RU2588013C1 - Method for production of coloured glass mass - Google Patents

Abstract

FIELD: glass.

SUBSTANCE: invention relates to methods of producing coloured glass mass and can be used in production of glass containers and sheet glass by the float-method. Result is achieved by using 10-15 % of recycled glass scrap and 10-15 % of cullet, having a variable concentration of colouring components and formed at direct and reverse re-coloring of glass mass. To reduce approximately twice the duration of transient process, at the moment of re-coloring cycle start, the glass furnace having the efficiency 500-600 t of colourless glass mass per day is loaded with a charge with increased in three times concentration of colouring components and scrap glass with stable colour during the first day. Scrap glass with variable colour formed in the first five days after the beginning of re-coloring of glass mass, as well as in the latter five days of cycle at reverse re-coloring, are stored depending on concentration of colouring components in separate bins with capacity 500-600 t; further this glass scrap content in loaded charge is reduced by 2-12 % concentration of colouring components if a scrap glass with high content of dyes is used. If loaded scrap glass has low concentration of dyes, which was formed in the previous cycle of reverse re-coloring of glass mass into colourless one, the content of colouring components is increased by 1-13.5 %.

EFFECT: technical result is increased efficiency of coloured in mass glass boiling in high-efficiency glass-melting furnaces due to periodic (period of 60-90 days) repainting of colourless glass mass in colour one, stable chemical composition of glass mass using portions of cullet with variable colour and complete utilisation of waste glass.

1 cl, 3 dwg, 2 ex

Description

The technical solution relates to the glass industry and can be used in the manufacture of colored glass mass produced by various methods, including the high-performance float method. Usually stained glass is obtained by introducing into the main mixture intended for cooking colorless glass, substances that give the glass a color and certain lighting characteristics. At the same time, one of the key raw materials used for cooking colorless and color glasses in large-scale production is its own return glass, which allows you to effectively influence the glass making process and make it stable and reproducible.

However, in modern technologies of cooking with a high (up to 90%) coefficient of use of glass melt, its own cullet is not enough [1], which is especially characteristic for the production of glass colored in bulk. The use of only their own technological cullet under these conditions complicates the glass melting, since it is necessary to reduce its share in the charge / cullet ratio to 10-20%, while stable and efficient glass making is carried out in the presence of at least 20-30% cullet in the charge. The additional use for this purpose of imported cullet, even having slight deviations in the chemical composition and color of the glass, is often limited due to the large material and energy costs associated with washing, drying and sorting it. Therefore, in the production of certain types of glass, for example, heat-absorbing glass of bronze color, the use of imported combat is practically excluded.

A known method for the production of heat-absorbing glass "STESA" having a different color gamut [2], determined by the set and number of different coloring components in the glass mixture of the basic composition, intended for cooking and producing colorless glass. The disadvantage of this method is the use of only its own technological cullet in the amount of 10-15% of the welded glass melt, which does not significantly increase the efficiency of the glass melting process and is limited to glass melting in glass melting furnaces with a productivity of 150-200 tons of glass melt per day. At the same time, continuous boiling of stained glass in more efficient and efficient glass melting furnaces with a capacity of 500-600 tons of glass melt per day is limited by regional problems of marketing such a volume of glass and an even greater lack of cullet having the necessary chemical composition.

There is also known a method of disposal of mixed colored cullet with the aim of obtaining amber, green or colorless glass [3]. To regulate the color of the glass in this technical solution, bleach is added to the cullet mixture (compounds Mn, Co, Ni, selenides for physical bleaching, compounds Zn, Ce, As for chemical bleaching and a dye that enhances the color of the glass. The mixture of multi-colored cullet and additives is boiled until receiving the set glass color.

The disadvantage of this method of preparing and cooking mixed cullet is the limited possibility of its use in continuous technological processes for the production of glass colored in bulk because of frequent fluctuations in glass shade, the appearance of strips and layers of glass of a different color, the complexity of adjusting the composition during continuous cooking of incoming cullet, each of which has its own set of glasses, differing in chemical composition and color.

