CN116043007A - Method for mixing and stacking ore - Google Patents

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

A method of mixing ore stockpiling

technical field

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

Background technique

Ore mixing is a conventional raw material pretreatment method in the metallurgical industry. By mixing various ore raw materials according to the ratio, a mixed ore with stable composition and grade meeting the target requirements can be formed, which can greatly improve the stability of sintering and blast furnace production. At the same time, by adding some low-cost ore, metallurgical dust and other iron-containing materials in the process of ore blending, the production cost can be reduced and the amount of solid waste treatment can be reduced. Therefore, most industries are equipped with a raw material mixing process in the pre-sintering process.

During the accumulation of raw materials, different ore types have different chemical compositions and particle size properties. During the accumulation process, large pieces of material will naturally scatter to the corner of the pile due to their high falling kinetic energy. Large piles are gradually piled up. When the pile height is raised, The bulk material on the stacking surface tends to roll down to the bottom layer, resulting in large particle size of the bottom material and uneven composition distribution of the entire cross-section, resulting in segregation of the particle size and composition of the entire stack due to the natural segregation of the ore size, thus affecting the composition of the mixed ore stability.

The patent publication number is CN113581871A discloses a kind of gradient type mixed ore stacking method, the specific steps of the method are as follows: Step 1, select the working surface in the stockyard, start the stocker and carry out stockpiling along a straight line reciprocating motion, the straight line The two ends of the stacker are used as the starting point and end point of the stacker movement until the first layer of stockpiling is formed; step 2, the end point of the first layer of stockpiling is used as the starting point of the second layer to start the second layer of stockpiling, and so on. The starting point of one layer of stacking is the same as the end point of the next layer of stacking; step 3, during the stacking process, when the height of the stacker cantilever reaches the upper limit and the stacker cannot perform reciprocating motion, stop stacking. This layered stacking method will cause large-grained materials to roll down to the outer bottom of the stacking layer, and there is still the problem of particle size segregation.

Contents of the invention

In order to solve the above technical problems, the present invention provides a method of mixing ore stockpiling, by changing the stacking process and stacking form of the large-grained pile, the large-grained materials are blocked in the middle of the large pile, and the large-sized materials are prevented from naturally rolling down to the pile. Angular concentration, reducing the impact of particle size segregation on mixing large piles.

In order to achieve the above object, the technical solution adopted by the present invention to solve the technical problems is: the method for mixing ore stockpiling comprises the following steps:

Step 1: Select the working surface in the stockyard, start the stacker to stack materials reciprocally along a straight line, and form N stacking layers I parallel to each other, N≥2;

Step 2: Stockpile materials in ditch I formed by two adjacent stockpiling layers I to form N-1 stockpiling layers II;

Step 3: stacking materials in the ditch II formed by the stockpiling layer II and two adjacent stockpiling layers I to form the stockpiling layer III;

Step 4: If N=2, then stop stockpiling; if N>2, continue stockpiling on the stockpiling layer III according to the method of step 2 and step 3, until a large stockpile with a triangular longitudinal section is formed.

The material weights of the material accumulation layer I, the material accumulation layer II and the material accumulation layer III are equal, the volumes of the material accumulation layer I, the material accumulation layer II and the material accumulation layer III are equal, and the material accumulation layer I, the material accumulation layer The material layer II and the stacking layer III have the same length.

The longitudinal section of the trench I formed by two adjacent stockpiling layers I is V-shaped, and the intersection line at the bottom of the trench I is parallel to the side edge at the top of the stockpiling layer I.

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

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

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

A trench II with a W-shaped longitudinal section is formed between the stockpiling layer II and two adjacent stockpiling layers I, and stockpiling on the trench II forms the stockpiling layer III.

The two sides of the material accumulation layer III intersect with the top side edges of two adjacent material accumulation layers I.

The stocker is arranged on one side of the large stockpile, and the sliding track at the bottom of the stocker is parallel to the top side edge of the large stockpile.

The stocker includes a machine body and a cantilever rotatably connected thereto, and the distance from the sliding track to the furthest material-filling layer I blanking point is less than the length of the cantilever.

The beneficial effects of the present invention are:

In the present invention, by optimizing the stacking process of large piles and distributing multiple blanking points, the large piles are piled up in stages. First, multiple stacking layers I parallel to each other are stacked on the working surface, so that two adjacent stacking layers After the ditch Ⅰ is formed between Ⅰ, the stockpiling layer II is piled up on the trench Ⅰ, and then the stockpiling layer Ⅲ is formed on the stockpiling layer Ⅱ, and so on until a large stockpile with a triangular longitudinal section is formed, so that the large The material naturally rolls down to the inclined surface of the ditch instead of rolling down to the bottom of the large pile, and can be easily taken away by the mixing reclaimer when retrieving the material, which reduces the impact of particle size segregation on the mixing pile.

