Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for reducing free calcium oxide in steel slag by using ferronickel slag and application thereof
The invention discloses a method for reducing free calcium oxide in steel slag by using ferronickel slag and application of the ferronickel slag, the ferronickel slag and the steel slag are mixed and reacted under a hot melting condition by using waste heat after smelting, and external heat is not needed; wherein the mass ratio of the ferronickel slag to the steel slag is 1: 0.6-4, and at least one of the ferronickel slag and the steel slag is in a molten state. Compared with the prior art, the method has the following advantages: (1) the problem that the content of f-CaO in the converter steel slag is relatively high is solved, and the content of f-CaO in the steel slag subjected to ferronickel slag treatment can be controlled below 3%, so that the purpose of reducing the water expansibility of the steel slag is achieved, and the mixed steel slag is more stable and durable in the field of building materials; or can be directly applied to the building material industry and the road and bridge construction field; and (2) f-CaO in other metallurgical slag can be reduced, mixing treatment of more than two kinds of slag is not eliminated, addition of other components except the metallurgical slag in the mixing process is also not eliminated, but the content of f-CaO in the metallurgical slag is reduced by utilizing the looseness and low-calcium property of the ferronickel slag.
本发明公开了利用镍铁渣降低钢渣中游离氧化钙的方法及其应用，所述方法将镍铁渣和钢渣利用冶炼后的余温在热熔条件下混合反应，无需外部热量；其中，镍铁渣和钢渣的质量比为1:0.6‑4，且二者至少一种为熔融状态。与现有技术相比，本发明具有以下优点：(1)解决了转炉钢渣中f‑CaO含量较高的问题，经过镍铁渣处理的钢渣中f‑CaO含量能够控制在3％以下，从而实现其遇水膨胀性减小的目的，使得混合钢渣在建材领域更加稳定耐用，或可直接应用于建材行业和路桥建设领域；(2)其还可衍生到降低其余冶金渣中的f‑CaO，不排除两种以上渣混合处理，也不排除在混合过程中除了添加冶金渣，还可添加其它组份，但是其均是利用镍铁渣的松散性和低钙性来降低冶金渣中f‑CaO的含量。
Method for reducing free calcium oxide in steel slag by using ferronickel slag and application thereof
The invention discloses a method for reducing free calcium oxide in steel slag by using ferronickel slag and application of the ferronickel slag, the ferronickel slag and the steel slag are mixed and reacted under a hot melting condition by using waste heat after smelting, and external heat is not needed; wherein the mass ratio of the ferronickel slag to the steel slag is 1: 0.6-4, and at least one of the ferronickel slag and the steel slag is in a molten state. Compared with the prior art, the method has the following advantages: (1) the problem that the content of f-CaO in the converter steel slag is relatively high is solved, and the content of f-CaO in the steel slag subjected to ferronickel slag treatment can be controlled below 3%, so that the purpose of reducing the water expansibility of the steel slag is achieved, and the mixed steel slag is more stable and durable in the field of building materials; or can be directly applied to the building material industry and the road and bridge construction field; and (2) f-CaO in other metallurgical slag can be reduced, mixing treatment of more than two kinds of slag is not eliminated, addition of other components except the metallurgical slag in the mixing process is also not eliminated, but the content of f-CaO in the metallurgical slag is reduced by utilizing the looseness and low-calcium property of the ferronickel slag.
本发明公开了利用镍铁渣降低钢渣中游离氧化钙的方法及其应用，所述方法将镍铁渣和钢渣利用冶炼后的余温在热熔条件下混合反应，无需外部热量；其中，镍铁渣和钢渣的质量比为1:0.6‑4，且二者至少一种为熔融状态。与现有技术相比，本发明具有以下优点：(1)解决了转炉钢渣中f‑CaO含量较高的问题，经过镍铁渣处理的钢渣中f‑CaO含量能够控制在3％以下，从而实现其遇水膨胀性减小的目的，使得混合钢渣在建材领域更加稳定耐用，或可直接应用于建材行业和路桥建设领域；(2)其还可衍生到降低其余冶金渣中的f‑CaO，不排除两种以上渣混合处理，也不排除在混合过程中除了添加冶金渣，还可添加其它组份，但是其均是利用镍铁渣的松散性和低钙性来降低冶金渣中f‑CaO的含量。
Method for reducing free calcium oxide in steel slag by using ferronickel slag and application thereof
利用镍铁渣降低钢渣中游离氧化钙的方法及其应用
YANG ZHIBIN (Autor:in) / CHEN CHONGXUE (Autor:in) / JIN HAI (Autor:in) / MAO RUI (Autor:in) / LEI MING (Autor:in) / DU PING (Autor:in) / ZHENG CHUANBO (Autor:in) / MA HAN (Autor:in) / ZOU CHANGDONG (Autor:in)
11.03.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
| Europäisches Patentamt | 2023
| Europäisches Patentamt | 2024