Recycling Waste Bakelite As A Carbon Resource In Ironmaking
Bakelite is a 3-dimensional cross-linked network structured thermosetting polymer which is difficult to recycle after use. However, it contains high levels of carbon and CaCO3 that can be recovered for use as reductant and fluxing agent in ironmaking. In this work we report the use of postconsumer bakelite as reductant for the production of metallic iron from iron oxide in a horizontal tube furnace through the composite pellet approach.Gas emission studies were conducted by pyrolysing raw bakelite at different temperatures within the temperature range 1200-1600 °C in a horizontal tube furnace. Following this,composite pellets were then formed from mixtures of iron oxide and post-consumer bakelite.The iron oxide-bakelite composites were heated from room temperature to 1200 °C and then between 1200-1600 °C in a continuous stream of pure argon and the off gas was analysed continuously using an infrared (IR) gas analyser. Elemental analyses of samples of the reduced metal were performed chemically for its oxygen content using a LECO oxygen/nitrogen analyser. The extent of reduction after ten minutes was determined from the oxygen content. Gas emission studies revealed the emission of large volumes of the reductant gases CO and CH4along with CO2.It is further demonstrated that post-consumer bakelite is effective at reducing iron oxide to produce metallic iron.
Utilization of Waste Plastic for the Production of Metallic Iron, Hydrogen and Carbon Monoxide without Generating Carbon Dioxide
National legislation within Japan has increased the need for the development of new process technologies that will utilise various waste materials. The present study is aimed at generating some fundamental data with respect to the application of waste plastic as a potential reductant for iron oxide. By using a high frequency induction furnace, mixtures of polyethylene+Fe2O3 were heated very rapidly to temperatures between 1673 and 2073 K in a stream of argon. Gas chromatography, chemical analysis and X-ray diffraction were used to detect reaction products, which consisted of metallic iron, ferrous oxide, char, CO, CO2, H2O, H2 and CH4, depending upon C/O mole ratios within the polyethylene+Fe2O3 mixture and the experimental temperature. The results were in good agreement with values calculated from thermodynamic equilibrium.
The Human Rights Act and Parliamentary Democracy
The Human Rights Act 1998 is the culmination of an aggressive campaign for the incorporation into domestic law of the European Convention on Human Rights, a campaign in which the judges joined forces with other political activists. Variously described as 'brilliant';' 'a masterly exposition of the parliamentary draftsman's art';2 and even 'a thing of intellectual beauty',3 the Act has also been greeted as an 'ingenious compromise' between the 'maximalists' and 'minimalists', the former supporting a judicial power to invalidate legislation, as is the case in Canada.4 But although it is purported to reconcile in 'subtle' form the protection of human rights with the sovereignty of Parliament (a claim even more credible after an important but unsung Commons amendment), the Act also represents an unprecedented transfer of political power from the executive and legislature to the judiciary, and a fundamental re-structuring of our 'political constitution'.s As such it is unquestionably the most significant formal redistribution of political power in this country since 1911,6 and perhaps since 1688 when the Bill of Rights proclaimed loudly that proceedings in Parliament ought not to be questioned or impeached in any court or any other place. In the words of Baroness Williams of Crosby, we have crossed our 'constitutional Rubicon',7 at least to the extent that the courts may now declare a statute incompatible with Convention rights. The enactment of the Human Rights Act 1998 was marked by an unusually high quality of debate, particularly in the House of Lords, with powerful performances by the Lord Chancellor and Lord Lester of Herne Hill. The performance of the latter on one occasion was too much for Lord Campbell of Alloway, unaccustomed it seems to cerebral rather than ceremonial contributions in their Lordships' House. Lord Campbell was heard to protest (in a manner dubbed 'offensive' by Lord Ackner)8 about 'these escoteric lectures on law at this time of night', having 'never heard anything like this after dinner' in the 18 years he had been in the Lords.9 He had better get used to it: the law and the lawyers are about to dominate all the debates, at all times of the day and night, before and after every meal time. Indeed in the Second Reading Debate on this Bill in the House of Lords 'full of