The recent annual output of major industrial mineral powders in the mainland of China has been more than 100 million t, accompanied by active development of such supporting technology as comminution, classification, s...The recent annual output of major industrial mineral powders in the mainland of China has been more than 100 million t, accompanied by active development of such supporting technology as comminution, classification, separation/purification, and surface modification. In particular, the present paper reviews technologies for preparing ultra-fine particles involving dry and wet processing, modification and composition, calcination of kaolin clay, and processing of spherical/acerous industrial minerals.展开更多
More than 40 kinds of selected minerals and compounds were individually irradiated by microwaves under an inert atmosphere,and the temperatures of samples were measured with a metal-sheathed thermocouple inserted into...More than 40 kinds of selected minerals and compounds were individually irradiated by microwaves under an inert atmosphere,and the temperatures of samples were measured with a metal-sheathed thermocouple inserted into the samples directiy.The results indicated that most sulphide and some oxide minerals and compounds could be heated to high temperatures in a short timet whereas the common gangue minerals,some oxide and oxy-salt minerals or compounds could not.The sulphide minerals had faster heating rate than the oxide minerals containing the same cations.The impurities of minerals had significant effect on the heating rate.The selective heating characteristics of microwaves on different minerals and compounds could be attributed to the differences between their conductivities or dielectric loss factors and bonding properties.展开更多
In this work,the design and construction of a continuous and pilot-scale flotation facility are demonstrated.The performance of the new facility was evaluated from series of pilot flotation tests,carried out using oil...In this work,the design and construction of a continuous and pilot-scale flotation facility are demonstrated.The performance of the new facility was evaluated from series of pilot flotation tests,carried out using oil sands slurry to extract bitumendan extra-heavy form of petroleum.Results indicated that bitumen recoveries of the new pilot plant for an identical ore and water chemistry were largely dependent on air injection method,slurry conditioning time,flotation residence time,and slurry temperature.Importantly,when compared with those of bitumen extraction tests using a bench-scale Batch Extraction Unit(BEU)operated at the most optimal conditions,it was suggested that the new pilot plant produced flotation recoveries of bitumen and froth qualities at a level as good as,or even higher than,the level accomplished using the BEU at an identical ore,water chemistry and operating temperature.This continuous,pilot flotation plant could potentially serve as a pre-commercial production system that verifies a new processing aid,or as an alternative extraction technology for oil sand,coal,and mineral processing.展开更多
<span style="font-family:Verdana;">Impact of traditional treatments on the nutritional value of </span><span><i></i></span><i><span style="font-family:Verdan...<span style="font-family:Verdana;">Impact of traditional treatments on the nutritional value of </span><span><i></i></span><i><span style="font-family:Verdana;">Artocarpus heterophyllus</span><span></span></i><span> </span><span style="font-family:Verdana;">seeds w</span><span style="font-family:Verdana;">as</span><span style="font-family:Verdana;"> evaluated. Four traditional processing methods were used (boiling, roasting, soaking and fermentation</span><span style="font-family:Verdana;">)</span><span style="font-family:Verdana;">. Boiled </span><span><i></i></span><i><span style="font-family:Verdana;">A. heterophyllus</span><span></span></i><span> </span><span style="font-family:Verdana;">(BAH) samples were boiled in water for 60 minutes, roasted </span><span><i></i></span><i><span style="font-family:Verdana;">A. heterophyllus</span><span></span></i><span> </span><span style="font-family:Verdana;">(RAH) samples were roasted in fine sand, soaked </span><span><i></i></span><i><span style="font-family:Verdana;">A. heterophyllus</span><span></span></i><span> </span><span style="font-family:Verdana;">(SAH) were soaked in clean water for 48 hours before boiling while the fermented</span><span style="font-family:Verdana;"> A. heterophyllus </span><span style="font-family:Verdana;">(FAH) samples were boiled and wrapped in black bag for 48 hours. The mean proximate content (%) of the unprocessed </span><span><i></i></span><i><span style="font-family:Verdana;">A. heterophyllus</span><span></span></i><span> </span><span style="font-family:Verdana;">(UAH) seeds w</span><span style="font-family:Verdana;">as</span><span style="font-family:Verdana;">;protein (15.88 ± 0.08), fibre (10.04 ± 0.09) ash (5.05 ± 0.07), moisture (29.25 ± 0.35), fat (10.26 ± 0.35) and carbohydrate (29.52 ± 0.4). Processing affected the proximate and mineral composition of </span><span><i></i></span><i><span style="font-family:Verdana;">A. heterophyllus</span><span></span></i><span style="font-family:Verdana;"> seeds. All the processing methods展开更多
文摘The recent annual output of major industrial mineral powders in the mainland of China has been more than 100 million t, accompanied by active development of such supporting technology as comminution, classification, separation/purification, and surface modification. In particular, the present paper reviews technologies for preparing ultra-fine particles involving dry and wet processing, modification and composition, calcination of kaolin clay, and processing of spherical/acerous industrial minerals.
