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stone coal 白煤,塊狀無煙煤。

stone composition

This paper introduced the improves of roasting - sodium processing and such pollution - free processing as acid leaching - extration , roasting in air - acid leaching - extration , liming roasting - alkali leaching on extraction of v2o5 from stone coal , the total recovery rate obtains enhances , the industrial application prospect is good 摘要介紹了石煤提釩傳統工藝的改進以及酸法萃取、無鹽焙燒酸浸萃取、氧化焙燒堿浸等幾種從石煤無污染提取五氧化二釩的工藝流程,上述工藝不但生產過程無環境污染,釩的回收率還大有提高,是很有前途的清潔生產工藝。

Contrasting stone coal to the soil developed from it and water to water leached from stone coal shows that slight fluorine pollution of surface water and plant resulted from weathering of stone coal and leaching 摘要通過對比典型剖面上的石煤及其風化發育的土壤的氟含量、流經石煤層的水與不經過石煤層的水的氟含量,研究石煤風化、淋溶時氟對土壤、地表水和農作物的影響。

The state shall encourage coal mining enterprises to develop coal washing and processing as well as comprehensive exploitation and utilization of coalbed methane , gangue , coal slime , stone coal and peat 國家鼓勵煤礦企業發展煤炭洗選加工,綜合開發利用煤層氣、煤矸石、煤泥、石煤和泥炭。

Stone coal and its ash , dust , corn , chili , water in vat and boiled water were sampled from the inhabitants ' houses , and fluorine in these media was determined 采集居民家中石煤、石煤燃后底灰、室內降塵、玉米、辣椒、水缸水和開水,分析其含氟量,研究石煤燃燒時氟的遷移富集機制。

Determination of trace tantalum in stone coal slag with flow injection - ion exchange separation and preconcentration - spectrophotometry 分光光度法測定石煤渣中痕量鉭

Selenium concentration and distribution pattern of human hair and the affecting factors in stone coal exposed environment 石煤暴露環境中發硒的含量分布及影響因素

Determination of trace tantalum in stone coal slag with flow injection - ion exchange separation and spectrophotometry 分光光度法測定煤矸石中痕量鈧

Study on technologyical conditions for the extraction of vanadium from stone coal residue 石煤礦渣中釩浸取工藝條件研究