Iron Oxide Black In The Production Of Ammonium Nitrate On The Request
Iron oxide black in the production of ammonium nitrate on the request
Iron oxide black for covering capacity, tinting strength is strong, good resistance to light and used in the industries of coating and paint, also due to the alkali, can be mixed with cement and cement color are widely used in the construction industry, such as polished floor, floor tile, artificial marble, etc.In addition, in printing ink, printing, plastic coloring, polishing and metal detection is also used.
In the production of iron oxide black, release control is more important.
When towards the end of the reaction to make some leftover ferrous hydroxide oxide iron black, quickly to response the liquid into a small amount of ammonium nitrate, so as to complete the reaction.Must first before put in the ammonium nitrate in the reaction liquid adding the sodium hydroxide to PH value to 7 ~ 8.Ferrous hydroxide eventually eliminate, make originally difficult to precipitation slurry soon sank in, so far end of the reaction.Ammonium nitrate delivery must be moderate, however, should not be too much, otherwise it will let some iron black oxidized to ferric oxide and make the color red.