PRODUCT NEWS/產ռ新聞
Tupy has ordered a second sand regeneration plant from Fata Aluminum to install in another of its cast iron plants.
the two thermal exchange fluid beds. Tis way, before reach- ing the furnace’s calcination chamber, the air is preheated at a temperature very close to that of the calcinated sand, greatly reducing gas consumption. For example, with a calcination tem- perature of 700C, (1,293F) the air is preheated beyond 600C (1,112F). Furthermore, the calcinated sand cools down, thus reducing the size of the final fluid bed cooler and the relative demand for cooling water circulating in its tube bundle. As an example, with a calcination temperature of 700C, the sand is cooled to a temperature of about 300-350C (572-662F). Operational safety is provided by the two pilot burners
installed in the calcination chamber of the furnace, kept con- stantly lit and equipped with fire detector. Gas is only introduced in the furnace when the two burn-
ers are lit, guaranteed by specific nozzles on the fluidization plate, and proper operation of the intake and fluidization of sand in the furnace have been checked. Te gas and fluidization air then are mixed inside the fluid bed of the calcination chamber, and the flame of the pilot burners lights it and controls it over time. The thermal treatment transforms the active residual
bentonite in the sand to be processed into dead and oo- litic bentonite and burns all the coal and resins contained in the sand. Te dead and oolitic bentonite still in the sand then is eliminated with a mechanical treatment carried out in a pneumatic attritor manufactured by Fata Aluminum, with the addition of a final sand dust remover/cooler. Tis final conditioning plant also works with the fluid bed
principle. It consists of a cooler/dust remover connected to the sand outlet from the attritor and is supplied with a tube bundle with water circulating in it, coming from a specific refrigeration system. Te mechanical treatment removes the bentonite, and the ensuing dust removal with cooling provides the metalcasting facility with a regenerated, thermally conditioned sand with as little fines as possible. Te fines in the sand must be as few as possible as their
presence increases the resin demand for forming the cores, therefore increasing the volume of the gases developed upon casting. It also tends to decrease the permeability of the core, increasing issues related to the development of gas at casting.
:[V_ 现Ձђ,GZG 'R[SOT[SҸ ՛订购д一套砂子Ӈ生装置，ઋ Ӧ安装ӱՐ一З铸铁Դ。
מдѺ降Їچ३ם很，چ温 果ײ，પ来҆Р。৴消气然 ℃，空气ѫ 是چ温烧煅 预热ӱ ℃љЇ。
Ӓѫ子砂ङ烧煅，יՐ 床化流ৄ最شӗਈ此֜，却 管ثصӗ并，ت尺ङ֘却Ӓ 需ثबङ水却Ӓङ环循И束 是چ温烧煅果ײ，ײ҆。求 ℃，砂子ਈӒ却ӱ ℃左右。
煅烧炉煅烧室И安装ङД 并，ہ状燃点йה֘燃引Ֆ ચґלਈ，֘测检灾火有配 运੧安Ҷ。
来֗֕殊特ङЇ板化流ं（燃点֘燃引ՖД这当有Ց ґચ），并Ќ已检查े定进气Ս正常工ҁչ砂子流化ҁ 。气然מҵحӄ炉էѫ۵ե常正用 ，合混ӄ床化流ङ室烧煅֨气空化流չ气然מ，ե然 气合混થӲ控ӄ间时段一֨并燃点它ر焰火ङ֘燃引 ѽ。
活无О化转֦润膨性活ѿ残ङИ子砂理ה待ر理ה热 Ҷ完脂树չ煤有۱ङИ子砂ر并，֦润膨状㈏ট鲕ङ性 燃烧。 砂子 ֘ظ除子砂有٫ङ造Ӳ ҅用 ,GZG 'R[SOT[S
砂除ԾљՕ，理ה械机੧进子砂ث机ॊ磨动气ङ֘却Ӓ 。֦润膨状㈏ট鲕ङ性活无ङऊ残И子 最ৄલਭ装置Њ流化床ङ工ҁԽ理一样。它包括一Ֆ
环循խӄו配，֘ظ除 ֘却Ӓङ接连Ս砂ӟ机ॊ磨Њ 水ङ管束，这пӒ却水来ਘ特ӲङӲӒ系统。 却ӒङեФՃљ，֦润膨ङИ子砂д除Ծ理ה械机
ঞङ量ص最有խ砂理ה热生Ӈङӱ得Դ造铸ґे，ظ除 末。
加增ѫ末ঞО֜，Ѻ最ਙ降须必量խ末ঞङИ子砂 Օ还。ѽ气ङ生фў铸加增此ं，脂树ङ需۱型成ਯ砂 问ङѽ气生фИў铸дך增就Э，性透渗ङਯ砂Ѻ降ਈ 题。 ظ除չҵ吸ਙ送ੴѫ都ظঞ有۱ङ生ф段阶ਫ工有۱
June 2016
FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION | 55
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