Patent ID: 8858705

Claim:
A process for the production of binders by burning mineral a starting material of raw-material mixtures in a shaft furnace with countercurrent gasification, wherein oil shale and/or oil sand beds are converted by agglomeration into porous particles of a certain size and consistency, and a water component is adjusted to less than 25% and the porosity of the agglomerates is adjusted up to 25% for mechanically stabilizing the agglomerate, and the agglomerates are burned at temperatures between 800° C. and 1500° C. under reductive conditions throughout the entire process at a lambda <1 in a vertical shaft furnace with countercurrent gasification into binders, and the binder properties are adjusted by addition of CaO-containing substances and/or sulfur components of the oil sand and/or oil shale are bound by means of the CaO that is present in and/or added to the starting material.