CN113581871A - Gradual change type blending ore stacking method - Google Patents
Gradual change type blending ore stacking method Download PDFInfo
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- CN113581871A CN113581871A CN202110974311.8A CN202110974311A CN113581871A CN 113581871 A CN113581871 A CN 113581871A CN 202110974311 A CN202110974311 A CN 202110974311A CN 113581871 A CN113581871 A CN 113581871A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/28—Piling or unpiling loose materials in bulk, e.g. coal, manure, timber, not otherwise provided for
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Abstract
The invention discloses a gradual change type blending ore stacking method, which is characterized by comprising the following steps: step 1, selecting a working surface in a stock ground, starting a stocker to reciprocate along a straight line to stack, wherein two ends of the straight line are used as a starting point and an end point of the movement of the stocker until a first layer of stockpile is formed; step 2, starting to perform second-layer stacking by taking the end point of the first-layer stacking as the starting point of the second layer, and repeating the steps in the same way, wherein the starting point of the upper-layer stacking is the same as the end point of the next-layer stacking; and 3, in the stacking process, when the height of the cantilever of the stacker reaches the upper limit and the stacker cannot reciprocate, stopping stacking. The invention solves the problem of serious segregation at the end of the blending stack in the stacking process of the blending ores in the prior art.
Description
Technical Field
The invention belongs to the technical field of a blending ore stacking method, and particularly relates to a gradual blending ore stacking method.
Background
During the process of stacking the uniformly mixed ore for sintering production, the natural segregation of the granularity of the ore powder at the head and the tail of the uniformly mixed stack leads to the segregation of the granularity and the components at the head and the tail of the stack, and the stability of the components of the uniformly mixed ore and the sintered ore is influenced.
The blending ore is piled up in a reciprocating way by the stacker in the process of piling, the layer of the piled material is formed by one-way walking, and the number of the piled material layers is generally 400-600 layers. The higher the height of the blending stack is, the thicker the layer number is, the thinner the material layer thickness of the stack is, and the quantity of the materials sliding to the stack head and the stack tail is reduced.
Disclosure of Invention
The invention aims to provide a gradual blending ore stacking method, which solves the problem of serious segregation at the end of a blending stack in the blending ore stacking process in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: a gradual change type blending ore stacking method is implemented according to the following steps:
step 1, selecting a working surface in a stock ground, starting a stocker to reciprocate along a straight line to stack, wherein two ends of the straight line are used as a starting point and an end point of the movement of the stocker until a first layer of stockpile is formed;
step 2, starting to perform second layer stacking by taking the end point of the first layer stacking as the start point of the second layer, and repeating the steps, wherein the start point of the upper layer stacking is the same as the end point of the next layer stacking, and the length of the upper layer stacking is ensured to contract inwards compared with that of the first layer stacking in the stacking process;
and 3, in the stacking process, when the height of the cantilever of the stacker reaches the upper limit and the stacker cannot reciprocate, stopping stacking.
The technical scheme of the invention also has the following characteristics:
before stacking, the traveling speed v of the stacker, the repose angle α of the kneaded ore, and the bulk density ρ of the kneaded ore per unit volume were measured.
Measuring the weight M of the mixed ore with the length of 1M in the single-layer stacking layer, and specifically calculating according to the following formula:
m ═ windrow flow ÷ (60 × v) (1)
In equation (1), the stacker flow rate does not exceed the maximum flow rate of the stacker.
Step 2, in the stacking process, ensuring that the distance of inward shrinkage of the end point of the even-numbered layer stacking material compared with the starting point of the first-layer stacking material is X1The end point of the odd-numbered layer pile is shrunk inwards by a distance X compared with the end point of the first layer pile2Specifically, it is calculated according to the following formula:
in the formulas (2) and (3), N is the number of stacked layers.
In the stacking process, the distance between the cantilever of the stacker and the stack is kept between 0.5m and 1.5m when stacking of each layer starts.
The invention has the beneficial effects that: according to the gradual change type blending ore stacking method, the inward shrinkage distance of the starting point and the terminal point of each stacked layer of the material layer thickness machine is scientifically calculated according to the traveling speed of the material stacking machine, the repose angle, the bulk specific gravity and the stacking flow parameter of the blending ore and the characteristic that the material layer thickness becomes thinner along with the increase of the number of the stacked layers in the stacking process, so that the condition that the blending ore at the end part slides downwards to the two ends in the stacking process is effectively avoided, the segregation is effectively avoided, and the quality of the blending ore is improved.
Drawings
FIG. 1 is a schematic view showing the height of each layer of a material pile in a gradual blending ore material piling method according to the present invention;
FIG. 2 is a schematic view of the repose angle in a gradual blending ore stockpiling method according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the specific drawings and embodiments.
The invention relates to a gradual change type blending ore stacking method, which is implemented according to the following steps:
step 1, selecting a working surface in a stock ground, selecting a certain length according to an actual working condition, starting a stacker to reciprocate along a straight line to stack, wherein two ends of the straight line are used as a starting point and an end point of the movement of the stacker until a first layer of stacked materials is formed;
step 2, starting to perform second layer stacking by taking the end point of the first layer stacking as the start point of the second layer, and repeating the steps, wherein the start point of the upper layer stacking is the same as the end point of the next layer stacking, and the length of the upper layer stacking is ensured to contract inwards compared with that of the first layer stacking in the stacking process;
and 3, in the stacking process, when the height of the cantilever of the stacker reaches the upper limit and the stacker cannot reciprocate, stopping stacking.
Before stacking, the traveling speed v of the stacker, the repose angle α of the kneaded ore, and the bulk density ρ of the kneaded ore are measured.
