| 摘要 |
<p>A method of manufacturing a granular building material from refuse. Cylindrical granules, having a diameter of 8 mm and a length from 10 to 20 mm, are formed by granulation under a pressure of 600 bar of a homogeneous first powder mixture of 952 kg of crushed household refuse, 50 kg of quicklime and 5 kg of calcium carbonate. The granules are heated at 200 DEG C. for 30 minutes in a rotary tubular kiln so as to obtain 720 kg of granules having a moisture content of about 1% by weight. These granules are finely crushed and, in a malaxator, a second powder mixture is prepared which is composed of a mixture of 101 kg of Portland cement, 101 kg of powdered dolomite, 91 kg of calcium carbonate and 50.5 kg of water, and the fine powder resulting from the crushing of the granules. Finally, the second mixture is granulated under a pressure of 600 bar and the granules are left to harden with the setting of the cement. The final granular building material may be employed as granulate for making concrete.</p> |
