Process and apparatus for making mineral fibres

A technology of minerals and mineral materials, applied in] such as in US2005/00396, some cyclone flow. It can solve problems such as ineffectiveness, achieve uniform residence time, enhance complete combustion, and reduce the amount of carbon monoxide.

Active Publication Date: 2009-10-14
ROCKWOOL AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This pressurized flow is produced using an oxygen lance properly positioned in the feed pipe to mix the copper-containing material with oxygen, but has no effect in a cyclone vessel

Method used

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  • Process and apparatus for making mineral fibres

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Embodiment Construction

[0044] The circulating combustor in the present invention is of the type commonly referred to as a cyclone furnace. Preferably the cyclone furnace is water cooled. The construction of suitable cyclone furnaces is described in various patents, including US Pat.

[0045] The particulate fuel used in the present invention is typically a carbonaceous material, and can be any carbonaceous particulate material with a suitable calorific value. The calorific value may be relatively low, for example as low as 10000 kJ / kg, or even as low as 5000 kJ / kg. Thus, it can be, for example, dried sludge or waste paper. Preferably, the pellet fuel has a high calorific value and may be spent pot linings from the aluminum industry, coal containing waste such as tailings, or pulverized coal.

[0046] In a preferred embodiment the fuel is pulverized coal and may be fine coal, however preferably some of the coal, usually at least 50%, preferably at least 80% and usually all of the coal is obtained ...

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Abstract

The present invention provides a process for making a mineral melt comprising: providing a circulating combustion chamber which contains circulating chamber gases, injecting a stream of particulate fuel into the combustion chamber through a fuel feed pipe, injecting combustion gas into the combustion chamber; mixing the stream of particulate fuel with the combustion gas and with the circulating chamber gases by injecting into the combustion chamber secondary gas, through a secondary gas inlet, wherein the secondary gas is injected adjacent to the stream of particulate fuel and the injection speed of the secondary gas is at least 100 m / s greater than the injection speed of the particulate fuel; suspending particulate mineral material in the circulating chamber gases and combusting the fuel, thereby melting the particulate mineral material and forming a mineral melt and hot exhaust gases; and separating the hot exhaust gases from the melt and collecting the melt.

Description

Background of the invention [0001] The present invention relates to the manufacture of mineral melts by burning a combustible material in the presence of inorganic particulate material, thereby forming the melt. The melt is then fiberized to form mineral fibers. [0002] When the fibers are glass fibres, the melt is usually formed by adding inorganic particulate material to a pre-formed bath in an electric furnace or other pool furnace. The above method is suitable in terms of the chemical characteristics, physical characteristics and manufacturing economy of glass fibers, the typical chemical analysis of the glass fibers in terms of oxide weight is: more than 10% Na 2 O+K 2 O, less than 3% iron in the form of FeO, less than 20% CaO+MgO, more than 50% SiO 2 and less than 5% Al 2 o 3 , often also contain some boron. However, such a system is neither practical nor economical in terms of melting temperature, other physical properties, and economics for the manufacture of ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B3/02C03B5/00C03B37/04F23C3/00
CPCF23C3/008C03B3/026C03B3/023C03B5/005C03B5/235C03B37/04Y02P40/50
Inventor L·E·汉森P·B·汉森L·K·汉森L·博尔隆L·M·延森
Owner ROCKWOOL AS
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