding belt conveyor, the intermediate conveying belt conveyor feeds materials to the sintering batching bin, and a trousers-shaped material distribution hopper is connected to the lower hopper outlet of the feeding belt conveyor, one of the distribution outlets of the trousers-shaped material distribution hopper corresponds to the intermediate conveying belt conveyor, and the other distribution outlet of the trousers-shaped material distribution hopper is connected to an end material return chute, and the end material return chute is pulled to a return distribution belt conveyor, and the return distribution belt conveyor sends the return material transported by the end material return chute back to the material field for re-distribution; a set of flap mechanism is also arranged in the middle of the two distribution outlets of the trousers-shaped material distribution hopper, and the flap mechanism is controlled by the electric control box to flip to both sides to realize material distribution from the two distribution outlets of the trousers-shaped material distribution hopper.

[0007] Furthermore, the flap mechanism described in the utility model includes a flip shaft, a flap and an electro-hydraulic push rod. The flip shaft is arranged at the inner middle position of the underpants-shaped distributing hopper, the flap is fixed to the flip shaft and rotates with the flip shaft, the electro-hydraulic push rod is hinged on the side wall of the underpants-shaped distributing hopper, and the front end of the electro-hydraulic push rod is hingedly connected to the side of the flap. Under the action of the electro-hydraulic push rod, the flap realizes the blocking switching of the two distributing outlets of the underpants-shaped distributing hopper.

[0008] Furthermore, the shape of the flap in the utility model matches the cross-sectional shape of the two material distribution outlets of the trousers-shaped material distribution hopper to achieve tight sealing after flipping and switching.

[0009] Furthermore, a dust removal pipeline is also provided on the end material return chute in the utility model, and the dust removal pipeline is externally connected to an external dust removal device.

[0010] Furthermore, a ceramic anti-sticking material lining plate is provided on the inner side wall of the trouser-shaped material distribution hopper and the inner side wall of the end material return chute in the utility model.

[0011] Furthermore, the belt slope of the intermediate conveyor belt conveyor described in the utility model is 12°.

[0012] Furthermore, the end material return chute described in the utility model is arranged obliquely from top to bottom.

[0013] The application of the utility model eliminates the original dedicated sintering batching bin for the head end materials, eliminates the process of flattening the material strips at the tail end materials, transforms the original material yard feeding line and material receiving line, recycles the end materials into material strips, and re-joins the ore batching according to the ore batching plan when the pile is opened next time, thus stabilizing the quality of the mixed ore. The utility model can be widely used in large-pile material yards. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the overall structural schematic diagram (including the installation structure) of the present utility model.

[0015] In the figure: 1 - feeding belt conveyor, 2 - electric control box, 3 - electro-hydraulic push rod, 4 - flap, 5 - flap rotating shaft, 6 - intermediate conveying belt conveyor, 7 - cement floor, 8 - support and hopper cleaning platform, 9 - return belt conveyor, 10 - bifurcated distributor hopper, 11 - dust removal pipeline, 12 - end material return chute. Specific embodiments

[0016] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection scope of the present utility model. In the description of the present utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model or simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0017] In the description of the present utility model, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0018] See Figure 1The utility model is a device for returning materials at the end of a large stockpile of mixed ore, which comprises a feeding belt conveyor 1 connected to the end of the large stockpile of the mixed material field, an intermediate conveying belt conveyor 6 is arranged below the feeding belt conveyor, and the intermediate conveying belt conveyor feeds materials to the sintering batching bin, and a trousers-shaped material distribution hopper 10 is connected to the outlet of the lower hopper of the feeding belt conveyor, one of the material distribution outlets of the trousers-shaped material distribution hopper corresponds to the intermediate conveying belt conveyor, and the other material distribution outlet of the trousers-shaped material distribution hopper is connected to an end material return chute 12. The end material return chute is pulled to a return distribution belt conveyor 9, and the return distribution belt conveyor sends the return material transported by the end material return chute back to the material yard for re-distribution; further, the end material return chute described in the utility model is also provided with a dust removal pipe 11, and the dust removal pipe is externally connected to the external dust removal equipment; a set of flap mechanism is also provided in the middle of the two distribution outlets of the underpants-type distribution hopper, and the flap mechanism is controlled by the electric control box 2 to flip to both sides to realize distribution from the two distribution outlets of the underpants-type distribution hopper. Furthermore, the flap mechanism in the utility model includes a flip shaft 5, a flap 4 and an electro-hydraulic push rod 3, the flip shaft is arranged at the inner middle position of the trousers-type material distribution hopper, the flap is fixed on the flip shaft and rotates with the flip shaft, the electro-hydraulic push rod is hinged on the side wall of the trousers-type material distribution hopper, the front end of the electro-hydraulic push rod is hingedly connected to the side of the flap, and the flap realizes the blocking switching of the two material distribution outlets of the trousers-type material distribution hopper under the action of the electro-hydraulic push rod. Furthermore, the shape of the flap in the utility model matches the cross-sectional shape of the two material distribution outlets of the trousers-type material distribution hopper to realize the tight blocking of the flip switching.

