公开(公告)号：US11034617B2

公开(公告)日：2021-06-15

申请号：US15849038

申请日：2017-12-20

Applicant: Gerdau S.A.

Inventor： Marina Reno Barbosa ,  Alexandre de Matos ,  Edson Geraldo da Silva ,  Arnaldo Dias de Andrade ,  Ruben Antonio Sole ,  Fernando Gabriel da Silva Araujo ,  Jefferson Januario Mendes ,  Fernando Leopoldo von Krueger

IPC: C04B5/00 ,  C04B7/14 ,  C04B28/08 ,  C04B5/06 ,  C04B7/147 ,  C21B3/08 ,  C04B7/40 ,  C04B7/00 ,  C04B7/34 ,  C04B28/00 ,  C04B32/00 ,  C04B103/52

Abstract: The present invention relates to a novel cementitious product produced from steelworks slag additivation to obtain material having properties suitable for use in the partial or total clinker replacement for the production of different types of cement. The process, which is also object of this invention, aims to adapt the properties of steelworks slag, by means of thermochemical treatment, including and preferably, but not only, still in the liquid steelworks slag pot, taking advantage of the thermal input of steel processing, to form a greater amount of alite (essential compound to increase pozzolanicity), under controlled conditions. After additivation, preferably, but not exclusively, the additivated steelworks slag is subjected to quenching, comminution and concentration to stabilize the alite fraction, to release the present phases and to remove any excess contaminants, such as metallic iron.

公开(公告)号：US20180170805A1

公开(公告)日：2018-06-21

申请号：US15849038

申请日：2017-12-20

Applicant: Gerdau S.A.

Inventor： Marina Reno Barbosa ,  Alexandre de Matos ,  Edson Geraldo da Silva ,  Arnaldo Dias de Andrade ,  Ruben Antonio Sole ,  Fernando Gabriel da Silva Araujo ,  Jefferson Januario Mendes ,  Fernando Leopoldo von Krueger

IPC: C04B5/06 ,  C21B3/10 ,  C04B7/147 ,  C04B28/08 ,  C04B103/52

CPC classification number: C04B5/06 ,  C04B7/147 ,  C04B7/40 ,  C04B28/082 ,  C04B2103/52 ,  C21B3/08 ,  Y02P40/143 ,  Y02W30/94 ,  C04B14/06 ,  C04B18/142 ,  C04B40/0028

Abstract: The present invention relates to a novel cementitious product produced from steelworks slag additivation to obtain material having properties suitable for use in the partial or total clinker replacement for the production of different types of cement. The process, which is also object of this invention, aims to adapt the properties of steelworks slag, by means of thermochemical treatment, including and preferably, but not only, still in the liquid steelworks slag pot, taking advantage of the thermal input of steel processing, to form a greater amount of alite (essential compound to increase pozzolanicity), under controlled conditions. After additivation, preferably, but not exclusively, the additivated steelworks slag is subjected to quenching, comminution and concentration to stabilize the alite fraction, to release the present phases and to remove any excess contaminants, such as metallic iron.