The closest technical solution to the claimed is a method for the production of colored glass in the mass [4], including the preparation of the mixture and cullet, glassmaking using a high content of cullet in the mixture and the production of glass melt. The preparation of cullet in this method is carried out by pre-cooking part of the mixture and mixed multi-colored cullet in an additional glass melting furnace. Preliminary cooking of a portion of the charge with imported cullet allows you to create your own cullet, the composition and quality of which is as close as possible to the produced glass, and to control lighting characteristics and color shades of glass. Also, at the stage of preliminary cooking of a part of a mixture with mixed cullet of different industries, it becomes possible to adjust the composition of the mixture by chemical elements in the cullet.

The disadvantage of this technical solution is the need to average the chemical composition of dissimilar batches of cullet by cooking it with part of the charge in an additional glass melting furnace. In addition, careful preparation and averaging of cullet batches having different colors and different chemical compositions is required, and the use of an additional glass melting furnace for these purposes increases the cost of cullet and final products in the production of glass in the main glass melting furnace. Very frequent adjustments to the chemical composition of the mixture, including the introduction of various dyes and bleaches of molten glass into its recipe, are not excluded, which not only complicates the process of preparing a multicomponent mixture of raw materials, but also violates the stability of the glass melting process. There are also restrictions on the use of this method when cooking glass in high-performance glass melting furnaces.

The problem to be solved is to increase the efficiency of the process of cooking colored glass in high-performance glass melting furnaces by increasing the amount of cullet having a chemical composition that is as close as possible to the chemical composition of the produced glass.

This technical result is achieved by the fact that in the method of manufacturing a glass colored in bulk, which includes preparing a charge consisting of the main glass-forming and dyeing components, loading the mixture and mixed cullet into a glass melting furnace, melting and producing glass, glass melting is carried out with periodic repainting of colorless glass melt, in which a charge with a concentration of coloring components is loaded three times more into a glass melting furnace with a capacity of 500-600 tons of glass melt per day; th desired value, and painted with a cullet with a stable color, accumulated in the previous cycle of repainting glass. Further, the number of coloring components in the charge is reduced to the concentration required for stable glass coloring, and all glass produced during the first five days, which has a transitional color with an increased and reduced concentration of coloring components, is stored in five separate bins with a capacity of 500-600 tons each and the completion of the process of repainting it alternately in the amount of 10-15% of the total mass of the loaded mixture of the mixture and cullet is added to 10-15% of the return cullet, which has a stable color. At the end of the cullet with a transitional color obtained during the repainting of colorless glass to colored, 10-15% of the cullet with stable color is added to 10-15% of the cullet with a reduced concentration of coloring components formed during the reverse repainting of colored glass to colorless in the previous cycle repainting glass. Moreover, throughout the entire production cycle of colored glass melt, the duration of which is 60-90 days, in the batches of the charge corresponding to the loaded portions of the cullet with an increased concentration of coloring components, the concentration of the coloring components is reduced by 2-12%, and in the batches of the charge corresponding to the loaded portions cullet with a reduced concentration of coloring components, increase the concentration of coloring components by 1-13.5%. At the end of the cycle, six days before the end of the production of colored glass in the bulk, a charge containing no coloring components and a colorless cullet accumulated in the previous production cycle of colorless glass are loaded into a glass melting furnace. After that, a colored cullet formed over the past five days with a transitional decreasing concentration of coloring components is similarly stored in five separate bins with a capacity of 500-600 tons and used in the subsequent production cycle of colored glass.

The advantage of the proposed method for the production of glass colored in bulk is the possibility of periodically boiling it in a glass melting bathtub with a capacity of 500-600 tons of glass melt per day with an optimal amount of cullet, the content of which in the mixture-cullet is at least 20-30%. Moreover, all cullet used, including return technological cullet and cullet with variable color, formed during direct and reverse repainting of glass melt, has the same composition of chemical elements. This composition corresponds to the basic composition of colorless glass melt with the addition of a certain amount of the corresponding coloring components.

Another advantage of this method is a more efficient cooking of the same annual volume of stained glass, which is typical for furnaces with a capacity of 150-200 tons of glass melt per day, for a shorter period of time.

