Polluted air emission limit cement industry grow

Polluted air emission limit cement industry grow

Just south of Dallas along Highway 67 in Midlothian is perhaps the country's largest concentration of cement mill plant. TXI, Holcim, and Ash Grove all operate facilities within a couple of miles of each other, and the emissions they pump into the air tend to waft over Dallas when the winds are right, as they are for most of the year.

Slurry electrolysis of metallic lead is galena oxidation and the metal lead in an electrolytic cell to restore the two processes, the metal lead electrolyzer schematic diagram below, the metal lead electrolyzer used diaphragm into the anode chamber and cathode chamber, the metal lead electrolytictank equipped with a stirring device and heating device, the anode material is graphite, the cathode material to lead the beginning of a pole piece.
Those emissions represent the single largest source of air pollution in North Texas and pose a significant risk to human health, and local environmental group Downwinders at Risk has spent more than two decades lobbying for stricter rules. That seemed close to happening three years ago when the Obama administration began drafting what would be the first industry-wide regulations governing cement plants. The EPA held a trio of public meeting nationwide, including one at DFW airport, where 200 people showed up to speak in support of limiting emissions. Rules to that effect were proposed in 2010. Then, nothing.
Electrolytic metallic lead, lead concentrate being added to the anode chamber, galena oxidation of lead chloride and elemental sulfur in the lead concentrate, lead ions through the membrane on the cathode to sponge lead precipitation. Out of the sponge lead metal electrolytic lead to a certain period of time from the cathode chamber, the molten cast lead ingots; out the pulp from the anode chamber, while it is hot filtration, the filtrate return electrolyzer, residues for processing and nickle ore processing.
"At the very last minute, they pulled the rug out from everybody," says Downwinders director Jim Schermbeck.

The proposal just kind of disappeared, Schermbeck says, and has now been replaced with much looser regulations that, among other things, double the amount of particulate matter that can be released and limit monitoring to test burns every couple of years. That seems contrary to the EPA's own determination that particulate matter "may result in tens of thousands of death per year, and many more cases of illness among the U.S. population. Also, the new proposal to cone crusher production has the rules going into effect in 2015 instead of 2013, which could spell doom for any new rules if a Republican is elected president this fall.

转载于:https://www.cnblogs.com/cathyma/archive/2012/08/18/2645224.html