CN116043007A

CN116043007A - Method for mixing and stacking ore

Info

Publication number: CN116043007A
Application number: CN202310048312.9A
Authority: CN
Inventors: 范云飞; 李忠良; 凌羡彦; 吴聪香; 黄维
Original assignee: Maanshan Iron and Steel Co Ltd
Current assignee: Maanshan Iron and Steel Co Ltd
Priority date: 2023-01-31
Filing date: 2023-01-31
Publication date: 2023-05-02

Abstract

A mixing ore stacking method belongs to the technical field of ore blending, and comprises the following steps: selecting a working surface in a stock yard, starting a stacker to perform reciprocating stacking along a straight line to form N stacking layers I which are parallel to each other, wherein N is more than or equal to 2; stacking in the ditch I formed by two adjacent stacking layers I to form N-1 stacking layers II; stacking in a ditch II formed by the stacking layer II and two adjacent stacking layers I to form a stacking layer III; if n=2, stopping stacking; if N is more than 2, continuing to stack on the stacking layer III according to the methods of the step 2 and the step 3 until a large stack with a triangular longitudinal section is formed; the invention has the beneficial effects that by changing the stacking process and stacking form of the uniformly mixed large pile, large-granularity materials are blocked in the middle of the large pile, the large-granularity materials are prevented from naturally falling to the pile angle for concentration, and the influence of granularity segregation on the uniformly mixed large pile is reduced.

Description

Method for mixing and stacking ore

Technical Field

The invention relates to the technical field of ore blending, in particular to a blending ore stacking method.

Background

The ore mixing is a conventional raw material pretreatment method in the metallurgical industry, and by mixing various ore raw materials according to the proportion, the mixed ore with stable components and grade meeting the target requirements is formed, the sintering and blast furnace production stability can be greatly improved, meanwhile, in the ore mixing process, the production cost can be reduced and the solid waste treatment capacity is reduced by adding iron-containing materials such as low-cost ore, metallurgical dust and the like, so that the raw material mixing process is provided in the previous process of sintering in most industries.

When raw materials are piled up, because different ore varieties have different chemical compositions and granularity performance, in the piling process, massive materials can naturally scatter to a piling angle because of large falling kinetic energy, and massive materials on the piling surface always roll to the bottommost layer when being piled up gradually and lifted, so that the granularity of the bottom materials is large, the components of the whole section are unevenly distributed, and the granularity and the components of the whole piling are segregated due to natural segregation of the granularity of the ore, thereby influencing the stability of the components of the evenly mixed ore.

The patent with publication number of CN113581871A discloses a gradual-change type mixing ore stacking method, which comprises the following specific 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 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 stacking method can enable the materials with large granularity to fall to the bottom of the outer side of the stacking layer, and the problem of granularity segregation still exists.

Disclosure of Invention

In order to solve the technical problems, the invention provides a mixing ore stacking method, which is characterized in that large-granularity materials are blocked in the middle of a large pile by changing the stacking process and stacking form of a mixing large pile, so that the large-granularity materials are prevented from naturally rolling down to a pile angle to be concentrated, and the influence of granularity segregation on the mixing large pile is reduced.

In order to achieve the above purpose, the technical scheme adopted by the invention for solving the technical problems is as follows: the mixing ore stacking method comprises the following steps:

step 1: selecting a working surface in a stock yard, starting a stacker to perform reciprocating stacking along a straight line to form N stacking layers I which are parallel to each other, wherein N is more than or equal to 2;

step 2: stacking in the ditch I formed by two adjacent stacking layers I to form N-1 stacking layers II;

step 3: stacking in a ditch II formed by the stacking layer II and two adjacent stacking layers I to form a stacking layer III;

step 4: if n=2, stopping stacking; if N >2, continuing to stack on the stacking layer III according to the methods of the step 2 and the step 3 until a large stack with a triangular longitudinal section is formed.

The material weights of the stacking layer I, the stacking layer II and the stacking layer III are equal, the volumes of the stacking layer I, the stacking layer II and the stacking layer III are equal, and the lengths of the stacking layer I, the stacking layer II and the stacking layer III are equal.

The longitudinal section of the ditch I formed by two adjacent stacking layers I is V-shaped, and the intersecting line at the bottom of the ditch I is parallel to the side edges at the top of the stacking layers I.

The connecting line between the end point and the starting point of two adjacent stacking layers I is perpendicular to the top side edge of the stacking layer I.

When N >2, the connecting line between the end point and the starting point of two adjacent stacking layers III is perpendicular to the top side edge of the stacking layer III.

