Cement hexavalent chromium reducing agent

• Main Authors: ZHAO XIAOJUN, WANG DEDONG, HUANG GUOXIONG, WANG SHENGMIN, TAN RONG, LIU TAO
• Format: Patent
• Language: Chinese; English
• Published: 02.10.2018
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention discloses a cement hexavalent chromium reducing agent, and belongs to the technical field of cement additives. The cement hexavalent chromium reducing agent is prepared from the following raw materials by mass: 20%-25% of stannous fluoroborate, 42%-50% of ferrous sulfate, 10%-15% of manganese sulfate, 6%-10% of titanium dioxide, 5%-8% of paraformaldehyde and 3%-5% of methylcellulose.The efficient cement hexavalent chromium reducing agent provided by the invention is mainly applied to cement production, is added into a cement clinker after ball milling at the dosage of 100-250 g/ton in use and uniformly mixed, is not easy to be oxidized and deliquesced, has stable physical and chemical characteristics, has an obvious effect of reducing hexavalent chromium in cement, and has stable functions. 本发明公开种水泥六价铬还原剂，属于水泥添加剂技术领域。此还原剂由质量百分比含量为氟硼酸亚锡20%～25%，硫酸亚铁42%～50%，硫酸锰10%～15%，钛白粉6%～10%，多聚甲醛5%～8%和甲基纤维素3%～5%制备得到。本发明所述高效水泥六价铬还原剂主要应用于水泥生产，使用时按100～250克/吨的剂量加入球磨后的水泥熟料中并混合均匀；本发明所述还原剂不易氧化、潮解，物化特征稳定，对水泥中六价铬还原效果明显，功