Metallurgical & Chemical Engineering, Volume 10

acid American amount applied base become body bottom capacity carbon carried cells cent charge chemical closed Company concentration conductivity connected considerable containing continuous copper cost cyanide determined discharge effect electric electrodes engineering experiments fact furnace give given gold heat important increase industry interesting iron lead less loss lower manufacture material matter means measured metal method mill mining necessary obtained operation oxide pass patent pipe plant plates possible practice present pressure problem quantity reduced removed resistance roasting roll separation shown silver slag slime solution square standard steam steel sulphur surface taken tank temperature tion tons treated treatment tube United various weight zinc