CN110064502B

CN110064502B - Multi-stage quartz sand sorting method

Info

Publication number: CN110064502B
Application number: CN201910364061.9A
Authority: CN
Inventors: 熊帆; 赵辉; 王德春; 李曙光
Original assignee: Changjiang Moulding Materials Group Kezuo Houqi Co ltd
Current assignee: Changjiang Moulding Materials Group Kezuo Houqi Co ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2022-06-07
Anticipated expiration: 2039-04-30
Also published as: CN110064502A

Abstract

The invention relates to the technical field of quartz sand processing, and discloses a multi-stage quartz sand sorting method, which comprises the following stepsA. Preparing equipment, namely preparing a sorting box, and installing a partition plate in the sorting box, wherein the partition plate divides the sorting box into at least two parallel sorting cavities, and the height of the partition plate is 1/2-3/4 of the height of the sorting box; step B, introducing clean water into each sorting cavity, and introducing the clean water into each sorting cavity at the same time, wherein the water flow direction of the clean water faces upwards; c, introducing a sand-water mixture, and mixing quartz sand particles and clear water to form the sand-water mixture; when the water level in the separation box is flush with the top of the partition plate with the lowest height, the sand-water mixture is mixed at 100M³/H～300M³The flow of the/H is introduced into the separation box from the side wall of the separation box; and D, finishing sorting, and discharging and collecting the quartz sand particles in the sorting cavity after sorting. The invention can carry out multi-stage separation on the quartz sand.

Description

Multi-stage quartz sand sorting method

Technical Field

The invention relates to the technical field of quartz sand processing, in particular to a multi-stage quartz sand sorting method.

Background

At present, the domestic production process of the quartz sand mainly comprises the following steps: the method comprises the following steps of mining, crushing, cleaning, drying, sorting and the like, wherein the sorting is generally carried out by adopting a vibration screening machine, a plurality of layers of screening plates are arranged in the vibration screening machine, namely, each layer of screening plate is screened according to the set granularity to obtain quartz sand with different granularities (meshes), but the screening mode has many problems, namely, the granularity of the firstly sorted quartz sand is not uniform, and some fine particles are easy to mix in larger sand grains, so that the granularity distribution of finished sand products cannot reach the standard due to different meshes of the screened standard sand; secondly, during the working process of the vibrating screen machine, a large amount of dust is generated due to the impact between sand grains or between the sand grains and the screen plate, the main component silicon dioxide of the dust has great health threat to human bodies, if the vibrating screen is not tightly sealed, the dust can fly around in a production area, the separated sand grains need to be further cleaned, and finally, due to the fact that the sand grains continuously impact the screen plate of the vibrating screen during the separation process, the durability of the screen plate is reduced, and the screen plate needs to be replaced after being used for a period of time. Therefore, the method of adopting the vibration screening is only suitable for the production of small batches.

In the conventional process flow of the quartz sand, the crushed sand needs to be cleaned and dried before separation, so that the production process is longer and is not suitable for enterprises with larger quartz sand yield.

Disclosure of Invention

The invention aims to provide a multi-stage quartz sand sorting method for carrying out multi-stage sorting on quartz sand.

In order to achieve the purpose, the invention provides the following technical scheme: a multi-stage quartz sand sorting method comprises the following steps:

step A, preparing equipment

Preparing a sorting box, and arranging a partition plate in the sorting box, wherein the partition plate divides the sorting box into at least two sorting cavities which are arranged in parallel, and the height of the partition plate is 1/2-3/4 of the height of the sorting box;

step B, introducing clean water

Simultaneously introducing clean water into each sorting cavity, wherein the water flow direction of the clean water faces upwards;

step C, introducing a sand-water mixture

Mixing quartz sand particles with clear water to form a sand-water mixture; when the water level in the separation box is flush with the top of the partition plate with the lowest height, the sand-water mixture is mixed at 100M³/H～300M³The flow of the/H flows into the separation box from the side wall of the separation box

Step D, finishing the sorting

And after the separation is finished, discharging and collecting the quartz sand particles in the separation cavity.

