Some main results of testing research were as fellows : i. in the course of testing of leaching zinc dross, leaching zinc dross by sulfuric acid was researched and the effects on the leaching rate of the zinc dross were analyzed by author, the optimum conditions of leaching testing of zinc dross were determined as fellows : liquid - solid ratio 6 : 1, stirring ratio 250r / min, granularity 120 mesh, the soaking time 5h, the concentration of sulfuric acid of 30 %, and under these conditions, the rate of leaching zinc is above 92. 0 %. ii. in the course of testing of purification, on the basis of comprehending and comparing all present methods of the manganese - removal and iron - removal, the oxidizing method of manganese - removal in zinc sulfate solution using ammonium persulfate was put forward and the oxidizing method of iron - removal in zinc sulfate solution using the goethite process and oxidation - hydrolysis process was adopted
研究
的主要結果具體如下: 1 、研究了硫酸浸出鋅浮渣並分析了影響浸出率
的各種因素,確定了浸出鋅浮渣
的最佳條件為:液固比為6 : 1 ,攪拌速度為250r min ,粒度為- 120目,酸浸時間為5 . 0h ,硫酸濃度30 ,鋅浮渣
的浸出率大於92 . 0 ; 2 、在綜合和比較了目前除
錳和除鐵
的各種方法基礎上,提出了過硫酸銨氧化除
錳方法和選擇了針鐵礦-氧化水解聯合法除鐵方法,並分析和討論了影響除
錳率和除鐵率等各種因素,確定了除
錳的條件為:溫度90 , ph值5 . 4 ,反應時間3h ,過硫酸銨達到理論值
的1 . 2倍,除
錳率超過99 . 86 ;聯合法除鐵
的條件為:氧化反應時間1 . 5小時、溫度控制在90 92 、 ph值5 . 2 5
The contents of organic material, limonite and manganese hydroxides influence the variation of ore element.
有機物、褐鐵礦和氧化
錳的含量影響著成礦元素含量
的變異。
Oxidation-reduction reactions are important in the solubilization and precipitation of iron and manganese.
氧化還原反應在鐵和
錳的增溶和沉澱中具有重要作用。
Determination of easy reducible manganese in forest soil
森林土壤易還原
錳的測定
The actuality and prospect of studies on soil manganese
土壤
錳的研究現狀及展望
The amounts of cu, zn, fe and mn in day - lily flower, osmunda cinnamomea and walnut kernel were determined by microwave digestion - flame atomic absorption spectrometry
摘要採用微波消解樣品,用火焰原子吸收光譜法測定了黃花菜、薇菜和核桃仁中
的銅、鋅、鐵、
錳的含量。
Water quality - determination of manganese - potassium periodate spectrophotometric method
水質
錳的測定高碘酸鉀分光光度法
A study on the preparation of manganese sulfate by co - calcining pyrolusite and pyrite
軟
錳礦與黃鐵礦共同焙燒制備硫酸
錳的研究
The effort of manganese removal was studied and the kinetics of manganese removal was tried to establish. the factors of dissolved oxygen concentration, fe2 + concentration, ph, p concentration and closing of the filter were studied to evaluate their effort for biological manganese removal, and the correlation of residual manganese and oxidation - reduction potential was also discussed. as the iron content of water was high, experiment results showed that the reaction was zero order, as the iron content of water was low, the reaction was first order. the time needed for the cultivation of biological manganese removal was 60 70 days. the filter operated at the filtration rate of 8 10m / h, silica sand of effective size 0. 95 1. 25mm filled the filter to a depth of 1200mm
試驗結果表明,成熟后濾砂表面濾膜
的x射線衍射圖譜與mno _ x ? 5h _ 2o ( x = 1 . 86 )
的x射線衍射圖譜一樣,濾膜成熟后
的結構在進水物質不發生變化
的情況下不發生變化;合適
的碳磷比對生物除
錳有明顯
的促進作用,試驗條件下
的投磷量不會對出水造成二次污染;生物除
錳需要亞鐵
的參與,亞鐵
的存在除了能夠促進微生物分泌胞外酶並刺激其活性外,還通過鐵離子
的變價傳遞電子,催化
錳離子
的氧化反應,從而促進對二價
錳的降解。
In order to improve its cycle performance and reduce capacity loss, we have synthesized series of lithium nickel manganese vanadate by using the moist chemical method in the reaction conditions of different temperature and calcination time. the structure characterization and element analysis tests are preformed by means of xrd, ir, raman and xps
為了改善其循環性能以及減少充放電過程中
的容量損失,我們對其中
的ni2 +進行部分替代,採用濕化學方法合成出了
錳對鎳不同取代量
的產物linil _ 、 mn萬04 ,並結合xrd 、 xps 、 ir和r田刀an圖譜對其固溶度及摻入其中
的錳的價態進行研究。
Sampling and analysis of iron, steel and other ferrous metals - methods of analysis - determination of manganese - ferromanganese and ferrosilicomanganese : potentiometric method
鐵鋼和其他鐵合金
的抽樣和分析.分析方法.
錳的測定.鐵
錳合金和硅
錳鐵合金:電位滴定法
The potential of mn ( iii ) / mn ( ii ) redox couple in h2so4 is 1. 51v vs. nhe, which may be suitable for the positive half - cell in a redox flow storage system. but studies on this couple as a positive electrode in this system have not been reported so far
錳的各種氧化物是化學電源里常選用
的活性物質,而將溶液狀態
的mn ( iii ) / mn ( ii )電對作為化學儲能裝置
的活性材料
的工作尚未見報道。
Method for chemical analysis of silicomanganese
硅錳的化學分析方法