7 results about "Electric furnaces" patented technology

The invention discloses a processing technology of an iron-chromium-aluminum resistance wire, and relates to the metal processing field; the processing technology includes five technology steps of raw material selection, heating melting, casting molding, cold drawing and annealing treatment; iron, chromium, aluminum, rhenium, molybdenum and the like are selected as processing raw materials, can improve a highest use temperature of the iron-chromium-aluminum resistance wire and increases the service life; the raw materials are powdery so as to facilitate uniform mixing; the raw materials are put into an induction furnace and subjected to heating melting, the heating speed is fast, the production efficiency is high, the material utilization rate can be improved, and production costs are saved; after the resistance wire is subjected to annealing treatment in an electric furnace, the tensile strength of the resistance wire can be enhanced, and the mechanical properties are improved.

The invention discloses a low-aluminum and low-silicon welding wire steel low-sulfur-control smelting method. After an electric furnace steelmaking is completed, alloying is carried out, the tapping quantity is controlled during the electric furnace tapping, and the electric furnace retains steel; stirring is carried out after tapping, and slags are poured out after stirring; the slags are placedin a refining furnace, after active lime and fluorite are added in batches, power supply slugging refining is carried out, after refining is carried out, active lime and fluorite are re-added, a deoxidizing slag-forming agent is added for diffusion deoxidation, metal manganese is added for supplementary for adjusting manganese content after sampling and analysis are carried out, after the power supply heating is carried out, the deoxidizing slag-forming agent is used to continue to diffuse and deoxidize to maintain white slag, when the temperature reaches 1615-1630 DEG C, sampling and analysisare carried out, when the mass percentage content of aluminum is small than or equal to 0.010%, the mass percentage content of silicon is small than or equal to 0.05, the mass percentage content of sulfur is small than or equal to 0.003%, and the manganese content is qualified, pure calcium rod cored wires are fed, and after the calcium is fed, static stirring is carried out for more than or equal to 15min; and after the temperature reaches 1595-1610 DEG C, continuous pouring is carried out, and thus low-aluminum and low-silicon welding wire steel is obtained.

The invention discloses a method for producing environmentally friendly high-temperature fold-resistant high-strength high purity corundum bricks, wherein various particles are prepared, are mixed according to specific compositions and are put into a mixing mill, are uniformly mixed by adding with binding agents, mixed materials are vibrated and casted to be blanks, and the blanks are dried after being maintained for 12-15 hours in a green house, are placed into a high-temperature electric resistance furnace to burn in 1100-1200 DEG C after being dried, and are kept in warm for 3-4 hours. The method for producing environmentally friendly high-temperature fold-resistant high-strength high purity corundum bricks can greatly reduce the dosage of alpha-aluminum oxide (Alpha-Al2O3) nanometer powder, reduces firing temperature simultaneously, and greatly improves high temperature fold-resistant strength corundum bricks.

The invention discloses a red copper tube melting furnace which comprises a melting furnace, a holding furnace, an up-drawing furnace, crystallizers, a traction machine, a speed regulating device, a cooling water system and an electrical system that are all arranged on a machine body according to general technologies, wherein, the melting furnace and the holding furnace are communicated in parallel and the crystallizers are connected with the holding furnace by the up-drawing furnace. The invention is characterized in that 8-10 crystallizers are divided into two rows and arranged on the machine body, the lower ends of the crystallizers are connected with the up-drawing furnace and the upper ends thereof are connected with the traction machine by a red copper tube. The red copper tube melting furnace of the invention ensures that the daily output is increased from the original 6 tons to 8 tons under the condition of the same electrical furnace power, the using efficiency of the machine can be brought into play, in addition, the service life of the device can not be influenced, the energy resource consumption can be reduced and more than 1600 degrees electricity can be saved one day.

The invention discloses a full-tooth continuous quenching method of a slewing bearing, which comprises the following steps: (1) selecting equipment and raw materials: preparing an electric furnace, a filter press, a dissolving tank, a single-effect evaporator, a filter screen, an extraction tank and a steam boiler, and preparing rare earth fluorescent powder waste, caustic soda flakes, hydrochloric acid, a P507 extraction agent, water, caustic soda liquid and kerosene; and placing the mixed mixture in an electric furnace for calcining. According to the full-tooth continuous quenching method for the slewing bearing, the caustic soda flakes are utilized and subjected to low-temperature roasting in the electric furnace, so that the caustic soda flakes react with the caustic soda flakes, rare earth elements in the rare earth fluorescent powder waste are converted, and therefore the subsequent reaction is not direct reaction of the rare earth elements and acid, but neutralization reaction of the converted alkaline substances and the acid is achieved; the reaction can be quicker, so that the reaction efficiency is greatly improved.