Fig. 4. The distributor plate features mouse holes to prevent clogging.


ӣ配板ગ有鼠 ֣ 洞，防止堵塞。


batches of furan bonded chromite that produced good surface quality. Te goal was to be making furan bonded chromite/silica molds with reclamation by April 2014, while continuing full production. Te new molding lines required relocating the plastic injection equipment, pattern shop and manga- nese casting processing from cleaning through shipping. voestalpine Nortrak arranged for the new core mixer (120 lbs./min.) to be delivered by August 2013 to increase the scale of the molding trials and be able to run small track- work molds with furan bonded new chromite facing and furan bonded new silica backing. Te project timeline for the sand system changeover was


initially estimated to take roughly seven months from proj- ect approval, though it ended up requiring a full calendar year. Te project delays were mostly due to infrastructure issues not related to the sand system change. Because the new olivine and reclaimed olivine/silica silos


were planned to be used for reclaimed chromite and silica storage, the old sand system had to be shut down before the new one could operate. A two-week shutdown was sched- uled for March 2014. Te 1,200 lb./min. mixer (Fig. 2) was installed just


before the Christmas shutdown. Day bins were being filled by crane from supersacks to enable equipment debug- ging. Chromite/silica shakeout sand from these test molds was being segregated from the ECP-bonded olivine/silica production molds until the shutdown, when it could be processed through the new cooler/classifier for transport to the 35-ton silo located above the new magnetic separator. Te magnetic separator is the crucial piece of equipment for the chromite/silica reclamation system.


接ՕЉ生ф量ૅ面੮ў铸ثرөի，锰酸硅生ф面੮ Չङ影ր;


铬铁矿砂用呋喃树脂ҁОডৈ剂ङ初步ડ验Շ现д


并，Ӑઆӱ得题问п这。题问ङ间时化֡ङӱ料预有没 联钢奥。险风ङ裂开ङ生ф剂ৈড脂树喃呋用҅֜Ѻ降 4UXZXGQҸ՛还҅用呋喃树脂ডৈ剂ङ铬铁矿砂О面砂 。ױਧ量ૅ面੮սф，ў铸૨铁ङ磅 ҟдәЗ重 Ҹ՛ङऩ标是ӱ 年 月，҅用ՕӇ生ङ呋喃树 脂ডৈ剂ङ铬铁矿砂 硅砂造型，գ时持续ङ满િਾ生 间车Ӏ模，וગ塑注料塑迁搬要需装安ङি型造新。ф 铁型شО并，模ઁङি型造ם扩дО。部工造铸钢锰չ ૨铸ўङ生ф提供呋喃树脂ডৈ剂ङ铬铁矿面砂չ新硅 年 月安装д新ङ ֨՛ҸQGXZXU4联钢奥，砂ਅ砂 ਯ砂混砂机（ 磅 ӣ钟）。 最初，更换砂系统ङ项ऩђ项ऩੂ批开始预ઋ需要


З月，最ৄ项ऩ完成用д一整年。થ项ऩ延期П要是ं 。Ҽ无换更ङ统系砂Њ，题问ङ施ગॅׂй 硅砂料斗已 砂ी榄橄生Ӈչ砂ी榄橄新ङ来ԽО֜ ҁ始开统系新֨，砂硅չ砂矿铁铬ङ生Ӈҥ存й用Ӧઋ Џӹ，Љ得ЉҼ闭旧砂系统。Ҡф定й 年 月，О 期Дյ。


ӹ期ҝਭણ֧֨ӪӪ） ֣（机砂混ङ钟ӣ 磅 时ડ测。ડલוગґे，斗料满装机重起过通。装安


Fig. 5. The penetra- tion with the oliv- ine/magnesite wash (left) was improved with the magnesia wash (right).


橄榄ी ् ֣ 铁矿涂料（左） 化氧用ե֑改Њ 镁涂料（右）ङ 。比ث


50 | FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION June 2016


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