The appearance is like iron, irregular flakes, hard and brittle, one side is bright, the other side is rough, silvery-white to brown, and it is silvery-gray after processing into powder; It is easy to oxidize in the air, dissolves and displaces hydrogen when it encounters dilute acid, and can decompose water and release hydrogen when it is slightly higher than room temperature.
Electrolytic manganese enterprises not only bring GDP growth to the local area, but also bring serious environmental pollution problems, and the waste stored in the electrolytic manganese slag slag yard causes many harm to the environment, and the harm to the environment is as follows:
(1) Manganese-dissolving slag is a waste residue produced by multiple presses, which is an extremely small particle. And the manganese slag still contains iron after a large amount of impuritieshydroxideColloids, which make it difficult to filter the water in the electrolytic manganese slag thoroughly, which is also a reason for the high moisture content of the electrolytic manganese slag. The residual soluble heavy metal ions mainly include ammonia nitrogen, manganese, mercury, arsenic, etc., which will enter the soil through the water cycle and further enter the biosphere and endanger humans.
(2) Nitrogen, ammonia and sulfate exceed the standard. Sampling and testing of surface, groundwater and river bottom sediments near an electrolytic manganese enterprise showed that the contents of nitrogen, ammonia and sulfate exceeded the standard, causing serious water pollution.
Main production areas of electrolytic manganese flakes
In China's electrolytic manganese industry, the manganese triangle at the junction of Hunan, Guizhou and Chongqing is the unyielding concentration place. Due to the early development and rapid development, manganese ore is inXiushan,Pine peachThe supply has been tight, coupled with the local government's repeated collection of resource compensation fees, and dozens of yuan/ton have to be charged out of the county, and the ore price accounts for 1/3 of the cost of electrolytic manganese. Chongqing, Songtao,XiangxiThere is a phenomenon of indiscriminate mining and digging, and only half of the tens of thousands of tons of reserves remain, and resourcesrecoveryIt is very low, only about 50%, and the phenomenon of mining the rich and abandoning the poor is serious.Ore gradeFrom 19% to 16%. But Guangxi has an abundant supply of ore,DaxinThe reserves are 100 million tons, enough for decades
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