4 results about "Iron alloys" patented technology

Provided are an apparatus for manufacturing a compound powder, a method of manufacturing an iron-boron compound powder by using the apparatus, a boron alloy powder mixture, a method of manufacturing the boron alloy powder mixture, a combined powder structure, a method of manufacturing the combined powder structure, a steel pipe, and a method of manufacturing the steel pipe The method of manufacturing the boron alloy powder mixture includes: preparing a mixed powder including a boron iron alloy powder and a target powder; heat-treating the mixed powder to boronize at least a portion of the target powder and de-boronize at least a portion of the boron iron alloy powder, thereby de-boronizing the boron iron alloy powder to reduce the melting point of the boron iron alloy powder.

The invention provides a device and method for treating oxidation-state nitrogen wastewater by using a combination of iron alloy and anaerobic ammonium oxidation bacteria. The device comprises a towerbody, a water inlet tank, a dosing tank, a water outlet and a gas outlet, wherein a plurality of wastewater treatment layers are arranged in an inner cavity of the tower body, and each wastewater treatment layer is composed of a supporting layer, an iron alloy filler layer and an anaerobic ammonia oxidation sludge granular layer. The wastewater treatment method comprises the following steps: a) feeding and distributing water; b) carrying out a reduction reaction on oxidation-state nitrogen; c) carrying out anaerobic ammonia oxidation; d) adjusting a pH value; e) conducting reactions a plurality of times. According to the device and the method for treating oxidation-state nitrogen wastewater in the invention, the iron alloy fillers reduce a part of oxidation-state nitrogen into ammonia, then the ammonia enters the anaerobic ammonia oxidation sludge particle layers, ammonia and nitrite ions are converted into nitrogen together through anaerobic ammonia oxidation bacteria; and complete removal of oxidation-state nitrogen in the sewage is guaranteed by arranging the multiple layers of the iron alloy fillers and the multiple anaerobic ammonia oxidation sludge particle layers.