The high whiteness in the high white glass wine bottle refers to the good whiteness and high transparency of the glass. In addition to the proportion of ingredients and the quality of raw materials, the whiteness of high-white glass wine bottles will also be affected by the production process. So do you know what factors affect the whiteness of high white glass wine bottles? Here are 5 major factors that affect high white glass wine bottles!
1. Melting temperature
When the iron content and the amount of selenium powder are fixed, the melting temperature is increased, and the decolorization quality of the glass will decrease. The reason is that increasing the melting temperature will cause the selenium powder to volatilize and increase the dosage. According to actual experience, when the melting temperature is above 1450°, the dosage of selenium powder will increase by about 5% for every 10°C increase.
2. Annealing temperature
For glass decolorized with selenium powder, if the annealing process is not well controlled, the product quality will be affected, and even discoloration will occur. A glass wine bottle manufacturer found in the production process that the glass bottle was light rose red after annealing, and the bottle on the mesh belt that conveyed the bottle was not directly taken down through the annealing furnace but did not have this color. Later, by searching for the reason, it was found that the temperature of the annealing furnace was too high, and the discoloration phenomenon disappeared immediately after adjusting to the normal annealing temperature. Therefore, the temperature of the annealing furnace must be tested on time during production, otherwise the fuel will be wasted and the quality of the bottle will be affected.
3. Fuel properties
In addition to raw materials, fuel is an important part of the production of high-white glass wine bottles. Many glass wine bottle manufacturers use electric melting furnaces or natural gas to reduce the pollution of glass liquid. However, some companies have used floor oil and crude oil in order to reduce costs. Because the floor oil contains 0.3% ash, the ash contains iron oxide, and the moisture content in the oil is too large, resulting in unstable oil pressure and short flame duration. , the material color has been unstable, the decolorizing agent must be adjusted frequently, which brings many adverse effects to the production.
4. Kiln atmosphere
From the perspective of the decolorization principle of glass, the kiln is in an oxidizing atmosphere, which is conducive to the transformation of fe2+ (two positively charged iron ions) with strong coloring ability into positive ferric ions with weak coloring ability under the action of oxidants, thereby strengthening the Decolorization. At the same time, the amount of selenium powder is reduced, and the cost is reduced. However, when the oxidizing atmosphere is too strong, the purple elemental selenium will be oxidized to colorless selenium dioxide and the decolorization ability will be weakened. Generally, the atmosphere in the kiln should be controlled to be a weak oxidizing atmosphere.
Combustion-supporting air volume, batch moisture, fuel properties and atomization pressure will all have an impact on the kiln atmosphere. According to practical experience, when the natural air intake or air volume is small, the kiln atmosphere fluctuates greatly and is easy to reduce, which will reduce the sulfur dioxide and sulfur trioxide in the glass to sulfide, and then react with iron and selenium in the glass frit to produce sulfide. Iron and sulfur selenide, thereby reducing the Baidu of glass. The combustion-supporting air volume is increased to make it strong oxidizing, which avoids the defects of large fluctuation of gas furnace atmosphere and strong reducibility, and the material color effect is pure and stable.
5. The influence of the output
When the discharge volume decreases, the volatilization of the selenium powder increases due to the prolonged time of the batch material in the kiln. Therefore, when the discharge volume increases, it is conducive to the color development of the selenium powder, and the stable discharge volume is conducive to the stability of decolorization. When the amount fluctuation is not more than 5%, the effect on decolorization is small, and it is not necessary to adjust the amount of decolorizing agent.