Description of drawings

The content expressed in each accompanying drawing of the description of the present invention and the marks in the figure are briefly described below:

Fig. 1 is when N=2, the structural representation of the mixed ore stockpiling of the present invention;

Fig. 2 is when N=2, the structural representation of the longitudinal section of large material pile;

Fig. 3 is when N=3, the structural representation of the longitudinal section of large material pile;

The marks in the above pictures are: 1. Stocker, 11. Body, 12. Cantilever, 13. Slide track, 2. Stocking layer Ⅰ, 3. Ditch Ⅰ, 4. Stocking layer Ⅱ, 5. Ditch Ⅱ , 6. Stockpile layer Ⅲ, 7. Ditch Ⅲ, 8. Stockpile layer Ⅳ, 9. Ditch Ⅳ, 10. Stockpile layer Ⅴ.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention , but not to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The specific embodiment of the present invention is: as shown in Fig. 1～Fig. 3, the present invention provides a kind of mixed ore stockpiling method, comprises the following steps:

Step 1: Select the working surface in the stockyard, start the stacker 1 to stack materials reciprocally along a straight line, and form N stacking layers I2 parallel to each other, N≥2;

Step 2: Stockpile materials in the ditch I3 formed by two adjacent stockpiling layers I2 to form N-1 stockpiling layers II4;

Step 3: Stockpile in the ditch II5 formed by the stockpiling layer II4 and two adjacent stockpiling layers I2 to form the stockpiling layer III6;

Step 4: If N=2, then stop stockpiling; if N>2, then continue stockpiling on the stockpiling layer III6 according to the method of step 2 and step 3, until forming a large stockpile with a triangular longitudinal section.

The material weights of the stockpiles I2, stockpiles II4 and III6 are equal, and the volumes of the stockpiles I2, II4 and III6 are equal, and the stockpiles I2, stockpiles The lengths of II4 and III6 are equal. Making the reciprocating stacking flow of the stacker 1 equal can improve the uniformity of the particle size distribution of the stacking.

The longitudinal section of the trench I3 formed by two adjacent stockpiles I2 is V-shaped, the intersection line at the bottom of the trench I3 is parallel to the top side edge of the stockpiles I2, and the bottoms of the two adjacent stockpiles I2 do not overlap , which ensures the consistency of the stockpiling layer I2 and further improves the uniformity of the particle size distribution of the stockpiling.

The line between the end points and the starting points of two adjacent stacking layers I2 is perpendicular to the top side edge of the stacking layer I2; when N>2, the line between the end points and the starting points of two adjacent stacking layers The connecting line between them is perpendicular to the top side edge of the stockpiling layer III6; the end point of the stockpiling layer II4 is the starting point of the stockpiling layer III6, so that multiple stockpiling layers I2, stockpiling layer II4 or stockpiling layer III6 The reciprocating stacking path is short and easy to control.

Among them, a ditch II5 with a W-shaped longitudinal section is formed between the stacking layer II4 and two adjacent stacking layers I2, and the stacking layer III6 is formed on the ditch II5, and the two sides of the stacking layer III6 are adjacent to the two The top side edges of the stockpile layer I2 intersect, so that the bulk materials in the stockpile layer II4 and the stockpile layer III6 will naturally roll down to the inclined surface of the ditch instead of rolling down to the bottom of the large stockpile, and the material can be easily retrieved. It is taken away by the mixing reclaimer, which reduces the impact of particle size segregation on the mixing pile.

Specifically, a stocker 1 is arranged on one side of the large stockpile, and the slide track 13 at the bottom of the stocker 1 is parallel to the top side edge of the large stockpile. The stocker 1 also includes a body 11 and a rotating connection The cantilever 12 on it, the machine body 11 is slidably connected on the sliding track 13, the distance between the sliding track 13 and the farthest material layer I2 blanking point is less than the length of the cantilever 12, which ensures that it can be adjusted only by rotating the cantilever 12 The angle can determine the blanking point of the corresponding stacking layer. After the angle of the cantilever 12 is determined, slide the body 11 along the sliding track 13 to realize reciprocating stacking.

The stacking method of the mixed ore of the present invention is illustrated below through specific examples.

Example 1

As shown in Fig. 1 and Fig. 2, when N=2, the mixed ore stockpiling method of the present invention comprises the following steps:

Step 1: Select the working surface in the stockyard so that the working surface is located on one side of the stacker 1, start the stacker 1 to carry out linear reciprocating stacking along the direction parallel to the sliding track 13 of the stacker 1, and the stacker 1 Uniform motion, and the output volume is constant.

First, adjust the cantilever 12 of the stacker 1 so that the material drop point is located at the center line of 1/4 of the final large material pile, and move the machine body 11 along the sliding guide rail to carry out the material accumulation to form the first material accumulation layer I2 ; Then, the cantilever 12 of the stocker 1 rotates the set angle, so that the blanking point is located at the center line of 3/4 of the final large stockpile, and the blanking point is connected with the end point of the previous stockpiling layer I2 The line is perpendicular to the top edge (or sliding guide rail) of the stacking layer I2, and the machine body 11 is moved along the sliding guide rail for stacking to form the second stacking layer I2. A trench I3 is formed between the two stockpiling layers I2, the intersection line at the bottom of the trench I3 is parallel to the top side edge of the stockpiling layer I2, and the two stockpiling layers I2 intersect without overlapping.

