A mineral wool spinner comprises a cobalt-chromium alloy or nickel-chromium alloy spinner alloy comprising:

[00001]$\mathrm{Cr}20\mathrm{wt}\%\mathrm{and}40\mathrm{wt}\%:$$C0.4\mathrm{wt}\%\mathrm{and}1.8\mathrm{wt}\%$$\mathrm{Si}1.\mathrm{wt}\%$

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.

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.

An apparatus for and a method of manufacturing mineral wool are disclosed, wherein multiple fiberizing devices form discrete groups of mineral wool fibers that are separately conveyed to a common collection device. When the groups of mineral wool fibers are conveyed through separate channels, the channels can differ by shape and/or size, as well as location relative to the collection device.

An apparatus for and a method of manufacturing mineral wool are disclosed, wherein multiple fiberizing devices form discrete groups of mineral wool fibers that are separately conveyed to a common collection device. When the groups of mineral wool fibers are conveyed through separate channels, the channels can differ by shape and/or size, as well as location relative to the collection device.

A fibre forming device for fabricating mineral fibres, includes a fibre forming spinner wheel pierced to enable centrifugal fabrication of the fibres, the fibre forming device including at least one annular burner producing an annular gas flow to stretch the fibres and an evacuation system for evacuating smoke created by the burner, the device further including a system adapted to vary the temperature of the spinner wheel, the temperature variation system being a device for circulation of air between the annular burner and the evacuation system to control the smoke evacuation flow.

A fibre forming device for fabricating mineral fibres, includes a fibre forming spinner wheel pierced to enable centrifugal fabrication of the fibres, the fibre forming device including at least one annular burner producing an annular gas flow to stretch the fibres and an evacuation system for evacuating smoke created by the burner, the device further including a system adapted to vary the temperature of the spinner wheel, the temperature variation system being a device for circulation of air between the annular burner and the evacuation system to control the smoke evacuation flow.

A system for crosslinking a continuous mat of mineral and/or plant fibers, includes a crosslinking oven for the mat including at least one heating box, each heating box being connected to a combustion chamber. The crosslinking system further includes an injection system arranged outside the crosslinking oven and configured to inject hot air into at least one combustion chamber of a heating box, the hot air thus injected replacing a given fraction of hot air produced by at least one burner attached to the said at least one combustion chamber.

Described herein is a method of smelting to form an inorganic fiber, the method comprising: a) introducing a silicomanganese slag and a smelting additive into a furnace, the smelting additive comprising biochar; b) smelting the silicomanganese slag in the presence of the smelting additive into a silicomanganese metal and a smelting byproduct; and c) flowing the smelting byproduct from the furnace from a first outlet to a fiber spinning apparatus; and step d) processing the smelting byproduct by the fiber spinning apparatus to form the inorganic fiber.

Described herein is a method of smelting to form an inorganic fiber, the method comprising: a) introducing a silicomanganese slag and a smelting additive into a furnace, the smelting additive comprising biochar; b) smelting the silicomanganese slag in the presence of the smelting additive into a silicomanganese metal and a smelting byproduct; and c) flowing the smelting byproduct from the furnace from a first outlet to a fiber spinning apparatus; and step d) processing the smelting byproduct by the fiber spinning apparatus to form the inorganic fiber.