Pilbara blending iron ore powder （PB powder） is blending ores with good and poor quality iron ores, so how to use PB power effectively is a problem. The self-characteristics of PB powder and its single-components we...Pilbara blending iron ore powder （PB powder） is blending ores with good and poor quality iron ores, so how to use PB power effectively is a problem. The self-characteristics of PB powder and its single-components were studied respectively such as the macroscopic properties, microscopic properties, and high-temperature properties the behavior and effect in the sintering were mastered. Then based on the new ore-proportioning idea of iron ores sintering characteristics complementary, the principles on the effective use of PB powder were discussed, and was fur ther validated through the sintering pot test and industrial production. The results show that PB powder is composed of three kinds of iron ore, and the sintering characteristics of different iron ores are obviously discrepant. With the ore-proportioning optimization based on the iron ores sintering characteristics complementary, the proportion of PB iron ore powder can be increased to more than 45 %.展开更多
Mixtures of multiple grains at varied ratios can provide multiple and higher micronutrients than a single grain. Thus, this research was aimed at examining the effect of blending ratios variation on micro-compositions...Mixtures of multiple grains at varied ratios can provide multiple and higher micronutrients than a single grain. Thus, this research was aimed at examining the effect of blending ratios variation on micro-compositions and phytate/ minerals molar ratios of pre-processed local dabi teff-field pea based novel composite complementary flours. Induc-tively Coupled Plasma-Optical Emission Spectrometry was used to determine dietary minerals. Nutrisurvey software was employed to define ranges of the mixture components and they were constrained at 20-35% for dabi teff, 0-30% field pea and 5-20% maize, while the remaining were set constant at 25% barley, 15% oats and 5% linseed. Design-Expert^(®) software version 11, D-optimal was used to generate eleven experimental blends and to examine the effects of blending ratio variation on the responses. Mean mineral contents were significantly different (P < 0.05) among the blends (as affected by component ratios variation) and ranged from 24.01-31.58 mg/100 g for iron, 73.46 -78.81 mg/100 g for calcium, and 2.33-2.61 mg/100 g for zinc contents. The phytate/minerals molar ratios were significantly different among the blends except phytate/calcium molar ratio (Ph:Ca), ranged from 0.232-0.344 for phytate/iron molar ratio (Ph:Fe), 0.067-0.085 for (Ph:Ca), 3.356-4.18 for phytate/zinc molar ratio (Ph:Zn) and 6.457- 7.943 for phytate by calcium to zinc molar ratio (Ph*Ca:Zn). A linear model was significant (P < 0.05) and adequate to describe variations in iron, zinc, Ph:Fe, Ph:Zn and Ph*Ca:Zn. There was a remarkably linear increase in iron and calcium contents with an increased dabi teff ratio in the blends accompanied by a significant decrease (P < 0.05) in phytate/minerals molar ratios. The findings showed that increasing dabi teff ratio in the blends notably increased iron content with reduced Ph:Fe molar ratio, providing the bases for developing iron-dense novel composite complementary flour with improved iron bioavailability to combat iron deficiency anemia among children.展开更多
文摘Pilbara blending iron ore powder （PB powder） is blending ores with good and poor quality iron ores, so how to use PB power effectively is a problem. The self-characteristics of PB powder and its single-components were studied respectively such as the macroscopic properties, microscopic properties, and high-temperature properties the behavior and effect in the sintering were mastered. Then based on the new ore-proportioning idea of iron ores sintering characteristics complementary, the principles on the effective use of PB powder were discussed, and was fur ther validated through the sintering pot test and industrial production. The results show that PB powder is composed of three kinds of iron ore, and the sintering characteristics of different iron ores are obviously discrepant. With the ore-proportioning optimization based on the iron ores sintering characteristics complementary, the proportion of PB iron ore powder can be increased to more than 45 %.
文摘Mixtures of multiple grains at varied ratios can provide multiple and higher micronutrients than a single grain. Thus, this research was aimed at examining the effect of blending ratios variation on micro-compositions and phytate/ minerals molar ratios of pre-processed local dabi teff-field pea based novel composite complementary flours. Induc-tively Coupled Plasma-Optical Emission Spectrometry was used to determine dietary minerals. Nutrisurvey software was employed to define ranges of the mixture components and they were constrained at 20-35% for dabi teff, 0-30% field pea and 5-20% maize, while the remaining were set constant at 25% barley, 15% oats and 5% linseed. Design-Expert^(®) software version 11, D-optimal was used to generate eleven experimental blends and to examine the effects of blending ratio variation on the responses. Mean mineral contents were significantly different (P < 0.05) among the blends (as affected by component ratios variation) and ranged from 24.01-31.58 mg/100 g for iron, 73.46 -78.81 mg/100 g for calcium, and 2.33-2.61 mg/100 g for zinc contents. The phytate/minerals molar ratios were significantly different among the blends except phytate/calcium molar ratio (Ph:Ca), ranged from 0.232-0.344 for phytate/iron molar ratio (Ph:Fe), 0.067-0.085 for (Ph:Ca), 3.356-4.18 for phytate/zinc molar ratio (Ph:Zn) and 6.457- 7.943 for phytate by calcium to zinc molar ratio (Ph*Ca:Zn). A linear model was significant (P < 0.05) and adequate to describe variations in iron, zinc, Ph:Fe, Ph:Zn and Ph*Ca:Zn. There was a remarkably linear increase in iron and calcium contents with an increased dabi teff ratio in the blends accompanied by a significant decrease (P < 0.05) in phytate/minerals molar ratios. The findings showed that increasing dabi teff ratio in the blends notably increased iron content with reduced Ph:Fe molar ratio, providing the bases for developing iron-dense novel composite complementary flour with improved iron bioavailability to combat iron deficiency anemia among children.
