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一、筒体焊缝技术要求: ∮3.5M球磨机的筒体外径∮3.5M,长度11M,用厚度为30mm、40mm的A3钢板制造。机械性能:σ_b≥38 Kg/mm~2σ_s≥24 Kg/mm~2δ_5≥25 2.冷弯性能:经120°冷弯试验无裂纹。二、远红外板式加热器: 板式加热器如图1所示。 1.发热体:选用截面为1.8mm×10mm的OCr25Al 5的电热合金带12条,以9毫米间隙平行并列,构成420mm×220mm的发热面。在发热体正面涂刷HS-1-2型辐射涂料,背面涂以磷酸铝作粘结剂的氧化铝(A1_2O_3)
First, the technical requirements of the barrel weld: ∮ 3.5M ball mill barrel diameter ∮ 3.5M, length 11M, with a thickness of 30mm, 40mm A3 steel manufacturing. Mechanical properties: σ_b ≥ 38 Kg / mm ~ 2σ_s ≥ 24 Kg / mm ~ 2δ_5 ≥ 25 2. Cold-formed properties: no cracks after 120 ° cold-bending test. Second, far-infrared plate heater: Plate heater shown in Figure 1. 1. Heating element: 12 strips of OCr25Al 5 with a cross-section of 1.8mm × 10mm are used, and parallel with 9mm clearance to form a 420mm × 220mm heating surface. HS-1-2-type radiation coating on the front of the heating element, coated with aluminum phosphate as a binder on the back of the alumina (A1_2O_3)