As shown in figure 1, when the material is piled, the blending ore naturally slides to the two sides of the material pile, and the included angle between the edge of the sliding blending ore and the bottom surface is called as a 'repose angle'.
Measuring the weight M of the mixed ore with the length of 1M in the single-layer material-to-material layer, and specifically calculating according to the following formula:
m ═ windrow flow ÷ (60 × v) (1)
In equation (1), the stacker flow rate does not exceed the maximum flow rate of the stacker.
Step 2, in the stacking process, ensuring that the distance of inward shrinkage of the end point of the even-numbered layer stacking material compared with the starting point of the first-layer stacking material is X1The end point of the odd-numbered layer pile is shrunk inwards by a distance X compared with the end point of the first layer pile2Specifically, it is calculated according to the following formula:
in the formulas (2) and (3), N is the number of stacked layers.
In the stacking process, the distance between the cantilever of the stacker and the stack is kept between 0.5m and 1.5m when stacking of each layer starts.
Example 1
The flow rate of the stacking material of an enterprise is 1000t/h, the repose angle alpha of the blending ore is 38 degrees, the traveling speed v of the stacking machine is 16m/min, and the specific gravity rho of the stacking machine is 2.1t/m3。
Then the weight M of the blending ore with the length of 1M in the single-layer stacking layer is 1.042t calculated according to the formula (1)
Calculating according to formula (2) and formula (3):
at the end point of the second layer or layers,
at the end point of the third layer or layers,
at the end point of the fourth layer or layers,
by analogy, the end point of the fifth layer and the sixth layer … … is calculated to be more inward-shrinking than the start point or the end point of the first layer, and the calculation results are shown in table (1):
TABLE 1
According to the gradual change type blending ore stacking method, the inward shrinkage distance of the starting point and the terminal point of each stacked layer of the material layer thickness machine is scientifically calculated according to the traveling speed of the material stacking machine, the repose angle, the bulk specific gravity and the stacking flow parameter of the blending ore and the characteristic that the material layer thickness becomes thinner along with the increase of the number of the stacked layers in the stacking process, so that the condition that the blending ore at the end part slides downwards to the two ends in the stacking process is effectively avoided, the segregation is effectively avoided, and the quality of the blending ore is improved.
Claims (5)
1. A gradual change type blending ore stacking method is characterized by comprising the following steps:
step 1, selecting a working surface in a stock ground, starting a stocker to reciprocate along a straight line to stack, wherein two ends of the straight line are used as a starting point and an end point of the movement of the stocker until a first layer of stockpile is formed;
step 2, starting to perform second layer stacking by taking the end point of the first layer stacking as the start point of the second layer, and repeating the steps, wherein the start point of the upper layer stacking is the same as the end point of the next layer stacking, and the length of the upper layer stacking is ensured to contract inwards compared with that of the first layer stacking in the stacking process;
and 3, in the stacking process, when the height of the cantilever of the stacker reaches the upper limit and the stacker cannot reciprocate, stopping stacking.
2. The method according to claim 1, wherein the traveling speed v of the stocker, the repose angle α of the kneaded ore, and the bulk density ρ of the kneaded ore per unit volume are measured before the stacking.
3. The gradual change type blending ore stacking method according to claim 2, wherein the weight M of the blending ore with the length of 1M in the single-layer material-to-material layer is measured, and is specifically calculated according to the following formula:
m ═ windrow flow ÷ (60 × v) (1)
In equation (1), the stacker flow rate does not exceed the maximum flow rate of the stacker.
4. The method of claim 1, wherein the step 2 ensures that the end point of the even-numbered layer of the stacked material is inwardly contracted by a distance X compared with the start point of the first layer of the stacked material during the stacking process1The end point of the odd-numbered layer pile is shrunk inwards by a distance X compared with the end point of the first layer pile2Specifically, it is calculated according to the following formula:
in the formulas (2) and (3), N is the number of stacked layers.
5. The method of claim 1, wherein the distance between the cantilever of the stocker and the stockpile is maintained between 0.5m and 1.5m at the beginning of the stockpiling process for each layer of the stockpiles.
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Citations (8)
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| EP0223167A2 (en) * | 1985-11-16 | 1987-05-27 | Klöckner-Humboldt-Deutz Aktiengesellschaft | Method for the homogenization of piled bulk materials |
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| CN102502281A (en) * | 2011-10-31 | 2012-06-20 | 中联重科物料输送设备有限公司 | Stacker as well as control method and device thereof |
| CN103057981A (en) * | 2012-12-14 | 2013-04-24 | 天津钢铁集团有限公司 | Contractive material stacking device and material stacking method |
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- 2021-08-24 CN CN202110974311.8A patent/CN113581871B/en active Active
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| EP0223167A2 (en) * | 1985-11-16 | 1987-05-27 | Klöckner-Humboldt-Deutz Aktiengesellschaft | Method for the homogenization of piled bulk materials |
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| CN102502281A (en) * | 2011-10-31 | 2012-06-20 | 中联重科物料输送设备有限公司 | Stacker as well as control method and device thereof |
| CN103057981A (en) * | 2012-12-14 | 2013-04-24 | 天津钢铁集团有限公司 | Contractive material stacking device and material stacking method |
| CN206278702U (en) * | 2016-08-31 | 2017-06-27 | 泰富重工制造有限公司 | Stacker reclaimer of round stock yard |
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| CN110386471A (en) * | 2019-06-28 | 2019-10-29 | 武汉钢铁有限公司 | Control method, apparatus and control equipment that stacker carries out windrow |
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