The end point of the stacking layer II is the starting point of the stacking layer III.

And a ditch II with a W-shaped longitudinal section is formed between the stacking layer II and two adjacent stacking layers I, and the stacking layer III is formed on the ditch II.

And two sides of the stacking layer III are intersected with the top side edges of the two adjacent stacking layers I.

The large material pile is characterized in that the stacker is arranged on one side of the large material pile, and a sliding track at the bottom of the stacker is parallel to the side edge at the top of the large material pile.

The stacker comprises a machine body and a cantilever which is rotationally connected with the machine body, and the distance between the sliding track and the blanking point of the farthest stacker layer I is smaller than the length of the cantilever.

The beneficial effects of the invention are as follows:

according to the invention, the stacking process of the large pile is optimized, a plurality of blanking points are distributed, the large pile is stacked in stages, a plurality of mutually parallel stacking layers I are stacked on a working surface, after a ditch I is formed between two adjacent stacking layers I, a stacking layer II is stacked on the ditch I, and a stacking layer III is formed on the stacking layer II in a stacking manner, so that the large pile with a triangular longitudinal section is formed, the large pile is rolled onto a slope of the ditch naturally, the large pile cannot roll onto the bottom of the large pile, the large pile can be easily taken away by a blending reclaimer during material taking, and the influence of granularity segregation on the blending large pile is reduced.

Drawings

The contents of the drawings and the marks in the drawings of the present specification are briefly described as follows:

fig. 1 is a schematic structural diagram of a mixed mineral aggregate according to the present invention when n=2;

fig. 2 is a schematic structural view of a longitudinal section of a large stockpile when n=2;

fig. 3 is a schematic view of the structure of a longitudinal section of a large stockpile when n=3;

the labels in the above figures are: 1. the stacking machine comprises a machine body 11, a machine body 12, a cantilever 13, a sliding track 2, a stacking layer I, a ditch 4, a stacking layer II, a ditch 5, a stacking layer III, a ditch 7, a ditch III, a stacking layer 8, a ditch 9, a stacking layer IV and a stacking layer V.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

The specific embodiment of the invention is as follows: as shown in fig. 1 to 3, the invention provides a method for mixing and stacking ores, which comprises the following steps:

step 1: selecting a working surface in a stock ground, starting a stacker 1 to perform reciprocating stacking along a straight line to form N stacking layers I2 which are parallel to each other, wherein N is more than or equal to 2;

step 2: stacking in a ditch I3 formed by two adjacent stacking layers I2 to form N-1 stacking layers II 4;

step 3: stacking in a ditch II 5 formed by the stacking layer II 4 and two adjacent stacking layers I2 to form a stacking layer III 6;

step 4: if n=2, stopping stacking; if N >2, continuing to stack on the stacking layer III 6 according to the methods of the step 2 and the step 3 until a large stack with a triangular longitudinal section is formed.

The material weights of the stacking layers I2, II 4 and III 6 are equal, the volumes of the stacking layers I2, II 4 and III 6 are equal, and the lengths of the stacking layers I2, II 4 and III 6 are equal. The flow of the reciprocating stockpiling of the stocker 1 is equal, and the uniformity of the grain size distribution of the stockpiling can be improved.

The longitudinal section of the ditch I3 formed by the two adjacent stacking layers I2 is V-shaped, intersecting lines at the bottom of the ditch I3 are parallel to the lateral edges at the top of the stacking layers I2, the bottoms of the two adjacent stacking layers I2 are not overlapped, the stacking consistency of the stacking layers I2 is ensured, and the stacking granularity distribution uniformity is further improved.

The connecting line between the end point and the starting point of two adjacent stacking layers I2 is vertical to the top side edge of the stacking layer I2; when N is more than 2, the connecting line between the end point and the starting point of two adjacent stacking layers III 6 is vertical to the top side edge of the stacking layer III 6; the end point of the stacking layer II 4 is the starting point of the stacking layer III 6, so that the reciprocating stacking paths of the stacking layers I2, II 4 or III 6 are short and easy to control.

A ditch II 5 with a W-shaped longitudinal section is formed between the material stacking layer II 4 and two adjacent material stacking layers I2, a material stacking layer III 6 is formed on the ditch II 5 by stacking, and two sides of the material stacking layer III 6 are intersected with the top lateral edges of the two adjacent material stacking layers I2, so that massive materials in the material stacking layers II 4 and III 6 naturally roll on a ditch inclined plane and cannot roll on the bottom of a massive material stack, and the massive material can be easily taken away by a mixing reclaimer during material taking, so that the influence of particle size segregation on the mixing massive stack is reduced.

