摘要:
A method of producing an extremely thick insulation coating on a surface of an electrical steel, comprises the following steps: 1) preparing a coating liquid- stirring sufficiently the coating liquid for 0.1∼4 hours, with the viscosity of the coating liquid being within 10∼80S; 2) coating a strip steel - using a double-roller or a tri-roller coating machine, wherein the film thickness and evenness can be controlled by adjusting different parameters; 3) baking the coating - using three sections, that is, a drying section, a baking section and a cooling section, to bake the coating, wherein the temperature in the drying section is 100∼400°C, the temperature in the baking section is 200∼370°C; the time in the whole drying and solidification section is 33∼144seconds, wherein the time in the drying section is 9∼39seconds, and the baking time is 24∼105seconds; wherein in the baking process, the strip steel having been coated is conveyed in a non-contact way, in particular, the strip steel is conveyed by blowing pressure-adjustable air onto the lower surface to make it float; the air pressure is 0∼2000Pa; the wet film is kept out of contact with the furnace rollers before it is solidified, guaranteeing that the surface of wet film is intact; 4) online detecting the film thickness.
摘要:
A hot rolled slab impact type mechanical scale removal device comprises a front cooling water nozzle group (4), an impact type scale removal gear roller group (5), a roller cooling device (6) and a cleaning water nozzle group (9). A slab (1) moves on a slab roller table (3). The front cooling water nozzle group (4), the impact type scale removal gear roller group (5) and the cleaning water nozzle group (9) are arranged in sequence along the movement direction of the slab. The impact type scale removal gear roller group (5) is arranged on a support seat (8). The cooling water nozzle of the roller cooling device (6) is arranged corresponding to the impact type scale removal gear roller group (5). According to the scale removal device, the oxide skins can be clearly removed, the temperature of the continuous casting slabs can be reduced and the hot rolling quality is improved.
摘要:
The present invention refers to a chromium-free insulation coating material for non-oriented silicon steel, comprising, by mass shares, the following components: metal dihydrogen phosphate salt of 100 shares, epoxy resin of 10~60 shares, naphthenate drier or isooctanoate metal salt drier of 0.001~10 shares, organic solvent of 0.001~100 shares and pure water of 60~2000 shares. The metal dihydrogen phosphate salt is Al(H 2 PO 4 )3, Mg(H 2 PO 4 ) 2 , Ca(H 2 PO 4 ) 2 or Zn(H 2 PO 4 ) 2 ; the epoxy resin is water- soluble epoxy resin or epoxy resin emulsion. Chromium-free insulation coating material of the present invention, after being coated on non-oriented silicon steel, renders highly transparent appearance, and has excellent insulativity, corrosion resistance, adhesiveness, weldability and manufacturability, so as to eliminate defects of the existing chromium-free coating, such as sticky and un-wear-resistant and to meet environment protection requirements.
摘要:
A method for controlling furnace temperature of a fired heating furnace is disclosed, comprising: measuring furnace temperatures to obtain furnace temperature feedback values; calculating the differences between furnace temperature setting values and the furnace temperature feedback values as discrepancy values DV 1 , in accordance with the furnace temperature feedback values and the furnace temperature setting value; calculating the differences between the furnace temperature setting values and the furnace temperature feedback values in a unit time, i.e., the gradient of furnace temperature change values, as discrepancy values DV 2 ; obtaining a speed V of a fired heater machine set from a speed adjuster of the fired heater machine set, and obtaining a first multiple feed forward output components FF V in accordance with the speed V of the machine set (V); obtaining a second multiple feed forward output components FF T in accordance with the differences between the furnace temperature setting values and the furnace temperature feedback values, i.e., the discrepancy values DV 1 ; looking up a PID control parameter in accordance with the discrepancy values DV 1 and DV 2 , based on fuzzy control rule, and creating an adjusting control parameter OP 1 in accordance with the PID control parameter; controlling a valve for regulating coal gas flow and a valve for regulating air flow by combining the adjusting control parameter OP 1 with the first multiple feed forward components FF V and the second multiple feed forward components FF T as a final control output value.
