WO 2018/231043 A1

Pressurised kiln for calcinating limestone sands using an underground internal combustion chamber

(22) 12.06.2018

(43) 20.12.2018

(57) The present invention relates to a kiln for calcinating limestone and dolomitic sands to obtain quicklime (CaO). The invention also relates to a system for hydrating the quicklime inside the kiln to obtain hydrated lime (Ca(OH)2), also known as slaked lime. The kiln is vertical and operates under pressure, with the interior thereof containing an underground calcination chamber (17) housing at least one heat source. The kiln can calcinate sands with a high calcium carbonate (CaCO3) content, operating at a temperature of between 900 and 1000°C for a period of between 2 and 3 hours. The upper part of the kiln is equipped with a device for cleaning and scrubbing the combustion gases. The interior of the kiln is also equipped with means for supplying cooling air, water for hydration to obtain slaked lime, and a discharge device that regulates the time the material remains in the kiln, said device being used to control the degree of calcination and quality of the product.

(71) Bricio Ochoa, Francisco Javier, Paseo de la Noria #3408, Col. Colinas de San Javier, Zapopan, Jalisco, 45110 (MX)

(84) ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)

Related articles:

Issue 10/2018 WO 2018/132429 A1

Plant and method for generating negative emissions of CO2

(22) 19.01.2018 (43) 26.07.2018 (57) The invention relates to a plant for generating negative emissions of CO2. The plant 100 comprises a gasifier 110, a lime kiln 130, a separator 150, and a CO2...

Issue 3/2019 WO2019004892 (A1)

A vertical lime kiln

(22) 23.05.2018 (43) 03.01.2019 (57) The present disclosure relates to a vertical lime kiln, specifically adapted for allowing mobility and reuse of the material used for constructing the kiln. The...

Issue 5/2018 KR101832105 (B1)

Method for manufacturing milk of lime using waste heat recovery line

(22) 05.09.2017 (43) 26.02.2018 (57) The present invention relates to a waste heat recovery line capable of recovering waste heat generated in the production of liquid limestone oil and transferring...

Issue 6/2018 WO 2018/059715 A1

Process enabling the use alternative fuels with high chlorine content in clinker production

(22) 30.09.2016 (43) 05.04.2018 (57) The invention relates to a process enabling the use of alternative fuels, mainly the use of wastes materials or Refuse Derived Fuels (RDF) containing high chlorine...

Issue 12/2018 WO 2018/153678 A1

Installation for producing cement clinker and method for operating such an installation

(22) 08.02.2018 (43) 30.08.2018 (57) The invention relates to a method for operating an installation (10) for producing cement clinker, said installation having a pre-heater (12) for pre-heating...