VELCO developed the injection machine UNIDOS-R especially for bad flowing and agglomerating bulk materials. 
On the basis of the well-proven UNIDOS basic model the UNIDOS-R is equipped with a special substructure that have an aeration bottom and an electrically driven stirring unit. This machine is mainly used for the following applications:

  • Disposal of blast furnace flue dust, filter dusts and other steelplants’ residues by injection into the blast furnace. This reduces the operational costs and saves additional costs for waste disposal sites.
  • Injection of ironmongery and small sections serve as cost-saving substitutes for iron ore.
  • Injection of titaniferous sandstone ore (ilmenite) or synthetic titanium carrier (Rutilit – trade name of VENATOR (vormals Sachtleben Chemie GmbH, Duisburg)) into the blast furnace. This leads to an increased service life of the hearth and the furnace walls.
  • Injection of carbon and alloy carriers into shaft furnaces for a quick correction of the iron melt.

In all cases the materials are injected via the tuyeres into the furnace. In case of titanium carriers the material can be fed to the areas to be protected during normal operation. Only few conveying lines are required.

The highest demands are put on the injection installation when processing filter dusts, since these are very cohesive and thus difficult to handle, due to their fineness, suppleness and high share of zinc (up to 30%). This requires a high degree of flexible working conditions, with variable injection rates that may reach from high values up to lower ones as for instance 1 kg/min. All these requirements are fulfilled only by one machine type.

This kind of machine can either  be purchased or rented (according to prior agreement):

  • Injection machine with a volume of 1,2m³
  • Pre-container with a volume of 2,4m³ with vibrating sieve
  • Automatic filling of injection machine UNIDOS-R 1,2 Twin
  • Weighing system type Siemens SIWAREX CS
  • Control cabinet with operation panel, type Siemens TP177 and SPS S7-300
  • Remote control with 20 m of control cable
  • Adjustable conveying capacity (top pressure regulation)
  • Total weight: 2115 kg´s

Injection machine UNIDOS-R with pre-container