In addition, this method allows you to completely dispose of glass waste having a transitional color, which is achieved by separately storing batches of cullet with different color intensities and the corresponding correction of the number of coloring components in the charge. And a three-fold increase in the concentration of coloring components in the charge fed to the glass melting furnace on the first day after the start of repainting of the molten glass reduces the duration of the transient process of repainting by about half and reduces the production costs associated with it.

The implementation of this method of production of colored glass in the mass is illustrated using the drawings, on which:

FIG. 1 - production line for the production of colored glass;

FIG. 2 - graphs of changes in the concentration of coloring components in the mixture and glass in the initial stage of the repainting cycle;

FIG. 3 - graphs of changes in the concentration of coloring components in the mixture and glass in the final stage (reverse repainting) of the production cycle of colored glass in the mass.

The production process of colored glass in bulk is realized using a technological line (Fig. 1), which includes: a mixer 1 of a charge, which is part of a dosing and mixing line (not shown); weight cullet dispenser 2 with a stable concentration of coloring components; weight cullet dispenser 3 with a variable concentration of coloring components; conveyor 4 for feeding the charge and cullet into the hopper 5 loaders of the charge and cullet in the glass melting furnace 6; glass production line 7; bins 8 of glass waste at the mine; cullet crushers 9; longitudinal assembly conveyor 10 cullet; transverse intermediate conveyor 11 cullet; a first cullet flow distributor 12; gallery conveyor 13 cullet; a second cullet flow distributor 14; an intermediate conveyor 15 of colorless cullet; the first reversible conveyor shuttle 16 colorless cullet; the first group of 17 from 5-6 cullet bins equipped with discharge feeders (not shown) for storing colorless cullet; a first discharge conveyor 18 of colorless cullet; cullet loading conveyor 19; a third cullet flow distributor 20; a cantilevered hopper 21 of a cullet with a stable concentration of coloring components; a suspended weighing bin 22 with a variable concentration of coloring components (when cooking colorless glass, a colorless broken glass is fed into these silos); a first intermediate conveyor 23 of painted cullet; a second intermediate conveyor 24 of painted cullet; reversible conveyor 25 painted cullet; second and third reversible shuttle conveyors 26, 27 of painted cullet; the second group of 28 from 5-6 bins equipped with discharge feeders (not shown) for storing painted cullet and cullet obtained in the initial period of repainting of glass; the third group 29 of 5-6 bins equipped with discharge feeders (not shown) for storing cullet obtained by reverse repainting of the glass melt, the second and third unloading conveyors 30, 31 of the painted cullet and the third intermediate conveyor 32 of the painted cullet.

The technological line works as follows. The main mode of its operation is the cooking of colorless glass. At the same time, the duration of colorless glass melting, taking into account the periodic repainting of the glass melt once a year, is 9–10 months a year for the entire campaign (10–12 years) of a glass melting furnace with a capacity of 500–600 tons of glass melt per day. This mode is due to the highest efficiency of glass melting when repainting glass melt, the necessary and sufficient annual production of tinted glass on the same technological line with one glass melting furnace and minimization of losses.

In the process of operation of the line, a mixture having a basic recipe for cooking colorless glass is discharged from the mixer 1 to the conveyor 4 for feeding the mixture and cullet and transported to the hopper 5 of the feeders (not shown) of the mixture in a glass melting furnace 6. On the same conveyor using a weight batcher 2 or a dispenser 3 is supplied from the suspended weighing bins 21, 22 colorless cullet, which is formed on the line 7 of the production of glass. From the production line 7, the glass waste enters the bins 8, which are installed on the corresponding sections of the sides of the sides and the cutting of the glass tape, and after grinding in the crushers 9 are poured onto a longitudinal assembly conveyor 10 located along the entire glass production line. Then, the crushed colorless cullet is sent to the transverse intermediate conveyor 11 and, with the help of the first flow distributor 12, is discharged to the gallery conveyor 13, which is usually installed in an inclined gallery located outside the glass production workshop. After transportation through the inclined gallery, the cullet is fed to the second cullet stream distributor 14, which directs the crushed glass waste either to the intermediate conveyor 15 installed in the colorless cullet warehouse or directly to the cullet loading conveyor 19. From the conveyor 19, the cullet through the third distributor 20 of the stream enters one of the two suspended weighing bins 21, 22 cullet.

