Method of producing molten glass and system therefor, including providing a glass melting furnace configured to melt a glass sample, the glass sample including glass batch material including soda ash, or cullet or post-consumer cullet, or any combination of batch material, cullet and post-consumer cullet. The method includes introducing glass sample into a chamber of a rotary drum heat exchanger having at least one heat exchange tube; introducing the exhaust gas into the tube; causing a transfer of heat from the exhaust gas in the tube to the glass sample in the chamber to volatilize any organic impurities in the glass sample, heat the glass sample and 10 evaporate water from the glass sample to dry it, the evaporated water forming water vapor in the chamber; contacting the dried sample with the water vapor; and discharging the dried sample from the rotary drum heat exchanger and introducing it into the furnace.

Provided herein are processes for preparing glass powder product, the process including steps of: providing a crushing waste glass: sorting the crushed waste glass in a primary air classifier to provide a first stream and a reject stream, the first stream comprising a pulverized glass within a predetermined first particle size range and the reject stream comprising crushed waste glass excluded from the first stream: separating the reject stream based on size to provide a coarse stream and a fine stream, the fine stream having a predetermined second particle size range; and milling the first and fine streams to provide the glass powder product. Glass powder products, as well as systems for producing such glass powder products, are also provided.

An acoustical tile having a wet laid mineral fiber basemat, a non-woven porous fiberglass veil adhered to the basemat and covered with a light reflecting air permeable coating, at least 90% of the weight of the basemat comprising mineral wool and binder, a weight of the binder being less than 1/11 of the weight of the mineral fiber, the basemat having a density of between about 11.4 and about 14.2 lbs/cubic foot, the mineral fiber having an average diameter of between 4.5 and 8.3 microns, the composite of the basemat, veil and coating exhibiting good NRC and CAC performance values.

Methods of creating a batch of recycled glass from mixed color glass cullet. In one embodiment, the method includes receiving at a glass plant a weight and color composition percentage of a first batch of mixed color cullet. The glass plant also receives a weight and color composition percentage of a second batch of mixed color cullet. The weight and color composition percentage of the first batch and the second batch are combined to generate a combined weight and composition percentage. The combined weight and composition are percentage are used to generate, automatically at a glass plant, a formulation to produce glass of a desired color.

A process for making a colored composite pavement structure comprising silylated glass aggregate particles and a polymeric binder composition is disclosed. Systems and methods are also disclosed for providing a colored composite material that cures into a pavement structure. In one embodiment, a colorant concentrate is provided by combining an inorganic colorant with a portion of a first component of a polymeric binder composition. The colorant concentrate can then be combined with the first and second components of the polymeric binder composition to provide a colored polymeric binder composition. The colored polymeric binder composition may then be applied to silylated glass aggregate particles to provide a colored composite material that cures into a pavement structure.

A method for vitrification of arsenic and antimony, comprising substituting oxygen to sulfur on thiosalts, incorporating resulting sodium arsenate and sodium antimonate into a sodium silicate glass-forming mixture and vitrifying the sodium silicate glass-forming mixture into a resulting glass sequestering the arsenic and antimony.

Provided herein are processes for preparing glass powder product, the process including steps of: providing a crushing waste glass; sorting the crushed waste glass in a primary air classifier to provide a first stream and a reject stream, the first stream comprising a pulverized glass within a predetermined first particle size range and the reject stream comprising crushed waste glass excluded from the first stream; separating the reject stream based on size to provide a coarse stream and a fine stream, the fine stream having a predetermined second particle size range; and milling the first and fine streams to provide the glass powder product. Glass powder products, as well as systems for producing such glass powder products, are also provided.

A process for making a colored composite pavement structure comprising silylated glass aggregate particles and a polymeric binder composition is disclosed. Systems and methods are also disclosed for providing a colored composite material that cures into a pavement structure. In one embodiment, a colorant concentrate is provided by combining an inorganic colorant with a portion of a first component of a polymeric binder composition. The colorant concentrate can then be combined with the first and second components of the polymeric binder composition to provide a colored polymeric binder composition. The colored polymeric binder composition may then be applied to silylated glass aggregate particles to provide a colored composite material that cures into a pavement structure.

An invention is provided for creating smoothed, heat-treated glass fragments. The invention includes placing a plurality of heat-treated glass fragments into a tumbling or vibrating apparatus. Each heat-treated glass fragment is formed from glass that has been heated to a temperature of at least 1000 Fahrenheit and rapidly cooled to a temperature below 700 Fahrenheit. The plurality of glass fragments are then tumbled or vibrated for a predetermined period of time such that surfaces of the heat-treated glass fragments are smoother than prior to tumbling. The glass fragments are thereafter removed from the tumbling apparatus, resulting in smoothed, heat-treated glass fragments that are suitable for direct handling without hand protection.

The invention provides a white sintered glass-ceramic tile and a method for preparing the white sintered glass-ceramic tile. The white sintered glass-ceramic tile is a single fired tile with a glazed glass-ceramic layer and a porous glass-ceramic layer, wherein each layer is prepared using same starting raw materials. The method includes milling the starting raw materials to obtain a homogenous mixture. The homogenous mixture is melted and poured in water to obtain glass frits. The glass frits are milled and thereafter, sieved to obtain glass frit powder with particle size of below 100 micron (m). A mixture of the glass frit powder and one or more foaming agents is cold pressed to form a porous glass-ceramic layer. Thereafter, the glass frit powder is deposited on the porous glass-ceramic layer to obtain a glazed glass-ceramic layer. Finally, both the layers are fired together.