CN108514847B - Method for improving raw material mixing efficiency based on optimization of glass material mixer - Google Patents

Method for improving raw material mixing efficiency based on optimization of glass material mixer Download PDF

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Publication number
CN108514847B
CN108514847B CN201810317021.4A CN201810317021A CN108514847B CN 108514847 B CN108514847 B CN 108514847B CN 201810317021 A CN201810317021 A CN 201810317021A CN 108514847 B CN108514847 B CN 108514847B
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China
Prior art keywords
mixer
channel
bin
materials
baffle
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CN108514847A (en
Inventor
吕在国
郑滔
叶华庭
王详成
许建国
黄俊波
胡魁亮
谢俊
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Hubei Sanxia New Building Materials Co ltd
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Hubei Sanxia New Building Materials Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
    • B01F13/00Other mixers; Mixing plant, including combinations of mixers, e.g. of dissimilar mixers
    • B01F13/10Mixing plant, including combinations of mixers, e.g. of dissimilar mixers
    • B01F13/1002Mixing plant, including combinations of mixers, e.g. of dissimilar mixers for granular material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
    • B01F15/00Accessories for mixers ; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F15/02Feed or discharge mechanisms
    • B01F15/0201Feed mechanisms
    • B01F15/0227Feed mechanisms characterized by the means for feeding the components to the mixer
    • B01F15/0234Feed mechanisms characterized by the means for feeding the components to the mixer using gravity, e.g. from a hopper
    • B01F15/0235Feed mechanisms characterized by the means for feeding the components to the mixer using gravity, e.g. from a hopper using a hopper

Abstract

The invention belongs to the technical field of glass manufacturing, discloses a method for improving raw material mixing efficiency based on optimization of a glass material mixer, and particularly relates to arrangement of baffles at the upper end and the lower end of a connecting channel of a middle bin and the mixer. According to the invention, the baffle is arranged at the upper end of the connecting channel between the intermediate bin and the mixer, so that on one hand, batch bonding materials in the intermediate bin can be prevented from entering the mixer; on the other hand, the friction between the discharged materials and the baffle and the channel wall can be increased, the segregation and layering phenomena among different materials are reduced, and the premixing effect is achieved; according to the invention, the baffle is arranged at the lower end of the connecting channel between the intermediate bin and the mixer, so that more materials can enter the mixing area of the mixer, and the splashing of the materials in the static area is reduced, thereby improving the working efficiency of the mixer.

