The preliminary success of the aluminum-gypsum aluminum composite deoxidizer was tried at the converter plant of Hangang Iron and Steel Co., Ltd., and the deoxidation and refining effects can be obtained while saving a large amount of refining costs. Aluminum ash is essentially a kind of production residue in the non-ferrous industry. The composition of the aluminum ash belongs to the phase analysis, that is, the Al (metal state) and Al2O3 (oxidation state) in the aluminum ash are first separated and then measured. The detection of aluminum ash is very difficult, because it can not guarantee the stability of its chemical composition, so there is no standard sample available in the country, there is no ready-made analysis method can be used for reference. How to develop an analytical method and at the same time verify the accuracy of this method is a challenge to the raw material station staff's innovation ability. The raw material station of the Technical Quality Department of Hangzhou Iron and Steel Co., Ltd. has set up a research team, and after more than 20 days, it has repeatedly conducted more than 200 tests and continuously summarized and explored. From the ignorance of the aluminum ash sample to the gradual perfection of analytical methods, the aluminum was captured. Difficulties such as ash dissolving, titration, separation, and determination have led to the formation of a simple and rapid method of operation, achieving accurate determination of the aluminum content in aluminum ash, the procurement of aluminum ash for the supply branch and the aluminum ash of the converter plant. Use provided the basis. After a rough calculation, using this set of analysis methods can save more than 50 yuan each time, while reducing the huge investment in the purchase of X-ray fluorescence diffractometer. After the converter plant uses aluminum ash instead of aluminum composite deoxidizer, the cost per unit of 1t of refined steel can be saved by 16.5 yuan.