No. of patent: ZL69222909.1 1.Special furnace model design, compound type chamber wall, high efficient burner , heat exchanger and the heating mode with direct fire make thermal efficiency improve nearly one times than traditional steel wire heating treatment, target of energy loss reaching international advanced level. 2. Exact temperature controlling , furnace inner atmosphere controlling and high value of DV operating make loss rate of oxidized to reduce to 40? 3. Special blocking design of oil feeding and control manner of delivery pump (No. of patent, ZL96222909.1), make the error of furnace temperature control extremely minimal. 4. Novel setting, control and display of temperature, air-fuel ratio (a modulus), makes computer control system operated easily. 5. Do not produce black smoke and pollution to environment. 6. Special furnace frame makes working life longer, minor repair cycle for 3 years and 10 years of heavy repair cycle. Technical parameter Item Designed value Measured value fuel diesel/gas diesel heating mode clear-sighted fire heating clear-sighted fire heating dia. Of wire 2.0-8.0mm 3.0-6.5mm count of steel wire 20-40 radix 24 radix annual output 0.8-3.0 ten thousand ton 1.0-2.0 ten thousand ton Item Designed value Measured value DV 40-70 50-60 consumption of energy source 32-36kg/t 30kg/t loss rate of oxidized 6? 4? length of furnace 16-24m 18.5m inner width of furnace 1150-2200mm 1392mm