div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: · PRIMARY Increasing the energy efficiency of aluminium smelting Burner air preheating by means of a heat exchanger significantly reduces gas consumption src=https:reader030vdocumentinreader030viewer20220412025d4d463088c993a90e8b910dhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: · PRIMARY Increasing the energy efficiency of aluminium smelting Burner air preheating by means of a heat exchanger significantly reduces gas consumption src=https:reader030vdocumentinreader030viewer20220412025d4d463088c993a90e8b910dhtml5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 3button div class=ts-image amp-img class=ts-thumb alt=Page 3: · PRIMARY Increasing the energy efficiency of aluminium smelting Burner air preheating by means of a heat exchanger significantly reduces gas consumption src=https:reader030vdocumentinreader030viewer20220412025d4d463088c993a90e8b910dhtml5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdiv