Title:
MANUFACTURING PROCESS OF POZZOLAN WITH COLOR CHANGE AND POZZOLAN THUS OBTAINED
Document Type and Number:
WIPO Patent Application WO/2018/195624
Kind Code:
A3
Abstract:
The present invention refers to a manufacturing process of artificial pozzolan which has the final color gray. In order to perform the processes in the desired way, the kiln atmosphere shall contain low oxygen concentration and the presence of reducing agents. However the presence of carbon monoxide at the kiln outlet is not desirable, due to environmental impacts and the increase in specific heat consumption of the kiln. So the process described in this invention comprises the following steps: heating (1), which consists of heating the raw materials to a temperature between 100-350°C until drying of the material to a moisture mass fraction of 0-5% (wet basis); mixing (2), which consists of mixing the dry raw materials from the heating process with the right proportion of fuel, from 1% to 5% in mass fraction, according to the concentration of hematite present in the raw material; calcining (3), which consists of heating the fuel and raw materials blend to a temperature between 700-900°C, with oxygen concentration between 1-5% and, finally, cooling (4), which consists of an initial step of rapid decrease in pozzolan temperature until 600°C and a final step of slow decrease in pozzolan temperature until 120°C.
More Like This:
Inventors:
FERREIRA GUILHERME MARTINS (BR)
FABIANI LUIS FILIPE VON RAINER (BR)
DE PINHO LUIZ FELIPE (BR)
BORGES RODRIGO DE SOUSA (BR)
FABIANI LUIS FILIPE VON RAINER (BR)
DE PINHO LUIZ FELIPE (BR)
BORGES RODRIGO DE SOUSA (BR)
Application Number:
PCT/BR2018/050120
Publication Date:
December 13, 2018
Filing Date:
April 23, 2018
Export Citation:
Assignee:
DYNAMIS ENGENHARIA E COMERCIO LTDA (BR)
International Classes:
C04B7/47; C04B14/16; C10L5/02
Foreign References:
| US20140000491A1 | 2014-01-02 | |||
| BRPI1002450A2 | 2012-05-15 | |||
| US20120145042A1 | 2012-06-14 |
Other References:
ALMENARES, RS ET AL.: "Industrial calcination of kaolinitic clays to make reactive pozzolans", CASE STUDIES IN CONSTRUCTION MATERIALS, vol. 6, 4 April 2017 (2017-04-04), pages 225 - 232, XP055554255
Attorney, Agent or Firm:
ARIBONI, FABBRI E SCHMIDT SOCIEDADE DE ADVOGADOS (BR)
Download PDF:
Previous Patent: ASSEMBLABLE TANK
Next Patent: COMPOSITION FOR ACTING ON A MOISTURE BARRIER FOR A THERMOPLASTIC POLYMER, METHOD FOR PREPARING THE C...
Next Patent: COMPOSITION FOR ACTING ON A MOISTURE BARRIER FOR A THERMOPLASTIC POLYMER, METHOD FOR PREPARING THE C...