Process for the production of binders

摘要

The invention relates to a process for the production of binders by calcinating mineral raw material mixtures. In order to improve the process and the quality of the binders, it is proposed that oil shale and/or oil sand fills are converted by targeted agglomeration into particles of a certain size and consistency, wherein the water content for the mechanical stabilization of the agglomerate is adjusted to less than 25 percent and the agglomerates are calcinated to form binders at temperatures between 800 and 1500° C. under reductive conditions over the entire process with a Lambda value <1 in a vertical shaft furnace with updraft gasification. The binding properties are adjusted by the targeted addition of CaO-containing substances and/or existing sulfur fractions of the oil sands and/or oil shales are bound by means of the CaO that is present in the starting material and/or added.

主权项

1. 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.