Hydraulic cements

CCHEMISTRY METALLURGY C04Concrete, cement, ceramics C04BLIME, MAGNESIA SLAG CEMENTS COMPOSITIONS THEREOF

C04B7/00Hydraulic cements

C04B7/003Barium or strontium cements C04B7/006Cement-clinker used in the unground state in mortar - or concrete compositions C04B7/02Portland cement C04B7/04using raw materials containing gypsum C04B7/06using alkaline raw materials C04B7/12Natural pozzuolanes Natural pozzuolana cements; Artificial pozzuolanes or artificial pozzuolana cements other than those obtained from waste or combustion residues C04B7/13Mixtures thereof with inorganic cementitious materials C04B7/14Cements containing slag C04B7/147Metallurgical slag C04B7/153Mixtures thereof with other inorganic cementitious materials or other activators C04B7/1535with alkali metal containing activators C04B7/17with calcium oxide containing activators C04B7/19Portland cements C04B7/21with calcium sulfate containing activators C04B7/22Iron ore cements; Iron rich cements C04B7/24Cements from oil shales, residues or waste other than slag C04B7/243Mixtures thereof with activators or composition-correcting additives C04B7/246from waste building materials C04B7/26from raw materials containing flue dust C04B7/28from combustion residues C04B7/30from oil shale from oil shale residues; from lignite processing C04B7/32Aluminous cements C04B7/323Calcium aluminosulfate cements C04B7/326Calcium aluminohalide cements C04B7/34Hydraulic lime cements Roman cements; natural cements C04B7/345Hydraulic cements not provided for in one of the groups C04B7/02 - C04B7/34 C04B7/3453Belite cements C04B7/3456Alinite cements C04B7/36Manufacture of hydraulic cements in general C04B7/361Condition or time responsive control in hydraulic cement manufacturing processes C04B7/362for raw materials handling C04B7/364Avoiding environmental pollution during cement-manufacturing C04B7/365by extracting part of the material from the process flow and returning it into the process after a separate treatment C04B7/367Avoiding or minimising carbon dioxide emissions C04B7/368Obtaining spherical cement particles C04B7/38Preparing or treating the raw materials individually or as batches C04B7/40Dehydrating Forming C04B7/42Active ingredients added before, or during, the burning process C04B7/421Inorganic materials C04B7/422Elements C04B7/424Oxides, Hydroxides C04B7/425Acids or salts thereof C04B7/427Silicates C04B7/428Organic materials C04B7/43Heat treatment C04B7/432Preheating without addition of fuel C04B7/434Preheating with addition of fuel C04B7/436Special arrangements for treating part or all of the cement kiln dust C04B7/438Evacuating at least part of the heat treated material before the final burning or melting step, the evacuated material being used as a cement as such C04B7/44Burning Melting C04B7/4407Treatment or selection of the fuel therefor C04B7/4415Waste hot gases C04B7/4423Waste or refuse used as fuel C04B7/443Tyres C04B7/4438the fuel being introduced directly into the rotary kiln C04B7/4446the fuel being treated in a separate gasifying or decomposing chamber C04B7/4453using plasmas or radiations C04B7/4461Grate sintering C04B7/4469in shaft or vertical kilns C04B7/4476Selection of the kiln atmosphere C04B7/4484Non-electric melting C04B7/4492Inhibiting the formation of or eliminating incrustations in the cement kiln C04B7/45in fluidised beds C04B7/46electric C04B7/47Cooling; Waste heat management C04B7/475using the waste heat C04B7/48Clinker treatment C04B7/51Hydrating C04B7/52Grinding; After-treatment of ground cement C04B7/522After-treatment of ground cement C04B7/525Briquetting C04B7/527obtaining cements characterised by fineness C04B7/60Methods for eliminating alkali metals or compounds thereof