Apparatus and method for manufacturing mineral wool as well as a mineral wool product

An apparatus for manufacturing mineral wool, the apparatus comprising:

• means for producing molten mineral material;
• at least one fiberizing device for forming fibers, into which fiberizing device the molten mineral material is fed and by which fibers are formed, the fiberizing device comprising, rotationally arranged around a vertical axis, at least one fiberizing plate having a vertical peripheral edge, into which are formed a plurality of holes through which the molten material is led by centrifugal force to form fibers, wherein to the fiberizing device are arranged elements to produce a vertical flow of blowing medium to be led around the fiberizing plate, the flow causing the fibers to turn downwards and, at the same time, to thin;
• a collection device arranged downstream of the fiberizing device, into which the formed fibers are led and collected into a mat-like material;
• wherein the apparatus includes at least a first fiberizing device and a second fiberizing device, wherein the first fiberizing device is positioned at a first height level and the second fiberizing device is positioned at a second height level, and wherein the first height level is different from the second height level;
• wherein a first channel is arranged between at least one fiberizing plate of the first fiberizing device and the collection device, the first channel for conveying fibers formed by the first fiberizing device to the collection device;
• and
• wherein a second channel is arranged between at least one fiberizing plate of the second fiberizing device and the collection device, the second channel for conveying fibers formed by the second fiberizing device to the collection device.