RECOVERY OF TELLURIUM FROM SODIUM CARBONATE SLAG

被引:0
|
作者
Kucharski, M. [1 ]
Madej, P. [1 ]
Wedrychowicz, M. [1 ]
Sak, T. [1 ]
Mroz, W. [1 ]
机构
[1] AGH Univ Sci & Technol, Dept Met Nonferrous Met, PL-30019 Krakow, Poland
关键词
tellurium recovery; crude silver; refining; sodium carbonate slag;
D O I
10.2478/amm-2014-0009
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
This study is devoted to tellurium recovery from sodium carbonate slag, formed in the fire refining process of crude silver. The slag was modified by silica additions and then reduced by carbon oxide. The degree of the slag modification was defined by the parameter kw: kw = n(SiO2)/n(Na2CO3) + n(Na2O) where: n(i)- the mole numbers of silica, sodium carbonate and sodium oxide. The compositions of the investigated slag determined by the parameter kw and the mole fraction of the tellurium oxide (x(T is an element of O2)) are given in the following Table. [GRAPHICS] The reduction of tellurium was very fast for all the investigated slags, which was manifested by an almost complete conversion of CO into CO2. Unfortunately, at the same time, a side reaction took place, and as a results sodium telluride was formed, which reported to the slag: (Na2O)(slag) + Te-(g) + CO = (Na2Te)(slag) + CO2 The tellurium content in the reduced slag decreases as the parameter kw increases, and only the slag with the kw equal unity was suitable for the tellurium recovery in form of dusts, containing more than 76 wt-% tellurium.
引用
收藏
页码:51 / 57
页数:7
相关论文
共 50 条
  • [21] RECOVERY OF SODIUM CARBONATE FROM SAMBHAR LAKE BITTERNS - PHASE RULE APPROACH
    VYAS, SN
    INDIAN JOURNAL OF TECHNOLOGY, 1978, 16 (03): : 118 - 120
  • [22] RECOVERY OF SODIUM FROM ALUMINA-EXTRACTED FLY ASH USING CONCENTRATED SODIUM CARBONATE SOLUTION
    Wang, Z.
    Zheng, S.
    Ma, S.
    Ding, J.
    Wang, X.
    JOURNAL OF MINING AND METALLURGY SECTION B-METALLURGY, 2018, 54 (02) : 225 - 232
  • [23] Assessing the chemical involvement of limestone powder in sodium carbonate activated slag
    B. Yuan
    Q. L. Yu
    H. J. H. Brouwers
    Materials and Structures, 2017, 50
  • [24] Sodium carbonate activated slag as cement replacement in autoclaved aerated concrete
    Yuan, B.
    Straub, C.
    Segers, S.
    Yu, Q. L.
    Brouwers, H. J. H.
    CERAMICS INTERNATIONAL, 2017, 43 (08) : 6039 - 6047
  • [25] A cleaner production of sodium hydrogen carbonate: partial replacement of lime by steel slag milk in the ammonia recovery step of the Solvay process
    de Carvalho Pinto, P. C.
    de Oliveira Carvalho, M. M.
    Linhares, F. M.
    da Silva, T. R.
    de Lima, G. M.
    CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY, 2015, 17 (08) : 2311 - 2321
  • [26] Assessing the chemical involvement of limestone powder in sodium carbonate activated slag
    Yuan, B.
    Yu, Q. L.
    Brouwers, H. J. H.
    MATERIALS AND STRUCTURES, 2017, 50 (02)
  • [27] Ultra-fine slag activated by sodium carbonate at ambient temperature
    Zhang, Junjie
    Tan, Hongbo
    Cai, Lixiong
    He, Xingyang
    Yang, Wen
    Liu, Xiaohai
    CONSTRUCTION AND BUILDING MATERIALS, 2020, 264 (264)
  • [28] A cleaner production of sodium hydrogen carbonate: partial replacement of lime by steel slag milk in the ammonia recovery step of the Solvay process
    P. C. de Carvalho Pinto
    M. M. de Oliveira Carvalho
    F. M. Linhares
    T. R. da Silva
    G. M. de Lima
    Clean Technologies and Environmental Policy, 2015, 17 : 2311 - 2321
  • [29] Alkali-activated slag cements produced with a blended sodium carbonate/sodium silicate activator
    Bernal, Susan A.
    San Nicolas, Rackel
    van Deventer, Jannie S. J.
    Provis, John L.
    ADVANCES IN CEMENT RESEARCH, 2016, 28 (04) : 262 - 273
  • [30] Recovery of calcium carbonate from steelmaking slag and utilization for acid mine drainage pre-treatment
    Mulopo, J.
    Mashego, M.
    Zvimba, J. N.
    WATER SCIENCE AND TECHNOLOGY, 2012, 65 (12) : 2236 - 2241