In the colorless cullet warehouse, glass waste from the intermediate conveyor 15 is poured onto the first reversible shuttle conveyor 16, which distributes the cullet into compartments of the first group of 17 bins (five to six bins). During storage, the cullet from these bins is alternately unloaded as necessary with the help of suitable feeders (not shown) to the first discharge conveyor 18, which feeds the cullet to the filling line of the suspended bunkers 21, 22, equipped with weight batchers 2, 3.

Before repainting colorless glass into colorless color cullet from overhang bins 21, 22, it is completely developed, and the overhang bunker 21 is filled with colored cullet with a stable concentration of coloring components. For these purposes, cullet is used, accumulated in a certain amount during the previous repainting of glass melt, and stored in a colored cullet warehouse in one of the bunkers with a capacity of 500-600 tons of cullet belonging to the second group of 28 bins.

Repainting colorless glass melt begins with the cessation of supply of colorless cullet, loading previously accumulated color cullet previously accumulated in the previous cycle, and simultaneously feeding the mixture with a three-fold increased concentration of coloring components, which is performed on the first day after the transition to the production of glass colored in bulk. Such a “doping” increase in the concentration of glass dyes in the mixture allows one to obtain, at the very beginning, faster repainting of the entire volume of glass melt in a glass melting furnace. This volume is approximately 3 times higher than the daily output of stained glass, so the first response to a “doping” increase in dyes in the charge appears in the glass mass fed to the production after about 16-18 hours, and the complete repainting of the glass mass taking into account the mass transfer and averaging ability of the glass melting furnace occurs in five days. In this case, the maximum excess of the concentration of coloring components in the glass, calculated by the formula given in [5], occurs after about two to three days and is approximately 120-130%. In accordance with this formula

Xst = Xh [1-exp (-τr / Mq)],

where Khst - the maximum deviation of the content of the coloring components in the glass,%;

Хш - deviation of the content of coloring components in the mixture,%;

r is the productivity of the glass melting furnace, t / day;

M is the capacity of the heated part of the glass melting furnace, t;

q is a coefficient taking into account the proportion of glass melt involved in homogenization;

τ is the duration of the pulsed ("doping") change in the concentration of coloring components in the mixture, days.

Substituting in this formula the values Xl = 300%, r = 500 t / day, M = 1700 t, q = 0.6, τ = 1 day., We obtain that Xst = 300 [1-exp (-1 * 500 / 1700 * 0.6)] = 120. This means that with a pulsed increase in the concentration of coloring components in the charge by 300% during the day, the maximum increase in their concentration in the glass in two or three days will be 120%.

A graph of the change in the concentration of the coloring components in the glass mass with a similar pulse increase in the charge is shown in FIG. 2 Taking into account the fact that a steady increase in the concentration of coloring components is followed by a stable amount of coloring components contained in the mixture during the entire cycle of repainting the glass melt, the resulting concentration of dyes in the glass during the transition period Khstr = Khst1 + Khst2 increases to 180% (Khst1 is the change in the concentration of coloring components in glass with a pulse (during the day) increase in the charge; Khst2 - change in the concentration of coloring components in the glass with a step change in the charge (the change period begins on the second day after the start of repainting)).

Without such a “doping” increase in the concentration of coloring components in the charge, complete repainting of the glass melt usually occurred within 10-12 days, which led to high costs and required large storage areas for storing cullet, which has a transitional color. Part of this cullet had to be either sold or disposed of in some way.

Since a few days after the “doping” introduction of the coloring components into the charge, the resulting content of these components in the repainted glass mass can exceed the required concentration by 20-80% within two to three days, it is necessary to reduce the concentration of coloring components in the appropriate portions with the subsequent use of these cullet batches blends loaded into a glass melting furnace. The remaining batches of cullet, having a lower concentration of dyes compared to the required, are loaded into the furnace together with the charge, in which the content of coloring components increases accordingly.

