Granules Containing Agglomerated Bulk Material

Abstract

The invention relates to granules composed of agglomerated reactive bulk material and a binder matrix, the binder matrix comprising as binder an organic or inorganic salt.

1 . Granules containing at least one agglomerated reactive bulk material and a binder matrix, wherein the binder matrix contains at least one organic or inorganic salt as the binder. 
     
     
         2 . Granules according to  claim 1 , wherein the melting point of the binder is lower than the melting point of the reactive bulk material. 
     
     
         3 . Granules according to  claim 1 , wherein the melting point of the binder is below 600° C., preferably in the range from 100° C. to 600° C. 
     
     
         4 . Granules according to  claim 1 , wherein the bulk material contains a reactive lime-based material, preferably quicklime, CaO, calcined dolomite, MgO.CaO, or calcined magnesite, MgO, or mixtures of these substances or mixtures with the respective carbonates or other input materials. 
     
     
         5 . Granules according to  claim 1 , wherein the binder contains sodium, calcium, boron, aluminium, iron, fluorine, nitrogen, carbon and/or oxygen, preferably in the form of chemical compounds. 
     
     
         6 . Granules according to  claim 1 , wherein the binder contains calcium nitrate, sodium fluoride, cryolite, boron trioxide, aluminium, and/or iron fluoride. 
     
     
         7 . Granules according to  claim 1 , wherein the bulk material has an average grain size of 0 to 100 μm, and/or a D50 value of 40 to 60 μm. 
     
     
         8 . Granules according to  claim 1 , wherein the granules have a grain size of 1 to 6 mm or above. 
     
     
         9 . Granules according to  claim 1 , wherein the proportion of bulk material in the granules is in the range from 85 to 99%. 
     
     
         10 . Granules according to  claim 1 , wherein the proportion of binder in the granules is in the range from 1 to 15%. 
     
     
         11 . Granules according to  claim 1 , wherein the ratio of bulk material to binder varies in the range from 1:5 to 1:100. 
     
     
         12 . Granules according to  claim 1 , wherein the apparent density is in the range from 0.7 to 1.2. 
     
     
         13 . Use of granules according to  claim 1  as an additive in steel production and the refractory industry. 
     
     
         14 . A method for producing granules according to  claim 1  comprising the following steps:
 mixing of reactive bulk material, binder and if necessary other auxiliary materials; 
 heating the mixture to a temperature of at least the melting temperature of the binder, so that the binder at least partially melts; 
 cooling the mixture with the formation of the granules; 
 or comprising the following steps: 
 heating the binder to a temperature of at least the melting temperature of the binder; 
 mixing the at least partially melted binder with the reactive bulk material, and if necessary other auxiliary materials; 
 cooling the mixture with the formation of the granules.