The invention discloses a preparation method of a rock wool thermal-insulation material and a rock wool, belonging to the field of manufacturing of thermal-insulation materials. The method comprises the following steps: (1) raw material processing; (2) material fiberization: centrifugating the molten solution in the step (1) to form fibers while spraying 35-55kg of phenol aldehyde resin to every ton of fibers; (3) wool collection: collecting the fibers formed by centrifugation in the step (2); (4) superposition: converting the fibers collected in the step (3) into sheet-shaped fiber ribbons; (5) curing: curing the superposed fiber ribbons in the step (4); (6) compression: compressing the superposed fiber ribbons while curing to obtain a rock wool thermal-insulation board; and (7) cutting and packaging. The rock wool has the advantage of low content of slag balls (with the particle size of greater than 0.25mm), favorable thermal-insulation effect and better performance indexes than the prior art.

Preparation method of rock wool thermal-insulation material and rock wool

A method for heating glass batch materials before use in a glass melting furnace, the
glass batch material comprising solid particle raw materials or cullet, or a mixture of
the two, the method comprising the steps of:
 a) providing a bulk quantity of glass batch material in a hopper; b) providing at least one gas flow tunnel through the bulk quantity of batch
material, at least a portion of the surface of the tunnel consisting of a
surface of the batch material; c) passing glass furnace exhaust gases through the tunnel; d) providing an electrically conductive electrode within the tunnel; e) providing an electrically conductive surface in contact with the batch
material; and f) applying an electrical potential difference between the electrode of step
d) and the surface of step e) of sufficient magnitude to produce corona
discharge inside the tunnel, the corona discharge consisting of a flow
of gaseous ions through the furnace gases, at least a portion of the
gaseous ions flowing into the glass batch material.

Electrostatic batch preheater

A method and apparatus for treating cullet before use as a raw material in a glass manufacturing process is disclosed. The method includes providing a bed of cullet; passing hot gases through the bed, the quantity and temperature of gases being sufficient to pyrolyze odor creating impurities within the bed of cullet; entraining volatile products of pyrolysis into gases leaving the moving bed; heating the gases leaving the bed to oxidize odor creating impurities; and discharging the gases to the atmosphere. The apparatus includes a housing containing a moving bed of cullet; a source of hot gases which permits the gases to pass through the moving bed of cullet to pyrolyze odor creating impurities within the cullet and entrain volatile products of pyrolysis into gases leaving the moving bed; and an incinerator to remove odor creating impurities from gases leaving the moving bed.

Method and apparatus which removes odor and pollutants when preparing cullet for use in an electrostatic bed filter

Method which removes odor and pollutants when preparing cullet for use in an electrostatic bed filter

An apparatus and a process for the continuous production of mineral wool nonwovens in the nonwoven formation process on the drums of the accumulating conveyors arranged at the lower end of a chute. Several fiberization units (1, 2, 3, 4) communicate with a chute (9) for the formation of a nonwoven (14). The fibres are deposited under the influence of suction pressure onto the curved surface of the accumulating conveyor (10, 11). At least one of the drum-shaped accumulating conveyors (10) is designed to swivel around a pivot (23) essentially arranged perpendicular to the flow direction (22) of the mineral wool such and to the extent that a discharge gap (21) can be adjusted to a width corresponding to the thickness of the nonwoven (14) to be formed.

Apparatus for the continuous production of mineral wool nonwovens

A process of melting silicate raw materials includes the steps of using the tank exhaust gases to heat the combustion air, using the tank exhaust gases to preheat a mixture of raw materials, removing acid gaseous aggressive media from the tank exhaust gases, then using the tank exhaust gases to preheat the combination air Because the acid gaseous aggressive media are removed from the tank exhaust gases before the tank exhaust gases are used to preheat the combustion air, more heat can be withdrawn from the tank exhaust gases than was heretofore possible, since there is no danger of acid condensation even when the tank exhaust gases are cooled to near ambient temperature

Method of melting raw materials

A method wherein the combustion air is preheated in two steps and the raw materials are preheated in one step, and dust-like and/or gaseous constituents of the combustion gases from the tank furnace such as inorganic fluorides, are removed after the raw materials have been prewarmed. The combustion gases from the tank furnace, at a temperature of, for example, 1400 DEG C, first reach a recuperative heat exchanger (5), where their temperature drops to from about 600 to 650 DEG C, while the temperature of the combustion air, which has already been prewarmed to from 130 to 180 DEG C, is increased to about 950 DEG C. By heat exchange with the raw materials in their tank (12), the temperature of the combustion gases from the tank furnace drops to from 300 to 350 DEG C, after which they are fed to a cleaning unit (21), from where they are used to prewarm the combustion air in a regenerative heat exchanger (23). This reduces the temperature of the combustion gases to about 150 DEG C, but the prior removal of aggressive, gaseous impurities means that there is no fear of acid being produced in the heat exchanger (23) or in the chimney (24). Some impurities, such as fluorine compounds, are already filtered out on heat exchange with the raw materials and enter the melting end (1) together with the raw materials. The bonding of the impurities to lime-containing filter particles takes place in the cleaning unit (21), and the filter particles are themselves regenerated by abrasion of surface layers, it likewise being possible for the abraded material to be fed back to the melting end (1) so that substances such as fluorine can be substantially recycled into the melt and the melt temperature can thus be kept low, which in turn reduces the fluorine content in the combustion gases from the tank furnace. The cleaning unit (21) is divided into chambers, which can be selectively sealed off from the combustion gases in order to regenerate the time-containing filter particles. … …

Method and apparatus for melting siliceous raw materials, especially for the manufacturing of mineral wool

Verfahren zum erschmelzen von silikatischen rohstoffen, insbesondere zur herstellung von mineralwolle, sowie vorrichtung zur vorwaermung des rohstoffgemenges und reinigungseinrichtung fuer die wannenabgase zur durchfuehrung des verfahrens

Wilfried Naber

Papers

Method of melting raw materials

Method and apparatus for melting siliceous raw materials, especially for the manufacturing of mineral wool

Verfahren zum erschmelzen von silikatischen rohstoffen, insbesondere zur herstellung von mineralwolle, sowie vorrichtung zur vorwaermung des rohstoffgemenges und reinigungseinrichtung fuer die wannenabgase zur durchfuehrung des verfahrens