The supply of a mixture having an increased or decreased concentration of coloring components and a colored cullet into a glass melting furnace 6 is carried out similarly from a hopper 5 filled with a conveyor 4, onto which a mixture of the corresponding recipe is unloaded from a mixer 1 and supplied with a glass cullet from a weight batcher 2.

A technological cullet formed during the first five days with a variable concentration of coloring components is transported similarly to a colorless cullet after crushers 9 using a longitudinal assembly conveyor 10 and a transverse intermediate conveyor 11. Next, the cullet with a variable color passes through the first flow distributor 12 and is sent to the first and second intermediate conveyors 23, 24 of a painted cullet transporting glass waste to a non-ferrous cullet warehouse. In the warehouse, cullet with a variable concentration of coloring components is redistributed using the reversing conveyor 25 (from its first exit) and the second reversing shuttle conveyor 26 into separate containers that are part of the second group of 28 painted cullet bins. In one of the bunkers of this group, a colored cullet is stored with a stable concentration of coloring components, which was accumulated in the previous repainting cycle.

Of these bins, in the course of further work, using vibrating feeders (not shown), the second discharge conveyor 30 and the third intermediate conveyor 32, the colored cullet with a stable and variable concentration of coloring components is alternately discharged onto the cullet gallery 13. At the same time, the second flow distributor 14 directs the painted cullet to the cullet loading conveyor 19, from which it is loaded through the third flow distributor 20 either into the hung cullet of the cullet 22 with a variable concentration of coloring components, or into the suspended cullet of the cullet 21 with stable color.

After five days from the beginning of the repainting of the glass in the furnace, the process of glass melting with a stable concentration of coloring components begins. The technological cullet formed on line 7 of the production in this case is transported in an amount of 10-15% to a suspended bunker 21, from which it is unloaded using a weighing batcher 2 onto a conveyor 4 for feeding the charge and cullet. A cullet with a variable concentration of dyes is unloaded from the overhead bunker 22 through the weight batcher 3 in an amount of 10-15% to the same conveyor.

Considering that the concentration of coloring components in five batches of cullet obtained during five transitional days of direct repainting of molten glass and stored in separate bins, first varies from 0% to 180% with an average daily growth of 36%, and then (the fourth and fifth days ) decreases to the required values, the total concentration of dyes in the cullet supplied by weight dispensers 2, 3, changes compared with the required value. In this regard, the concentration of the coloring components in the mixture is recounted and either reduced in proportion to the increase in the concentration of dyes in the batches of cullet with variable color, or increased. The reduction of the coloring components in the charge is carried out only when using three to four batches of cullet formed during the “doping” introduction of dyes, and the increase is when using cullet formed in the first or second days after the start of repainting. For five days of repainting colorless glass melt into color in group 28, 2500-3000 tons of cullet with variable color accumulate. This amount of cullet with a productivity of a glass melting furnace equal to 500-600 tons of glass per day is 5.5-8.3% of the total amount of glass (30000-54000 tons) produced in 60-90 days of production of tinted glass. It should be borne in mind the same amount of cullet with a variable color, formed during the reverse distortion of colored glass to colorless. Therefore, in the production process of 30,000-54,000 tons of glass for 60-90 days, 2500-3000 tons of cullet with a variable color, formed during direct repainting in the current cycle, and 2500-30000 tons of cullet formed during reverse repainting in the previous cooking cycle painted in weight of glass. The total amount of cullet with variable color is 5000-6000 tons, which is 11.1-16.6% of the total amount of glass produced for the period under consideration. Given the small (about one percent) transport and storage losses of cullet, the total amount of cullet with variable color, which is added to 10-15% of the return cullet, is also about 10-15%, which allows to increase the total amount of cullet used up to 20-30 % (30% of cullet is used if the production cycle of stained glass lasts 60 days).

