CN205061902U - Mechanism sand production system - Google Patents

Abstract

The utility model provides a mechanism sand production system, including the hopper, still including the ball mill of the material that is used for milling, will material transfer to the connecting band of ball mill in the hopper for the whitewashed machine of high efficiency selection of screening ball mill gained material with the extremely high -efficient lifting machine that selects the powder machine of the ejection of compact conveying of ball mill, is used for the high -efficient machine -processed sand storage that selects the quick -witted ejection of compact of powder of receipt. The beneficial effects of the utility model reside in that can make the controllable machine -processed sand of fineness modulus, the proportion of big or small steel ball and the volume of advancing the mill of rubble granule in grinding through the adjustment promptly can reach the purpose of the grading of the machine -processed sand of adjustment, and that gos back the high -efficient selection powder machine of accessible adjustment spills the charging tray rotational speed, obtain ideal grain grading's machine -processed sand and limestone flour, have effectively solved the grain grading and the uncontrollable problem of dust content of machine -processed sand among the prior art.

Description

Machine-made sand production system

technical field

The utility model belongs to the technical field of machine-made sand production, in particular to a machine-made sand production system.

Background technique

Sand plays an important role in filling the voids of coarse aggregate in concrete and improving the workability of concrete. Commonly used sand includes natural river sand, artificial gravel machine-made sand, artificial pebble machine-made sand, etc. The traditional river sand for production is excavated from various river channels. Due to the excessive exploitation of a large number of river channels, the speed of flood discharge in the river channel is affected, and the ecological environment of the area is damaged. Serious damage to Hanoi's water quality and other hazards. Therefore, the state clearly stipulates that except for a small number of rivers where river sand is allowed to be re-mined, the rest are not allowed to be mined. Therefore, there is a serious shortage of this resource, which causes the cost of sand used in concrete to rise continuously and the material is hard to find. Therefore, according to the requirements of the "Technical Standard for Ready-Mixed Sand Concrete DBJ/T50-099-2010", all sand-making companies or concrete companies are turning their attention to using crushed stones to produce particles with a similar particle shape to the river sand instead of the river sand. , that is, machine-made sand. According to the standard of "GB/T14684-2011 Sand for Construction", machine-made sand is defined as "rock, mine tailings or industrial waste particles with a particle size of less than 4.75mm after soil removal treatment, made by mechanical crushing and screening. , but does not include soft, weathered particles, commonly known as artificial sand".

The preparation of machine-made sand in the prior art includes crushing the stone seeds, and separating various particle-graded aggregates through the sieve holes in the vibrating screen machine to obtain large and small crushed stones, coarse and fine sand, and then sending the fine sand into special The fine sand is crushed again, and the powder with a particle size below 0.075mm is selected as limestone powder, and the part with a particle size above 0.075mm is machine-made sand. Although this manufacturing method reduces the generation of powder in the sand, its particle gradation is still unreasonable, and with the reduction of powder, the fineness modulus of the machine-made sand gradually increases, resulting in a mechanism with a higher fineness modulus. Sand is not conducive to application to concrete. During the use of this production method, the fineness of the machine-made sand (that is, the gradation at all levels) fluctuates greatly, and the powder content is also unstable. As a result, the sand rate and glue content of the concrete made of this machine-made sand are frequently adjusted. The quality of concrete fluctuates greatly, which in turn causes the workload of production quality control personnel to be large and the production efficiency to be low.

Utility model content

In view of the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a machine-made sand production system, which is used to solve the problems of uncontrollable particle gradation and dust content of the machine-made sand in the prior art.

In order to achieve the above purpose and other related purposes, the utility model provides a machine-made sand production system, which includes a hopper and a ball mill for grinding materials. The material in the hopper is transferred to the connecting belt of the ball mill, which is used to screen the high-efficiency powder separator for the materials obtained by the ball mill, and the discharge of the ball mill is transferred to the hoist of the high-efficiency powder separator, and is used to receive the output of the high-efficiency powder separator. Sand library.

Further, the air outlet of the high-efficiency powder separator is connected to a dust collector, and the air outlet of the dust collector is connected to a dust collection fan.

