CN104445865A - Preparation method of glass batch particle/block - Google Patents
Preparation method of glass batch particle/block Download PDFInfo
- Publication number
- CN104445865A CN104445865A CN201410509710.7A CN201410509710A CN104445865A CN 104445865 A CN104445865 A CN 104445865A CN 201410509710 A CN201410509710 A CN 201410509710A CN 104445865 A CN104445865 A CN 104445865A
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- CN
- China
- Prior art keywords
- glass
- batch
- glass batch
- preparation
- powder
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B1/00—Preparing the batches
- C03B1/02—Compacting the glass batches, e.g. pelletising
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
The invention relates to a preparation method of a glass batch particle/block. The preparation method is mainly characterized by comprising the following steps: placing quartz sand and feldspar or broken glass or quartz sand, feldspar and broken glass into a powder mill for carrying out powder milling until over 80% of the particles are 200-mesh, wherein the mass of the glass batch subjected to powder milling is not less than 20% of total mass of the glass batch; mixing powder-milled powder or slurry and powdery soda ash, sodium sulfate, dolomite and limestone to obtain a mixture, and then uniformly mixing the mixture and water so that the moisture content of the batch mixture in percentage by mass is 8-15%; granulating or briquetting the wetted batch mixture by virtue of a ball-making machine or a briquetting machine; and standing the granulated batch for over three days. By the preparation method, under the condition that no binder is added, the self-adhesion of the glass batch during the granulation process is achieved; the lower limit of the particle size of the raw material does not need to be controlled, the raw material cost is decreased and the effective utilization rate of resources is increased; and a series of drawbacks caused by the introduction of the bulk glass batch into a melting kiln are eliminated.
Description
Technical field
The present invention relates to a kind of glass batch preparation method for material.
Background technology
Glass batch is mixed according to certain ratio by the mineral such as quartz sand, feldspar, Wingdale, rhombspar, soda ash, saltcake and glass cullet or industrial chemicals.According to existing method, this putting in glass melter with the form of loose shape through mixed uniformly glass batch is melted.But this traditional technology exists a series of defect, such as: (1) layering (or segregation) phenomenon easily occurs in mixing, conveying, storage, discharge process, even forms material group, makes mixture homogeneity be deteriorated and then affect refining quality.(2) raw material of these loose shapes enters after in kiln, very easily causes dust from flying to make kiln body corrode and block regenerator in kiln.(3) large quantity of air brought into by the admixtion that these loose shapes are piled up, and affects thermal conductivity, reduces melting efficiency, and in glass melt, produce the microbubble being difficult to remove.(4) in order to reduce the impact of these unfavorable factors, existing frit raw material standard has to propose stricter restriction to various raw material granularity composition, the granule content such as, being less than 0.1mm in quartz sand can not more than 5%, this just means that a large amount of fine powders has to separate, can not get effective utilization, according to statistics, at least there is the quartz sand resources of 20% to have to be abandoned, cause the wasting of resources and environmental problem.
Being granulated (briquetting or balling-up) to admixtion is the better scheme solved the problem.Glass batch after granulation not only eliminates dust and layering is eliminated, and also due to the increase greatly of contact area between particle, enhances low-temp reaction degree; Admixtion after granulation can make thermal conductivity increase, and then improves melting rate; By granulated processed, thinner quartz sand also can be utilized.Therefore, granulating of the batch process can improve the uniformity coefficient of admixtion, improve melting rate, extends melting furnace life-span, improves Working environment, improves the utilization ratio of resource.
