| 摘要 |
New process for producing a filler from coal comprises the following steps. (a) Carrying out a dry distn. and decomposition at 500-200 deg.C of crushed coal having a particle dia. of 10 mm or less and an ash- content of 10% or less, followed by cooling the prod. (b) Adding to the slurry resulting from (a) a dispersion medium, thus preparing a slurry having a solid concn. of 10-50 wt.% and then crushing the slurry into super-fine particles having a dia. of 5 micro m or less. (c) Adding water to the super-fine slurry resulting from (b) to adjust its concn. to 1-20 wt.% and then adding to it 30-300 pts.by wt. of an oil, the b.pt. of which is 150 deg.C or less, per 100 pts. by wt. of dry solids in the slurry, and then stirring to granulate the carbonaceous substances. After granulation, the formed granules are sepd. and recovered. (d) Heating and drying the granules at 50-300 deg.C to evaporate water and oil, and cooling the dried granules. At step (b) before the dispersion medium is added, the dried slurry resulting from (a) is pref. precrushed to 200 mesh or less. At (b) instead of a dispersion medium, water and a dispersion medium and/or antifoaming agent can be added. At (b) after the concn. of slurry is adjusted, the iron component contained in the slurry can be removed with a magnet and/or coarse particles can be removed using a wet size-selecting machine. At (c) the added oil can contain a rubber component and/or a 12-24C fatty acid and a surface improving agent, e.g. a process-oil for rubbers, an activating reagent or a vulcanising agent. |
