推薦產(chǎn)品
3-(4-chlorophenyl)-4-phenyl-4,5-dihydro-1H-pyrazole 2-(chloromethyl)-3-methylpyridinehydrochloride 1-(2-bromo-4-methylphenyl)ethanone 3-chloroisoquinoline-4-carbonitrile 5,8-dichloropyrido[3,2-d]pyridazine 2-bromomalononitrile 2-(4-(bromomethyl)phenyl)benzo[d]thiazole 1-(bromomethyl)-3-methoxy-2-nitrobenzene 6-bromo-1H-[1,2,3]triazolo[4,5-b]pyridine 4-iodo-2-((trimethylsilyloxy)methyl)thiazole 6-iodoimidazo[1,2-a]pyridine-3-carbonitrile 2-(4-chlorophenyl)-2-morpholinoacetonitrile 4-chloro-7H-pyrrolo[2,3-d]pyrimidine 4-chloroisothiazole 5-bromo-6-chloro-1H-indole 7-chloro-3H-imidazo[4,5-b]pyridine ethyl3-(4-formylphenyl)propanoate 2,3-dibromobenzaldehyde 1-(5H-chromeno[2,3-b]pyridin-7-yl)ethanone 5H-chromeno[2,3-b]pyridin-5-one 3-chloroisoquinoline-4-carbaldehyde (E)-2-(3-oxoprop-1-enyl)benzaldehyde methyl4-formyl-3-nitrobenzoate 5,6-dimethoxy-2,2-dimethyl-2,3-dihydro-1H-inden-1-one 1-methylbicyclo[4.1.0]heptan-3-one 3-nitro-4-(trifluoromethoxy)benzaldehyde 2-hydroxyquinoline-6-carbaldehyde 2-nitro-3-(trifluoromethyl)benzaldehyde 1-(2-fluoro-4-methoxyphenyl)propan-2-one tert-butyl3-fluoro-4-oxopiperidine-1-carboxylate tert-butyl3-oxopropylcarbamate 2,2-dimethylcyclohexanone 9H-carbazole-3-carbaldehyde N,N-dimethyl-2-oxoacetamide 2-methylpent-4-yn-2-ol 3-tert-butyl-4-hydroxybenzonitrile 4-bromo-2-tert-butylphenol 1,3-dibutoxypropan-2-ol methyl4-hydroxyquinoline-6-carboxylate methyl3-cyano-4-hydroxybenzoate 4-chloro-6-methoxyquinolin-7-ol 3,4-dihydro-2H-benzo[b][1,4]oxazin-7-ol 2-(2-aminothiazol-5-yl)ethanolhydrochloride (R)-ethyl2-chloropropanoate (S)-4-amino-5-(4,4-dimethylcyclohexylamino)-5-oxopentanoicacid (1s,4s)-4-hydroxycyclohexanecarboxylicacid (S)-2-(tetrahydrofuran-3-yloxy)aceticacid (1S,4R)-1-methyl-4-(prop-1-en-2-yl)cyclohex-2-enol (R)-4-(hydroxymethyl)oxazolidin-2-one (S)-4-(hydroxymethyl)oxazolidin-2-one 化工資訊 周一，巴西采礦監(jiān)管部門(mén)宣布，將上游式尾礦壩關(guān)停期限延長(zhǎng)4年。
尾礦是采礦(鐵礦石或其他礦物質(zhì))中產(chǎn)生的泥漿，礦業(yè)公司通常會(huì)建大壩來(lái)堆放這些尾礦。其中，上游式尾礦壩是最危險(xiǎn)的，因?yàn)榇髩蔚哪酀{容易滲漏并削弱結(jié)構(gòu)穩(wěn)定性，權(quán)威機(jī)構(gòu)認(rèn)為，這就是導(dǎo)致淡水河谷尾礦壩事件的主因。
淡水河谷尾礦壩事件后，巴西國(guó)家采礦局于二月份禁止建造新的上游式尾礦壩，同時(shí)，采礦局還要求，同類(lèi)型的上游式尾礦壩需在2021年之前停用，到2023年要完全關(guān)停。
周一，政府公布了一則新規(guī)定，規(guī)模較大的上游式尾礦壩需在2027年前完全關(guān)停；規(guī)模較小的尾礦壩的關(guān)停截止日則延長(zhǎng)至2022年。上游式尾礦壩必須在2021年之前停用，這意味著不能在尾礦壩上堆放新的尾礦。
巴西國(guó)家采礦局尚未對(duì)截止日期的變更給出評(píng)論。
