Stockpiling method of finely mixed material stack
Through the method of fine mixing and stacking, the multi-stage flat stacking method of mixing and stacking machine is used to solve the problems of unstable components and excessive volume in the traditional stacking method, and the end of the stack is realized stability and cost savings in the department.
Patent Information
- Application Number
- CN202411612604.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-01-07
AI Technical Summary
The traditional stacking method cannot achieve full-section mixing of materials on all layers of materials, resulting in rapid changes in the ends of the finished stack, and the volume of the end materials that need to be processed is large, increasing production costs.
The method of fine mixing pile pile is adopted. The pile is divided into n sections according to its height by mixing and stacking machine. When each section of piled, the lifting height and indentation distance of the main arm are adjusted to realize the multi-stage type of changing the starting point and fixed end point. The method of laying materials to ensure that the end point of each layer of materials is the same and the end of the materials stack is horizontally layered.
Reduces fluctuations in the end components of the material stack, reduces the volume of end materials that need to be processed, and significantly reduces production costs.
Smart Images
Figure CN119262874A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of mineral material stacking, and in particular to a method for stacking fine mixed materials. Background Art
[0002] The raw material yard is a place for receiving, storing, processing and mixing raw materials, fuel and other materials for iron and steel metallurgy. Ore raw materials are often mixed in type, with large fluctuations in composition and particle size due to different sources and varieties, as well as unstable mine composition. Mixing ore raw materials can provide ore raw materials with stable quality for sintering and ironmaking production, thereby improving the quality of sintered ore and improving the technical and economic indicators of blast furnace production.
[0003] The traditional stacking method adopts a fixed starting point for laying materials, with the same laying interval. The ore laid later covers the ore laid earlier, until the last ore is laid, forming the final stacking, and the top of the final stacking material is pointed. The drum reclaimer takes materials from the end of the fine mixing pile. The drum material rake angle is basically the same as the repose angle of the cone surface of the material pile. Before the material rake position completely exceeds the stacking starting point, the material rake can only take materials from the outer layer of the cone at the end of the pile, that is, only the outer layer of materials is raked, and the purpose of raking and mixing the entire cross-section of each layer of the material in the pile cannot be achieved. The mixing quality of the material at the end of the finished pile cannot be guaranteed, resulting in a rapid change in the composition in the head area and a large deviation from the main part; due to the quality fluctuation of the material at the end of the pile, the material at the end of the pile needs to be processed. The volume of the end material that needs to be processed after the traditional stacking is completed is large, which increases the production cost. Summary of the invention
[0004] In order to solve the above technical problems, the present invention provides a method for stacking fine mixed materials to achieve the technical effect of improving the mixing quality of materials at the end of a large finished product pile.
[0005] To achieve this technical purpose, the present invention adopts the following scheme:
[0006] A method for stacking fine mixed materials is carried out according to the following steps:
[0007] S1. Select the stockpiling operation surface in the material yard;
[0008] S2. Determine the end and tail of the pile according to the size of the pile area, and determine the endpoint and end point of the first layer of pile;
[0009] S3, according to the operating parameters of the mixer and the height of the pile, the pile stacking process is divided into n sections according to the height, and the pile lifting height of each mixer is h=H / n, where H is the planned pile height of the large pile;
[0010] S4. Calculate the minimum distance that the mixing pile stacker should retract when the material does not slide down in a cone after each section of the big arm of the mixing pile stacker is lifted through the range of the big pile repose angle. L = h / tanα, where L is the retracted distance of the mixing pile each time, and α is the big pile repose angle;
[0011] S5, start the mixing and stacking machine, the arm of the mixing and stacking machine starts to stack materials from the end of the first layer of materials to the tail. When stacking materials, first move the materials horizontally from the end point of the first layer of materials to the end point. After the mixing and stacking machine arm completes the first layer of materials stacking, the arm of the mixing and stacking machine retreats to the end of the materials stacking and shrinks inwards by a distance L from the starting point of the first layer to stack the second layer; after the second layer of materials stacking is completed, the arm of the mixing and stacking machine retreats to the end of the materials stacking and shrinks inwards by a distance L from the starting point of the second layer to stack the third layer, and so on. During the stacking process, ensure that the end position of each layer of materials stacking is the same, and the length of the previous layer of materials stacking is longer than the length of the next layer of materials stacking by a distance L from the starting point position, until n layers of materials stacking are completed.