Step 2: The cantilever 12 of the stacker 1 rotates at a set angle so that the material drop point is located at one end of the center line of the ditch I3; the cantilever 12 reciprocates along its length in the ditch I3 formed by the two stacking layers I2 for stacking , forming a stockpile layer II4 with the same weight, volume and length as the stockpile layer I2, and a trench II5 with a W-shaped longitudinal section formed between the stockpile layer II4 and the two stockpile layers I2.

Step 3: Starting from the end point of the stockpiling layer II4, stockpiling in the ditch II5 along its length direction to form a stockpiling layer III6 with the same weight, volume and length as the stockpiling layer I2, so that the stockpiling layer III6 The two sides intersect with the top side edges of two adjacent stockpile layers I2 to form a large stockpile with a triangular longitudinal section.

Example 2

As shown in Figure 3, when N=3, the mixed ore stockpiling method of the present invention comprises the following steps:

Step 1: Select the working surface in the stockyard so that the working surface is located on one side of the stacker 1, start the stacker 1 to carry out linear reciprocating stacking along the direction parallel to the sliding track 13 of the stacker 1, and the stacker 1 Uniform motion, and the output volume is constant.

First, adjust the cantilever 12 of the stacker 1 so that the material drop point is located at the center line of 1/6 of the final large material pile, and move the machine body 11 along the sliding guide rail to carry out the material accumulation to form the first material accumulation layer I2 ; Then, the cantilever 12 of the stacker 1 rotates the set angle, so that the blanking point is located at the midline of 1/2 of the final large stockpile, and the blanking point is connected with the end point of the previous stockpiling layer I2 The line 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 for stacking to form the second stacking layer I2; finally, the cantilever 12 of the stacker 1 rotates to set Angle, so that the blanking point is located at the centerline of 5/6 of the final large stockpile, and the line connecting the blanking point with the end point of the previous stockpile layer I2 and the top side edge of the stockpile layer I2 (or sliding guide rail) vertically, move the machine body 11 along the sliding guide rail for stockpiling, and form the third stockpiling layer I2. A trench I3 with a V-shaped longitudinal section is formed between two adjacent stacking layers I2. The intersection line at the bottom of the trench I3 is parallel to the top side edge of the stacking layer I2, and the two stacking layers I2 intersect without overlapping.

Step 2: First, the cantilever 12 of the stacker 1 rotates at a set angle so that the material drop point is located at one end of one of the ditch I3; then, the machine body 11 moves along the sliding guide rail so that the cantilever 12 moves along its direction in the ditch I3. Reciprocate in the length direction for stacking, forming a stacking layer II4 with the same weight, volume and length as the stacking layer I2; finally, the same method is used to make the material drop point at one end of another ditch I3, in the ditch I3 Move back and forth along its length for stockpiling, forming another stockpiling layer II4. A trench II5 with a W-shaped longitudinal section is formed between the above two stockpiling layers II4 and the two adjacent stockpiling layers I2.

Step 3: The cantilever 12 of the stacker 1 is rotated at a set angle, so that the material dropping point is the end point of the corresponding stacking layer II4, and the material is stacked along its length in the corresponding ditch II5, finally forming two stacking layers Layer I2 is a stacking layer III6 of equal weight, volume and length, so that the two sides of each stacking layer III6 intersect with the top side edges of two adjacent stacking layers I2. A trench III7 with a V-shaped longitudinal section is formed between the two stockpiling layers III6.

Step 4: According to the method of step 2, continue to adjust the angle of the cantilever 12, so that the material drop point is located at one end of the ditch III7, and reciprocate in the ditch I3 along its length to stack materials, forming a layer of the same weight as the stacking layer I2, A stockpile layer IV8 of equal volume and length, and a trench IV9 with a W-shaped longitudinal section is formed between the stockpile layer IV8 and the two stockpile layers III6.

Step 5: According to the method in step 3, continue to adjust the angle of the cantilever 12, so that the material dropping point is the end point of the stockpiling layer IV8, and the material is piled along its length in the stockpiling layer IV8, finally forming two layers with the stockpiling layer I2 The stockpile layer V10 of equal weight, volume and length makes the two sides of the stockpile layer V10 intersect with the top side edges of the two stockpile layers III6, forming a large stockpile with a triangular longitudinal section.

To sum up, the present invention blocks large-grained materials in the middle of the large pile by changing the accumulation process and accumulation form of the large-scale mixing pile, preventing the large-grained materials from naturally rolling down to the corner of the pile and reducing the impact of particle size segregation on the large-scale mixing pile.

The above is just to illustrate some principles of the present invention. This description is not intended to limit the present invention to the specific structure and scope of application shown. Therefore, all corresponding modifications and equivalents that may be used are Belong to the scope of the patent applied for by the present invention.

Claims (10)

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

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.

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.

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