But up to now, the granulation of glass batch still rests on experimental stage, not yet obtains large-scale industrial application, and many gordian techniquies not yet make a breakthrough, and constrains further developing of this technology.One of bottleneck is the adhesion problem of glass batch.Because frit itself does not have viscosity, in granulation or briquetting process in order to ensure enough intensity in case fragmentation in transportation, certain binding agent must be added or sinter.The cost of sintering is too high-leveled and difficult with application; if and adopt binding agent; then require binding agent at a low price, nontoxic, non-corrosiveness, can not containing the component harmful to glass; not yet find at present to meet these binding agents required; as during separately using water as binding agent; the intensity of pellet is very low, can not meet the needs of conveying.Once people was had with wilkinite, water glass and starch for binding agent (CN101913752), the report that somebody's water glass (water glass), spent pulping liquor, profit waste liquid and starch waste liquor (CN101318762A) are binding agent.But the equal existing defects of these binding agents, they also exist poisonous and harmful, high cost in various degree or have potential hazard to glass.
Patent of invention CN101891368B glass pellet and preparation method thereof, carries out bonding granulation with briquetting press to the powder being less than 0.4mm, then feeds dryer and dry.The binding agent adopted is sodium hydroxide or water glass or calcium hydroxide.
Up to now, the method for all about glass batch granulation all needs outer adding additives.Not additional any binding agent, utilizes the method for Mechanochemical Effect to have no report.
Summary of the invention
The object of the present invention is to provide one not need other binding agents additional, the preparation method of the glass batch grain/block of self-adhesive in glass batch grain/blocking process can be realized.
The present invention, mainly based on alkali-silica reaction and Mechanochemical Effect principle, proposes a kind of preparation method of brand-new glass batch, by quartz sand, feldspar and glass cullet in frit are carried out grinding, utilizes Mechanochemical Effect to improve SiO
2activity, recycling alkali-silica reaction, make active SiO
2generate the water glass with tackiness with soda ash generation chemical reaction, realize the self-adhesive of glass batch.
The present invention adopts following technical scheme:
(1) grinding: by the quartz sand in glass batch and feldspar, or glass cullet, or quartz sand, feldspar and glass cullet, be placed in pulverizer and carry out grinding, be reduced to 200 orders to granularity and be greater than 80%, and the cooperation doses of carrying out grinding is no less than 20% (wt) of admixtion total amount.This grinding operation can adopt various milling equipment, and grinding process both can adopt dry operation also can adopt wet work.The time of grinding is longer, active SiO
2content more, the gummous substance generated by alkali-silica reaction is more, and the intensity of pellet is also larger.
(2) mix: by the powdery soda ash (Na in the powder after grinding or slurry and glass batch
2cO
3), saltcake (Na
2sO
4), rhombspar and Wingdale mix, then mix with water, makes batch mixtures moisture content be 8-15% (mass percent).
(3) briquetting: adopt apparatus for making pearl ball or briquetting press to be granulated or blocking wetting batch mixtures.
(4) maintenance: the admixtion of granulation is placed more than 3 days, treats its hydration and hardening, and its hardness extends in time and increases, and according to different transport conditions, selects suitable storage period.
The mechanism of action of the present invention: in recent years, along with the in-depth of imitative ground diagenesis theory, people more and more recognize, many mineral all have lateral reactivity, under some specific condition, this activity can be excited out, and Mechanochemical Effect is exactly the effective ways exciting its activity.So-called Mechanochemical Effect causes the process of material recurring structure and physicochemical property change by applying mechanical force to material.Under the continuous effect of mechanical force, initial period is the reduction of substance particle size and the increase of specific surface area mainly, but after acquiring a certain degree, occur due to short grained gathering pulverizing balance, along with the continuous action of mechanical force, material constantly absorbs and accumulation energy, provide the thermodynamic condition needed for crystal conversion, produce lattice deformation and defect, make it recurring structure and change, cause material grains refinement, crack, specific surface area increase etc.These change the change of dispersity, solubleness, dissolution rate, density, adsorptivity, electroconductibility, catalytic, coking property, ion-exchange capacity and the physico-chemical property such as replacing power, surface free energy that finally can cause material, the fracture of matter chemistry key can be caused, generate unsaturated group, free ion and electronics, produce new surface, cause lattice imperfection, make increase in material, be in a kind of chemical activity state of instability, and make many reactions that can not occur under normal pressure, room temperature condition become possibility.