The principle and the beneficial effects of the invention are as follows:

1. because rivers can receive blockking of baffle when a plurality of sorting intracavity flow to reduce the velocity of flow of rivers horizontal direction, and the height of baffle is higher, and the influence reduction effect to the velocity of flow of rivers is more obvious. The height of the partition plate in the step A is 1/2-3/4 of the height of the separation box, the partition plate is prevented from being too low in height, the separation effect caused by the fact that water flow can easily cross the partition plate is poor, the height of the partition plate is also prevented from being too high, the flow velocity of the water flow is too large in the separation cavity, and quartz sand particles are difficult to drive to overturn the partition plate.

2. In the step B, the range of the upward acting force generated when the clean water is introduced into the sorting cavity is determined, the acting force in the vertical direction of the quartz sand in the sorting cavity comprises self gravity, buoyancy and upward water power, and the gravity and the buoyancy are difficult to change artificially, so that the downward settling rate of the quartz sand particles in the sorting cavity can be controlled by controlling the upward water power.

If the vertical acting force provided by the clean water is not available in the scheme, the stress of the sand grains in the vertical direction is fixed, and if the sand grains with the grain size a are settled in the second sorting cavity close to the sand inlet under the condition that the stress of the sand grains with the grain size a in the vertical direction is fixed, the sand grains with the grain size a are also subjected to upward impact force under the upward action of the clean water, so that the sand grains with the grain size a can be possibly deposited in the third or fourth sorting cavities close to the sand inlet, and therefore the quartz sand raw material can be very finely sorted to obtain the sand grains with higher grain size distribution. Through the principle, can screen the quartz sand granule of different granularities to reach the purpose of multistage separation quartz sand granule, compare with traditional screen cloth, can grade the quartz sand granule of different granularities.

3. In the step C, carry the sand-water mixture to the separation box in through rivers effect, compare and directly use the conveyer belt to convey the quartz sand to the separation box in, utilize rivers effect to carry quartz sand in this application, can reduce the kinetic energy that the quartz sand enters into the separation box, avoid the initial kinetic energy of quartz sand to influence the separation effect. If sand particles impact on the side wall of the separation box, mud powder attached to the sand particles can further fall off in the collision process, and the quartz sand is in water, so that the condition of flying dust is avoided, and the processing environment is greatly improved.

Further, the partition plate in the step A is detachably connected with the sorting box. Through the mode of can dismantling the connection, be convenient for change the baffle of co-altitude not.

Furthermore, in the step B, the flow rate of the clear water is 1T/H-100T/H. The flow rate of the clear water is in the range of 1T/H-100T/H, and the quartz sand particles with 5 meshes-270 meshes can be sorted out.

Further, in the step B, clean water is introduced from the bottom of the separation box through a water supply pipe, and the upper end of the water supply pipe is higher than the bottom wall of the separation box. Compared with the method that the clean water is introduced from the side wall of the separation cavity, in order to enable the clean water to have an upward water flow direction, the side wall of the separation cavity is required to be provided with an inclined hole for introducing the clean water, and the inclined hole is difficult to process; and clear water is introduced from the bottom of the separation cavity, and the clear water is only required to be introduced upwards, so that the separation cavity is more convenient.

Further, in the step C, the sand-water ratio of the sand-water mixture is not more than 50%. The larger the proportion of the sand-water mixture is, the more the content of the quartz sand is, the more the amount of the quartz sand in the sorting box is, and the more the sorted quartz sand is.

Further, a water spray disk is provided on the upper portion of the water supply pipe. The water spray disk can prevent quartz sand particles from entering the water supply pipe, so that the probability of blockage of the water supply pipe is reduced.

Further, the bottom of separation box is provided with the joint groove. The division board stretches into in the fixed slot, and the division board is fixed on the mounting, so through the not division board of co-altitude of mounting fixation.

Further, a fixing piece is fixed on the sorting box, and a fixing groove is formed in the fixing piece. The division board stretches into the separation box through the joint groove and fixes, reduces the setting of mounting.