Further, the discharge port of the dust collector is connected with a fine dust collection storehouse.

Further, the air outlets of the ball mill and the hoist are connected to the air inlet of the high-efficiency classifier.

Preferably, the ball mill is a horizontal ball mill, and the structure of the horizontal ball mill is conducive to the ball milling of materials by the steel balls in the ball mill.

Preferably, the size of the ball mill is Ф2.2m×6.5m.

Preferably, the size of the ball mill is Ф1.8m×13m.

Preferably, the model of the high-efficiency powder separator is HES-30.

As mentioned above, the machine-made sand production system of the utility model has the following beneficial effects: Send stones with a particle size of ≤5mm into a ball mill equipped with steel balls, and through the grinding of steel balls with different diameters, the materials will pass through the high-efficiency The powder classifier selects the excess powder to obtain the machine-made sand and limestone powder with very ideal particle size distribution. The beneficial effect of the utility model is that the fineness modulus of the produced machine-made sand is controllable, that is, by adjusting the ratio of large and small steel balls in the ball mill and the grinding amount of stone particles, it is possible to adjust the grinding fineness of the sand. Purpose: The powder content in the machine-made sand can also be controlled by adjusting the speed of the spreading disc of the high-efficiency powder separator. The higher the speed, the more dust will be taken away by the airflow, the less the powder content in the machine-made sand, and the better the powder selection effect it is good. The content of machine-made sand powder screened by the high-efficiency powder separator is controlled within 7%, that is, the weight content of materials with a particle size of <0.15mm in the machine-made sand is less than 7%, and the screened materials with a particle size of <0.15mm pass through the dust collector Collect as limestone powder to obtain machine-made sand and limestone powder with ideal particle gradation, which effectively solves the problem of uncontrollable particle gradation and dust content of machine-made sand in the prior art. At the same time, limestone is produced through the production system of the utility model. Both machine-made sand and limestone powder can be used as concrete mixing raw materials, which effectively improves the utilization rate of limestone. The produced machine-made sand complies with the second-zone sand standard in the "Building Sand GB/T14684-2011" standard, and the gradation category is Class I. According to the classification of the fineness modulus, it belongs to the medium sand specification. Compared with using natural river sand as a raw material to prepare concrete, the cost of preparing concrete with the same strength using the machine-made sand prepared by the production system of the utility model is obviously reduced.

Description of drawings

Fig. 1 is a schematic structural view of the machine-made sand production system of the present invention.

Explanation of reference numbers:

1 hopper

2 ball mill

3 elevators

4 high-efficiency powder separator

5 dust collector

6 machine-made sand warehouse

7 Dust collection fine powder warehouse

8 Dust collection fan

detailed description

The implementation of the present utility model is illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

Fig. 1 shows the structural schematic diagram of the machine-made sand production system of the present invention, including a hopper 1, and also includes a ball mill 2 for grinding materials, and a connecting belt that transfers the materials in the hopper 1 to the ball mill 2, and is used for screening the ball mill 2. The high-efficiency powder separator 4 for materials, the discharge of the ball mill 2 is sent to the hoist 3 of the high-efficiency powder separator 4, and the machine-made sand warehouse 6 for receiving the discharge of the high-efficiency powder separator 4; the air outlet of the high-efficiency powder separator 4 A dust collector 5 is connected, and the air outlet of the dust collector 5 is connected with a dust collection fan 8; the discharge port of the dust collector 5 is connected with a dust collection fine powder storehouse 7; The air inlet of powder machine 4 links to each other. The ball mill 2 is a horizontal ball mill. The cylinder of the horizontal ball mill used in this embodiment has a diameter of 1.8 m and a length of 13 m. The supplier of the high-efficiency powder separator 4 is Shangrao Machinery Factory, and the model is HES-30.