Adopting pulverizer (such as ball mill) to carry out grinding to glass batch is the effective ways producing Mechanochemical Effect, in grinding process, along with the continuous reduction of granularity, surface energy improves constantly, agglomeration is just more and more violent, and this just makes self-adhesive become possibility.
Quartz sand in glass batch and feldspar account for 55-75 (wt) about the % of whole frit, and main component is wherein SiO
2, test proves, in grinding process, along with the reduction of granularity, the increase of specific surface area, the breaking bonds on quartz sand particle surface increases, and occurs unformed layer, the micritization that X-ray diffraction analysis shows surface even non-crystallization degree increases, the SiO in quartz sand and feldspar
2activity can be further enhanced; Also containing soda ash (Na in glass batch
2cO
3), its hydrolysis generates NaOH, under the effect of this strong basicity exciting agent, and active SiO
2can occur " alkali-silica reaction " with basic component, form the water glass with gelling.
2NaOH+nSiO
2+H
2O→Na
2O·nSiO
2·nH
2O (1)
The glass cullet of 15-35 (wt) %d are also included, wherein containing a large amount of amorphous SiO in frit
2, its activity is far longer than the SiO of crystal
2, in grinding process, its activity also can increase further.These active SiO
2all likely there is " alkali-silica reaction " reaction with alkali.In addition, can, with the calcium oxide water generation reaction Calucium Silicate powder in glass batch, also be also a kind of gel, produce tackiness.This character is used, just likely realizes the self-adhesive of glass batch, for the granulation of admixtion creates conditions.
Theoretical according to glass, the solution time of glass batch is mainly by SiO
2the fusing time of raw material determines, the solution time being 0.4mm silica sand as granularity is only 1/4 of granularity 0.8mm silica sand solution time.Bao Te Vygen proposes formula below to calculate the impact of size for glass formation time of quartz particles:
t＝0.125K
1D
3(2)
T in formula-glass formation time, min; D-virgin quartz particle diameter, cm; K
1-the constant relevant with glass ingredient and temperature.
Can find out, glass formation time becomes cube relation with quartz particles diameter, illustrates that the diameter of particle has a great impact for the formation time of glass.After grinding, along with the reduction of raw material granularity, temperature of fusion can decline, melting rate can accelerate, and then reduces energy consumption, prolongation refractory life, and melting cost is reduced.
The invention has the beneficial effects as follows:
(1) under the prerequisite of not outer adding additives, realize the self-adhesive of glass batch granulation, eliminate the potential hazard that additional binding agent brings;
(2) because the quartz sand of most infusibility is by fine grinding, fusing time can be made to obtain shortening, melting rate is improved;
(3) without the need to controlling the granularity lower limit of raw material, reducing raw materials cost, improve the effective rate of utilization of resource;
(4) eliminate glass batch and feed with loose shape the series of malpractice that melting furnaces bring.
Accompanying drawing explanation
Fig. 1 is pellet X-ray diffractogram after the grinding of example 1 of the present invention.
Fig. 2 is the agglutinating test striograph of the loose shape glass batch of tradition.
Fig. 3 is the pellet agglutinating test striograph after the grinding of example 1 of the present invention.
Fig. 4 is the pellet agglutinating test striograph after the grinding of example 2 of the present invention.
Fig. 5 is the dsc analysis figure of the loose shape glass batch of tradition.
Fig. 6 is the dsc analysis figure of example 2 glass batch of the present invention.
Fig. 7 is that the fusion test sample of example 3 glass batch of the present invention and tradition are fallen apart the fusion test sample comparison diagram of shape glass batch.
Embodiment
Embodiment 1
Carry out charge calculation according to float glass composition (table 1), the proportioning obtaining the various admixtiones such as quartz sand, Feldspar Powder, Wingdale, rhombspar, soda ash, saltcake is as shown in table 2.
