Abstract
Shell powder was used as coal briquette sulfur-fixed agent. Orthogonal testing method was used to study the main factors which have influences on the desulphurization ration. Its desulphurization ration is 56.6% at 1150°C, and it increased above 40% than CaCO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> . The main component of shell powder is CaCO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> . It also has high alkali metal such as Na and K, and other elements of iron, aluminum and silicon. The cinder which generated at 1150°C by coal was studied by XRD, and the mechanism that the shell powder has high desulphurization ration under high temperature is discussed. CaAlSi <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">8</sub> which is composite crystal is found in cinder. CaSO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> is covered by it at high temperature, then the decomposition of CaSO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> is suppressed. And the desulphurization ration is improved.
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