Method for producing pressed articles containing coal particles

Abstract

Coal particles to be processed into compressed articles are impregnated with a substance before being mixed with a binder system containing water and finally being processed into compressed articles.

1 - 17 . (canceled) 
     
     
         18 . A method for producing a pressed article containing coal particles in which the coal particles are mixed with a water-containing binder system comprising:
 a binder system containing molasses as well as quicklime or hydrated lime,   a binder system containing an emulsion of bitumen in water, and the mixture thereby obtained is further processed into pressed articles by pressing,   wherein before the mixing with the water-containing binder system, the coal particles are subjected to an impregnating step in which they are impregnated with at least one of a water-insoluble and a water-repellent substance.   
     
     
         19 . The method according to  claim 18 , wherein the impregnating step comprises damping the coal particles with at least one of the water-insoluble and water-repellent substance, spraying the coal particles with at least one of the water-insoluble and water-repellent substance, mixing at least one of the water-insoluble and water-repellent substance into a moving packed bed of the coal particles, or mixing at least one of the water-insoluble and water-repellent substance into a fluidized bed of the coal particles. 
     
     
         20 . The method according to  claim 18 , wherein the lower limit of the amount of at least one of water-insoluble and water-repellent substance added in the impregnating step is 0.5% by weight or 1% by weight, and the upper limit is 5% by weight or 3% by weight or 2% by weight, with respect to the weight of the material to be processed into pressed articles, the coal particles. 
     
     
         21 . The method according to  claim 18 , wherein iron- or iron-oxide-containing particles are also processed in a mixture with the coal particles. 
     
     
         22 . The method according to  claim 18 , wherein the pressed article is subjected to a heat treatment after the pressing. 
     
     
         23 . The method according to  claim 18 , wherein the coal particles are subjected to a heat treatment after the impregnating step, before mixing with the water-containing binder system. 
     
     
         24 . A pressed article, containing up to 97% by weight of coal particles, and up to 12% by weight of components of a binder system, wherein, with respect to the weight of the coal particles as the material to be processed into pressed articles, the material contains at least one of water-insoluble and water-repellent substances in an amount of which the lower limit is 0.5% by weight or 1% by weight, and the upper limit is 5% by weight or 3% by weight or 2% by weight. 
     
     
         25 . The pressed article according to  claim 24 , wherein at least one of the water-insoluble and water-repellent substance belongs to the group of substances consisting of waxes, organic coking-plant or refinery products, as well as plastics or plastics scrap, and used oil. 
     
     
         26 . The pressed article according to  claim 24 , wherein the pressed article also contains iron- or iron-oxide-containing particles. 
     
     
         27 . A method for producing pig iron comprising the step of providing a pressed article containing up to 97% by weight of coal particles, and up to 12% by weight of components of a binder system, wherein, with respect to the weight of the coal particles as the material to be processed into pressed articles, the material contains at least one of water-insoluble and water-repellent substances in an amount of which the lower limit is 0.5% by weight or 1% by weight, and the upper limit is 5% by weight or 3% by weight or 2% by weight, and
 using the pressed article in a process for producing pig iron in a fixed bed as a carbon carrier or in a process for producing carbon carriers for a process for producing pig iron in a fixed bed.   
     
     
         28 . The method according to  claim 27 , wherein at least one of the water-insoluble and water-repellent substance belongs to the group of substances comprising waxes, organic coking-plant or refinery products, as well as plastics or plastics scrap, and used oil. 
     
     
         29 . The method according to  claim 27 , wherein the pressed article also contains iron- or iron-oxide-containing particles. 
     
     
         30 . A method for producing a pressed article containing coal particles in which the coal particles are mixed with a water-containing binder system and the mixture thereby obtained is further processed into pressed articles by pressing, wherein
 before the mixing with the water-containing binder system, the coal particles are subjected to an impregnating step in which they are impregnated with a substance from the group consisting of:   water,   an aqueous solution of a substance or substance mixture,   an aqueous suspension of solid colloids, the solid substance having water-repelling properties,   an emulsion, containing water on the one hand and carbon-containing substances on the other hand and   at least one of a liquid water-insoluble and water-repellent substance.   
     
     
         31 . The method according to  claim 30 , wherein the impregnating step comprises damping the coal particles with the substance, spraying the coal particles with the substance, mixing the substance into a moving packed bed of the coal particles, or mixing the substance into a fluidized bed of the coal particles. 
     
     
         32 . The method according to  claim 30 , wherein the lower limit of the amount of substance added in the impregnating step is 0.5% or 1% by weight, and the upper limit is 5%, 3% or 2% by weight, with respect to the weight of the material to be processed into pressed articles, the coal particles. 
     
     
         33 . The method according to  claim 30 , wherein the binder system contains molasses and quicklime or hydrated lime. 
     
     
         34 . The method according to  claim 30 , wherein the binder system contains an emulsion of bitumen in water. 
     
     
         35 . The method according to  claim 30 , wherein iron- or iron-oxide-containing particles are also processed in a mixture with the coal particles. 
     
     
         36 . The method according to  claim 30 , wherein the pressed article is subjected to a heat treatment after the pressing. 
     
     
         37 . The method according to  claim 30 , wherein the coal particles are subjected to a heat treatment after the impregnating step, before mixing with the water-containing binder system. 
     
     
         38 . A pressed article, containing up to 97% by weight of coal particles, and up to 12% by weight of components of a binder system, wherein with respect to the weight of the coal particles as the material to be processed into pressed articles, it contains at least one of water-insoluble and water-repellent substances, or solid substances with water-repelling properties, in an amount of which the lower limit is 0.5% or 1% by weight, and the upper limit is 5%, 3% or 2% by weight. 
     
     
         39 . The pressed article according to  claim 38 , wherein at least one of the water-insoluble and water-repellent substance belongs to the group of substances consisting of waxes, organic coking-plant or refinery products, as well as plastics or plastics scrap, and used oil. 
     
     
         40 . The pressed article according to  claim 38 , wherein the pressed article also contains iron- or iron-oxide-containing particles. 
     
     
         41 . A method for producing pig iron comprising:
 providing of a pressed article containing up to 97% by weight of coal particles, and up to 12% by weight of components of a binder system, wherein with respect to the weight of the coal particles as the material to be processed into pressed articles, it contains at least one of water-insoluble and water-repellent substances, or solid substances with water-repelling properties, in an amount of which the lower limit is 0.5% or 1% by weight, and the upper limit is 5%, 3% or 2% by weight; and   using the pressed article in a process for producing pig iron in a fixed bed as a carbon carrier or in a process for producing carbon carriers for a process for producing pig iron in a fixed bed.