High-transmittance low-cost glass bottle formula and processing technology thereof

Abstract

The invention belongs to the technical field of glass bottle materials, and particularly relates to a high-transmittance low-cost glass bottle formula which is prepared from the following raw materials in parts by weight: 68-72 parts of low-iron quartz sand, 12-14 parts of sodium carbonate, 6-8 parts of limestone, 3-5 parts of dolomite, 4-6 parts of potassium feldspar, 30-40 parts of cullet, 0.3-0.5 part of a clarifying agent and 0.02-0.05 part of a decolorizing agent. The technical problem that an existing high-transmittance glass bottle is high in cost is solved, the formula takes low-iron quartz sand as a core to optimize the proportion of auxiliary materials, the process focuses on melting and annealing links, and energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of glass bottle materials, and particularly relates to a high-transmittance low-cost glass bottle formula and a processing technology thereof. BACKGROUND

[0002] The high-transmittance glass bottle refers to a special glass container with a visible light transmittance of greater than or equal to 91.5%, and is also called low-iron glass or ultra-white glass. It is praised as the "crystal prince of the glass family" due to its crystal-clear texture. Compared with ordinary glass (with a transmittance of 85-89%), the iron content Fe2O3 of the high-transmittance glass bottle is strictly controlled to be less than 150 ppm (the iron content of ordinary glass is about (800-1200) ppm), and the green color tone is basically eliminated, so that the colorless transparent effect is achieved.

[0003] The existing high-transmittance glass bottle has high raw material cost and processing cost, so that the application range of the high-transmittance glass bottle is limited, and therefore, a low-cost high-transmittance glass bottle needs to be developed to meet the market demand and expand the application range and universality of the high-transmittance glass bottle. SUMMARY

[0004] The application aims to provide a high-transmittance low-cost glass bottle formula and a processing technology thereof, which overcome the shortcomings of the prior art and solve the technical problem of high cost of the existing high-transmittance glass bottle. The formula optimizes the auxiliary material ratio with low-iron quartz sand as the core, and the process focuses on energy consumption reduction in the melting and annealing links.

[0005] To solve the above problems, the technical solution adopted by the application is as follows:

[0006] A high-transmittance low-cost glass bottle formula is prepared from the following raw materials by weight: low-iron quartz sand 68-72 parts, soda ash 12-14 parts, limestone 6-8 parts, dolomite 3-5 parts, potassium feldspar 4-6 parts, cullet 30-40 parts, fining agent 0.3-0.5 parts, and decolorizing agent 0.02-0.05 parts.

[0007] Further, the low-iron quartz sand is treated by magnetic separation and flotation method to ensure that Fe2O3 is less than or equal to 0.015%, the low-iron quartz sand particles are controlled to be 80-120 mesh, the uniformity is greater than 95%, and the moisture is detected by Karl Fischer method and is less than 0.02%.

[0008] Further, the soda ash and limestone are crushed to 100 mesh, and the moisture is controlled to be less than 0.5%.

[0009] Further, the cullet is cleaned and impurities are removed, and is crushed to 5-8 mm, and the proportion of the cullet in the total weight is less than or equal to 40%.

[0010] Further, the fining agent is a composite fining agent, which includes mirabilite and CeO2, and the mass ratio of the CeO2 to the mirabilite is 0.5:30.

[0011] A high-transmittance low-cost glass bottle processing technology, comprising the following steps:

[0012] S1, raw material pretreatment: crushing quartz sand, soda ash and other raw materials to 100-120 mesh, drying to moisture ≤0.5%, avoiding bubble generation during melting, and improving light transmittance uniformity;

[0013] S2, raw material preheating, placing the material processed in S1 to an environment of 800-900 DEG C, and preheating for 1-1.5 h;

[0014] S3, melting link: melting in a pool furnace at 1450-1500 DEG C, controlling the holding time to be 1.5-2 h, shortening the high-temperature residence time to reduce energy consumption, and at the same time ensuring the clarification and homogenization of the glass liquid;

[0015] S4, forming process: adopting mold forming (pressing or blowing), and selecting heat-resistant alloy material for the mold to improve the reuse rate of the mold and reduce the mold cost loss; the forming temperature is controlled to be 1100-1200 DEG C, and the bottle shape is ensured to be regular;

[0016] S5, annealing treatment: annealing in an annealing furnace at 300-500 DEG C for 30-60 min, slowly cooling to room temperature, eliminating internal stress, avoiding glass bottle explosion, and reducing the waste rate.

[0017] Further, the mold forming is pressing forming or blowing forming.

[0018] Further, full-oxygen combustion is adopted in the pool furnace in the melting link.

[0019] Compared with the prior art, the application has the following beneficial effects:

[0020] 1, core raw material: low-iron quartz sand (Fe2O3 content ≤0.05%) is selected, iron ions are reduced, and the absorption of light is reduced, which is the key to high light transmittance;

[0021] 2, auxiliary material optimization: soda ash (Na2CO3) is used to replace part of high-valence potassium feldspar, and limestone (CaCO3) and dolomite are used to adjust the chemical stability, so that the raw material cost is reduced;

[0022] 3, clarifying agent selection: a small amount of carbon powder is added to the mirabilite to compound the clarifying agent (CeO2), and expensive antimony oxide is replaced, gas is generated at 850-900 DEG C, and the bubbles in the glass liquid are removed. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of the present application.

[0024] Embodiment one

[0025] A high-transmittance low-cost glass bottle formula is made from the following raw materials by weight: low-iron quartz sand 68-72 parts, soda ash 12-14 parts, limestone 6-8 parts, dolomite 3-5 parts, potassium feldspar 4-6 parts, cullet 30-40 parts, fining agent 0.3-0.5 parts, and decoloring agent 0.02-0.05 parts.

