34results about How to "Reduce Pollution Potential" patented technology

The invention discloses a novel method for direct extraction recovery of ammonia nitrogen from electrolyzed manganese slag. The novel method comprises the following steps of directly adding an alkaline preparation and a foaming agent into fresh manganese slag subjected to crushing, dispersion, drying and ball-milling so that a pH value and humidity in an electrolyzed manganese slag environment are changed and transformation of a solid phase and a liquid phase into a gas phase is promoted, and introducing released NH3 gas into a multistage absorption device by a negative-pressure suction device cover located above a mixer so that the released NH3 gas is absorbed by water or dilute sulphuric acid and then is transformed into ammonia water or ammonium sulfate. The novel method for direct extraction recovery of ammonia nitrogen from electrolyzed manganese slag solves the problem that the existing extraction recovery methods have high water consumption, high energy consumption and complex processes, greatly reduces environmental pollution hidden troubles of ammonia nitrogen in manganese slag, and realizes extraction and utilization of an ammonia nitrogen resource well.

The invention discloses a sample preparation and transfer control method. The operation of the sample preparation and transfer system includes: a management and control system (600) for real-time acquisition of an automatic storage and inspection sample cabinet (100), a pneumatic conveying system (200), an automatic sample unloading sample bottle cleaning machine ( 300), automatic packaging machine (400), automatic sample preparation machine (500) and control the sample preparation process, cleaning process and cleaning process through instructions. The sample preparation and transfer control method of the present invention can realize fully closed automation of sample preparation, storage, transportation, and cleaning processes, avoid manual intervention, and improve the accuracy and effectiveness of samples.

A magnesium concrete is composed of the magnesium cement grout prepared from light burnt magnesium oxide, magnesium chloride and water and the modifying filler composed of the phosphogypsum and / or the ash of rice husk, rice straw and wheat straw. It has low cost.

The invention relates to the technical field of sand mold casting, and concretely relates to a box division molding machine. The box division molding machine comprises a sandbox, a lower box molding device, an upper box molding device, a walk device and a push device, and the sandbox is a rectangular box body; the lower box molding device and the upper box molding device are positioned in the sandbox, the lower box molding device is positioned at the left side of the sandbox, and the upper box molding device is positioned at the right side of the sandbox; the walk device is positioned above the sandbox, the upper ends of the walk device and the lower box molding device are connected with the upper end of the upper box molding device, and the walk device is used for moving the lower box molding device and the upper box molding device; and the push device is positioned just behind the lower box molding device, and the push device is used for sending box closed sand mold to a conveyer belt and allowing the box closed sand mold to enter a next process. The box division molding machine adopting a manual coal beating machine principle realizes automatic production of box division castings, and also has the advantages of simple structure, low manufacturing cost and high production efficiency.

The invention relates to an efficient comprehensive utilization method of arsenic and antimony in arsenic and antimony smoke and belongs to the technical field of non-ferrous metallurgy. The method comprises the specific steps that the arsenic and antimony smoke is subjected to stge treatment, fine powder smoke obtained through separation is put into hot water according to the formula that the liquid-solid ratio is 5:1, agitation leaching is conducted for 60 min at the temperature is 85 DEG C, and solid-liquid separation is conducted after leaching; an oxidizing agent is slowly added into leaching liquid, the volume percentage of the oxidizing agent is 3%, stirring is continuously conducted for 60 min, and arsenic-containing leaching post-liquid and antimony-containing leaching residues are obtained after filtering; a sodium salt solution is added into the leaching post-liquid, the mixture is subjected to low-temperature concentration and crystallization under the microwave condition after sufficient stirring, sodium arsenate crystals are obtained after centrifugal filtering, and crystallization mother liquor is used circularly; and the sodium arsenate crystals are sent to microwave drying equipment to be dried, and products are obtained after drying. According to the method, the arsenic and antimony smoke is subjected to stage treatment according to the grain size, enrichment and separation of arsenic and antimony can be achieved, operation is easy, and the cost is effectively reduced; and separated arsenic-enriched smoke is leached, refined and crystallized, arsenic products are formed for export sales, antimony-containing materials return to the procedure, and resource recycling is achieved.