The separation of iron oxide from banded hematite jasper(BHJ) assaying 47.8% Fe, 25.6% Si O2 and 2.30%Al2O3 using selective magnetic coating was studied. Characterization studies of the low grade ore indicate that bes...The separation of iron oxide from banded hematite jasper(BHJ) assaying 47.8% Fe, 25.6% Si O2 and 2.30%Al2O3 using selective magnetic coating was studied. Characterization studies of the low grade ore indicate that besides hematite and goethite,jasper, a microcrystalline form of quartzite, is the major impurity associated with this ore. Beneficiation by conventional magnetic separation technique could yield a magnetic concentrate containing 60.8% Fe with 51% Fe recovery. In order to enhance the recovery of the iron oxide minerals, fine magnetite, colloidal magnetite and oleate colloidal magnetite were used as the coating material. When subjected to magnetic separation, the coated ore produces an iron concentrate containing 60.2% Fe with an enhanced recovery of56%. The AFM studies indicate that the coagulation of hematite particles with the oleate colloidal magnetite facilitates the higher recovery of iron particles from the low grade BHJ iron ore under appropriate conditions.展开更多
This paper underscores the need for new plausible myths that redefine gender relations in an attempt to revalue female assertion, ethical values, and human development. This creative process presents a different persp...This paper underscores the need for new plausible myths that redefine gender relations in an attempt to revalue female assertion, ethical values, and human development. This creative process presents a different perspective from the views of some feminist theorists who have seen myth as a regressive and oppressive structure. The focus, in this paper, is to illustrate how in her chant-novel It Shah Be of Jasper and Coral Liking appropriates the productive force of myths through the misovire consciousness and ritual structure for her gender politics and for promoting ethical values and the culture of human development. In this regard, she decodes existing negative myths and reconstructs new gender myths that redefine gender relations, celebrate what she calls women＇s ＂cosmic force＂ and through ritual cleansing, reinvents a new language of beauty and a new race of Jasper and Coral. Thus, guided by the tenets of deconstruetion and the gender relations frameworks, this paper defends the thesis that Liking＇s chant-novel through myth invention and revision combines and fuses traditional and modem aesthetics, thematic and structural elements that she uses to deconstruct social and gender relations. The contention is that in negotiating plausible gender relations for men and women in Africa, Liking＇s story and structure incorporate the cleansing, cathartic effect of Bassa ritual performance into the narrative.展开更多
文摘The separation of iron oxide from banded hematite jasper(BHJ) assaying 47.8% Fe, 25.6% Si O2 and 2.30%Al2O3 using selective magnetic coating was studied. Characterization studies of the low grade ore indicate that besides hematite and goethite,jasper, a microcrystalline form of quartzite, is the major impurity associated with this ore. Beneficiation by conventional magnetic separation technique could yield a magnetic concentrate containing 60.8% Fe with 51% Fe recovery. In order to enhance the recovery of the iron oxide minerals, fine magnetite, colloidal magnetite and oleate colloidal magnetite were used as the coating material. When subjected to magnetic separation, the coated ore produces an iron concentrate containing 60.2% Fe with an enhanced recovery of56%. The AFM studies indicate that the coagulation of hematite particles with the oleate colloidal magnetite facilitates the higher recovery of iron particles from the low grade BHJ iron ore under appropriate conditions.
文摘This paper underscores the need for new plausible myths that redefine gender relations in an attempt to revalue female assertion, ethical values, and human development. This creative process presents a different perspective from the views of some feminist theorists who have seen myth as a regressive and oppressive structure. The focus, in this paper, is to illustrate how in her chant-novel It Shah Be of Jasper and Coral Liking appropriates the productive force of myths through the misovire consciousness and ritual structure for her gender politics and for promoting ethical values and the culture of human development. In this regard, she decodes existing negative myths and reconstructs new gender myths that redefine gender relations, celebrate what she calls women＇s ＂cosmic force＂ and through ritual cleansing, reinvents a new language of beauty and a new race of Jasper and Coral. Thus, guided by the tenets of deconstruetion and the gender relations frameworks, this paper defends the thesis that Liking＇s chant-novel through myth invention and revision combines and fuses traditional and modem aesthetics, thematic and structural elements that she uses to deconstruct social and gender relations. The contention is that in negotiating plausible gender relations for men and women in Africa, Liking＇s story and structure incorporate the cleansing, cathartic effect of Bassa ritual performance into the narrative.
