Rotary Kiln technology to optimize the use of sulfuric acid method aspects, and improving economic efficiency.Use of waste acid for acid hydrolysis process is actually to reduce costs, enabling customers to earn more cost. Increase the amount of spent acid leaching process.The original material plus a can of 3.5m3 acid solution in the leaching process; spent acid to adjust the F value, taking into account the excess sulfuric acid hydrolysis reaction stage, can be reduced, but in order to ensure that the final solution partner titanium F value can be increased leaching process, increase the amount of waste sulfuric acid.The reaction by reducing the amount of sulfuric acid 0.3m3, the amount of waste acid to 9.0m3 / cans.Paute acid hydrolysis rate remains above 96%, the stability and F values ​​are qualified. Water use will lead to acid hydrolysis of waste acid.Acid hydrolysis reaction initiator needs water, and titanium dioxide production process to produce large quantity of waste sulfuric acid content of 18-20%, with waste sulfuric acid instead of water, you can reduce the amount of sulfuric acid.According to calculations, the 3.6m3; alternative waste sulfuric original 3m3; industrial water, reduce 0.4m3; After sulfuric acid production is normal.Acid hydrolysis rate of more than 96%, other indicators did not change the process.