CN113581871B - Gradual-change type mixing ore stacking method - Google Patents
Gradual-change type mixing ore stacking method Download PDFInfo
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- CN113581871B CN113581871B CN202110974311.8A CN202110974311A CN113581871B CN 113581871 B CN113581871 B CN 113581871B CN 202110974311 A CN202110974311 A CN 202110974311A CN 113581871 B CN113581871 B CN 113581871B
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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 mixing ore stacking method which is characterized by comprising the following steps of: step 1, selecting a working surface in a stock yard, starting a stacker to reciprocate along a straight line to perform stacking, wherein two ends of the straight line serve as a starting point and a finishing point of the stacker to form a first layer of stacking; 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 stacking, and analogizing the beginning point of the upper-layer stacking to be the same as the end point of the lower-layer stacking; and 3, stopping stacking when the cantilever height of the stacker reaches the upper limit and the stacker cannot reciprocate in the stacking process. The invention solves the problem of serious segregation at the end part of the blending stack in the stacking process of the blending ore in the prior art.
Description
Technical Field
The invention belongs to the technical field of mixing ore stacking methods, and particularly relates to a gradual mixing ore stacking method.
Background
In the process of stacking the mixed ore for sintering production, the particle size of the tailings of the head and tail of the mixed pile is naturally segregated, so that segregation exists in the components, and the stability of the components of the mixed ore and the sintered ore is affected.
The mixed ore is piled up in a reciprocating way through a stacker in the piling process, one layer of piled up is formed by one-step walking, and the layer number of piled up is generally 400-600. The higher the height of the uniformly mixed pile, the thicker the layer number, the thinner the layer thickness of the pile, and the number of the piles sliding down towards the heads and the tails of the piles is reduced.
Disclosure of Invention
The invention aims to provide a gradual-change type mixing ore stacking method, which solves the problem of serious segregation at the end part of a mixing stack in the stacking process of mixing ores in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the gradual-change type mixing ore stacking method is implemented according to the following steps:
step 1, selecting a working surface in a stock yard, starting a stacker to reciprocate along a straight line to perform stacking, wherein two ends of the straight line serve as a starting point and a finishing point of the stacker to form a first layer of stacking;
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 stacking, and so on, wherein the start point of the upper-layer stacking is the same as the end point of the lower-layer stacking, and the length of the upper-layer stacking is ensured to shrink inwards compared with the length of the first-layer stacking in the stacking process;
and 3, stopping stacking when the cantilever height of the stacker reaches the upper limit and the stacker cannot reciprocate in the stacking process.
The technical scheme of the invention also has the following characteristics:
the running speed v of the stacker, the repose angle α of the blended ore, and the bulk specific gravity ρ of the blended ore per unit volume were measured before stacking.
The weight M of the mixed ore with the length of 1M in the single-layer stacking layer is measured, and is calculated according to the following formula:
m=stacker flow rate ≡60×v (1)
In the formula (1), the stacking flow does not exceed the maximum flow of the stacker.
Step 2, in the stacking process, ensuring that the inward shrinking distance of the end point of the even-numbered layer stacking compared with the starting point of the first layer stacking is X 1 The end point of the odd-layer stacking material is shrunk inwards by X compared with the end point of the first-layer stacking material 2 Specifically calculated according to the following formula:
in the formulas (2) and (3), N is the number of stacking layers.
In the stacking process, when each layer of stacking starts, the distance between a cantilever of the stacker and a material pile is kept between 0.5m and 1.5m.
The beneficial effects of the invention are as follows: according to the gradual change type mixing ore stacking method, according to the travelling speed of the stacking machine, the repose angle, the bulk specific gravity and the stacking flow parameters of the mixing ore, the characteristics of thinning of the material layer along with the increase of the stacking layer number in the stacking process are combined, the inward shrinkage distance of the starting point and the end point of each layer of the material layer thickness machine is scientifically calculated, the downward sliding of the mixing ore at the end part towards the two ends in the stacking process is effectively avoided, and the quality of the mixing ore is improved.
Drawings
FIG. 1 is a schematic view showing the height of each layer of material pile in a gradual type mixing ore stacking method according to the present invention;
fig. 2 is a schematic view of a repose angle in a gradual type mixing ore stacking method according to the present invention.
Detailed Description
The invention is described in detail below with reference to the attached drawings and the detailed description.
The invention discloses a gradual-change type mixing ore stacking method, which is implemented according to the following steps:
step 1, selecting a working surface in a stock yard, selecting a certain length according to actual working conditions, starting a stacker to reciprocate along a straight line to perform stacking, wherein two ends of the straight line serve as a starting point and a finishing point of the stacker to form a first layer of stacking;
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 stacking, and so on, wherein the start point of the upper-layer stacking is the same as the end point of the lower-layer stacking, and the length of the upper-layer stacking is ensured to shrink inwards compared with the length of the first-layer stacking in the stacking process;
and 3, stopping stacking when the cantilever height of the stacker reaches the upper limit and the stacker cannot reciprocate in the stacking process.