Description

Method for improving raw material mixing efficiency based on optimization of glass material mixer
Technical Field
The invention belongs to the technical field of glass manufacturing, and relates to a method for improving raw material mixing efficiency based on optimization of a glass material mixer.
Background
Batch preparation is an important process in glass production, batch quality has a crucial influence on the quality and production of glass products, and the batch quality not only influences the melting capacity of a melting furnace and the service life of the melting furnace, but also influences the clarification process. Therefore, in the glass production, the quality of the batch is effectively controlled, the grade of the glass product can be improved, and the production can be stabilized. The mixing uniformity of the batch is one of the most important links in the preparation of the batch, and the mixing uniformity determines the stability of melting. If the mixing uniformity is poor, the local unevenness of the batch materials can be caused, local infusibility can be generated on melting, and the defects of sand, glass ribs and the like can be generated on the glass plate surface.
As the transition channel who connects middle storehouse and mix the machine, the upper end is connected with the middle storehouse discharge gate, and the lower extreme is connected with the mixer feed inlet, and to a great extent is influencing the homogeneity that the batch mixture mixes. On the one hand, the middle bin connected with the upper end is due to the segregation phenomenon of materials, and when the materials are unloaded in the bin, the air resistance of batch particles with different shapes, which are subjected to free falling movement under the action of gravity, is different, so that the batch materials are seriously layered. Meanwhile, in the middle bin, the influence of the pressure of the upper material and the pore water among the material particles is received, and the material particles are easy to form aggregated bonding materials, so that the later-period batch mixing is not facilitated. On the other hand, the motion trail of the stirring blade of the mixer connected with the lower end has a specific range, so that the mixer has a mixing blind area, and the materials in the blind area are in a static state, thereby greatly reducing the material mixing efficiency. Therefore, to obtain a high quality homogeneous batch must reduce batch delamination and reduce the mass of binder entering the mixer; simultaneously, the batch is ensured to enter a mixing area, and the splashing of the materials in a static area is reduced.
Disclosure of Invention
The invention aims to provide a method for improving the raw material mixing efficiency based on optimization of a glass material mixer, and aims to solve the problems that in the existing glass raw material mixer, the mixture of batch materials is not uniform, the melting tank materials are locally refractory, and sand and glass ribs are generated on a glass panel.
In order to realize the purpose, the invention provides a method for improving the mixing efficiency of raw materials based on optimizing a glass material mixer, firstly, a baffle is arranged at the upper end of a connecting channel between a middle bin and the mixer, so that batch binding materials in the middle bin can be reduced to enter the mixer; on the other hand, the friction between the discharged materials and the baffle and the channel wall can be increased, the segregation and layering phenomena among different materials are reduced, and the premixing effect is achieved;
secondly set up the baffle at intermediate bin and mixer connecting channel lower extreme, can make more materials get into the mixer mixing area, reduce the splash of static regional material to improve mixer work efficiency.
According to the scheme, the intermediate bin and the mixer are connected with the upper end of the channel, the baffle is arranged at the feed inlet of the channel, and the angle between the baffle and the horizontal plane is 90-150 degrees.
According to the scheme, the middle bin and the mixer are connected with the lower end of the channel, the baffle is arranged at the discharge port of the channel, and the angle between the baffle and the side wall of the mixer is 0-60 degrees. Wherein 0 ° means that no baffle is provided.
Compared with the prior art, the invention has the beneficial effects that:
firstly, the batch particle layering phenomenon is slowed down: in the middle bin, when the material is fed into the bin in a conical shape under the action of gravity and flows freely, coarse fraction rolls to the bottom of the cone and near the bin wall at the periphery, while fine fraction is concentrated at the top and the central part of the cone to form the granularity segregation phenomenon of the material. When discharging, the fine fraction material in the center of the cone and near the center is discharged first, and the coarse fraction near the wall of the bin is less than that in the flow. The air resistance of batch particles with different shapes and weights, which do free-fall movement under the action of gravity, is different, so that the batch is seriously layered. According to the invention, the baffle is arranged at the upper end of the connecting channel between the intermediate bin and the mixer, so that the friction between the discharged materials and the baffle and the wall of the channel is increased, the segregation and layering phenomena among different materials are reduced, and the premixing effect is achieved.
Secondly, the amount of the batch binder is reduced: in the intermediate bin, the material in the lower layer of the bin is under the action of gravity of the material in the upper layer, the force is called as main stress, the force is increased along with the deepening of the bin depth, the material is positioned around a discharge opening at the bottommost layer of the bin, the size of a particle gap is reduced, the mutual engaging force of particle surfaces is increased, and particularly when the material particles contain pore water, strong surface tension is generated on the water surfaces of concave liquid surfaces among the particles, so that the cohesive force among the particles is increased, and the cohesive bonding material is formed. According to the invention, the baffle is arranged at the upper end of the connecting channel between the intermediate bin and the mixer, so that the mutual friction between the binding material and the surrounding environment is increased when the intermediate bin discharges materials, and the binding material is ground to a certain extent, thereby reducing the amount of the binding material entering the mixer.