The process of accumulation of cullet formed during the reverse repainting of colored glass to colored is as follows. A cullet with a decreasing concentration of coloring components from crushers 9 is similarly discharged onto a longitudinal assembly conveyor 10 and then, using a transverse intermediate conveyor 11 and a first cullet flow distributor 12, it is sequentially loaded onto the first and second intermediate conveyors 23, 24 and the reversed conveyor 25 of the painted cullet. From the second exit of the reversing conveyor 25, a cullet with a decreasing concentration of coloring components is sent to the third reversing conveyor shuttle 27, which redistributes the waste glass on the containers of the third group of 29 bins. From these bunkers, a cullet with the help of vibrating feeders (not shown) is alternately unloaded as necessary onto a third discharge conveyor 31 and then similarly using a third intermediate conveyor 32, a gallery conveyor 13, a second cullet flow distributor 14, a loading conveyor 19 and a third flow distributor 20 it is transported to a suspended bunker 22 for subsequent metered feeding it into a glass melting furnace 6 using a weight batcher 3.

After the reverse repainting of the molten glass is completed, the first distributor 12 switches to its initial state and the waste of the colorless cullet begins to be stored either in the first group of 15 bins or in the over-weight bins 21, 22.

The implementation of this method of production of colored glass in the mass is illustrated by the following examples 1, 2.

Example 1

Consider the production of bronze-colored glass in bulk, for the preparation of which a mixture of the following composition is used:

- quartz sand with a high iron content - 697 kg / ton of glass;

- soda ash - 234 kg / t of glass;

- dolomite - 195 kg / t of glass;

- chalk - 59 kg / t of glass;

- feldspar - 27 kg / t of glass;

- sodium sulfate 6.7 kg / t of glass;

- nitrate - 4 kg / t of glass;

- metal selenium - 0.15 kg / t of glass;

- cobalt oxide - 0.04 kg / t of glass;

- iron powder - 1.33 + 0.5 = 1.83 kg / t of glass melt (1.83 - iron content in quartz sand).

The main dyes that give the glass a bronze color in this mixture are metallic selenium, cobalt oxide and iron powder. Shades of bronze glass, which can have light bronze, bronze and dark bronze colors, depend on the concentration of these coloring components.

According to the graph (Fig. 2), the resulting value of the concentration of dyes in the cullet formed on the third day of direct repainting of colorless glass melt into bronze glass melt is 180%, which is 80% higher than the required value. When using this cullet in the maximum possible amount (15% with a cycle duration of 60 days), the excess in terms of the charge is 12%, since 80 * 15% = 12%. Therefore, the maximum reduction in the percentage of coloring components in the respective portions of the charge loaded into the glass furnace together with these portions of cullet is 12%. In this case, the coloring components in the above recipe of the mixture have the following meanings: metallic selenium - 0.132 kg / t glass mass; cobalt oxide - 0.035 kg / t glass; iron powder - 1.33 + 0.28 = 1.61 kg / t of glass melt (1.33 - iron content in quartz sand).

On the second and fifth days after the start of repainting of the glass melt, the maximum excess of the concentration of the coloring components compared to the specified one (level 100% in Fig. 2) is approximately 20%. When using this cullet in a minimum amount (10% with a cycle duration of 90 days), the excess in terms of the charge is 2%, since 20 * 10% = 2%. Therefore, the minimum decrease in the percentage of coloring components in the corresponding portions of the charge loaded with the portions of cullet formed on the second and fifth days is 2%. The amount of coloring components in the mixture with a minimum decrease in their concentration will be as follows: metallic selenium - 0.147 kg / t glass mass; cobalt oxide - 0.039 kg / t of glass melt; iron powder - 1.33 + 0.46 = 1.79 kg / t of glass melt (1.33 - iron content in quartz sand).

Example 2

When the bronze-colored glass melt is repainted back to colorless glass melt six days before the end of the production cycle of colored glass in the glass mass, colorless glass cullet and charge without coloring components begin to be loaded. The reduction of these components in the glass also occurs with a delay, after which the concentration of dyes in the glass melt gradually decreases over a period of about five days to a zero value (Fig. 3).