[0026] Further, the low-iron quartz sand is treated by magnetic separation and flotation method to ensure that Fe2O3≤0.015%, the low-iron quartz sand particles are controlled to be 80-120 mesh, the uniformity is >95%, and the moisture is detected by Karl Fischer method, and the moisture is <0.02%.

[0027] Further, the soda ash and limestone are crushed to 100 mesh, and the moisture is controlled to be <0.5%.

[0028] Further, the cullet is cleaned and impurities are removed, and is crushed to 5-8 mm, and the proportion of the cullet in the total weight is ≤40%.

[0029] Further, the fining agent is a composite fining agent, the composite fining agent includes mirabilite and CeO2, and the mass ratio of the CeO2 to the mirabilite is 0.5:30.

[0030] Embodiment two

[0031] A high-transmittance low-cost glass bottle processing process includes the following steps:

[0032] S1, raw material pretreatment: crushing quartz sand, soda ash and other raw materials to 100-120 mesh, drying to moisture ≤0.5%, to avoid bubbles during melting and improve light transmittance uniformity;

[0033] S2, raw material preheating, placing the materials processed in S1 to an environment of 800-900°C, and preheating for 1-1.5h;

[0034] S3, melting link: melting in a pool kiln at 1450-1500°C, controlling the holding time to be 1.5-2 hours, shortening the high-temperature residence time to reduce energy consumption, and at the same time ensuring the clarity and homogenization of the glass liquid;

[0035] S4, forming process: using mold forming (pressing or blowing), mold is made of heat-resistant alloy material, improving mold reuse rate and reducing mold cost loss; the forming temperature is controlled at 1100-1200℃, ensuring the regularity of bottle shape;

[0036] S5, annealing treatment: in the annealing kiln, heat preservation at 300-500℃ for 30-60 minutes, slow cooling to room temperature, eliminating internal stress, avoiding glass bottle explosion and reducing the scrap rate.

[0037] Further, the mold forming is pressing forming or blowing forming.

[0038] Further, the melting link adopts full-oxygen combustion in the pool kiln.

[0039] Finished product detection

[0040] Transmittance detection: finished product ≥91.5% (3-5% higher than ordinary glass)

[0041] Stress detection: no obvious stress stripe under polarized light

[0042] Scrap rate control: <3%, the key is the purity of raw materials and process stability.

[0043] Final effect: transmittance ≥91.5% (close to crystal texture), cost reduction of 25-35%, suitable for high-end packaging, medicine, cosmetics and other fields.

[0044] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of the equivalent elements of the claims are intended to be embraced in the present application. Any mark in the claims should not be considered as limiting the involved claims.

Claims

1. A high-transmittance, low-cost glass bottle formulation, characterized in that: It is made from the following raw materials in parts by weight: 68-72 parts low-iron quartz sand, 12-14 parts soda ash, 6-8 parts limestone, 3-5 parts dolomite, 4-6 parts potassium feldspar, 30-40 parts crushed glass, 0.3-0.5 parts clarifying agent, and 0.02-0.05 parts decolorizing agent.

2. The high-transmittance, low-cost glass bottle formulation according to claim 1, characterized in that: The low-iron quartz sand is produced by magnetic separation and flotation to ensure that Fe2O3 ≤ 0.015%, the particle size of the low-iron quartz sand is controlled at 80-120 mesh, the uniformity is > 95%, and the moisture content is < 0.02% as determined by Karl Fischer method.

3. The high-transmittance, low-cost glass bottle formulation according to claim 1, characterized in that: The soda ash and limestone are pulverized to 100 mesh, and the moisture content is controlled to be <0.5%.

4. The high-transmittance, low-cost glass bottle formulation according to claim 1, characterized in that: The broken glass is cleaned and impurities are removed, and it is crushed to 5-8mm, with the broken glass accounting for ≤40% of the total weight.

5. The high-transmittance, low-cost glass bottle formulation according to claim 1, characterized in that: The clarifying agent is a composite clarifying agent, which includes sodium sulfate and CeO2, wherein the mass ratio of CeO2 to sodium sulfate is 0.5:

30.

6. A high-transmittance, low-cost glass bottle processing technology, characterized in that: Includes the following steps: S1. Raw material pretreatment: Crush raw materials such as quartz sand and soda ash to 100-120 mesh and dry them to a moisture content of ≤0.5% to avoid the generation of bubbles during melting and improve the uniformity of light transmission. S2. Raw material preheating: Place the material processed in S1 in an environment of 800-900℃ and preheat for 1-1.5 hours. S3. Melting process: Melt at 1450-1500℃ in a tank furnace, control the holding time to 1.5-2 hours, shorten the high-temperature residence time to reduce energy consumption, and at the same time ensure the clarification and homogenization of the glass melt; S4. Molding process: Molding is adopted (pressing or blowing). The mold is made of heat-resistant alloy material to improve the mold reuse rate and reduce mold cost loss; the molding temperature is controlled at 1100-1200℃ to ensure the bottle shape is regular. S5. Annealing treatment: Hold the glass bottles at 300-500℃ in an annealing furnace for 30-60 minutes, then slowly cool them to room temperature to eliminate internal stress, prevent the glass bottles from cracking, and reduce the scrap rate.

7. The high-transmittance, low-cost glass bottle processing technology according to claim 6, characterized in that: The molding process is either compression molding or blow molding.

8. The high-transmittance, low-cost glass bottle processing technology according to claim 6, characterized in that: The melting process uses oxygen combustion in the furnace.