초록 ▼

The process is disclosed for the manufacture of briquettes in which an essentially solid fuel material such as hard coal, coke, soft coal, charcoal or more particularly, anthracite, and other coals of low volatility are mixed in the presence of polyvinyl alcohol and calcium oxide and/or magnesium ox

The process is disclosed for the manufacture of briquettes in which an essentially solid fuel material such as hard coal, coke, soft coal, charcoal or more particularly, anthracite, and other coals of low volatility are mixed in the presence of polyvinyl alcohol and calcium oxide and/or magnesium oxide, as well as at least 1 percent by weight of water, and formed into briquettes. The calcium oxide is preferably caustic lime. The polyvinyl alcohol is preferably applied as an aqueous solution. The briquettes so formed are characterized by high initial crush resistance, i.e. the solidity shortly after the briquetting process, by high abrasion resistance, easy handling and, in the event that anthracite is employed, a carbon tar index of less than 50. The waste gases emitted during the burning of these briquettes have a distinctly reduced SO2 content.

대표청구항 ▼

A fuel briquette having a trummel strength of at least 80% and an initial press strength of 90 to 250N/cm2, obtained by briquettization of a mixture consisting essentially of a substantially solid fuel material selected from the group consisting of hard coal, coke, brown coal, wood coal, and mixture

A fuel briquette having a trummel strength of at least 80% and an initial press strength of 90 to 250N/cm2, obtained by briquettization of a mixture consisting essentially of a substantially solid fuel material selected from the group consisting of hard coal, coke, brown coal, wood coal, and mixtures thereof; 0.5 to 2% polyvinylalcohol; and 0.5 to 4.5% of at least one oxide selected from the group consisting of calcium oxide and magnesium oxide, in the presence of at least 1.0% by weight water.