Scrap tyre recycling process with molten zinc as direct heat transfer and solids separation fluid: A new reactor concept

摘要

class="kwd-title">Method name: Tyre pyrolysis by direct heat contact with molten zinc and in-situ sink-float separation of recovered carbon black (rCB) and steel class="kwd-title">Keywords: Tyre pyrolysis, Molten metal, Direct heat transfer, Sink-float separation class="head no_bottom_margin" id="abs0010title">AbstractEvery year about 1.5 billion tyres are discarded worldwide representing a large amount of solid waste, but also a largely untapped source of raw materials. The objective of the method was to prove the concept of a novel scrap tyre recycling process which uses molten zinc as the direct heat transfer fluid and, simultaneously, uses this media to separate the solids products (i.e. steel and rCB) in a sink-float separation at an operating temperature of 450–470 °C.This methodology involved: class="first-line-outdent">

• construction of the laboratory scale batch reactor,

• separation of floating rCB from the zinc,

• recovery of the steel from the bottom of the reactor following pyrolysis