[0012] Compared with the prior art, the present invention has the following beneficial effects:
[0013] The present invention realizes a multi-stage flat stacking method with a variable starting point and a fixed end point by controlling the differential lifting of the large arm of the mixing and stacking machine, so that when the materials are stacked in the current stage, the end materials are stacked on the basis of the upper materials, rather than sliding down in a cone shape to cover the upper materials, thereby ensuring that the end of the material pile is horizontally layered like the whole material pile, rather than conically layered. The change of the distribution point makes the lower ore pile not covered by the upper ore pile, reducing the fluctuation of the composition of the end fine mixing product and ensuring the stability of the product.
[0014] Further, the preferred embodiment adopted by the present invention is:
[0015] The lifting height h of each section of the mixing and stacking machine ranges from 1m to 1.5m.
[0016] Due to the quality fluctuation of the end material, the total volume of the pile that needs to be processed at the end of the pile is V, and the volume of the end of each section of the pile is V1, V = nV1; V1 = 1 / 2[ 1 / 3*h*π(h / tanα) 2 ]. Compared with the traditional end-handled pile, the volume is reduced by more than 80%, reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of material layering at the end of the traditional stacking method;
[0018] Figure 2 It is a schematic diagram of the end material layering of the present invention. DETAILED DESCRIPTION
[0019] In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail through the following specific implementation methods, but the present invention is not limited thereto.
[0020] A method for stacking fine mixed materials is carried out according to the following steps:
[0021] S1. Select a stacking operation surface in the material yard according to the volume of the material to be stacked. The area of the stacking operation surface is large enough to ensure that the mixing and stacking machine can move back and forth.
[0022] S2. According to the ends and tails of the large and small stockpiles in the stockpiling area, the end points and terminal points of the first layer of stockpiles are determined, and the arm of the mixing stockpiler reciprocates between the ends and tails of the stockpiles to stack the materials.
[0023] S3. According to the operating parameters of the mixing stocker and the height of the stockpile, the stockpile stacking process is evenly divided into n sections according to the height. The lifting height of the mixing stocker in each section is h=H / n, where H is the planned stacking height of the large pile.
[0024] S4. Calculate the minimum distance L = h / tanα that the mixing pile should retract when the material does not slide down in a cone after each section of the mixing pile arm is lifted through the range of the large pile repose angle. Among them, L is the retraction distance of the mixing pile each time, and α is the large pile repose angle.
[0025] S5, start the mixing and stacking machine, the arm of the mixing and stacking machine starts to stack materials from the end of the first layer of materials to the tail. When stacking materials, first move the materials horizontally from the end point of the first layer of materials to the end point. After the mixing and stacking machine arm completes the first layer of materials stacking, the arm of the mixing and stacking machine retreats to the end of the materials stacking and shrinks inwards by a distance L from the starting point of the first layer to stack the second layer; after the second layer of materials stacking is completed, the arm of the mixing and stacking machine retreats to the end of the materials stacking and shrinks inwards by a distance L from the starting point of the second layer to stack the third layer, and so on. During the stacking process, ensure that the end position of each layer of materials stacking is the same, and the length of the previous layer of materials stacking is longer than the length of the next layer of materials stacking by a distance L from the starting point position, until n layers of materials stacking are completed.
[0026] In this embodiment, the lifting height h of each section of the mixing and stacking machine ranges from 1m to 1.5m. If the h value is too large, the lifting height of each section of the mixing and stacking machine is too high, resulting in too large a volume of material at the end of each section of the material pile. If the h value is too small, the performance is not very good due to the fluidity of the material, resulting in unclear separation of the material at the end of each section of the material pile.
[0027] Due to the quality fluctuation of the end material (end material segregation), the total volume of the pile that needs to be processed at the end of the pile is V, and the volume of the end of each section of the pile is V1, V = nV1; V1 = 1 / 2[ 1 / 3*h*π(h / tanα) 2 ].