The operation process of the machine-made sand production system of the utility model is as follows: the loader puts the stones with a particle size ≤ 5mm obtained by upstream pretreatment into the hopper 1, and the materials in the hopper 1 are sent into the ball mill 2 through the conveyor belt, and the ball mill 2 is horizontal. Ball mill, the cylinder of the horizontal ball mill used in this embodiment has a diameter of 1.8m and a length of 13m. The steel balls inside the ball mill 2 mill the stone, and the material fineness modulus at the outlet of the ball mill is 2.2 to 2.6. Enter the elevator 3 through the screen at the outlet of the ball mill 2, and the elevator 3 sends the material into the high-efficiency powder separator 4. The supplier of the high-efficiency powder separator 4 in this embodiment is Shangrao Machinery Factory, model HES-30, a high-efficiency powder separator The rotating shaft inside 4 drives the spreading disc to rotate and scatter the material. The rotating speed of the rotating shaft is 250-400r/min. The material is selected by winnowing, and the material with a particle size of ≥0.15mm is screened out, and the material enters the machine-made sand through the discharge port under the action of gravity. Storehouse 6, which is the machine-made sand with ideal gradation; the air outlet of the high-efficiency powder separator 4 is connected to the dust collector 5 through the ventilation pipe, and the materials with a particle size of less than 0.15mm in the high-efficiency powder separator 4 enter the collector under the action of airflow The dust collector 5, the dust collector 5 separates the fine powder material with a particle diameter of <0.15mm from the gas, and the fine powder material enters the dust collection fine powder storehouse 7 through the discharge port of the dust collector 5, which is limestone powder, and can also be used as Mixing raw materials for concrete. The clean air of the dust collector 5 is discharged into the atmosphere after being reprocessed by the dust collecting fan 8, which contains almost no dust and has no pollution to the environment.

Wherein, the air outlets of the ball mill 2 and the elevator 3 are connected to the air inlet of the high-efficiency powder separator 4 through the ventilation pipe, so that the dust-containing gas in the ball mill 2 and the elevator 3 enters the high-efficiency powder separator 4 for screening, and realizes that the ball mill 2. While the hoist 3 exhausts air, it also recovers the dust in the airflow.

The method for producing machine-made sand in the machine-made sand production system of the present invention comprises the following steps:

(1) Feed crushing: First, the stone is crushed into particles with a particle size of ≤5mm by a stone crusher, and then the stone is ball milled. The equipment for ball milling is a ball mill, preferably a horizontal ball mill, and the diameter of the cylinder is 1.8m. , The length is 13m, the feed rate is 100T/h, there are 80mm diameter steel balls and 90mm diameter steel balls in the ball mill, the total weight of the steel balls is fixed at 22.8T, the total weight of the 80mm diameter steel balls and the total weight of the 90mm steel balls The ratio is 11:9, that is, 80mm diameter steel balls account for 55% of the total weight of steel balls in the ball mill, and 90mm diameter steel balls account for 45% of the total weight of steel balls in the ball mill;

(2) Screening and discharging: the crushed material is screened to obtain the machine-made sand. Materials are screened using a high-efficiency powder separator. The feed rate of the high-efficiency powder separator can be adjusted between 90-150T/h. , to avoid the material entering the high-efficiency powder separator from the ball mill to stay at the entrance, the actual feed amount of the high-efficiency powder separator is consistent with the feed amount of the ball mill, preferably 100T/h, the power of the high-efficiency powder separator adopted in this embodiment It is 18kw, the supplier is Shangrao Machinery Factory, model HES-30, the speed of the shaft of the high-efficiency powder separator is set to 400r/min, and the classification device inside the high-efficiency powder separator forms a graded airflow during operation, and the distribution of the graded airflow is reasonable. And the grading room is larger. After the material enters the powder separator, the rotating shaft drives the spreading disc to rotate and scatter the material, and classifies and screens the material. The scattered material is selected by wind, and the material with a particle size of ≥0.15mm is more affected by gravity than the wind force. It is discharged from the discharge port as machine-made sand; the material with a particle size of <0.15mm is affected by the wind force greater than gravity, and enters the dust collector with the airflow and is collected as limestone powder. It is 10T/h. The powder content of the machine-made sand screened by the high-efficiency powder separator is less than 7%, that is, the weight content of materials with a particle size of <0.15mm in the machine-made sand is less than 7%. The fineness of the machine-made sand produced by the production system of the utility model fully satisfies the second-zone sand standard in the "Building Sand GB/T14684-2011" standard (see Table 1 below), and the gradation category is Class I. The following table 1 is a statistical table of particle gradation parameters of the machine-made sand produced by the existing shaping process and the machine-made sand produced by the production method of the utility model. The specific preparation method referred to in the existing shaping process is: after the flakes collected from the mine are crushed, they are transported to the screening system with a belt, and the materials with a particle size below 5 mm are screened out through a 5 mm sieve, which is the existing Machine-made sand made by advanced shaping process.