Furthermore, rubber strips are fixed on one side of the partition board close to the sorting box. The rubber strip can prevent the quartz sand from entering a gap between the separation box and the separation plate.

Further, the pipe diameter of the water supply pipe is 10 cm-30 cm. The pipe diameter of the water supply pipe is 10 cm-30 cm, the outflow amount of the water supply pipe with the pipe diameter smaller than 10cm is not enough, more water supply pipes need to be arranged, and the space of the sorting cavity occupied by the pipeline with the pipe diameter larger than 30cm is too large.

Drawings

FIG. 1 is a schematic structural diagram of embodiments 1 to 13 of the present invention;

fig. 2 is a schematic structural diagram of this embodiment 14.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the sand cleaning device comprises a separation box 1, a separation cavity 2, a sand inlet 3, a partition plate 4, a sand discharge port 5, a header pipe 6, a water supply pipe 7, a water spray disk 8 and a sand cleaning pipe 11.

A multistage method for classifying quartz sand, wherein parameters involved in examples 1 to 13 are shown in table 1:

TABLE 1

In the following, example 1 is taken as an example to illustrate a method for sorting quartz sand according to the present invention, and a sorting box 1 is used, as shown in fig. 1, a sand inlet 3 for sand-water mixture is provided on the right side of the sorting box 1, and a sand outlet is provided on the left side of the sorting box 1. A plurality of clapboards 4 are detachably connected in the sorting box 1, and one clapboard 4 divides the sorting box 1 into two sorting cavities 2 in the embodiment. Be provided with the joint groove on specific sorting box 1, baffle 4 inserts the joint inslot and can dismantle with sorting box 1 and be connected, can also set up the mounting at sorting box 1's middle part, the mounting is the fixed block, set up the fixed slot on the fixed block, baffle 4 inserts the fixed slot and can dismantle with sorting box 1 and be connected, in this embodiment in order to practice thrift sorting box 1's space, select for use to set up the joint groove on sorting box 1, baffle 4 inserts the joint groove and can dismantle with sorting box 1 and be connected, baffle 4 all is provided with the rubber strip with one side of sorting box 1 contact, when baffle 4 extrudees with sorting box 1, the rubber strip takes place to warp and seals baffle 4 and sorting box 1's clearance. The bottom center department of selecting separately chamber 2 is equipped with row's sand mouth 5 that can open and close, selects separately 2 bottoms in chamber be equipped with 1 horizontal sliding connection of separation box and can shelter from row's sand mouth 5's bottom plate, the bottom of selecting separately chamber 2 all is equipped with the water conservancy diversion portion that is the back taper.

Be provided with a plurality of perpendicular ascending delivery pipes 7 on the separation box 1, the diameter of all delivery pipes 7 is unanimous, and delivery pipe 7 diameter is 20cm in this embodiment, and delivery pipe 7 runs through water conservancy diversion portion and extends to in selecting separately chamber 2, and many delivery pipes 7 use row sand mouth 5 as the centre of a circle along water conservancy diversion portion circumference equipartition, and the upper end parallel and level of many delivery pipes 7. The lower ends of a plurality of water supply pipes 7 in the separation cavity 2 are communicated with a header pipe 6, the header pipe 6 is communicated with a water pump, adjustable valves are arranged on the water supply pipes 7, and the valves are located on the water supply pipes 7 outside the separation box 1. The upper ends of the water supply pipes 7 are fixed with water spray disks 8.

The method comprises the following steps:

step A, preparing equipment

In this embodiment, a sorting box 1 having a length of 6.4m, a width of 1.5m, and a height of 1.5m is prepared, and a partition plate 4 is installed in the sorting box 1, the sorting box 1 is divided into two parallel sorting chambers 2 by the partition plate 4, and the height of each partition plate 4 is 0.75 m. If the partition plate 4 needs to be replaced, the partition plate 4 is drawn out from the clamping groove, and the partition plates 4 with other heights are replaced.

Step B, introducing clean water

And simultaneously introducing clean water into each sorting cavity 2, wherein the water flow direction of the clean water faces upwards, and the flow of the clean water is regulated to 1T/H by regulating a valve.

