2.Experiments prove that 20%～50% of detitanizing efficiency can be achieved by 10～30kg/t of steel rolled ironscale used as desiliconizing agent and spreading method adopted in iron runner at the same time to desiliconize.
3.According to test results,if the etch waste liquid with a pH value of -2.50 and 8.50 are mixed. When the pH value is maintained between 0.5～2.0,the cuprum could be displaced and recycled as spongy copper as a result of the 30-minute-reaction after adding of the DH-Ⅱ reagent and ironscale;
6.If high concentration of iron is in the injection water and a little of oxygen is dissolved in the water of shallow well, and the action of the iron bacteria and oxygen, the mixed scale of Fe(OH) 3 and Fe 2O 3 are produced on the surface of the water supply lines.
7.This article introduced several kind of different types railroad track scale technology which applies in Japan YAMATO large-scale iron and steel enterprise,reflects nowadays Japan metallurgy industry railroad track scale technology development and application from a side.