The component list of table 1 float glass admixtion
Various raw material composition (wt%) in table 2 test float glass admixtion
Quartz sand 56.87kg, Feldspar Powder 7.22kg are carried out ball milling together, grinding time 5 hours, be milled to 200 orders and be greater than 80%.The raw materials such as the powder after grinding and 2.58kg Wingdale, 16.32kg rhombspar, 16.28kg soda ash, 0.66kg saltcake are mixed together evenly, and spray into water smoke to batch mixtures, water content is made to be 13% (quality), then be contained in mould, be pressed into Φ 32mm × 16mm block by briquetting press.Place after 72 hours, after measured, ultimate compression strength reaches 8.3MPa.Through X-ray diffraction analysis, as shown in Figure 1, although due to content very low, do not occur the diffraction peak of water glass, the peak finding that there is hydrated calcium silicate occurs, and hydrated calcium silicate is a kind of gelling material, can by cementing for sand.Adopt again image sintering instrument to analyze sample, result as shown in Figures 2 and 3, can be found out, when the loose shape admixtion of tradition sinters, hemispherical temperature is 1056 degree, and the hemispherical temperature that grinding ballast sample of the present invention occurs is 750 DEG C, shows that temperature of fusion have dropped 306 DEG C.
Embodiment 2
Carry out charge calculation by White Spirit Bottle composition (table 3), according to calculation result, the proportioning of various raw material is as shown in table 4.
The designing chemical composition of table 3 container glass
* R here represents basic metal, i.e. K, Na
Various raw material composition (wt%) in table 4 white glass bottle admixtion
Be 100Kg, glass cullet 20Kg by raw material amount, total dosage 120Kg.
20Kg glass cullet are crushed to below 10mm, be placed in ball mill, for preventing mixing iron, these ball mill building stones do liner plate, take pebbles as ball-milling medium, grinding 5 hours, granularity is milled to-200 orders and is greater than 80%, then by glass cullet powder and other raw material and silica sand 60.37kg, Wingdale 2.95kg, rhombspar 15.98kg, soda ash 19.53kg, saltcake 0.81kg and carbon dust 0.04kg (carbon dust is as reductive agent) mixes, apparatus for making pearl ball is adopted to be pressed into the ball material that granularity is about Φ 30mm, at room temperature leave standstill after 5 days, analytical results shows, density is 2.67, distance floor level 1 meter of freely falling body does not have fragmentation, granule strength can meet the requirement of conveying feed.Adopt image sintering instrument to analyze sample, as shown in Figure 4, hemispherical temperature is 920 DEG C to result, reduces 136 DEG C than the temperature of fusion of traditional loose shape admixtion.Compare through DSC test and the tradition shape admixtion that falls apart again, as shown in Figure 5 and Figure 6, the present invention and the tradition shape admixtion that falls apart compares, heat decomposition temperature drops to 861.3 DEG C by 879 DEG C, silicate reaction temperature drops to 905.6 DEG C by 1007.2 DEG C. and heat decomposition temperature drops to 861.3 DEG C by 879 DEG C, and silicate reaction temperature drops to 905.6 DEG C by 1007.2 DEG C.
Embodiment 3
According to the formula of table 2, take 10kg quartz sand, 5kg Feldspar Powder and 10kg glass cullet respectively and be placed in ball mill together with 15Kg water and carry out wet grinding, inner liner of bowl mill adopts quartzite, and with corundum ball for powder grinding medium, grinding fineness is that 200 orders are greater than 80%.By the powder slip after grinding and other frits remaining in allocation sheet: quartz sand 46.87kg, feldspar 2.22kg, Wingdale 2.58kg, rhombspar 16.32kg, soda ash 16.28kg, saltcake 0.66kg mix, briquetting press is adopted to be suppressed into the disk of diameter 3.5cm, height 1.5cm.Test-results shows, after natural curing in 3 days, ultimate compression strength still can reach 3.4MPa, can meet chip-proof requirement in course of conveying completely.Carried out parallel fusion test together with the tradition shape admixtion that falls apart, result as shown in Figure 7, can be observed from the material block of fusing, functional according to the batch melting after method briquetting of the present invention, and the microbubble content in glass is less than the loose shape admixtion of tradition.
