during the eighties sider began to be interested in the ...during the eighties sider began to be...

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Sand/silicate reclaiming Sand/silicate reclaiming plants During the Eighties Sider began to be interested in the study of the moulding process with sand/silicate and to the consequent regeneration of sand. In 1987 it realized the first plant for the reclamation of sand bonded with sodium silicate. The continuous development of the technology in the following years has carried today Sider Technology to plan and construct systems allowing to reclaim till more than 90% of the used sand. Sider Technology s.r.l. Viale Giovanni XXIII, 108 - 21015 Lonate Pozzolo (VA) - Italy Tel. +39 0331 661673 - Telefax +39 0331 661638 E-mail: [email protected] Sider Technology Rev. 2 - 31/09/09

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Page 1: During the Eighties Sider began to be interested in the ...During the Eighties Sider began to be interested in the study of the moulding process with sand/silicate and to the consequent

Sand/silicate reclaiming

Sand/silicate reclaiming plants

During the Eighties Sider began to be interested in the study of the

moulding process with sand/silicate and to the consequent

regeneration of sand. In 1987 it realized the first plant for the

reclamation of sand bonded with sodium silicate.

The continuous development of the technology in the following

years has carried today Sider Technology to plan and construct

systems allowing to reclaim till more than 90% of the used sand.

Sider Technology s.r.l. Viale Giovanni XXIII, 108 - 21015 Lonate Pozzolo (VA) - Italy Tel. +39 0331 661673 - Telefax +39 0331 661638 E-mail: [email protected]

Sider Technology

Rev. 2 - 31/09/09

Page 2: During the Eighties Sider began to be interested in the ...During the Eighties Sider began to be interested in the study of the moulding process with sand/silicate and to the consequent

The sand reclaiming process is subdivided in more steps:

The vibrating shakeout equipment crushes the sand blocks, in order

to turn them to grains or to very small size. Metallic parts, stones or

other foreign matters are kept by a screening surface and are

discharged through a pneumatically opened shutter

Sand coming from the shakeout is conveyed upwards through

suction. During such transport it undergoes, because of the speed, a

crushing and a rubbing of the grains

In the decantation chambers, a first separation and elimination of

dust is carried out

The dusted and treated sand is screened, leaving to pass the

definitively selected one to the successive phase

Through the hot-air fluid bed, the grains are heated and dried, in

order to favour the shattering of the silicate film covering them.

Afterwards the rubbing of the grains pulverizes the silicate film, whi-

le dust is removed and stored in the hopper of the proper sleeves fil-

ter

The sand is cooled uniformly in a heat exchanger with finned tubes

batteries before its definitive ensilage

A pneumatic propulsor, placed under the cooling-unit, conveys sand

to the usage point

In order to improve the quality and to optimize the silicate

consumptions, sand is treated for a last time in a final dust

exhausting group provided with an adjustable cascade system. In

such way also the residual fines together with dust produced during

the pneumatic conveyance are captured, and you obtain a sand with

eccellent granulometry features

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