High-purity quartz preparation method and quartz tube for low temperature heat exchanger and preparation method
A low-temperature heat exchanger and quartz tube technology, used in glass manufacturing equipment, manufacturing tools, glass molding, etc., can solve the problems of sticky dust and corrosion resistance, increase high temperature viscosity, improve strength, and strong acid resistance. performance effect
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Embodiment 1
[0030] First, prepare 10Kg of quartz powder with a particle size not greater than 40 mesh and a purity of more than 99%. Add 1g of NaNO to the quartz powder 3 Mix well afterwards. Put the mixed quartz powder into a high-temperature furnace and bake at 850°C for 8 hours. After roasting, soak for 10 days in the mixed acid solution with the concentrations of hydrochloric acid, nitric acid and hydrofluoric acid: 3%, 3%, and 3%, respectively. Then wash with a mixture of kerosene, oleic acid, ethanol and water, wherein the mass ratios of kerosene, oleic acid, ethanol and water are: 3:100, 3:100, 5:100 respectively. NH 3 aqueous solution) to control the Ph value to be equal to 7. After dehydration and drying, add 3g of AL(NO 3 ) 3 Mix well afterwards. Then put the mixed mixture into a high-temperature furnace and bake at a temperature of 900° C. for 7.5 hours. After roasting, soak for 10 days in the mixed acid solution with the concentrations of hydrochloric acid, nitric acid...
Embodiment 2
[0032] First, prepare 10Kg of quartz powder with a particle size not greater than 40 mesh and a purity of more than 99%. Add 5g of NaNO to the quartz powder 3 Mix well afterwards. Put the mixed quartz powder into a high-temperature furnace and bake at 900° C. for 8 hours. After roasting, soak for 7 days in the mixed acid solutions with the concentration of hydrochloric acid, nitric acid and hydrofluoric acid respectively: 4%, 6% and 10%. Then wash with a mixture of kerosene, oleic acid, ethanol and water, wherein the mass ratios of kerosene, oleic acid, ethanol and water are: 4:100, 6:100, 12:100 respectively. NH 3 aqueous solution) to control the Ph value to be equal to 7. After dehydration and drying, add 7g of AL(NO 3 ) 3 Mix well afterwards. Then put the mixed mixture into a high-temperature furnace and bake at a temperature of 950° C. for 7.5 hours. After roasting, soak for 8 days in the mixed acid solutions with the concentration of hydrochloric acid, nitric acid...
Embodiment 3
[0034] First, prepare 10Kg of quartz powder with a particle size not greater than 40 mesh and a purity of more than 99%. Add 10g of NaNO to the quartz powder 3 Mix well afterwards. Put the mixed quartz powder into a high temperature furnace and bake at 1000°C for 6.5 hours. After roasting, soak for 4 days in the mixed acid solution with the concentrations of hydrochloric acid, nitric acid and hydrofluoric acid: 6%, 10% and 6% respectively. Then wash with a mixture of kerosene, oleic acid, ethanol and water, wherein the mass ratios of kerosene, oleic acid, ethanol and water are: 5:100, 9:100, 20:100 respectively. NH 3aqueous solution) to control the Ph value to be equal to 7. After dehydration and drying, add 10g of AL(NO 3 ) 3 Mix well afterwards. Then put the mixed mixture into a high-temperature furnace and bake at a temperature of 1050° C. for 6.5 hours. After roasting, soak for 5 days in the mixed acid solution with the concentrations of hydrochloric acid, nitric a...
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