[0019] Furthermore, the inner wall of the trouser-shaped material distribution hopper and the inner wall of the end material return chute in this embodiment are both provided with ceramic anti-sticking material lining plates. Furthermore, the belt slope of the intermediate conveyor belt conveyor in the utility model is 12°. Furthermore, the end material return chute in the utility model is arranged obliquely from top to bottom.

[0020] The calculation method of the mixed ore end material can be divided into the following steps:

[0021] Determine the composition of the mixed ore: First, you need to know what raw materials the mixed ore is composed of, the content of each raw material, and the mass of each raw material. Assume that the mixed ore is composed of raw materials A, B, and C, and their masses are mA, mB, and mC respectively.

[0022] Calculate the mass ratio of each raw material: Calculate the mass ratio of each raw material according to the composition of the mixed ore. The mass ratio can be obtained by calculating the ratio of the mass of each raw material to the total mass. Assuming that the total mass of the mixed ore is M, the mass ratios are fA, fB, and fC respectively, and it can be calculated that: fA = mA / M, fB = mB / M, fC = mC / M.

[0023] Calculate the content of end-face material in the blended ore: The content of end-face material in the blended ore refers to the product of the mass ratios of each raw material in the blended ore relative to the total mass. The content of end-face material for each raw material can be calculated based on the mass ratio, and then added together to obtain the content of end-face material in the blended ore. Assuming the content of end-face material for each raw material is PA, PB, and PC respectively, it can be calculated as follows: PA = mA / M * fA, PB = mB / M * fB, PC = mC / M * fC.

[0024] Content of end-face material = PA + PB + PC

[0025] Through the above calculation steps, the content of end-face material in the blended ore can be obtained. Note that the above method is applicable to the case of only three raw materials. If there are more raw materials, similar steps need to be followed for calculation.

[0026] According to the distribution of the belt process flow in the raw material yard (taking the Egang site as an example), cancel the special sintering batching bins for the head and end-face materials, cancel the process of laying the end-face material flat at the tail, and take measures to transform the feeding line and the receiving line. Recover the end-face material to the material strip and re-participate in ore blending according to the ore blending plan during the next pile opening to stabilize the quality of the blended ore.

[0027] When this utility model is used in a specific site, the specific implementation method is as follows:

[0028] ① Equipment transformation

[0029] After the entire receiving hopper at the head of the feeding belt conveyor is removed, reinstall a bifurcated batching hopper. Through the flap - bifurcated batching hopper, unload the end-face material onto the return belt conveyor of the receiving line, and stack it onto the material strip through the stacker-reclaimer to re-participate in ore blending.

[0030] Add a bifurcated batching hopper: According to the process flow, transform the feeding hopper at the head of the feeding belt conveyor. After the feeding hopper is removed, reinstall a bifurcated batching hopper. The bifurcated batching hopper includes a turning shaft, a flap, and an electro-hydraulic push rod.

[0031] Add a return chute for the end-face material of the blended ore; the horizontal height of the feeding hopper at the head of the feeding belt conveyor is 4.8 m, and the horizontal height at the belt receiving point of the return belt conveyor is -6.5 m, with a vertical angle of about 36°. The return chute for the end-face material needs to extend to the belt of the return belt conveyor. Therefore, the cement floor needs to be drilled for construction.

[0032] Install ceramic anti-sticking lining plates on both the internal material scouring and the contact surface of the bifurcated batching hopper and the return chute for the end-face material.

[0033] Install a dust removal pipeline above the return chute for the end-face material.