Specifically, a stacker 1 is arranged on one side of a large material pile, a sliding rail 13 at the bottom of the stacker 1 is parallel to the top side edge of the large material pile, the stacker 1 further comprises a machine body 11 and a cantilever 12 rotatably connected to the machine body 11, the machine body 11 is slidably connected to the sliding rail 13, the distance from the sliding rail 13 to the blanking point of the farthest material pile layer I2 is smaller than the length of the cantilever 12, the blanking point of the corresponding material pile layer can be determined by only rotating the cantilever 12 to adjust the angle, and after the angle of the cantilever 12 is determined, the machine body 11 is slid along the sliding rail 13, so that reciprocating material pile can be realized.

The following describes the method for stacking the mixed ore according to the present invention by way of specific examples.

Example 1

As shown in fig. 1 and 2, when n=2, the method for mixing and stacking mineral according to the present invention comprises the steps of:

step 1: selecting a working surface in a stock yard, enabling the working surface to be located on one side of the stacker 1, starting the stacker 1 to perform linear reciprocating stacking along a direction parallel to a sliding track 13 of the stacker 1, enabling the stacker 1 to move at a uniform speed, and enabling the discharging amount to be constant.

Firstly, adjusting a cantilever 12 of a stacker 1 to enable a blanking point to be positioned at the 1/4 central line of a large material pile finally formed, and moving a machine body 11 along a sliding guide rail to perform stacking to form a first stacking layer I2; then, the cantilever 12 of the stacker 1 rotates by a set angle, so that the blanking point is located at the 3/4 central line of the large material pile finally formed, and the terminal connecting line of the blanking point and the last stacking layer I2 is perpendicular to the top side edge (or sliding guide rail) of the stacking layer I2, and the machine body 11 is moved along the sliding guide rail to stack materials, so that a second stacking layer I2 is formed. A ditch I3 is formed between the two stacking layers I2, an intersecting line at the bottom of the ditch I3 is parallel to the side edges at the top of the stacking layers I2, and the two stacking layers I2 intersect without overlapping.

Step 2: the cantilever 12 of the stacker 1 rotates a set angle to enable the blanking point to be positioned at one end of the central line of the ditch I3; the cantilever 12 reciprocates in the ditch I3 formed by the two stacking layers I2 along the length direction to stack, so as to form a stacking layer II 4 which is equal in weight, volume and length to the stacking layer I2, and a ditch II 5 with a W-shaped longitudinal section is formed between the stacking layer II 4 and the two stacking layers I2.

Step 3: and stacking in the ditch II 5 along the length direction by taking the end point of the stacking layer II 4 as a starting point to form a stacking layer III 6 which is equal in weight, volume and length to the stacking layer I2, so that two sides of the stacking layer III 6 are intersected with the top side edges of two adjacent stacking layers I2 to form a large material pile with a triangular longitudinal section.

Example 2

As shown in fig. 3, when n=3, the method for mixing and stacking mineral according to the present invention comprises the steps of:

Firstly, adjusting a cantilever 12 of a stacker 1 to enable a blanking point to be positioned at the center line of 1/6 of a large material pile finally formed, and moving a machine body 11 along a sliding guide rail to perform stacking to form a first stacking layer I2; then, the cantilever 12 of the stacker 1 rotates by a set angle, so that a blanking point is positioned at the 1/2 central line of the finally formed large material stack, the terminal connecting line of the blanking point and the last stacking layer I2 is vertical to the top side edge (or the sliding guide rail) of the stacking layer I2, and the machine body 11 is moved along the sliding guide rail to stack so as to form a second stacking layer I2; finally, the cantilever 12 of the stacker 1 rotates by a set angle, so that the blanking point is positioned at the center line of 5/6 of the finally formed large material pile, and the terminal connecting line of the blanking point and the last stacking layer I2 is perpendicular to the top side edge (or the sliding guide rail) of the stacking layer I2, and the machine body 11 is moved along the sliding guide rail to stack materials to form a third stacking layer I2. A ditch I3 with a V-shaped longitudinal section is formed between two adjacent stacking layers I2, an intersecting line at the bottom of the ditch I3 is parallel to the side edges at the top of the stacking layers I2, and the two stacking layers I2 intersect and do not overlap.

