49results about How to "No enrichment" patented technology

The invention relates to an iron supplement for a chelating iron desulfurization solution as well as a preparation method thereof. The iron supplement is prepared from hydrous oxide of iron (FexOy.H2O) as well as a metal chelating agent and alkaline by reaction at certain temperature. Compared with the conventional iron supplements, because the iron supplement does not contain impurity anions, such as Cl<1->, NO3<1-> and SO4<-2>, the problem of equipment corrosion caused by Cl<1-> is eliminated effectively; the problem of subsequent wastewater treatment caused by NO3<1-> is also eliminated; most importantly, the separation by crystallization of salt caused by enrichment of SO4<-2> is prevented; the loss of the desulfurization solution can be reduced obviously; the running safety of equipment can be ensured.

The invention relates to a method for directly separating rare earth elements in uranium dioxide or spent fuel, the method comprising the following steps: (1) placing simulated spent fuel in a functionalized ionic liquid, and mixing it uniformly to obtain a solid mixed liquid; (2) placing The solid mixture is stirred and dissolved, and centrifuged to obtain the supernatant and the undissolved uranium dioxide solid or undissolved spent fuel in the lower layer; (3) the metal ion content in the supernatant is measured by ICP-OES, Then calculate the content of the rare earth compound or other fission products dissolved in the ionic liquid; (4) directly perform reprocessing of spent fuel elements on the lower uranium dioxide solid or undissolved spent fuel. The invention has the characteristics of simple process, easy operation, good economy, and environmental protection, and can be used for the removal of rare earth compounds (neutron poisons) in spent fuel reprocessing, including some fission products with large fission yield, and is suitable for industrial applications .

The invention provides an artificial breeding pond capable of reducing incidence of digestive tract diseases of loach and relates to the aquaculture field. The slope-protected pond has the area of 2000m<2> to 3000m<2>, is rectangular in the length-width ratio of 2: 1 or 3: 2, and 80cm-150cm deep; the thickness of sludge at the bottom of the pond is not more than 30cm; the bottom of the pond is inclined towards a drain outlet and provided with a fish pit connected with the drain outlet; the area of the fish pit is 5% of that of the bottom of the pond; the fish pit is 30cm lower than the bottom of the pond; a water inlet is formed 20cm under the surface of the bank of the pond; the surface of the bank of the pond is 150cm wide; the water inlet is formed form a pvc (polyvinyl chloride) pipe and has the diameter of 30cm to 40cm, and a filter screen formed by use of fine-mesh cloth for intercepting harmful organisms is mounted at the orifice of the pipe; the drain outlet is in the bottom of the fish pit at the bottom of the pond diagonally opposite to the water inlet; the drain outlet is provided with a sluice valve against the bank of the pond and also an anti-escape net. A medicine soil layer is paved in the artificial breeding pond capable of reducing the incidence of digestive tract diseases of the loach; a traditional Chinese medicine composition blended with the medicine soil layer can be slowly released into water to prevent and treat digestive tract diseases of loach seedlings and reduce the incidence of digestive tract diseases; the medicine soil layer is blended with clay, and after the medicine soil layer contacts with water, the medicine is slowly released, and the clay is capable of controlling slow release of the medicine.

The present invention relates to an extracted, crystalloid and separated Cannizzaros reaction to prepare polyatomic alcohol and formate. The steps are as follows: (1) Solution agent A is added into the mixture liquid between polyatomic alcohol and formate to form an oil phase of the extracting liquid; the formate together with the residual liquid is to form a water-phase of the extracted liquid; (2) the oil phase and the water phase of the extracted liquid are separated; (3) the water phase of the extracted liquid is crystallized and vaporized to obtain formate crystal; (4) the second solution agent B is added into the oil phase of the extracted liquid in step 2 so as to the polyatomic alcohol is separated out with a crystal mode in the mixture agent between A and B; (5) the solid phase of the polyatomic alcohol is separated from the mixture agent between A and B; (6) The mixing agent of A and B is distilled to separate out the solution agent A and the solution agent B; (7) the solid phase of the polyatomic alcohol is dried to recycle the mixing solution agent A and B left in the solid phase of polyatomic alcohol. The present invention is with much lower investment, shorter producing period, simpler operation, much better product quality and higher benefit.

The invention discloses an iron mine sintering flue gas segmented circulation method. Sintering flue gas high in O2 content on the tail portion of a sintering machine is circulated to the interior of a head flue cover of a sintering feed surface of the head portion of the sintering machine, flue gas of two to three bellows highest in SO2 content in a bellow on the tail portion of the sintering machine is conveyed to a desulfurization system to be desulfurized, and flue gas in other bellows is circulated to a middle flue cover of a sintering feed surface of the middle portion of the sintering machine. After segmented flue gas circulation is adopted, SO2 will not be accumulated in sintering ore, dust emission is reduced by 20-40%, NOx emission is reduced by 20-40%, dioxin emission is reduced by 50-80%, and CO2 emission is reduced by 20-45%.