Table 1

As can be clearly seen from the above table 1, the particle size in the machine-made sand prepared by the utility model is 0.075mm and the particles at the bottom of the sieve are obviously reduced. Particles with a particle size below 0.15 mm are used as limestone powder, which can be added to concrete as raw materials according to the workability requirements of concrete. Automatic continuous sampling points can also be installed in the production system of the utility model to detect the produced products on time, and judge whether the quality meets the grading requirements according to the detection results, so as to monitor and flexibly adjust the quality of the produced machine-made sand at any time The purpose is to ensure that the quality of concrete products produced by using the machine-made sand is stable. The specifications of machine-made sand are divided into coarse sand, medium sand and fine sand according to the fineness modulus. The number is 2.5, which belongs to the medium sand specification.

Cost comparison:

The following table 2 is a comparison table of raw material consumption and cost of the C30 ready-mixed machine-made sand concrete prepared by using river sand as raw material and using the medium sand of the present invention as raw material.

Table 2

In the above table 2, the unit of each raw material used in the preparation of concrete is kg/m ³ , wherein the ultra-fine sand is the river sand, and the medium sand is the machine-made sand produced by the production system of the utility model. It can be seen from the above table 2 that, on the same material price, using the machine-made sand prepared by the utility model to prepare concrete not only effectively utilizes limestone resources, but also reduces the unilateral cost price of concrete. The performance of the concrete made by the utility model machine-made sand is similar, and the slump/expansion of the two is very close, which fully meets the needs of construction.

Example 2

The machine-made sand production system of this embodiment is the same as that of Embodiment 1. The ball mill 2 is a horizontal ball mill. The cylinder of the horizontal ball mill used in this embodiment has a diameter of 2.2 m and a length of 6.5 m. The supplier of the high-efficiency powder separator 4 For Shangrao Machinery Factory, the model is HES-30.

The operation process of the machine-made sand production system of the utility model is as follows: the loader puts the stones with a particle size ≤ 5mm obtained by upstream pretreatment into the hopper 1, and the materials in the hopper 1 are sent into the ball mill 2 through the conveyor belt, and the ball mill 2 is horizontal. Ball mill, the diameter of the cylinder is 2.2m, the length is 6.5m, the steel ball inside the ball mill 2 ball mills the stone, the material fineness modulus of the discharge port of the ball mill is 2.2-2.6, and the material passes through the screen at the outlet of the ball mill 2 Enter the hoist 3, the hoist 3 sends the material into the high-efficiency powder separator 4, the high-efficiency powder separator 4 screens out the material with a particle size ≥ 0.15mm, and the material enters the machine-made sand storage 6 through the discharge port, which is the ideal gradation The air outlet of the high-efficiency powder separator 4 is connected to the dust collector 5 through the ventilation pipe. The feed port enters the dust collection fine powder storehouse 7, which is limestone powder and can also be used as a blending raw material for concrete. The clean air of the dust collector 5 is discharged into the atmosphere after being reprocessed by the dust collecting fan 8, which contains almost no dust and has no pollution to the environment.

Wherein, the air outlets of the ball mill 2 and the elevator 3 are connected to the air inlet of the high-efficiency powder separator 4 through the ventilation pipe, so that the dust-containing gas in the ball mill 2 and the elevator 3 enters the high-efficiency powder separator 4 for screening, and realizes that the ball mill 2. While the hoist 3 exhausts air, it also recovers the dust in the airflow.

