Weihe Chemical Fertilizer Plant originally used Huan-gling coal, but due to its high ash content and ash fusion point, it becamean obstacle in the long-term stable operation of the Texaco Gasifier.

• 渭河化肥厂原采用的黄陵煤由于煤质灰份含量及灰熔点偏高，影响德士古气化炉长周期稳定运行。