PLASMA METHOD FOR MINERAL WOOL MANUFACTURING AND PLANT FOR ITS IMPLEMENTATION Russian patent published in 2014 - IPC C03B37/06 

FIELD: machine building.

SUBSTANCE: plasma method of mineral wool manufacturing involves loading of ash and slag waste of thermal power plants to a reactor, melting of the raw material in the reaction chamber of the reactor, flowing of the melt to a blowing mechanism and stretching of fibres by centrifugal blowing with further feeding of the fibres to a settling chamber, removal of the fibres from the settling chamber. Basalt rock is also used as raw material for mineral wool production. The raw material is molten by alternating current in a plant - plasma three-phase series reactor. The raw material is loaded into the reactor by even division into three flows fed to the burning zones of each of the three plasma arcs respectively, the whole volume of the melt is mixed by uniform magnetic field, temperature and fluidity of the melt are regulated by passing the direct current through the circuit electrode-melt-tap. Partial or complete drainage of the melt is regulated by changing the height of lifting/lowering of the graphite rod electrode set in the centre of the reactor's reaction chamber, melting of the raw material that is highly spuming at melting and mixing, is carried out with the installation of a circular panel between the cover and the side walls of the reactor. The melt is drained from the reactor in a mechanised way with accurate and fast response to the change of melt characteristics including complete closing of the tap hole without disconnection of the graphite rod electrode and the tap from the power supply source operated in a DC mode, the melt is blown into fibres by a blowing unit which is blown round by an air flow in the longitudinal direction.

EFFECT: improved reliability of the plant performance and better homogeneity of fibres by shape and length.

2 cl, 2 ex, 4 dwg