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Pig iron casting necessary considerations - Pig iron casting

by:XEX     2021-01-29
Form of carbon with flake graphite in cast iron casting, its fracture is gray, usually also called gray iron. Due to graphite soft, with lubrication, thus casting pig iron has good cutting, wear-resisting and casting performance. But its tensile strength is not enough, so can not be forged, can only be used in the manufacture of all kinds of castings, such as casting a variety of machine tool bed, iron pipe, etc. Pig iron casting small make up will come today to tell you about when the matters needing attention. Needed for pig iron casting note: 1, work check before furnace, furnace door, trailer, wire rope pulley and fan equipment is normal, such as collapse, fracture, cracking and other unsafe factors. If so, should be properly handled to furnace. Use electric furnace annealing should carefully clean up the resistance wire on or near the scale and metal. 2, the fire, carefully check the cast iron casting explosives in coal. Stop the wind process, coal may not be too thick, to prevent the gas explosion. Clean coal cinder to deal with at any time, no backlog piled up. 3, loading and unloading, check rail slot on the presence of obstacles, such as hook, chain tools is reliable. 4, loading and unloading of cast iron casting or thin-walled workpiece, be sure to cushion flat. Is a space between adjacent to appropriate, loading height shall not exceed the stipulated. 5, before, you should clean up the oven door on firebrick, refractory clay, and check whether cart mechanism works. 6, when carrying out and, irrelevant personnel shall not be close to flat car, on both sides to avoid sand or artifacts collapsed cuts. Around the furnace body rest or pile is prohibited. 7, work temperature higher than 400 ℃, ban use chain or wire rope hoist ( Or heat insulation measures) In order to avoid fracture after annealing. Use the crane lifting work item, should abide by traffic and hook work safety operation procedures. 8, when using a gas stove, shall comply with the gas firing order: first use compressed air to blow over in furnace gas, shut the compressed air valve, fire burning stick, micro gas nozzle valve, burning with nozzle after adjusting the compressed air and gas flow, fully burning. A ceasefire order on the contrary, it is forbidden to reverse the order. 9, oil furnace baking, firing order is: first, close the throttle, lit up a burning stick, slightly open the throttle, after burning, adjusting the air valve and throttle fully burning, ban & other; Wind pressure oil & throughout; 。 10, using pulverized coal fuel furnace, prohibited when there is something wrong with the blower or pipe cracked stove. Above points are the matters need attention in pig iron casting, so you can be sure to pay attention to when operating. Today small make up to you at this point, let's see you next time.
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