Claims (2)
1. a preparation method for glass batch grain/block, is characterized in that:
(1) grinding: by the quartz sand in glass batch and feldspar, or glass cullet, or quartz sand, feldspar and glass cullet, be placed in pulverizer and carry out grinding, be reduced to 200 orders to granularity and be greater than 80%, and the cooperation doses of carrying out grinding is no less than 20% of admixtion total mass;
(2) mix: the powder after grinding or slurry are mixed with powdery soda ash, saltcake, rhombspar and the Wingdale in glass batch, then mixes with suitable quantity of water, make the mass percent of batch mixtures moisture content be 8-15%;
(3) briquetting: adopt apparatus for making pearl ball or briquetting press to be granulated or blocking wetting batch mixtures;
(4) maintenance: the admixtion of granulation is placed more than 3 days, treats its hydration and hardening.
2. the preparation method of glass batch grain/block according to claim 1, is characterized in that: mechanical milling process adopts dry operation or adopts wet work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410509710.7A CN104445865A (en) | 2014-09-28 | 2014-09-28 | Preparation method of glass batch particle/block |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410509710.7A CN104445865A (en) | 2014-09-28 | 2014-09-28 | Preparation method of glass batch particle/block |
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| Publication Number | Publication Date |
|---|---|
| CN104445865A true CN104445865A (en) | 2015-03-25 |
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|---|---|---|---|
| CN201410509710.7A Pending CN104445865A (en) | 2014-09-28 | 2014-09-28 | Preparation method of glass batch particle/block |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112624568A (en) * | 2020-12-31 | 2021-04-09 | 凤阳常隆科技材料有限公司 | Glass kiln burdening production method |
| CN115231803A (en) * | 2022-07-08 | 2022-10-25 | 兆虹精密(北京)科技有限公司 | Granulation method of glass batch |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03228831A (en) * | 1990-01-31 | 1991-10-09 | Nippon Sheet Glass Co Ltd | Method for granulating briquet batch |
| CN103102057A (en) * | 2013-02-07 | 2013-05-15 | 燕山大学 | Preparation method of self-bonding and pre-decomposing glass batch |
| CN103482848A (en) * | 2013-08-26 | 2014-01-01 | 吴江光华玻璃厂 | Pelletizing production process for glass batch mixture |
-
2014
- 2014-09-28 CN CN201410509710.7A patent/CN104445865A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03228831A (en) * | 1990-01-31 | 1991-10-09 | Nippon Sheet Glass Co Ltd | Method for granulating briquet batch |
| CN103102057A (en) * | 2013-02-07 | 2013-05-15 | 燕山大学 | Preparation method of self-bonding and pre-decomposing glass batch |
| CN103482848A (en) * | 2013-08-26 | 2014-01-01 | 吴江光华玻璃厂 | Pelletizing production process for glass batch mixture |
Non-Patent Citations (1)
| Title |
|---|
| N.I.SHALUNENKO,ET AL.: "Use of a pulverizer as a mechanical batch activator for glass melting", 《GLASS AND CERAMICS》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112624568A (en) * | 2020-12-31 | 2021-04-09 | 凤阳常隆科技材料有限公司 | Glass kiln burdening production method |
| CN115231803A (en) * | 2022-07-08 | 2022-10-25 | 兆虹精密(北京)科技有限公司 | Granulation method of glass batch |
| CN115231803B (en) * | 2022-07-08 | 2023-07-07 | 兆虹精密(北京)科技有限公司 | Granulating method of glass batch |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |
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