Thirdly, reducing the splashing of materials into the static area of the mixer: the motion trail of the stirring paddle of the mixer has a specific range, so that the mixer has a mixing blind area, and materials in the blind area are in a static state, thereby greatly reducing the material mixing efficiency. According to the invention, the baffle is arranged at the lower end of the connecting channel between the intermediate bin and the mixer, so that the materials can be ensured to enter the mixing area, and the splashing of the materials in the static area is reduced.
Drawings
FIG. 1 shows the upper feed inlets of the intermediate bin and the connecting channel, 1-1 is the main body of the intermediate bin, 1-2 is the large granular material in the bin, 1-3 is the small granular material in the bin, 1-4 is the upper feed inlet of the connecting channel, 1-5 is the baffle plate arranged at the upper end of the connecting channel, the angle between the baffle plate and the horizontal plane is sigma1=90°~150°;
FIG. 2 shows a mixer and a discharge port at the lower end of a connecting passage, 2-1 is a main body of the mixer, 2-2 is a discharge port at the lower end of the connecting passage, 2-3 is a baffle plate arranged at the lower end of the connecting passage, and the angle between the baffle plate and the side wall of the mixer is sigma2The angle is 0-60 degrees, 2-4 is a material static area, and 2-5 is a mixed area.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following examples, the raw materials of the glass mainly include stoneware sand, telemine sand, Danyang sand, calcite, dolomite, aurichal, mirabilite, and petroleum coke powder, and the specific chemical compositions of the raw materials are shown in tables 1 and 2 by mass percentage.
TABLE 1
Name (R) SiO2 Al2O3 Fe2O3 CaO MgO K2O Na2O LOl
Stone door sand 2 98.74 0.62 0.08 0.03 0.02 0.02 0.04 0.30
Safety sand 99.38 0.18 0.04 0.03 0.04 0.05 0.14 0.12
Danyang sand 95.59 1.85 0.16 0.08 0.07 0.92 0.81 0.22
Calcite 0.32 0.11 0.08 54.95 0.33 - - -
Dolomite 1.11 0.15 0.06 29.98 21.53 - - -
TABLE 2
Name (R) Na2O NaCl Na2CO3 Na2SO4 C
Gold earth alkali 58.18 0.44 99.46 0.04 -
Natrii sulfas 43.48 - 0.18 99.40 -
Petroleum coke powder - - - - 89.96
Examples 1 to 8
The method for improving the raw material mixing efficiency based on optimizing the glass material mixer comprises the following steps:
1) FIG. 1 shows the feed inlet at the upper end of the intermediate bin and the connecting channel. In the figure 1, 1-1 is the main body of the intermediate bin, 1-2 is large particle materials in the bin, 1-3 is small particle materials in the bin, 1-4 is the feed inlet at the upper end of the connecting channel, 1-5 is the baffle plate arranged at the upper end of the connecting channel, and the angle between the baffle plate and the horizontal plane is sigma1=90°~150°;
2) FIG. 2 shows the mixer and the discharge opening at the lower end of the connecting channel. In FIG. 2, 2-1 is the mixer body, 2-2 is the discharge port at the lower end of the connecting channel, 2-3 is the baffle plate arranged at the lower end of the connecting channel,the angle of the baffle to the side wall of the mixer being sigma2The angle is 0-60 degrees, 2-4 is a material static area, and 2-5 is a mixed area.
3) The glass composition design is shown in table 3. The raw materials of the glass mainly comprise stoneware sand, telemine sand, sodium aluminate, calcite, dolomite, auricome, mirabilite, petroleum coke powder and the like, and the raw materials are crushed, screened and weighed so as to meet the design requirements of the glass components shown in the table 3, and the weighed raw materials are transported to a mixer to finally finish the preparation of the batch.
TABLE 3
4) In actual production, the indexes to be achieved when the batch materials meet the melting conditions are shown in table 4.
TABLE 4
Item Mixing time Water content (%) Temperature (. degree.C.) Alkali content (%) Mean difference
Index (I) 3min10s-3min30s 4.5-5.3% 36-50 18±0.8 0.5, the smaller the better
Table 5 shows the angle σ between the upper end baffle and the horizontal plane in examples 1-81And the angle sigma between the lower end baffle and the side wall of the mixer2The specific numerical value of (1). In examples 1 to 4, the influence of different angles of the upper end baffle on the mixing of the batch materials is explored under the condition that the lower end baffle is not arranged; examples 5-8, the effect of different lower end baffle angles on batch mixing was explored at the same upper end baffle angle.
TABLE 5
Examples 1 2 3 4
σ1/σ2 0°/0° 90°/0° 120°/0° 150°/0°
Examples 5 6 7 8
σ1/σ2 90°/0° 90°/30° 90°/45° 90°/60°
Table 6 shows the technical indexes of mixing the batch materials in 8 groups of examples obtained by modifying the glass batch mixer according to the actual production conditions of the factory, collecting the glass batch materials in the mixer at 20s min intervals, and testing the indexes.
TABLE 6
As can be seen from examples 1-4 in Table 6, the mean square error is the largest without the upper baffle, even the production specification requirement is not met. When setting up the upper end baffle and along with the increase of upper end baffle angle, the material is at the increase of whereabouts in-process frictional force, reduces the binder volume to a certain extent, slows down segregation, layering phenomenon between the different material granule, plays premixed effect, but the material flow space reduces for jam phenomenon appears in the extrusion each other. In practical experiments, when the angle between the upper end baffle and the horizontal plane is 90 degrees, the mean square error is minimum, the premixing effect is best, namely, the friction force of the falling process of the materials can be increased, the amount of the bonding materials is reduced, and the segregation and layering phenomena among different materials are relieved; but also can prevent the situation that the materials are mutually extruded to block the connecting channel.
It can be seen from examples 5-8 in table 6 that, at the same upper end baffle angle, as the lower end baffle angle increases, more material enters the mixing area of the mixer, thus reducing the splashing of material in the static area and improving the mixing efficiency of the mixer. However, when the angle is set to be too large as in embodiment 8, on one hand, the situation of blocking the feeding port of the mixer can occur, and on the other hand, the materials are excessively concentrated on the bearing of the stirring blade, so that the materials are mixed unevenly, and the mixing efficiency of the mixer is reduced. In an actual experiment, when the angle between the lower end baffle and the side wall of the mixer is 45 degrees, the mean square error is minimum, so that more materials can enter a mixing area of the mixer, and the mixing efficiency of the mixer is improved; and the phenomenon of material blockage at the feed inlet of the mixer can be avoided, so that the mean square error of the batch is optimized, and the product quality and the working efficiency of the whole production process are improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (1)

