An electric glass hot shop system is described herein that has at least one electrically powered heating unit (e.g., electric furnace, electric glory hole, electric pipe warmer, electric color box, electric annealer, electric crucible kiln) used in the processing of glass.

An electric glass hot shop system is described herein that has at least one electrically powered heating unit (e.g., electric furnace, electric glory hole, electric pipe warmer, electric color box, electric annealer, electric crucible kiln) used in the processing of glass.

Methods and apparatus provide for: feeding glass batch material into a plasma containment vessel in such a way that the glass batch material is dispensed as a sheet of glass batch material particles; directing one or more sources of plasma gas into the inner volume of the plasma containment vessel in such a way that the plasma gas enters the plasma containment vessel as at least one sheet of plasma gas; and applying an alternating electric field to facilitate production of a plasma plume within the inner volume of the plasma containment vessel, where the plasma plume is of dimensions sufficient to envelope the sheet of glass batch material particles, and is of sufficient thermal energy to cause the glass batch material to react and melt thereby forming substantially homogeneous, spheroid-shaped glass intermediate particles.

In illustrative implementations of this invention, a crucible kiln heats glass such that the glass becomes or remains molten. A nozzle extrudes the molten glass while one or more actuators actuate movements of the nozzle, a build platform or both. A computer controls these movements such that the extruded molten glass is selectively deposited to form a 3D glass object. The selective deposition of molten glass occurs inside an annealing kiln. The annealing kiln anneals the glass after it is extruded. In some cases, the actuators actuate the crucible kiln and nozzle to move in horizontal x, y directions and actuate the build platform to move in a z-direction. In some cases, fluid flows through a cavity or tubes adjacent to the nozzle tip, in order to cool the nozzle tip and thereby reduce the amount of glass that sticks to the nozzle tip.

A method of and an arrangement for recycling mineral wool waste to mineral wool production includes at least one melting furnace for melting virgin mineral wool raw material, the melting furnace including an inlet for virgin mineral wool raw material and an outlet for molten mineral wool material, a production line connected to the outlet for molten mineral wool material for producing a mineral wool product from the molten mineral wool material. The production line includes a curing oven, a fluidized bed reactor including an exhaust gas duct, an inlet for predetermined primary fuel, an inlet for predetermined bed material, and an outlet for an ash material, the ash material including bottom ash discharged via a bottom outlet from the fluidized bed reactor or fly ash separated by a particle separator from exhaust gas in the exhaust gas duct or a mixture of the bottom ash and the fly ash.

Glass melting furnaces include a melting vessel that includes a floor, a feeding mechanism configured to feed raw materials into the melting vessel, a heating mechanism configured to convert raw materials fed into the melting vessel into molten glass, and a layer comprising an electrical resistivity enhancing material that is configured to diffuse into at least one layer of the floor that comprises a refractory ceramic material.

Glass melting furnaces include a melting vessel that includes a floor, a feeding mechanism configured to feed raw materials into the melting vessel, a heating mechanism configured to convert raw materials fed into the melting vessel into molten glass, and a layer comprising an electrical resistivity enhancing material that is configured to diffuse into at least one layer of the floor that comprises a refractory ceramic material.

An electric induction system and method is provided for induction heating and melting of basalt charge for the production of molten process basalt that can be used for molten basalt processes that produce basalt articles of manufacture including cast basalt articles and continuous basalt casting processes for producing basalt articles such as fibers and filaments.

Methods and apparatus provide for: feeding glass batch material into a plasma containment vessel in such a way that the glass batch material is dispensed as a sheet of glass batch material particles; directing one or more sources of plasma gas into the inner volume of the plasma containment vessel in such a way that the plasma gas enters the plasma containment vessel as at least one sheet of plasma gas; and applying an alternating electric field to facilitate production of a plasma plume within the inner volume of the plasma containment vessel, where the plasma plume is of dimensions sufficient to envelope the sheet of glass batch material particles, and is of sufficient thermal energy to cause the glass batch material to react and melt thereby forming substantially homogeneous, spheroid-shaped glass intermediate particles.

The invention relates to an electric glass furnace (100) comprising a tank (110) with a cold or semi-cold top and also electrodes (150) for melting raw materials (130) introduced into the tank and thereby obtaining a bath (120) of molten material, the tank having a side wall (112) comprising an opening (113) configured to allow the molten material to flow out of the tank. The furnace additionally has means referred to as delaying means (170, 180), which are at least partially immersed in the bath and are positioned in vertical alignment with the opening and in proximity to the side wall of the tank and are configured to increase the dwell time, in the tank, of the raw materials that are introduced in proximity to the delaying means.