The traveling speed v of the stacker, the repose angle α of the blended ore, and the bulk specific gravity ρ of the blended ore were measured before stacking.
As shown in fig. 1, during stacking, the mixed ore naturally slides down to two sides of the stack, and the included angle between the edge and the bottom surface of the sliding mixed ore is called as a "repose angle".
The weight M of the mixed ore with the length of 1M in the single-layer opposite material layer is measured, and is calculated according to the following formula:
m=stacker flow rate ≡60×v (1)
In the formula (1), the stacking flow does not exceed the maximum flow of the stacker.
Step 2, in the stacking process, ensuring that the inward shrinking distance of the end point of the even-numbered layer stacking compared with the starting point of the first layer stacking is X 1 The end point of the odd-layer stacking material is shrunk inwards by X compared with the end point of the first-layer stacking material 2 Specifically calculated according to the following formula:
in the formulas (2) and (3), N is the number of stacking layers.
In the stacking process, when each layer of stacking starts, the distance between a cantilever of the stacker and a material pile is kept between 0.5m and 1.5m.
Example 1
The stacking flow of an enterprise is 1000t/h, the blending ore repose angle alpha is 38 degrees, the traveling speed v of a stacker is 16m/min, and the bulk specific gravity rho is 2.1t/m 3 。
The weight M of the mixed ore with the length of 1M in the single-layer stacking layer is 1.042t according to the formula (1)
Calculated according to equation (2) and equation (3):
at the end point of the second layer,
at the end point of the third layer,
at the end point of the fourth layer,
similarly, the calculation results of the end points of the fifth and sixth layers … … are shown in table (1) below, as compared with the start point or end point of the first layer:
TABLE 1
According to the gradual change type mixing ore stacking method, according to the travelling speed of the stacking machine, the repose angle, the bulk specific gravity and the stacking flow parameters of the mixing ore, the characteristics of thinning of the material layer along with the increase of the stacking layer number in the stacking process are combined, the inward shrinkage distance of the starting point and the end point of each layer of the material layer thickness machine is scientifically calculated, the downward sliding of the mixing ore at the end part towards the two ends in the stacking process is effectively avoided, and the quality of the mixing ore is improved.
Claims (2)
1. The gradual-change type mixing ore stacking method is characterized by comprising the following steps of:
step 1, selecting a working surface in a stock yard, starting a stacker to reciprocate along a straight line to perform stacking, wherein two ends of the straight line serve as a starting point and a finishing point of the stacker to form a first layer of stacking;
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 stacking, and so on, wherein the start point of the upper-layer stacking is the same as the end point of the lower-layer stacking, and the length of the upper-layer stacking is ensured to shrink inwards compared with the length of the first-layer stacking in the stacking process;
step 3, stopping stacking when the height of the cantilever of the stacker reaches the upper limit and the stacker cannot reciprocate in the stacking process;
measuring the running speed v of the stacker, the repose angle alpha of the mixed ore and the bulk specific gravity rho of the mixed ore in unit volume before stacking;
the weight M of the mixed ore with the length of 1M in the single-layer opposite material layer is measured, and is calculated according to the following formula:
m=stacker flow rate ≡60×v (1)
In the formula (1), the stacking flow does not exceed the maximum flow of the stacker;
in the step 2, in the stacking process, the distance that the end point of the even-numbered layer of stacks is shrunk inwards compared with the starting point of the first layer of stacks is ensured to be X 1 The end point of the odd-layer stacking material is shrunk inwards by X compared with the end point of the first-layer stacking material 2 Specifically calculated according to the following formula:
in the formulas (2) and (3), N is the number of stacking layers.
2. The method of claim 1, wherein the distance between the stacker boom and the pile is maintained between 0.5m and 1.5m at the start of each layer of pile during the stacking process.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3540744A1 (en) * | 1985-11-16 | 1987-05-21 | Kloeckner Humboldt Deutz Ag | METHOD FOR THE HOMOGENIZATION OF SCHUETTGUT ON A HALL |
| CN100441488C (en) * | 2006-03-20 | 2008-12-10 | 沈阳矿山机械（集团）有限责任公司 | Materials piling method at end of rectangular pre-equalizing materials field |
| CN102502281B (en) * | 2011-10-31 | 2014-10-01 | 中联重科物料输送设备有限公司 | Stacker as well as control method and device thereof |
| CN103057981B (en) * | 2012-12-14 | 2015-06-03 | 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 |
| CN109279379B (en) * | 2018-11-06 | 2021-03-05 | 陕钢集团汉中钢铁有限责任公司 | Method for stacking materials based on counting device |
| CN110386471B (en) * | 2019-06-28 | 2021-06-29 | 武汉钢铁有限公司 | Method and device for controlling stacker to stack materials and control equipment |
| CN111302087A (en) * | 2020-03-04 | 2020-06-19 | 首钢京唐钢铁联合有限责任公司 | Uniformly-mixing and stacking method |
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