A kind of ultra-clear float glass with blue edge color and production method thereof

Abstract

The invention provides an ultra-clear float glass with blue edge color and a production method thereof, belonging to the technical field of float glass. The ultra-clear float glass with blue edge color includes the base glass part and the colorant part, wherein the base glass components include: SiO 2 :65‑75wt%, Na 2 O: 10‑20wt%, CaO: 5‑15wt%, MgO: 0‑5wt%, Al 2 o 3 : 0‑5 wt%, K 2 O: 0‑0.1%, SO 3 : 0‑0.2%; colorant part includes by weight of base glass: Fe 2 o 3 : 0‑0.015 wt%, TiO 2 : 0‑0.01wt%; Co0: 0‑2ppm, MnO 2 : 0‑2ppm, the preparation process includes iron removal, desulfurization and other processes. The invention has the advantages of greatly improving the stability and color uniformity of the float glass, and the produced ultra-white float glass with blue edge color has a pleasant light blue color.

Description

technical field [0001] The invention belongs to the technical field of float glass, and relates to an ultra-clear float glass with blue edge color and a production method thereof. Background technique [0002] Ultra-clear float glass is a high-grade variety of glass products with high light transmittance and high transparency. It is mainly used in interior and exterior decoration of high-end buildings, electronic products, high-end car glass, solar cells, high-end gardening buildings, and high-end glass furniture. , Various imitation crystal products and other industries. The development and application of solar energy provides a broader development space for the development of ultra-clear glass, because the light transmittance of ultra-clear glass is above 91%. [0003] According to the definition of ultra-clear float glass in the "Building Materials Industry Standards of the People's Republic of China", it is produced by float glass production technology, and Fe in the co...

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Problems solved by technology

In terms of reducing or eliminating the yellow-green sensory defects of glass, it requires that Glauber's salt should be added as a flux in the raw materials, and the remaining sulfur in the glass should be less than or equal to 0.2%, which is a traditional glass production process. It is difficult to achieve; it also shows that CeO can be added to the raw material when the sulfur content is too low 2 , sodium nitrate and other components to ensure the redox rate, but CeO 2 The existence of the glass will cause fluorescence when exposed to ultraviolet light, and the use of sodium nitrate will also cause the generation of NOx and treatment measures have to be taken to meet the government's restrictions on NOx emissions; in order to ensure good melting quality, When a small amount or no sulfur-containing co-solvent is added, it is achieved by feeding pure oxygen into the kiln to improve the quality of fuel combustion. These measures will undoubtedly lead to an increase in production costs

In another measure, in order to ensure that the glass tempered hot bending does not appear "fogging", it is necessary to periodically add a small amount of pure iron to the molten tin to replace the oxygen and sulfur in the molten tin, and this measure will cause polysulfide The formation of iron causes the glass to have yellow-green sensory defects. At this time, the molten tin is cleaned regularly to eliminate the iron in the molten tin. This will also increase the production cost and is not conducive to the continuous stability of the glass color.

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