The method for producing machine-made sand in the machine-made sand production system of the present invention comprises the following steps:

(1) Feed crushing: first crush the stone into particles with a particle size ≤ 5mm through a stone crusher, and then perform ball milling on the stone. The equipment for ball milling is a ball mill, preferably a horizontal ball mill, with a cylinder diameter of 2.2m , the length is 6.5m, the feed rate is 100T/h, there are 80mm diameter steel balls and 90mm diameter steel balls in the ball mill, the total weight of the steel balls is fixed at 22.8T, the total weight of the 80mm diameter steel balls and the total weight of the 90mm steel balls The weight ratio is 1:1, that is, steel balls with a diameter of 80mm account for 50% of the total weight of steel balls in the ball mill, and steel balls with a diameter of 90mm account for 50% of the total weight of steel balls in the ball mill.

(2) Screening and discharging: the crushed material is screened to obtain the machine-made sand. Materials are screened using a high-efficiency powder separator. The feed rate of the high-efficiency powder separator can be adjusted between 90-150T/h. , to avoid the material entering the high-efficiency powder separator from the ball mill to stay at the entrance, the actual feed amount of the high-efficiency powder separator is consistent with the feed amount of the ball mill, preferably 100T/h, the power of the high-efficiency powder separator adopted in this embodiment It is 18kw, the supplier is Shangrao Machinery Factory, model HES-30, the speed of the shaft of the high-efficiency powder separator is set to 320r/min, the classification device inside the high-efficiency powder separator forms a graded airflow during operation, and the distribution of the graded airflow is reasonable. And the grading room is larger. After the material enters the powder separator, the rotating shaft drives the spreading disc to rotate and scatter the material, and classifies and screens the material. The scattered material is selected by wind, and the material with a particle size of ≥0.15mm is more affected by gravity than the wind force. It is discharged from the discharge port as machine-made sand; the material with a particle size of <0.15mm is affected by the wind force greater than gravity, and enters the dust collector with the airflow and is collected as limestone powder. It is 8T/h. The powder content of the machine-made sand screened by the high-efficiency powder separator is less than 7%, that is, the weight content of materials with a particle size of <0.15mm in the machine-made sand is less than 7%.

Example 3

The machine-made sand production system of this embodiment is the same as that of Embodiment 1. The ball mill 2 is a horizontal ball mill. The cylinder of the horizontal ball mill used in this embodiment has a diameter of 1.8 m and a length of 13 m. The supplier of the high-efficiency powder separator 4 is Shangrao Machinery Factory, the model is HES-30.

The operation process of the machine-made sand production system of the utility model is as follows: the loader puts the stones with a particle size ≤ 5mm obtained by upstream pretreatment into the hopper 1, and the materials in the hopper 1 are sent into the ball mill 2 through the conveyor belt, and the ball mill 2 is horizontal. Ball mill with a diameter of 1.8m and a length of 13m. The steel balls inside the ball mill 2 mill the stones. The fineness modulus of the material at the outlet of the ball mill is 2.2-2.6. The material passes through the screen at the outlet of the ball mill 2 to enter the lifting The machine 3 and the elevator 3 send the material into the high-efficiency powder separator 4, and the high-efficiency powder separator 4 screens out the material with a particle size ≥ 0.15mm, and the material enters the machine-made sand storehouse 6 through the discharge port, which is the mechanism of ideal grading Sand; the air outlet of the high-efficiency powder separator 4 is connected to the dust collector 5 through the ventilation pipe, and the dust collector 5 separates the fine powder material with a particle size of <0.15mm from the gas, and the fine powder material passes through the outlet of the dust collector 5 Enter dust collection fine powder storehouse 7, be limestone powder, also can be used as the blending raw material of concrete. The clean air of the dust collector 5 is discharged into the atmosphere after being reprocessed by the dust collecting fan 8, which contains almost no dust and has no pollution to the environment.

Wherein, the air outlets of the ball mill 2 and the elevator 3 are connected to the air inlet of the high-efficiency powder separator 4 through the ventilation pipe, so that the dust-containing gas in the ball mill 2 and the elevator 3 enters the high-efficiency powder separator 4 for screening, and realizes that the ball mill 2. While the hoist 3 exhausts air, it also recovers the dust in the airflow.