Step C, introducing a sand-water mixture

The quartz sand particles and the clear water mixture are mixed to form a sand-water mixture, the content of the quartz sand is 11.2%, and the mixing mode can adopt a conventional mixing mode, such as an existing concrete mixer, and the details are not repeated. As shown in figure 1, the sand-water mixture is fed into the separation box 1 from the sand inlet 3 at a flow rate of 100M3/H, when the sand-water mixture enters the first separation cavity 2 on the right side from the sand inlet 3, the sand-water mixture is dispersed by the action of water flow, meanwhile, the water supply pipe 7 continuously supplies water, and the water flow sprayed out through the water spraying holes has upward component force, so that the sedimentation velocity of the quartz sand particles in the separation box 1 can be reduced. The sand grains with the largest particle size settle to the bottom of the separation box 1 under the action of upward water force (acting force in the vertical direction) of the water spray holes, and the sand grains with the rest particle sizes pass through the first partition plate 4 on the right side along with the action of water flow (acting force in the horizontal direction) of the initially entering sand-water mixture and enter the second separation cavity 2 on the right side. The sorting principle of the quartz sand particles in the second sorting chamber 2 on the right side is the same as that of the first sorting chamber 2 on the right side.

Step D, finishing sorting

Example 14:

the difference from the embodiment 1, as shown in fig. 2, is only the structure of the water spray disk 8 used in the step B. Specifically, the water spray disk 8 rotates to be connected on the delivery pipe, and the hole for water spraying on same water spray disk 8 all sets up along the same direction slope of water cavity circumference, and rivers receive the thrust of rivers anticlockwise (or anticlockwise) direction when water cavity is followed each hole for water spraying exhaust to take place to rotate. Be equipped with the sand cleaning hole in 8 bottoms of spray disk, for the reposition of redundant personnel that reduce the sand cleaning hole, the sand cleaning hole only is equipped with one in this embodiment, has sand cleaning pipe 11 in sand cleaning hole department bonding, and sand cleaning pipe 11 is the rubber tube in this embodiment, and sand cleaning pipe 11's export is towards the root of delivery pipe.

Because the bottom in each separation chamber all sets up to carry out the toper of water conservancy diversion to sand grain, consequently the sand grain can flow along the bottom in separation chamber and discharge from the sand discharge port, and this in-process, partial sand grain can pile up the root at the delivery pipe for this part sand grain can't be discharged, consequently sets up sand cleaning hole in the bottom in water cavity, and the sand cleaning hole discharge can be followed to partial clear water in the water cavity, thereby is used in the root of delivery pipe, washes away the sand grain of this department. Thus, the clean water discharged from the sand cleaning hole through the sand cleaning pipe 11 can directly wash the root of the water supply pipe, and the sand accumulated at the root of the water supply pipe is washed away.

After sorting is completed, the bottom plate slides out of the sand discharge port 5, the sand discharge port 5 is opened, quartz sand particles in the two sorting cavities 2 are discharged and collected, and the quartz sand particles discharged from the sand outlet are collected.

The particle sizes of the quartz sand particles collected from the first sorting chamber on the right, the quartz sand collected from the second sorting chamber on the right and the quartz sand particles collected from the sand outlet (average particle size of 5 measurements, rounded up) are respectively detected by a particle size detector, as shown in table 2:

TABLE 2

As can be seen from tables 1 and 2, in examples 1 to 3, the ratio of the sand-water mixture is changed, which has little influence on the particle sizes of the quartz sand particles in the two sorting chambers 2 and the quartz sand at the sand outlet, and in examples 4 to 6, the flow rates of the clean water injected into the two sorting chambers 2 are changed, that is, the vertical component force is changed, the flow rate of the clean water is gradually increased, and the particle sizes of the quartz sand particles sorted in the two sorting chambers 2 are gradually increased, so that the sorting of the quartz sand and the flow rate of the clean water have a large relationship.

In example 7 and example 8, the injection flow rate of the sand-water mixture is changed, that is, the component force in the horizontal direction is increased, the horizontal component force is increased, the quartz sand particles of the sand outlet are gradually increased, and the horizontal component force has a large influence on the particle size of the quartz sand of the sand outlet.