[0034] New electric control box: Controls the electro-hydraulic push rod on the side of the underwear-shaped distributor hopper.

[0035] After the equipment transformation is completed, the process flow changes. The specific implementation method is as follows:

[0036] When it is necessary to take the end material, start the return belt of the return belt conveyor, operate the electric control box, and adjust the flap in the underwear-shaped distributor hopper to keep the passage for the end material to return to the chute. The reclaimer starts to take the material; the end material of the homogenized ore passes through the feeding belt conveyor - underwear-shaped distributor hopper - end material return chute - return belt conveyor - receiving line - primary stockyard, and then participates in ore blending again.

[0037] When taking the body material, take the material according to the normal process flow.

[0038] Before the transformation: From the results of these three piles of homogenized ore, it can be found that when there are large fluctuations, they are all at the head and tail of the pile. The qualified rate is only 84.6%, and the standard deviation exceeds 0.1%, which has a greater impact on the control of the R degree of sintering production.

[0039] After the transformation, the qualified rate of SiO 2 (silicon dioxide) increases from 84.6% with a standard deviation exceeding 0.1% to SiO 2 The qualified rate is increased to 96.2%, the standard deviation is decreased to 0.08%, and the qualified rate at the head and tail of the pile basically reaches 100%; the fluctuation of the R (alkalinity) of the sintered ore is reduced.

[0040] The application of the present utility model cancels the special sintering batching bin for the head end material, cancels the process of laying the end surface material into strips at the tail, transforms the original stockyard feeding line and receiving line, recovers the end material to the strip, and participates in ore blending again according to the ore blending plan when the next pile is opened, which stabilizes the quality of the homogenized ore very well; the present utility model can be widely applied in the large pile stockyard.

Claims

1. A material return device at the end of a large stockpile of mixed ore, having a feeding belt conveyor connected to the end of the large stockpile of the mixed material field, and an intermediate conveying belt conveyor is arranged below the feeding belt conveyor, and the intermediate conveying belt conveyor feeds materials to the sintering batching bin, characterized in that: A trousers-shaped distributing hopper is connected to the lower hopper outlet of the feeding belt conveyor, one of the distributing outlets of the trousers-shaped distributing hopper corresponds to the middle conveying belt conveyor, and the other distributing outlet of the trousers-shaped distributing hopper is connected to an end material return chute, and the end material return chute is pulled to a return distribution belt conveyor, and the return distribution belt conveyor sends the return material conveyed by the end material return chute back to the material yard for re-distribution; a set of flap mechanism is also provided in the middle of the two distributing outlets of the trousers-shaped distributing hopper, and the flap mechanism is controlled by the electric control box to flip to both sides to realize material distribution from the two distributing outlets of the trousers-shaped distributing hopper.

2. The device for returning materials at the end of a large mixed ore pile according to claim 1 is characterized in that: The flap mechanism includes a flip shaft, a flap and an electro-hydraulic push rod. The flip shaft is arranged at the inner middle position of the underpants-shaped distributing hopper. The flap is fixed on the flip shaft and rotates with the flip shaft. The electro-hydraulic push rod is hinged on the side wall of the underpants-shaped distributing hopper. The front end of the electro-hydraulic push rod is hingedly connected to the side of the flap. Under the action of the electro-hydraulic push rod, the flap realizes the blocking switching of the two distributing outlets of the underpants-shaped distributing hopper.

3. The device for returning the end material of a large mixed ore pile according to claim 2 is characterized in that: The shape of the flap matches the cross-sectional shape of the two distributing outlets of the trouser-shaped distributing hopper to achieve tight sealing after flipping and switching.

4. The device for returning materials at the end of a large mixed ore pile according to claim 1 is characterized in that: The end material return chute is also provided with a dust removal pipeline, which is connected to an external dust removal device.

5. The device for returning materials at the end of a large mixed ore pile according to claim 1 is characterized in that: Ceramic anti-sticking material lining plates are arranged on the inner side wall of the trouser-shaped material distribution hopper and the inner side wall of the end material return chute.

6. The device for returning materials at the end of a large mixed ore stockpile according to claim 1, characterized in that: The belt slope of the intermediate conveyor belt is 12°.

7. The device for returning materials at the end of a large mixed ore pile according to claim 1 is characterized in that: The end material return chute is arranged obliquely from top to bottom.

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