[0028] The volume of the pile at the end of the traditional stacking method is V2, V2 = 1 / 2[ 1 / 3*H*π(H / tanα) 2 ],
[0029] The comparison between the conventional stacking method and the stacking method of the present invention is as follows:
[0030] Based on a series of indicators such as the repose angle of the mixed ore, material properties (fluidity), planned number of stacking layers, and pile height, the optimal value of n is calculated, and the volumes of V and V2 are obtained using the cone calculation formula.
[0031] Example 1: The planned height of the large pile is H = 15m, the angle of repose α = 37.1°, n = 10, and the calculation
[0032] h=H / n=1.5m,
[0033] L = h / tan37.1° = 1.98m,
[0034] V1= 1 / 2[ 1 / 3h*π(h / tan37.1°) 2 ]=3.078m 3 ,
[0035] V=n*V1=30.78m 3 ,
[0036] V2= 1 / 2[ 1 / 2H*π(H / tan37.1°) 2 ]=3077.51m 3 .
[0037] Example 2: Large pile planned height H = 12m, repose angle β = 38.5°, n = 9, calculation
[0038] h=H / n=1.33m,
[0039] L = h / tan38.5° = 1.68m,
[0040] V1= 1 / 2[ 1 / 3h*π(h / tan38.5°) 2 ]=1.96m 3 ,
[0041] V=n*V1=17.64m 3 ,
[0042] V2= 1 / 2[1 / 2H*π(H / tan38.5°) 2 ]=1430m 3
[0043] It can be seen from this that the volume of the end material that needs to be processed is significantly reduced, which saves mixing and reduces production costs.
[0044] The present invention realizes a multi-stage flat stacking method with a variable starting point and a fixed end point by controlling the differential lifting of the large arm of the mixing and stacking machine, so that when the materials are stacked in the current stage, the end materials are stacked on the basis of the upper materials, rather than sliding down in a cone shape to cover the upper materials, thereby ensuring that the end of the material pile is horizontally layered like the whole material pile, rather than conically layered. The change of the distribution point makes the lower ore pile not covered by the upper ore pile, reducing the fluctuation of the composition of the end fine mixing product, ensuring the stability of the product, and the volume of the end material to be processed by the present invention is significantly reduced, thereby reducing the production cost.
[0045] Finally, it should be noted that the above are only preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and variations fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.
Claims
1. A method for stacking fine mixed materials, comprising the following steps: S1. Select the stockpiling operation surface in the material yard; S2. Determine the end and tail of the pile according to the size of the pile area, and determine the endpoint and end point of the first layer of pile; Features: S3, according to the operating parameters of the mixer and the height of the pile, the pile stacking process is divided into n sections according to the height, and the pile lifting height of each mixer is h=H / n, where H is the planned pile height of the large pile; S4. Calculate the minimum distance that the mixing pile stacker should retract when the material does not slide down in a cone after each section of the big arm of the mixing pile stacker is lifted through the range of the big pile repose angle. L = h / tanα, where L is the retracted distance of the mixing pile each time, and α is the big pile repose angle; S5, start the mixing and stacking machine, the mixing and stacking machine arm starts to stack materials from the end of the first layer of materials to the tail, when stacking materials, first move the materials horizontally from the end point of the first layer of materials to the end point, after the mixing and stacking machine arm completes the first layer of materials, the mixing and stacking machine arm retreats to the end of the materials and retracts a distance L inward from the starting point of the first layer, and stacks the materials for the second layer; After the second layer of stacking is completed, it returns to the end of the stacking and retracts a distance L inward from the starting point of the second layer to carry out the third layer of stacking, and so on. During the stacking process, ensure that the end position of each layer of stacking is the same, and the length of the previous layer of stacking is longer than the length of the next layer of stacking by a distance L inward from the starting position until n layers of stacking are completed.
2. The method for stacking fine mixed materials according to claim 1, characterized in that: The lifting height h of each section of the mixing and stacking machine ranges from 1m to 1.5m.
3. The method for stacking fine mixed materials according to claim 1, characterized in that: Due to the quality fluctuation of the end material, the total volume of the pile that needs to be processed at the end of the pile is V, and the volume of the end of each section of the pile is V1, V = nV1; V1 = 1 / 2[1 / 3*h*π(h / tanα) 2 ].