Abstract: The Taguchi method was used to explore the important influence factors on the compressive strength of vanadium titanium magnetite hot briquettes， and then the contribution rates of these factors to the compressive strength were calculated through the signal-to-noise ratio analysis. Finally， the best preparation conditions of vanadium titanium magnetite hot briquettes were established. The results showed that among the three processing parameters including the hot-briquetting temperature， carbon ratio and coal particle size， the coal particle size was the most important factor to the compressive strength， and its contribution rate is up to 79.99%， the contribution rates of the hot-briquetting temperature and the carbon ratio were 15% and 3.63%， respectively. The optimized parameters of the preparation process of vanadium titanium magnetite hot briquette are as follow: hot-briquetting temperature 300℃， coal particle size less than 75μm， carbon ratio 1.8. Verification experiments were conducted with the optimized parameters， and the average compressive strength of the vanadium titanium magnetite hot briquette is up to 1152.1N.

Key words: Taguchi method, vanadium titanium magnetite hot briquette, compressive strength, signal-to-noise ratio, contribution rate