In examples 8 and 9, the injection amount of the sand-water mixture was increased, the flow rate of the clear water was increased, and the particle sizes of the silica sand particles in the classification box 1 and the sand outlet were increased. In summary, the sorting of the quartz sand particles is influenced by the horizontal component (the injection flow rate of the sand-water mixture) and the vertical component (the flow rate of the clean water injected into the sorting box 1).

In examples 10 to 13, the height of the partition plate was gradually increased, that is, the resistance to the horizontal component force (the injection flow rate of the sand-water mixture) was gradually increased, the horizontal component force was decreased, the particle size of the silica sand particles discharged from the sand outlet was gradually decreased, and the particle size of the silica sand in the two sorting chambers 2 was gradually increased. From the results of the classification in example 14, it can be seen that the change of the structure of the water spray disk 8 does not largely affect the particle size of the classification, but the change of the structure of the water spray disk 8 clearly shows the improvement of the accumulation of the sand particles at the bottom of the classification chamber when the sand particles are discharged, and the discharge of the sand particles is more convenient.

In summary, when a certain size of quartz sand particles is required, the height of the partition plate can be adjusted to change the resistance of the horizontal component force, and the injection amount of the sand-water mixture can be changed to change the horizontal component force and change the amount of clear water injected into the separation box to change the vertical component force, so as to achieve the purpose of screening out the quartz sand particles with the size.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make several variations and modifications without departing from the concept of the present invention, and these should be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent. The techniques, shapes, and structural parts, which are omitted from the description of the present invention, are all known techniques.

Claims

1. A multi-stage quartz sand sorting method is characterized in that: the method comprises the following steps:

step A, preparing equipment

Preparing a sorting box, and installing a partition plate in the sorting box, wherein the partition plate divides the sorting box into at least two parallel sorting cavities, and the height of the partition plate is 1/2-3/4 of the height of the sorting box; the bottom of the sorting cavity is provided with a flow guide part in an inverted cone shape;

step B, introducing clean water

Clean water is simultaneously introduced into each separation cavity through a water supply pipe with the upper end higher than the bottom wall of the separation box, the water flow direction of the clean water faces upwards, a water spray disc is rotatably connected onto the water supply pipe, a water cavity is arranged on the water spray disc, water spray holes are all obliquely arranged along the same direction of the circumference of the water cavity, sand cleaning holes are arranged at the bottom of the water spray disc, sand cleaning pipes are bonded at the sand cleaning holes, and the outlets of the sand cleaning pipes face the root of the water supply pipe;

step C, introducing a sand-water mixture

Mixing quartz sand particles with clear water to form a sand-water mixture; when the water level in the separation box is flush with the top of the partition plate with the lowest height, the sand-water mixture is mixed at 100M³/H～300M³The flow of the/H is introduced into the separation box from the side wall of the separation box;

step D, finishing the sorting

2. The multistage silica sand classification method according to claim 1, characterized in that: and the partition plate in the step A is detachably connected with the sorting box.

3. The multistage silica sand classification method according to claim 1, characterized in that: in the step B, the flow rate of the clear water is 1T/H-100T/H.

4. The multistage silica sand classification method according to claim 1, characterized in that: in the step C, the quartz sand content of the sand-water mixture is not more than 50%.

5. The multistage silica sand classification method according to claim 2, characterized in that: the bottom of separation box is provided with the joint groove, and the baffle inserts the joint inslot and can dismantle with the separation box and be connected.

6. The multistage silica sand classification method according to claim 2, characterized in that: the sorting box is fixed with a fixing piece, the fixing piece is provided with a fixing groove, and the partition board is inserted into the fixing groove and is detachably connected with the sorting box.

7. The multistage silica sand classifying method according to any one of claims 5 and 6, wherein: and rubber strips are fixed on one sides of the partition plates close to the sorting boxes.

8. The multistage silica sand classification method according to claim 7, characterized in that: the pipe diameter of the water supply pipe is 10 cm-30 cm.