Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Lithium-doped oil well cement and preparation method thereof
The invention relates to the technical field of cement, and discloses lithium-doped oil well cement and a preparation method thereof.spodumene solid waste obtained through pressure leaching of nitric acid is adopted as a raw material for sintering oil-gas well cement clinker, and growth of C3S crystals can be promoted in the sintering process of the oil-gas well cement clinker, so that the C3S crystal grains are increased, and the reaction activity is enhanced; particularly, the early reaction activity of the lithium-doped oil well cement can be improved. The activation energy during the C4AF reaction can be reduced, the hydration reaction activity of the C4AF is improved, and the formation of an AFm-OH phase hydration product is promoted; the AFm-OH phase is doped on the surface of the C-S-H and between layers, so that the deformability of the C-S-H can be improved, the interlayer structure is densified, and the strength and the toughness of the set cement are further improved; the formation of C3A crystals can be inhibited, and the sulfuric acid corrosion resistance of the oil well cement can be improved.
本发明涉及水泥技术领域，公开了一种锂掺杂油井水泥及其制备方法，采用硝酸加压浸出锂辉石固废作为烧结油气井水泥熟料的原料，在油气井水泥熟料烧结过程中能够促进C3S晶体的生长，使得C3S晶粒增大，反应活性增强，尤其是可以提升锂掺杂油井水泥早期的反应活性。不仅能使C4AF反应时的活化能降低，C4AF的水化反应活性提高，促进了AFm‑OH相水化产物的形成；AFm‑OH相在C‑S‑H表面和层间的掺杂，可以提高C‑S‑H的变形能力，致密化层间结构，进而提高了水泥石的强度及韧性；也能抑制了C3A晶体的形成，有助于提高油井水泥抗硫酸侵蚀的能力。
Lithium-doped oil well cement and preparation method thereof
The invention relates to the technical field of cement, and discloses lithium-doped oil well cement and a preparation method thereof.spodumene solid waste obtained through pressure leaching of nitric acid is adopted as a raw material for sintering oil-gas well cement clinker, and growth of C3S crystals can be promoted in the sintering process of the oil-gas well cement clinker, so that the C3S crystal grains are increased, and the reaction activity is enhanced; particularly, the early reaction activity of the lithium-doped oil well cement can be improved. The activation energy during the C4AF reaction can be reduced, the hydration reaction activity of the C4AF is improved, and the formation of an AFm-OH phase hydration product is promoted; the AFm-OH phase is doped on the surface of the C-S-H and between layers, so that the deformability of the C-S-H can be improved, the interlayer structure is densified, and the strength and the toughness of the set cement are further improved; the formation of C3A crystals can be inhibited, and the sulfuric acid corrosion resistance of the oil well cement can be improved.
本发明涉及水泥技术领域，公开了一种锂掺杂油井水泥及其制备方法，采用硝酸加压浸出锂辉石固废作为烧结油气井水泥熟料的原料，在油气井水泥熟料烧结过程中能够促进C3S晶体的生长，使得C3S晶粒增大，反应活性增强，尤其是可以提升锂掺杂油井水泥早期的反应活性。不仅能使C4AF反应时的活化能降低，C4AF的水化反应活性提高，促进了AFm‑OH相水化产物的形成；AFm‑OH相在C‑S‑H表面和层间的掺杂，可以提高C‑S‑H的变形能力，致密化层间结构，进而提高了水泥石的强度及韧性；也能抑制了C3A晶体的形成，有助于提高油井水泥抗硫酸侵蚀的能力。
Lithium-doped oil well cement and preparation method thereof
一种锂掺杂油井水泥及其制备方法
WANG WEILONG (Autor:in) / ZHANG GAOYIN (Autor:in) / GU TAO (Autor:in) / LIU LAIBAO (Autor:in) / ZHANG LIHUA (Autor:in) / WANG ZIYI (Autor:in) / HUANG YANLING (Autor:in) / ZHAO LIN (Autor:in) / DAN YONG (Autor:in) / ZHAO PENG (Autor:in)
28.05.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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