Fundamental research on charcolizaion and burning of multiple wooden wastes

拆卸建筑物和混凝土形式工程产生的废物由不同的组成部分组成。从燃烧这些混合废物的过程中可以得到木炭。本研究旨在为混合废弃物赋予新的功能特性，并对两步超高温炭化木炭进行研究。虽然炭化过程取决于大气条件和温度，但木材的解剖结构在高温下仍能保持良好。炭化温度对结晶结构和甲醛吸附性能的影响较大。在氩气气氛下，将杉木炭在2500℃以上加热形成锥形碳材料。这种新发现的材料由于形成方式的不同，与已知的木质炭具有非常不同的特征和热稳定性。2500℃处理后的炭（包括锥形炭材料）在空气条件下的放热峰比已知的木质炭放热峰宽。这一事实说明氧化温度的范围很广。通过控制氧化温度和氧化时间，可以从炭化木材细胞壁中分离出锥形碳材料。通过不同温度的处理，制备了不同水合物的废石膏板。将石膏板粉与木炭粉按不同比例混合制成板材，并对其吸收率和力学性能进行了研究。粉状石膏板经500℃处理后为硬石膏。水分条件和干燥温度对水化状态没有影响。混合物料的含水率随木炭配比的增加而增加。在混合废物的情况下，监测燃烧和表征过程至少对应用是必要的。由于在炭化过程中会产生各种挥发性气体，因此两步炭化法对新材料的改性是有用的。少

Wastes from demolished buildings and concrete-form work consist of various components. Charcoal of wood material is available from the process of burning of these mixed wastes. This study aimed to attach new functional property to the mixed wastes and investigate the wood charcoal carbonized by ultrahigh-temperature processing by two-step carbonization.Though the carbonization depends on the condition of atmosphere and temperatures, anatomical structure of wood is considerably maintained even at high temperature. Change of the crystal structure and adsorption property of formaldehyde are dependent on the carbonization temperature.Conical carbon material was formed by heating Japanese cedar charcoal at more than 2500℃ under Ar gas atmosphere. This newly found material has very different feature and thermal stability from known wood charcoals because of difference of the formation. The exothermal peak of 2500℃ treated charcoal, which includes conical carbon material, with DTA measurement … More under air is broader than those of known wood charcoals. This fact indicates that the region for oxidizing temperature is wide. Isolation of the conical carbon material from charred wood cell wall might be achieved by controlling oxidization temperature and time.Waste gypsum board of various hydrates was prepared by treating at various temperatures. The powdered gypsum board and wood charcoal was mixed with various ratios and reformed as boards and absorption and mechanical property were investigated. Powdered gypsum board treated at 500℃ was anhydrite. The hydration state was not changed by moisture condition and drying temperature. The moisture content of the mixed material increased with the increase of the ratio of wood charcoal. In the case of mixed wastes monitoring the process of combustion and charcoalization is at least necessary for application. For the modification into new materials two-step carbonization is useful because various volatile gases are generated during charcoalization process. Less