複雑硫化精鉱の酸素加圧浸出処理における真鍮屑および粉銅添加の影響

DOI Web Site Web Site 被引用文献1件

書誌事項

タイトル別名
  • Effects of addition of Brass Chip and Copper Powder on Oxygen Pressure Leaching of Complex Sulphide Concentrate
  • フクザツ リュウカセイコウ ノ サンソ カアツ シンシュツ ショリ ニ オケル シンチュウクズ オヨビ コナドウ テンカ ノ エイキョウ

この論文をさがす

抄録

In previous paper, it was reported that in oxygen pressure leaching of complex sulphide concentrate (-200 mesh) which contained 10 pct Cu, 20 pct Zn, 20 pct Fe and 35 pct S, most of copper and zinc could be extracted using water as leaching solution. In this case, increase of pulp density resulted in more generation of sulphuric acid and iron content in leached solution also increased with increase of sulphuric acid. The pressure leaching, therefore, has been carried out with addition of either brass chip or copper powder as solid buffer under the following conditions: pulp density: 16.7 pct solid temperature: 185°C total presssure: 30 or 40 kg/cm2 (oxygen partial pressure: 18.5 or 28.5 kg/cm2) leaching time: 1-8 hrs brass chip or copper powder: 0-120g/lThe results obtained are as follows:<BR>1. Adding brass chip by one-third of the weight of sulphide concentrate, leaching under the previous conditions provides copper and zinc extractions of over 95 pct in 1 hr, besides acidity and iron in the leached solution decrease.<BR>2. Adding the copper powder by one-fifth of the weight of sulphide concentrate, leaching under the previous conditions provides copper and zinc extractions of over 95 pct. The concentration of sulphuric acid and iron in the leached solution decrease to 1/2and 1/4 respectively, compared with leached solution treated without copper powder.<BR>3. Iron content in leached solution depends on the following equilibrium equation: Fe2 (SO4) 3+3H2O→Fe2O3+3H2SO4.<BR>The relation between the concentrations of iron and sulphuric acid in it under these experimental conditions is as follows: log [Fe] =3.02 log [H2SO4]-4.73<BR>4. Assuming that the following chemical equations can be established for formation of sulphuric acid sand dissolution of copper powder, and that most of copper in the sulphide concentrate consists of chalcopyrite, 2FeS2+71/2O2+4H2O=Fe2O3+4H2SO4 (formation of sulphuric acid)<BR>2CuFeS2+81/2O2+2H2O=2CuSO4+Fe2O3+2H2SO4 (formation of sulphuric acid)<BR>Cu+H2SO4+1/2O2=CuSO4+H2O (dissolution of copper powder), the weight of copper powder calculated from iron content of sulphide concentrate is almost consistent with t he experimental results.

収録刊行物

  • 日本鑛業會誌

    日本鑛業會誌 80 (907), 21-27, 1964

    一般社団法人 資源・素材学会

被引用文献 (1)*注記

もっと見る

詳細情報 詳細情報について

問題の指摘

ページトップへ