49results about How to "Improve furnace condition" patented technology

The invention relates to a melting method of the antimony blast furnace adopting oxygen-rich air. The melting method is characterized in that the oxygen produced by an air separation oxygen manufacture equipment or a liquid oxygen vaporizing device is transmitted into an air pipe at the front end or the back end of a blast fan through a pipeline, and mixed with air into oxygen-bearing oxygen-richair with volume concentration more than or equal to 22 percent according to a set proportion, and the oxygen-rich air is led into blast furnace through a blast hole. The melting method is suitable for processing various antimony bearing materials such as oxidized antimony ore, antimony sulfide ore, mixed sulfide-oxide antimony ore, jamesonite, recycled material during the antimony smelting, etc. which bear more than 15 percent of antimony; and the melting method is also suitable for processing the block or powder antimony material provided with various different appearances which is processedby balling. The bed processing ability of the melting method is enhanced by more than or equal to 50 percent, the coking rate is reduced by more than or equal to 40 percent, the iron ore rate is reduced by more than or equal to 40 percent, the comprehensive recycling rate for the antimony is up to 97 percent or more than 97 percent, the SO2 concentration in the waste gas is enhanced by 50 percentto 100 percent, and the better condition for the next waste gas desulphurization (or acid making ) processing and the standard discharging is provided.

The invention discloses a phosphorous pig iron desulfurizer used for casting a pre-roasting anode. The desulfurizer is prepared from the following raw materials by mass percentage: 2 to 4 percent of graphite, 35 to 45 percent of CaO, 3 to 5 percent of CaF2, 1 to 3 percent of Na2CO3, 40 to 50 percent of Na2SiO3, and 1 to 3 percent of FeO. By adopting the phosphorous pig iron desulfurizer used for casting the pre-roasting anode, the adding amount of the desulfurizer is 2.5 percent in each ton of phosphorous pig iron; when the desulfurizer is used in a 1.6-ton induction furnace, the produced phosphorous pig iron can meet use requirements on composition as well as performance, so that the speed of smelting the phosphorous pig iron in the induction furnace is quickened, the smelting time of thephosphorous pig iron is shortened, the electric energy is saved, and the smelting cost is saved by about 15 percent; moreover, good furnace conditions and operational conditions are kept for smelting, the working environment for workers is improved, and the labor intensity of the workers is lowered.

The invention provides a closed type calcium carbide furnace charging nozzle and a process for producing the same. The charging nozzle mainly comprises two groups of seamless external casings, seamless internal casings, water inlet pipes, water outlet pipes, communication pipes and bottom edge embedded flanges; the seamless internal casings are arranged in the seamless external casings; the bottom edge embedded flanges, the water inlet pipes and the water outlet pipes are arranged on the two groups of the seamless external casings respectively; and the two groups of seamless external casings are communicated with the communication pipes. The charging nozzle has the advantages of solving the problems of water leakage due to frequent breakage and frequent shut-down of the furnace for exchange, meeting the requirements on the charging production of a closed type calcium carbide furnace, effectively improving quality structure of material layers around electrodes, greatly improving furnace conditions (avoiding piling of materials on the outer side of the charging nozzle), making the materials keep a steamed bread-shaped charge surface around the electrodes, further effectively reducing thermal loss, alleviating the insufficiency of the materials in the central region of the furnace, reducing the temperature of the charge surface, reducing exposing areas of the electrodes, reducingthe thermal loss of electrode resistances, improving the quality structure of the material layers, contributing to improving the pre-heating of the furnace materials and forming a big crucible region, ensuring good furnace conditions, avoiding frequent occurrence of material stamping and material throwing, and further facilitating the technical operation and control of the furnace and high yield,high quality and low energy consumption of the furnace.