Consider the maximum and minimum decrease in the concentration of coloring components in the glass with a stepwise change in their concentration from 100% to 0% in the charge being loaded. With uniform removal of the glass melt on the second day after the beginning of the reverse repainting of the glass melt, the average value of the dye concentration in the glass is about 90%, and on the sixth day (the end of the repainting) - 10%. Therefore, for these portions of cullet in the mixture, the concentration of coloring components increases accordingly. A minimal increase in this concentration is achieved if the percentage of cullet used, formed on the second day after the start of reverse repainting, does not exceed 10% (with a cycle time of 90 days). The value of this increase in terms of the charge is determined from the ratio: 10 * 10% = 1%. In this case, the content of the coloring components in the charge will be:

- metal selenium - 0.152 kg / t of glass;

- cobalt oxide - 0.0404 kg / t of glass melt;

- iron powder - 1.33 + 0.52 = 1.85 kg / t of glass melt (1.33 - iron content in quartz sand).

The maximum increase in the concentration of coloring components is required when using 15% cullet (cycle time 60 days) containing about 10% of dyes and formed on the sixth day at the end of reverse repainting. The value of this increase in terms of the charge is determined from a similar ratio: 90 * 15% = 13.5%. The number of coloring components in the charge will be:

- metal selenium - 0.17 kg / t of glass;

- cobalt oxide - 0.045 kg / t of glass;

- iron powder - 1.33 + 0.74 = 2.07 kg / t of glass.

Thus, by varying the concentration of the coloring components in the charge loaded into the glass melting furnace, a stable chemical composition of the glass melt is achieved using portions of cullet with a variable color. In addition, there is a complete disposal of glass waste having different color saturation.

Information sources

1. Levitin L.Ya., Litvin V.I., Tokarev V.D., Yachevsky A.V. Improving the efficiency of glassworks when using cullet in the production of float glass // Glass and Ceramics. 2012. No5. S. 4-7.

2. Gorina I.N., Bondareva L.N., Polkan G.A. et al. Method for the production of heat-absorbing glass "STESA" greenish-blue, blue, amber, bronze, gray, lilac and pink. RF patent for the invention No. 2136619, publ. 09/10/1999

3. The method of disposal of mixed colored cullet in order to obtain amber, green or colorless glass. Patent for invention No. 737868, Australia, publ. September 6, 2001

4. Kondrashev D.V. Method for the production of glass. RF patent for the invention No. 2255908, publ. 07/10/2005

5. Smirnov E.I. The effect of the quality of the charge on the operation of the bath furnace // Glass and Ceramics. 1970. No. 12. S. 7-9.

Claims (1)

Method for the production of colored glass in the mass by preparing a mixture consisting of the main glass-forming and coloring components, loading the mixture and mixed cullet into a glass melting furnace, melting and producing glass, characterized in that the glass is melted with periodic repainting of colorless glass melt, in which it is melted into a glass melting furnace with a capacity of 500-600 tons of glass melt per day, first a charge is loaded during the day with a concentration of coloring components, three times the required value, and tinted glass the battle with stable color accumulated in the previous cycle of repainting the glass melt, after which the amount of coloring components in the charge is reduced to the concentration required for the stable color of the glass, and all the glass produced during the first five days, which has a transitional color with an increased and reduced concentration of coloring components, is stored in five separate bins with a capacity of 500-600 tons each and upon completion of the process of repainting it alternately in the amount of 10-15% of the total mass of the loaded mixture of charge and cullet add 10-15% of cullet with stable color, at the end of cullet with transitional color obtained by repainting colorless glass to color, 10-15% of cullet with stable color is added to 10-15% of cullet with stable color coloring components formed during the reverse repainting of colored glass melt to colorless in the previous cycle of repainting glass melt, and during the entire cycle of stable production of colored glass melt, the duration of which is 60-90 days, in the batches of the charge corresponding to the loaded portions of the cullet with a high concentration of coloring components, reduce the concentration of the dye components by 2-12%, and in the portions of the charge corresponding to the loaded portions of the cullet with a low concentration of the coloring components, increase by 1-13 , 5% concentration of the coloring components, and six days before the end of the production of colored glass in the bulk, a charge containing no coloring components and a colorless cullet accumulated are loaded into a glass melting furnace passed in the previous production cycle
colorless glass, and the colored cullet formed over the past five days with a transitional decreasing concentration of coloring components is similarly stored in five separate bins with a capacity of 500-600 tons and used in the subsequent production cycle of colored glass.

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