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Çinko ve bakır cevherlerinin besleme malı, konsantre ve atıkları çok boyutlu ölçekleme analizi ile incelenmiştir. X-R analizine göre bakır (besleme malı, konsantre ve artık) için hesaplanan 〖LCL_X,UCL〗_X and UCL_R değerleri sırasıyla 1.94, 16.92, 0.16; 2.96, 22.90, 0.41 ve 0.89, 5.19, 0.21’dir. Benzer şekilde, çinko için bu değerler sırasıyla 0.31, 43.46, 0.23; 3.00, 50.33, 0.66 ve 2.34, 5.97, 0.37’dir. Hesaplanan Cp bakır ve çinko değerleri sırasıyla 2,08, 1,42, 1,39 ve 1,82, 1,54 ve 1,25'tir. Bakır ve çinkonun besleme malı, konsantre ve atık parametreleri 1,0'den büyüktür. Benzer şekilde, bu çalışma bakır ve çinko için hesaplanan Cpk değerlerinin (2,15, 1,20 ve 1,72 ; 3,82, 1,05 ve 1,53) 1,0'den büyük olduğunu göstermektedir. Stress değerleri, analizin ilk aşamasında hesaplanmış ve bakır ve çinko için sırasıyla 0,00258 ve 0,00674'te belirlenmiştir. Bununla birlikte RSQ, sırasıyla bakır ve çinko için 0,9998 ve 0,9986 olarak hesaplanmıştır. Bu değerler faktörler arasında yüksek bir korelasyon olduğunu göstermiştir. Son olarak, bu çalışma Çayeli Bakır İşletmelerinde karar vericilere yardımcı olmak için ortalama ve aralık kontrol çizelgeleri, süreç doğruluk indeksleri ve çok boyutlu ölçekleme analizi gibi istatistiksel işlem kontrol tekniklerinin kullanışlılığını göstermiştir., The feeding materials, concentrates and tailings of zinc and copper ores were examined by multidimensional scaling analysis. The calculated 〖LCL_X,UCL〗_X and UCL_R values for copper (feeding material, concentrate, and tailing) according to X-R analysis are 1.94, 16.92, 0.16; 2.96, 22.90, 0.41 and 0.89, 5.19, 0.21 respectively. Likewise, these values for zinc are 0.31, 43.46, 0.23; 3.00, 50.33, 0.66 and 2.34, 5.97, 0.37 respectively. The calculated Cp copper and zinc values are 2.08, 1.42, 1.39 and 1.82, 1.54, 1.25 respectively. The feeding material, concentrate, and tailing parameters of the copper and zinc products are greater than 1.0. Likewise, this study shows that the calculated Cpk values for copper and zinc (2.15, 1.20, 1.72 and 3.82, 1.05, 1.53 respectively) are larger than 1. Stress value was calculated at the first step of the analysis and established at 0.00258 and 0.00674 for copper and zinc, respectively, which indicates a fair fit for both. Nevertheless, the coefficient of determination (RSQ) was calculated as 0.9998 and 0.9986 for copper and zinc, respectively. These values indicated a high correlation between factors. Finally, this study showed that the usefulness of statistical process control techniques, such as mean and range control charts, process capability indexes and multidimensional scaling analysis, in helping decision makers in Çayeli Copper Companies.

Hess, J.B., Bilgili, S.F., Parson, A.M. and Downs, K.M. 2001. Influence of complexed zinc products on live performance and carcass grade of broilers. J. Appl. Anim. Res., 19: 49–60. The influence of supplementing diets with zinc (Zn) amino acid complexes on live performance and carcass quality of female (Experiment 1) and male broiler chickens (Experiment 2) was investigated. In Experiment 1, day-old female chicks were fed, under summer conditions, one of 4 dietary treatments: a control and diets supplemented with Zn (40 ppm) from Zn-methionine, Zn-lysine, or a commercial mixture of Zn-methionine and Zn-lysine. During the rearing period, body weight and feed conversion were measured. Randomly selected birds were processed with subsequent evaluation of foot pad lesions and carcass grades. In Experiment 2, male chicks were fed similar diets as Experiment 1, but under cool weather conditions. Live performance variables were measured and randomly selected- birds were processed to assess carcass defec...

In the catalytic liquefaction of coal using zinc chloride, the recovery of the various spent zinc products is a prime requirement if the process is to be economically feasible. After hydrogenation, depending on the extent of coal conversion to liquid and gaseous products, about one third of the applied zinc is found with the liquids and two thirds remain with the char. The zinc associated with the liquid product is readily recovered with a water wash. The zinc associated with the char can be recovered by means of water and hydrochloric acid leaches to the extent of 70% of that present. The remaining char associated zinc (15–20% of that originally applied to the coal) is incorporated within the organic matrix of the char. A room temperature concentrated nitric acid leach is required to liberate the remaining zinc from the char. Ultimate recoveries of 98.5–99.7% are possible with the combined water, hydrochloric acid and nitric acid leach sequence.

Production of 69mZn in the Oak Ridge Research Reactor by two nuclear reactions was studied using natural abundance Ga2O3 and isotopically enriched Ga2O3 and ZnO. The fission-neutron cross section for the 69Ga(n,p)69mZn reaction was determined to be 0·496 ± 0.073 mb, and separation of the zinc products from gallium target was achieved by solvent extraction. Production of 69PmZn reaction produced an average isotopic abundance of 2·22 mCi of 69mZn per mg of zinc target.

This paper reports the possibility of using zinc ash as a secondary source for zinc oxide, which can be further used as white pigment. For the extraction of zinc from zinc ash, sulphuric acid was used. The impact of different parameters (ash fraction, contact time, sulphuric acid concentration and liquid:solid (L:S) ratio) upon the extraction degree of metallic ions from zinc ash was studied. The optimum conditions for the metallic ions extraction are: 20 % H2SO4, 30 minutes contact time, 1:1 L:S ratio and the fraction of the ash