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,可确定该物质为铁矾. 图5 赤铁矿渣中S的XPS谱 Fig. 5 XPS spectra of S in hematite precipitates 2.3 晶种浓度的影响 高温(200 ℃)虽更有利于赤铁矿的形成,促使铁矾溶解并最终转化成赤铁矿.但温度过高会使企业的经济成本增加,不利于赤铁矿技术推广及应用.为在较低温度(180 ℃)下获得纯净赤铁矿,研究了晶...光谱分析,结果如图12所示. 图12 200 ℃时赤铁矿渣的红外光谱图 Fig. 12 FT-IR spectra of hematite precipitates obtained at 200 ℃ 在900~1300 cm-1范围内的3个红外波段是SO42-的震动吸收峰,其对应着S-O键的拉伸震动.随着反应时间的延长,3个波段的透过率明显减弱,说明SO42-在渣中的吸......
Trans. Nonferrous Met. Soc. China 27(2017) 2715-2726 Transformation of hematite in diasporic bauxite during reductive Bayer digestion and recovery of iron Xiao-bin LI, Yi-lin WANG, Qiu-sheng ZHOU...: The reductive Bayer digestion by using iron powder as reductant is proposed to convert hematite to magnetite and further to dissociate iron minerals from sodium aluminosilicate hydrate (desilication......
Shear hydrophobic flocculation and flotation of ultrafine Anshan hematite using sodium oleate YIN Wan-zhong, YANG Xiao-sheng, ZHOU Da-peng, LI Yan-jun, L? Zhen-fu School of Resource and Civil... on the shear hydrophobic flocculation of ultrafine Anshan hematite with sodium oleate as the surfactant were discussed. The results show that these parameters significantly affect the shear hydrophobic......
University, Shenyang 110004, China Received 19 August 2010; accepted 29 November 2010 Abstract: The collecting performances of N-dodecylethylene-diamine (ND) to quartz and hematite were studied via single mineral flotation. Experimental results show that ND has stronger collecting ability to quartz than hematite. Different floatability of quartz and hematite was presented in the existence......
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Particle size distribution of hematite seed crystal 2.3 分析检测与计算 本实验研究,转化渣中铁,锌,硫等元素检测委托昆明冶金研究院分析测定,利用渣中硫残留率,锌浸出率进行表征,并利用XPS,红外光谱,XRD的精修结果即铁矾转化率和转化渣中Fe2O3的含量进行验证,铁矾转化率利用式(4)进行计算[27].  ...-xiong, LI Xing-bin. Iron-removal by hematite from leaching liquor of high iron sphalerite[J]. The Chinese Journal of Nonferrous Metals, 2014, 24(9): 2387-2391. [4] 翟秀静. 重金属冶金学[M]. 北京: 冶金工业出版社, 2013......
)11-2643-06 Formation and growth mechanism of magnetite during the fluidized reduction of hematite YU Jianwen, HAN Yuexin, LI Yanjun, GAO Peng (School of Resources & Civil Engineering, Northeastern... reduction of hematite was investigated by optical microscopy and scanning electron microscopy(SEM). The results show that the fresh magnetite nucleus are needle-like with different lengths......
活性石灰竖式冷却器用耐火材料的设计 姜琳1,孟庆辉1 (1.洛阳矿山机械工程设计研究院有限责任公司,河南,洛阳,471039) 摘要: 竖式冷却器是生产活性石灰成套设备的三大主机之一,其作用是用来冷却经回转窑煅烧而成的高温石灰熟料,使温度为1 100℃的高温石灰迅速冷却到100 ℃左右并逐渐排出冷却器,冷却风通过与物料的热交换能够回收高温石灰熟料中所带的热量,作为二次风供给回转窑参与燃烧.因此,竖式冷却器的内衬必须砌筑耐火材料,以抵抗高温作用. [全文内容正在添加中] ......
石灰竖窑筑炉工艺的改进 潘之雄1,陆福辉1,陆维城1,吕维枢1 (1.柳州钢铁(集团)公司耐火材料厂,柳州,545002) 摘要: 1 窑衬材质的选择(1)保温层:炉壳与永久层耐火砖之间的保温层可以选用硅酸铝耐火纤维毡贴砌在炉壳内壁,然后砌筑轻质粘土保温砖.保温砖可以根据窑衬设计衬砖厚度采用单层或双层砌筑.双层砖牌号最外层为NG-0.8,内层为NG-1.3b,单层砖一般选用牌号为NG-0.8. [全文内容正在添加中] ......
提高石灰竖窑使用寿命的措施 郝连君1,崔金琪1 (1.天津钢管公司,) 摘要:通过对石灰竖窑采取改进耐火材料材质,改造窑体结构及改进砌筑工艺等措施,石灰竖窑的使用寿命由原来的1年提高到了3年零5个月,产品的质量,产量和经济效益同时得到提高. 关键词:石灰竖窑; 耐火材料; 使用寿命; [全文内容正在添加中] ......