Converter smelting method with high scrap ratio and device thereof

The invention belongs to the technical field of metallurgy, and relates to a converter high scrap ratio smelting method and a device thereof.The converter shell is provided with an annular hole injection oxygen combustion gun, and the annular hole injection oxygen combustion gun is provided with an oxygen channel, a fuel gas channel and a powder channel; according to the adding amount of waste steel in the converter, the annular hole oxygen injection combustion gun extends out by a corresponding length, an oxygen channel and a fuel gas channel inject oxygen and fuel gas respectively, and the waste steel is heated after automatic ignition; stirring, heating and decarburizing the molten steel in the furnace; meanwhile, the powder channel blows corresponding powder according to requirements to treat molten steel components, and a continuous temperature measuring device is adopted to continuously measure the temperature of the molten steel in the process. The mode that the oxygen combustion guns are arranged on t