Step 2: firstly, the cantilever 12 of the stacker 1 rotates a set angle to enable a blanking point to be positioned at one end of one ditch I3; then, the machine body 11 moves along the sliding guide rail, so that the cantilever 12 moves back and forth in the length direction of the ditch I3 to stack materials, and a stacking layer II 4 which is equal in weight, volume and length to the stacking layer I2 is formed; finally, the same method is adopted, so that the blanking point is positioned at one end of the other ditch I3, and the blanking point moves back and forth along the length direction of the ditch I3 to be piled up, so that the other pile layer II 4 is formed. And a ditch II 5 with a W-shaped longitudinal section is formed between the two stacking layers II 4 and the two adjacent stacking layers I2.

Step 3: the cantilever 12 of the stacker 1 rotates by a set angle, so that the blanking point is the end point of the corresponding stacking layer II 4, stacking is performed in the corresponding ditch II 5 along the length direction of the stacking layer, and finally two stacking layers III 6 which are equal in weight, volume and length to the stacking layer I2 are formed, so that the two sides of each stacking layer III 6 are intersected with the top side edges of the two adjacent stacking layers I2. A trench III 7 with a V-shaped longitudinal section is formed between the two stacking layers III 6.

Step 4: according to the method of the step 2, the angle of the cantilever 12 is continuously adjusted, so that the blanking point is positioned at one end of the ditch III 7, the ditch I3 is piled up by reciprocating along the length direction of the ditch, a piled up layer IV 8 which is equal in weight and volume to the piled up layer I2 and equal in length is formed, and a ditch IV 9 with a W-shaped longitudinal section is formed between the piled up layer IV 8 and the two piled up layers III 6.

Step 5: according to the method of step 3, the angle of the cantilever 12 is continuously adjusted, the blanking point is the end point of the stacking layer IV 8, stacking is carried out in the stacking layer IV 8 along the length direction of the stacking layer, and finally two stacking layers V10 which are equal in weight and volume and equal in length to the stacking layer I2 are formed, so that two sides of the stacking layers V10 are intersected with the top side edges of the two stacking layers III 6, and a large material pile with a triangular longitudinal section is formed.

In conclusion, the large-granularity materials are blocked in the middle of the large pile by changing the stacking process and stacking form of the uniformly mixed large pile, so that the large-granularity materials are prevented from naturally rolling to the pile angle for concentration, and the influence of granularity segregation on the uniformly mixed large pile is reduced.

The foregoing is provided by way of illustration of the principles of the present invention, and is not intended to be limited to the specific constructions and applications illustrated herein, but rather to all modifications and equivalents which may be utilized as fall within the scope of the invention as defined in the claims.

Claims

1. The method for mixing and stacking the ores is characterized by comprising the following steps of:

2. The method of blending ore stacking as recited in claim 1, wherein: the material weights of the stacking layer I, the stacking layer II and the stacking layer III are equal, the volumes of the stacking layer I, the stacking layer II and the stacking layer III are equal, and the lengths of the stacking layer I, the stacking layer II and the stacking layer III are equal.

3. The method of blending ore stacking as recited in claim 1, wherein: the longitudinal section of the ditch I formed by two adjacent stacking layers I is V-shaped, and the intersecting line at the bottom of the ditch I is parallel to the side edges at the top of the stacking layers I.

4. The method of blending ore stacking as recited in claim 1, wherein: the connecting line between the end point and the starting point of two adjacent stacking layers I is perpendicular to the top side edge of the stacking layer I.

5. The method of blending ore stacking as recited in claim 1, wherein: when N >2, the connecting line between the end point and the starting point of two adjacent stacking layers III is perpendicular to the top side edge of the stacking layer III.

6. The method of blending ore stacking as recited in claim 1, wherein: the end point of the stacking layer II is the starting point of the stacking layer III.

7. The method of blending ore stacking as recited in claim 1, wherein: and a ditch II with a W-shaped longitudinal section is formed between the stacking layer II and two adjacent stacking layers I, and the stacking layer III is formed on the ditch II.

8. The method of blending ore stacking as recited in claim 1, wherein: and two sides of the stacking layer III are intersected with the top side edges of the two adjacent stacking layers I.

9. The method of blending ore stacking as recited in claim 1, wherein: the large material pile is characterized in that the stacker is arranged on one side of the large material pile, and a sliding track at the bottom of the stacker is parallel to the side edge at the top of the large material pile.

10. The method of blending ore stacking of claim 9, wherein: the stacker further comprises a machine body and a cantilever which is rotationally connected with the machine body, wherein the machine body is connected to the sliding track in a sliding mode, and the distance between the sliding track and the blanking point of the farthest stacker layer I is smaller than the length of the cantilever.