Holcim Technology Ltd

A method of producing cement clinker and a second calcined material, wherein the cement clinker is produced in a first production line and the second calcined material is produced from a raw material in a second production line by carrying out the following procedures e) optionally drying the raw material in a dryer, g) calcining the optionally dried raw material in a rotary kiln to obtain the second calcined material, wherein the sensible heat of a hot gas in the first production line is used as a heat source in the calcining step g) for calcining the raw material, and wherein the rotary kiln exhaust gas coming from the calcining step g) is introduced into the first production line for the secondary combustion of the rotary kiln exhaust gas.

A method of processing exhaust gas containing CO 2 , such as exhaust gas from a cement production plant, includes burning fuel in the combustion reactor with the O 2 content of the exhaust gas being used as an oxidizing agent, controlling the combustion in the combustion reactor so that the exhaust gas from the combustion reactor contains less than 10 vol.-% of oxygen and at least 80 vol.-% of a mixture of CO and CO 2 , and feeding the exhaust gas from the combustion reactor into a conversion reactor, in which the CO 2 and optionally the CO contained in the exhaust gas is converted into a hydrocarbon fuel.

A method for treating soil contaminated with hydrocarbons, in particular with polycyclic aromatic hydrocarbons, includes working the soil with, by weight of soil from 0.1 to 12% of activated carbon; and from 0.1 to 10% of hydraulic binder, the total content of activated carbon and of hydraulic binder in particular ranging between 0.5 and 15%.

A method for covering a roof, the method comprising (i) providing first and second silicone membranes, where the membranes are in the form of rolls; (ii) unrolling the first and second silicone membranes over a roof surface; (iii) positioning first and second membranes adjacent to one another and overlapping and edge of the second over an adjacent edge of the first membrane to thereby form a lap; (iv) securing the first and second membranes to the roof surface; and (v) seaming the first membrane to the second membrane in the lap.

Foam compositions are provided. The compositions are prepared from multi-functional acetoacetate esters and multi-functional amines or acrylates. The foam compositions can include one or more additives. The foam compositions can be used for home and commercial insulation, air sealing, sound proofing, structural improvement, and exterior roofing, among other applications. The foam compositions provide advantages of being isocyanate free and offer reduced exposure to isocyanate.

A process for the production of a mineral foam includes separately preparing a slurry of cement and an aqueous foam, wherein the cement slurry includes water and Portland cement as well as calcium silicate hydrate crystallization seeds; contacting the slurry of cement with the aqueous foam to obtain a slurry of foamed cement; and casting the slurry of foamed cement and leave it to set.

An apparatus and related methods for constructing articles with cured pressure-sensitive adhesives comprising (i) a coater that applies a curable adhesive to a membrane; (ii) a cross-linking apparatus adapted to receive said membrane with said curable adhesive, said cross-linking apparatus comprising a light source positioned a first predetermined height above an aperture plate having an aperture therethrough, wherein said aperture plate is positioned a second predetermined height, said first predetermined height and said second predetermined height selected to define an exposure area of light emitted from said light source on to said curable adhesive to form a composite product; and (iii) a roll adapted to receive said composite product, said roll adapted to control a speed at which said membrane with said curable adhesive is exposed to light from said light source.

A method for the production of a cavity filled with a low-density mineral foam includes (i) preparing a cement slurry including Portland cement; ultrafine particles of which the D50 is from 10 to 600 nm; a water reducing agent; a manganese salt; and water; wherein the mass ratio of manganese salts/Portland cement is below 0.014; (ii) adding to the cement slurry obtained after (i) a gas-forming liquid including a gas-forming agent; and a viscosity-modifying agent which is a polymer chosen among anionic bio-based polymer, amphiphilic bio-based polymer, alkali swellable acrylic polymer and mixture thereof; to obtain a foaming slurry; (iii) filling the cavity with the foaming slurry obtained at (ii); (iv) leaving the foaming slurry to expand within the cavity.

A process of preparing a cemented paste backfill material, the material including ground mine tailings, a hydraulic binder and water, wherein the solids content of the backfill material is 70-82 wt.-%, the process including a) providing a dry premix, the premix including the hydraulic binder, a superplasticizer and optionally a defoaming agent, b) mixing the dry premix with the ground mine tailings and water.

An apparatus and related methods for constructing articles with cured pressure-sensitive adhesives comprising (i) a coater that applies a curable adhesive to a membrane; (ii) a cross-linking apparatus adapted to receive said membrane with said curable adhesive, said cross-linking apparatus comprising a light source positioned a first predetermined height above an aperture plate having an aperture therethrough, wherein said aperture plate is positioned a second predetermined height, said first predetermined height and said second predetermined height selected to define an exposure area of light emitted from said light source on to said curable adhesive to form a composite product; and (iii) a roll adapted to receive said composite product, said roll adapted to control a speed at which said membrane with said curable adhesive is exposed to light from said light source.