摘要:
A manufacture method of high-efficiency non-oriented silicon steel with excellent magnetic property, which comprises the following steps: 1) smelting and casting; chemical compositions of non-oriented silicon steel, by weight percent, are: C≤ 0.0040%, Si:0.1∼0.8%, Al:0.002∼1.0%, Mn:0.10∼1.50%, P:≤0.2%, Sb:0.04∼0.08%, S≤0.0030%, N≤0.0020%, Ti ≤ 0.0020%, and the rest is Fe and unavoidable inclusions; molten steel in accordance with the above compositions is smelted and then casted into billets; 2) hot-rolling and pickling; heating temperature for slab is 1100 °C~1150 °C and finish-rolling temperature is 860 °C ∼920 °C; after rolling, the hot-rolled product is air cooled, during which air cooling time t: (2+30xSb%)s ≤t≤7s; thereafter reeling at a temperature ≥720°C ; 3) cold-rolling; rolling to form cold-rolled plate with target thickness at a reduction ratio of 70∼78%; 4) annealing; heating up the cold-rolled plate to 800∼1000 °C at heating rate of ≥ 15 °C/s, and holding time is 10~25s. Under the precondition to ensure magnetic properties, this invention implements low cost manufacture of high efficiency electric steel by adding elements advantageous to favorable texture during steel making, controlling contents of adverse elements and coordinating air cooling time control during hot-rolling with high temperature reeling.
摘要:
Abstract: A manufacture process of non-oriented silicon Steel with high magnetic induction comprising the procedures: 1) smelting and casting: the steel's chemical compositions by weight percent: Si 0.1~1%, Al 0.005~1.0%, C ≤ 0.004%, Mn = 0.10~1.50%, P ≤ 0.2%, , S ≤0.005%, N ≤0.002, Nb+V+Ti ≤0.006%, and the rest is Fe; molten steel is smelted and secondary refined and then casted into a billet; 2) hot-rolling: the billet is heated to 1150~1200°C, and then hot-rolled into a plate at finish-rolling temperature 830~900 °C , at a temperature ≥ 570°C, and is coiled; 3) flattening: the plate is cold-rolled at compression ratio 2~5%; 4) normalization: the plate is normalized at temperature not below 950°C for 30~180s; 5) pickling and cold-rolling: the normalized plate is pickled, and then is successively cold-rolled several times at total compression ratio 70~80% into a sheet with thickness of finished product; 6) finish-annealing: the cold-rolled sheet is quickly heated to 800~1000 °C at temperature rise rate ≥ 100°C/s, and soaked for 5~60s, thereafter, cooled slowly to 600~750C, then left to cool naturally. The manufacture process can raise magnetic induction of non-oriented silicon Steel by at least 200 Gauss without increasing iron loss.
摘要:
A steel slag treatment equipment by barrel method is described, comprising left and right barrel bodies (2, 3), flow branching pan (9), mandrel (6), mandrel feed funnel (13), wherein between left and right barrel bodies (2, 3) there is placed a flow branching pan (9), opposite which is the opening end of barrel body (2, 3), over the flow branching pan (9) is mounted a feed funnel (13), below flow branching pan (9) is mounted a retaining ring (12), mandrel (6) is fixedly connected to left and right barrel bodies(2, 3). Outside the left and right barrel bodies (2, 3) at two ends of mandrel (6) are mounted supporting bearings (4), the left and right barrel bodies (2,3) are divided into outer (2) and inner (3) portions.
摘要:
The present disclosure relates to an insulating coating, which comprises the following components: a water-soluble metal inorganic salt A containing a water-soluble phosphate A1, which comprises a water-soluble phosphate of at least one of aluminum, zinc, magnesium and manganese; a water dispersible organic emulsion B, which comprises at least one of an epoxy emulsion and a curing agent thereof, polyester, polyurethane, polyacrylate and an ethylene-vinyl acetate copolymer; an additive C, which comprises at least one of a structure reinforcing additive C1 and a heat-resistance reinforcing additive C2, wherein the structure reinforcing additive C1 comprises an inorganic nanoparticulate matter, and the heat-resistance reinforcing additive C2 is selected from at least one of boric acid and a water-soluble salt of molybdenum, tungsten, vanadium or titanium; an auxiliary agent D1 and a solvent D2, wherein the solid content ratio of the water-soluble metal inorganic salt A to the water dispersible organic emulsion B is (35-85) : (15-65) in part by mass. In addition, the present disclosure further relates to a silicon steel plate, and the surface of the substrate thereof is provided with a coating layer formed by the insulating coating of the present disclosure.