Method for producing and using a cement-type binding material

A method for producing a cement material in the form of a multi-phase mixture including calcium sulfate and .beta.-C.sub.2 S, comprising the following steps:

• (a) desulfurizing flue gases to provide a desulfurized starting product containing calcium in a form selected from the group consisting of calcium sulfite, calcium sulfate, calcium hydroxide, and calcium carbonate,
• (b) mixing flue ash or flue dust with said desulfurized starting product to form a mixture in which said flue dust is present in such proportion that any free lime present and lime produced by a subsequent oxidizing and calcining step is completely bound by aluminates and silicates capable of reacting with water,
• (c) oxidizing and calcining said mixture at a temperature within the range of 700.degree. C. to 950.degree. C. to provide an intermediate multi-phase product in which the following components are present in parts by weight of the total intermediate product:
• Cs=5 to 60, C.sub.12 A.sub.7 =2 to 35, C.sub.3 A.sub.3 Cs=1 to 20, and .beta.-C.sub.2 S=3 to 50,
• wherein C=CaO;
• s=SO.sub.3 ;
• A=Al.sub.2 O.sub.3 ;
• and S=SiO.sub.2,
• (d) milling said intermediate multi-phase product such that a grain fineness according to Blaine is within the range of 3,000 to 10,000 cm.sup.2 /g,
• (e) milling slag to form slag sand having a grain finess according to Blaine within the range of 2,500 to 5,000 cm.sup.2 /g, and
• (f) combining by mixing 100 parts by weight of said intermediate multi-phase product with 10 to 50 parts by weight of said slag sand to form said cement material as a mixture capable of the following strength forming reactions ##STR3##