1. The method for improving the mixing efficiency of the raw materials based on the optimization of the glass material mixer is characterized in that baffles are arranged at the upper end and the lower end of a connecting channel between the intermediate bin and the mixer; the baffle plate at the upper end of the connecting channel of the intermediate bin and the mixer is arranged at the feed inlet of the channel; the baffle plate at the lower end of the connecting channel of the intermediate bin and the mixer is arranged at the discharge port of the channel;
intermediate bin and setting position and angle that mix quick-witted connecting channel upper end and lower extreme baffle: the upper end of the connecting channel of the intermediate bin and the mixer is provided with a baffle plate at the feed inlet of the channel, and the angle between the baffle plate and the horizontal plane is 90 degreeso(ii) a The middle bin and the mixer are connected with the lower end of the channel, the baffle is arranged at the discharge port of the channel, and the angle between the baffle and the side wall of the mixer is 45 degreeso
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753684A (en) * 1971-08-30 1973-08-21 Koninklijke Hoogovens En Staal Method for the manufacturing of baked ore pellets

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104276760B (en) * 2013-09-27 2017-05-17 东旭科技集团有限公司 Dosing method and system used in PDP (plasma display panel) glass substrate production process
CN104548984B (en) * 2015-01-16 2017-03-29 厦门帮众科技有限公司 A kind of energy-saving machinery formula mixing and drawing-in device
CN206393817U (en) * 2017-01-13 2017-08-11 南宁市嘉大混凝土有限公司 A kind of blending device of premixing regeneration concrete raw material

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753684A (en) * 1971-08-30 1973-08-21 Koninklijke Hoogovens En Staal Method for the manufacturing of baked ore pellets

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