毒重石

镇巴&城口震旦系毒重石成矿带地质特征

The geologic feature of Sinian witherite mineralized belt in Zhenba Chengkou

毒重石矿床属热水沉积成因层控矿床。

Witherite deposits belong to stratabound deposits of hot water sedimentation .

从焙烧毒重石生产氢氧化钡的矿渣中回收钡

Recovery of barium from slag of producing barium hydroxide by calcined

酸洗废液浸取毒重石制氯化钡工艺研究

Study on preparation of barium chloride from witherite and spent pickling solution

硝酸分解毒重石宏观动力学研究

Macro-kinetics study on decomposition of witherite with nitric acid

毒重石在700~1000℃下的热分解动力学模型研究

Kinetic model study on the decomposition of witherite at 700 ~ 1000 ℃

毒重石又称天然碳酸钡。

The natural barium carbonate is called witherite commonly .

毒重石钡矿高温分解特性

Decomposition Properties of Witherite Mineral in High Temperature

用毒重石制备氯化钡工艺研究

Study of preparating barium chloride by witherite

模型结果表明：毒重石钡矿分解反应可用缩核模型描述，反应过程存在控制区的转移；

It is indicated that the mode is capable of describing the decomposition reaction of witherite .

毒重石钡矿分解过程的数学模型研究

Mathematical Model of Witherite Decomposing Process

研究了在间歇反应器中，用硝酸分解毒重石宏观动力学特性。

The macro-kinetics characteristics of decomposition of witherite with nitric acid in a batch reactor are studied .

GB/T13692-1992重晶石、毒重石矿地质勘探规范污泥改良锰矿尾渣对4种花卉植物生长及其富集重金属的影响

Influence of Mn Mine Tailings Amended with Sewage Sludge on Plant Growth of Four Ornamental Species and Accumulation of Heavy Metals

结合区域构造&沉积演化认为，毒重石矿床沉积-成矿作用受区域同生断裂演化控制。

According to the regional tectonic-sedimentary evolution , the formation of witherite deposits was controlled by the evolution of regional growth faults .

矿石类型主要有毒重石型和重晶石&毒重石型两类，前一类质量较优。

There are mainly two types of ores & witherite and barite-witherite . The former is better than the later in ore quality .

秦巴山区钡资源丰富，钡矿床（重晶石、毒重石）分3带：南带为毒重石矿带，北带与中带为重晶石矿带。

There are3 barium deposit zones distributed in Qinba mountain area , they are witherite deposit zone in the south , barite deposit zones in the north and middle .

以毒重石、自产盐酸为原料，一步法合成了液体氯化钡，省去了蒸发、结晶、离心、干燥等工序。

Liquid barium chloride was produced by one-step process from witherite and self-produced hydrochloric acid with no needs of some procedures , such as evaporation , crystallization , centrifuge and drying .

结果表明：硝酸分解毒重石的反应过程是典型的氢离子通过液膜的传质控制的反应过程。

The test results show that the reaction process of decomposition of witherite with nitric acid is the typical mass-transfer control process , in which the hydrogen ion diffuses through liquid film .

根据毒重石钡矿的结构特点和热解特性，基于单界面缩核模型建立了毒重石钡矿分解过程的缩核模型，并利用所建模型进行数值解析，计算结果与实验结果基本吻合。

According to the structural characteristics and pyrolytic properties of witherite , an core shrinking mathematical model is developed for witherite decomposition based on single interface core shrinking model . By numerical calculation , it is found that the calculated data accord with the experimental results .