基金Supported by the National Natural Science Foundation and National Nonferrous Metals Industry Corporation of China。
文摘More than 40 kinds of selected minerals and compounds were individually irradiated by microwaves under an inert atmosphere,and the temperatures of samples were measured with a metal-sheathed thermocouple inserted into the samples directiy.The results indicated that most sulphide and some oxide minerals and compounds could be heated to high temperatures in a short timet whereas the common gangue minerals,some oxide and oxy-salt minerals or compounds could not.The sulphide minerals had faster heating rate than the oxide minerals containing the same cations.The impurities of minerals had significant effect on the heating rate.The selective heating characteristics of microwaves on different minerals and compounds could be attributed to the differences between their conductivities or dielectric loss factors and bonding properties.
文摘In this work,the design and construction of a continuous and pilot-scale flotation facility are demonstrated.The performance of the new facility was evaluated from series of pilot flotation tests,carried out using oil sands slurry to extract bitumendan extra-heavy form of petroleum.Results indicated that bitumen recoveries of the new pilot plant for an identical ore and water chemistry were largely dependent on air injection method,slurry conditioning time,flotation residence time,and slurry temperature.Importantly,when compared with those of bitumen extraction tests using a bench-scale Batch Extraction Unit(BEU)operated at the most optimal conditions,it was suggested that the new pilot plant produced flotation recoveries of bitumen and froth qualities at a level as good as,or even higher than,the level accomplished using the BEU at an identical ore,water chemistry and operating temperature.This continuous,pilot flotation plant could potentially serve as a pre-commercial production system that verifies a new processing aid,or as an alternative extraction technology for oil sand,coal,and mineral processing.
文摘<span style="font-family:Verdana;">Impact of traditional treatments on the nutritional value of </span><span><i></i></span><i><span style="font-family:Verdana;">Artocarpus heterophyllus</span><span></span></i><span> </span><span style="font-family:Verdana;">seeds w</span><span style="font-family:Verdana;">as</span><span style="font-family:Verdana;"> evaluated. Four traditional processing methods were used (boiling, roasting, soaking and fermentation</span><span style="font-family:Verdana;">)</span><span style="font-family:Verdana;">. Boiled </span><span><i></i></span><i><span style="font-family:Verdana;">A. heterophyllus</span><span></span></i><span> </span><span style="font-family:Verdana;">(BAH) samples were boiled in water for 60 minutes, roasted </span><span><i></i></span><i><span style="font-family:Verdana;">A. heterophyllus</span><span></span></i><span> </span><span style="font-family:Verdana;">(RAH) samples were roasted in fine sand, soaked </span><span><i></i></span><i><span style="font-family:Verdana;">A. heterophyllus</span><span></span></i><span> </span><span style="font-family:Verdana;">(SAH) were soaked in clean water for 48 hours before boiling while the fermented</span><span style="font-family:Verdana;"> A. heterophyllus </span><span style="font-family:Verdana;">(FAH) samples were boiled and wrapped in black bag for 48 hours. The mean proximate content (%) of the unprocessed </span><span><i></i></span><i><span style="font-family:Verdana;">A. heterophyllus</span><span></span></i><span> </span><span style="font-family:Verdana;">(UAH) seeds w</span><span style="font-family:Verdana;">as</span><span style="font-family:Verdana;">;protein (15.88 ± 0.08), fibre (10.04 ± 0.09) ash (5.05 ± 0.07), moisture (29.25 ± 0.35), fat (10.26 ± 0.35) and carbohydrate (29.52 ± 0.4). Processing affected the proximate and mineral composition of </span><span><i></i></span><i><span style="font-family:Verdana;">A. heterophyllus</span><span></span></i><span style="font-family:Verdana;"> seeds. All the processing methods
