53 results about "Cement type" patented technology

The invention relates to an installation comprising a combustion chamber (15) provided with means (53) which are used to introduce the mineral load and are connected to a pre-heater (27), combustion means (55) for maintaining the chamber (15) at a temperature of between 700 DEG C and 900 DEG C, means (57) for introducing a treatment gas having a controlled carbon dioxide content in order to oppose the dissociation of the carbonate in the chamber (15), and means (61) for removing the calcinated mineral load guided into a cooler (31). The chamber (15) comprises means (51) for forming a fluidised bed. The means (57) for introducing treatment gases are supplied at least partially by a line (91) for deriving part of the combustion flue gases of the chamber (15) emitted by means for discharging (21) said flue gases into the atmosphere. The invention can be used for the production of a cement-type hydraulic binder.

Film for the protection of powered axle, comprises: a first layer comprising a compound of aluminum and elastomers, and an adhesive compound, which is deposited on the compound, where is adhered with; and a second layer, comprising the adhesive compound in pasty form of cement type, applied to the face of not comprising adhesive compound.

The invention discloses a C3S (3CaO.SiO2) type sulfoaluminate cement clinker and a preparation method, coexistence of C3S (3CaO.SiO2) and C4A3S (anhydrous calcium sulphoaluminate) can be implemented under the condition of low temperature and high content of SO3, the C3S type sulfoaluminate cement clinker is prepared, and comprises the following chemical components: 45%-60% of CaO, 7%-13% of SiO2, 20%-35% of Al2O3, 1.6%-9% of Fe2O3, 5%-12% of SO3, 0.2%-1.0% of CaF2, 0.0%-0.2% of ZnO, the basicity coefficient cm is 1.2-1.5, and the aluminum and sulfur ratio is controlled in 5-4. The preparation method is as follows: the existing C2S (2CaO.SiO2) type sulphoaluminate cement clinker production line is used for production, and the difference is in firing temperature. The firing temperature of the C3S type sulfoaluminate cement clinker is 1220 DEG to 1320 DEG C, the optimum firing temperature is 1250 DEG to 1270 DEG, the firing temperature of the C3S type sulfoaluminate cement clinker is 30 DEG to 50 DEG C lower than the firing temperature of the C2S type sulfoaluminate cement clinker, and after firing, the C3S type sulfoaluminate cement clinker is drawn out of a kiln, and rapidly cooled. The C3S type sulfoaluminate cement clinker has high alkalinity, and can promote the hydration of the C4A3S (anhydrous calcium sulphoaluminate), so that prepared cement has high early strength, at the same time for the reason that activity of C3S is much higher than that of C2S, later strength support is provided while certain early strength is provided.

The invention discloses a method for constituting a model for predicting the thermal diffusivity (alpha) of normal concrete along with the development of age (t). The invention studies the change rule of the thermal diffusivity (alpha) of the concrete with different water-cement ratios, admixtures, cement types, sand ratios and aggregate contents along with the development of the age (t), and establishes the model for predicting the thermal diffusivity (alpha) of the normal concrete along with the development of the age (t) according to the common rule of the thermal diffusivity (alpha) of the concrete along with the development of the age (t) under the different working conditions. The model is shown in a formula (as in the drawing). In the formula, alpha (t) is the value of the thermal diffusivity of the concrete at the age of t and has a measurement unit of m<2> / h; and alpha (t) is the value of the thermal diffusivity of reinforced concrete and has a measurement unit of m<2> / h; andt is the age and is measured by hour. The model can well represent the change rule of the thermal diffusivity (alpha) of the normal concrete along with the development of the age (t).

The invention provides an electrolytic manganese residue-based ointment filling material which comprises original electrolytic manganese residues, carbide slag and an electrolytic manganese residue cementing agent, wherein the electrolytic manganese residue cementing agent comprises ground electrolytic manganese residue powder, boiling furnace slag, cement kiln ash, phosphorus slag powder, petroleum coke desulfurized fly ash and additives. A preparation method of the material comprises the following steps: by taking the original electrolytic manganese residues as a basic raw material, adding the carbide slag and the electrolytic manganese residue cementing agent, rapidly stirring for 10-20 minutes, adding water till the water content of the filling material meets a provided value, and further stirring for 10-30 minutes, thereby obtaining the electrolytic manganese residue-based ointment filling material. Compared with a cement type mine filling material, the electrolytic manganese residue-based ointment filling material provided by the invention is good in filling mobility, relatively rapid in strength increase, good in slight swelling property and low in heavy metal leaching concentration.