摘要
以首云矿业股份有限公司铁尾矿、低品位矾土等为原料制备铁尾矿贝利特硫铝酸盐水泥,为铁尾矿的高附加值利用探索新的途径。研究结果表明:在生料中铁尾矿、矾土、煅烧石灰石、Al2O3、CaSO4.2H2O的配比为10∶17∶48∶15∶10,煅烧温度为1 350℃,煅烧时间为20 min条件下,可制备出矿物成分以C4A3S珔、C2S、C4AF为主,f-CaO含量小于1.5%的铁尾矿贝利特硫铝酸盐水泥熟料。向该熟料中配入与其质量比均为8%的天然石膏和石灰石制成水泥,再按胶砂比为1∶3、水胶比为0.6制成水泥胶砂,胶砂的3 d抗压强度达38.1 MPa、28 d抗压强度达52.5 MPa。
With iron tailings and low grade bauxite from Shouyun Mining Company as raw materials,the belite-sulphoaluminate cement clinker was prepared,which proposes a new way for exploring the high added value of iron tailings.The results showed that with the ratio of iron tailings,bauxite,calcined limestone,Al2 O3,CaSO4.2H2 O of 10∶ 17∶ 48∶ 15∶ 10 in the raw meal,and at the calcination temperature of 1 350 ℃ for 20 min,belite-sulphoaluminate cement clinker with major components of C4 A3 S,C2 S,C4 AF and f-CaO content of less than 1.5% was prepared.Then,natural gypsum and limestone were added into the clinker with the quality ratio of 8% to prepare the cement raw meal.With the cement-sand ratio of 1∶ 3,and water-cement ratio of 0.6,the cement-mortar product reached the compressive strength of 38.1 MPa,at 3 d,and 52.5 MPa at 28 d.
出处
《金属矿山》
CAS
北大核心
2013年第8期157-160,共4页
Metal Mine
基金
国家高技术研究发展计划(863计划)项目(编号:2012AA062405)
关键词
铁尾矿贝利特硫铝酸盐水泥
水泥熟料矿物成分
水泥胶砂抗压强度
Belite-sulphoaluminate cement of iron tailings
Mineral components of cement clinker
Cement-mortar compressive strength