The method for producing machine-made sand in the machine-made sand production system of the present invention comprises the following steps:

(1) Feed crushing: First, the stone is crushed into particles with a particle size of ≤5mm by a stone crusher, and then the stone is ball milled. The equipment for ball milling is a ball mill, preferably a horizontal ball mill, and the diameter of the cylinder is 1.8m. , The length is 13m, the feed rate is 100T/h, there are 80mm diameter steel balls and 90mm diameter steel balls in the ball mill, the total weight of the steel balls is fixed at 22.8T, the total weight of the 80mm diameter steel balls and the total weight of the 90mm steel balls The ratio is 2:3, that is, 80mm diameter steel balls account for 40% of the total weight of steel balls in the ball mill, and 90mm diameter steel balls account for 60% of the total weight of steel balls in the ball mill.

(2) Screening and discharging: the crushed material is screened to obtain the machine-made sand. Materials are screened using a high-efficiency powder separator. The feed rate of the high-efficiency powder separator can be adjusted between 90-150T/h. , to avoid the material entering the high-efficiency powder separator from the ball mill to stay at the entrance, the actual feed amount of the high-efficiency powder separator is consistent with the feed amount of the ball mill, preferably 100T/h, the power of the high-efficiency powder separator adopted in this embodiment It is 18kw, the supplier is Shangrao Machinery Factory, model HES-30, the speed of the shaft of the high-efficiency powder separator is set to 250r/min, and the classification device inside the high-efficiency powder separator forms a graded airflow during operation, and the distribution of the graded airflow is reasonable. And the grading room is larger. After the material enters the powder separator, the rotating shaft drives the spreading disc to rotate and scatter the material, and classifies and screens the material. The scattered material is selected by wind, and the material with a particle size ≥ 0.15mm is more affected by gravity than the wind force. It is discharged from the discharge port as machine-made sand; the material with a particle size of <0.15mm is affected by the wind force greater than gravity, and enters the dust collector with the airflow and is collected as limestone powder. It is 6T/h. The powder content of the machine-made sand screened by the high-efficiency powder separator is less than 7%, that is, the weight content of materials with a particle size of <0.15mm in the machine-made sand is less than 7%.

The above-mentioned embodiments only illustrate the principles and effects of the present utility model, but are not intended to limit the present utility model. Anyone familiar with this technology can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the utility model should still be covered by the claims of the utility model.

Claims (8)

1. a Machine-made Sand production system, include hopper (1), it is characterized in that: also comprise the ball mill (2) for material of milling, material in described hopper (1) is sent to the connecting band of ball mill (2), for screening the high-efficient powder concentrator (4) of ball mill (2) gained material, the discharging of ball mill (2) is sent to the lift (3) of high-efficient powder concentrator (4), for receiving the machine-processed sand storage (6) of high-efficient powder concentrator (4) discharging.

2. Machine-made Sand production system according to claim 1, it is characterized in that: the air outlet of described high-efficient powder concentrator (4) is connected with dust-precipitator (5), the air outlet of described dust-precipitator (5) is connected with dust collecting fan (8).

3. Machine-made Sand production system according to claim 2, is characterized in that: the discharge port of described dust-precipitator (5) is connected with fine powder storehouse (7) of gathering dust.

4. Machine-made Sand production system according to claim 1, is characterized in that: the air outlet of described ball mill (2), lift (3) is connected with the inlet mouth of described high-efficient powder concentrator (4).

5. Machine-made Sand production system according to claim 1, is characterized in that: described ball mill (2) is horizontal ball mill.

6. Machine-made Sand production system according to claim 1, is characterized in that: described ball mill (2) is of a size of Ф 2.2m × 6.5m.

7. Machine-made Sand production system according to claim 1, is characterized in that: described ball mill (2) is of a size of Ф 1.8m × 13m.

8. Machine-made Sand production system according to claim 1, is characterized in that: the model of described high-efficient powder concentrator (4) is HES-30.