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51results about How to "Efficient digestion" patented technology

Methods for digesting and detecting titanium concentrate, titanium slag or titanium carbide slag

The invention discloses methods for digesting and detecting titanium concentrate, titanium slag or titanium carbide slag. The method for digesting the titanium concentrate, the titanium slag or the titanium carbide slag comprises the following steps of: weighing a sample to be detected, placing the sample to be detected in a container, washing a container wall of the container by using an appropriate amount of deionized water, and shaking the container to make the sample be suspended and dispersed; adding hydrofluoric acid and hydrochloric acid into the container, closing the container, and performing first-time digestion reaction by using microwave; after the first-time digestion reaction is finished, cooling the container, and when the temperature of the container is reduced to 90 to 95 DEG C, emptying acid gas and a volatile reaction product in the closed container; opening the container, adding hydrogen peroxide while the container is hot, and then immediately closing the container; performing second-time digestion reaction by using the microwave; and after the second-time digestion reaction is finished, cooling the container to room temperature, directly diluting by using water and fixing the volume, and thus obtaining a solution of the sample to be detected. According to the methods, the sample is completely digested, and the accuracy, precision, working efficiency and analysis speed of detection data can be improved.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP

Digestion method and digestion device for quickly digesting carbon monoxide

The invention discloses a digestion method and a digestion device for quickly digesting carbon monoxide, and belongs to the technical field of toxic gas purification. The method comprises the following steps: spraying solid catalyst powder into a carbon monoxide enrichment space so as to oxidize carbon monoxide into carbon dioxide and realize rapid digestion of carbon monoxide by utilizing the mechanical motion or Brownian motion of the catalyst powder and the principle of catalytically oxidizing carbon monoxide by using a catalyst. The device comprises a catalyst powder storage tank, a spraying device, a pressure release valve, a vacuumizing/inflating port and a siphon. The upper end of the catalyst powder storage tank is a tank opening; a material spraying device is arranged on the tankopening; the siphon is positioned in a tank body of the catalyst powder storage tank; the upper end of the siphon is connected with the spraying device, and the lower end extends to the bottom of thecatalyst powder storage tank; and the upper part of the tank body of the catalyst powder storage tank is connected with a pressure release valve and a vacuumizing/inflating port. The method and the device have the advantages of being high in carbon monoxide digestion speed, low in cost and suitable for fire and explosion sites, thereby preventing carbon monoxide from hurting people in distress.
Owner:CHINA UNIV OF MINING & TECH

Method for determining elementary composition of cobalt pyrite concentrate, and digestion method for cobalt pyrite concentrate sample

The invention relates to a method for determining elementary composition of cobalt pyrite concentrate and a digestion method for a cobalt pyrite concentrate sample, belonging to the field of detection and analysis technology. To overcome technical problems in the prior art, the invention provides the digestion method for the cobalt pyrite concentrate sample. The digestion method comprises the following steps: weighing the cobalt pyrite concentrate sample, putting the sample in a container, directly adding water, concentrated nitric acid, hydrofluoric acid and hydrogen peroxide in sequence and then enclosing the container; carrying out gradient heating in three stages by using microwave heating so as to realize digestion; and after completion of digestion, carrying out cooling and then carrying out diluting with water until a volume is fixed so as to obtain a sample detection solution. Compared with the prior art, the digestion method provided by the invention has the advantages that operation is simple and fast; sample digestion is rapid and complete; reagents are simple and low in consumption; few examination steps are needed; flow is short; ICP-OES realizes simultaneous determination of gas, metallic elements, major elements and trace elements; technological performance indexes are excellent; and the range of detection elements and contents is wide; etc.
Owner:PANGANG GROUP RESEARCH INSTITUTE CO LTD

Method for treating VOCs waste gas in petrochemical industry through normal-temperature high-efficiency catalytic degradation

The invention discloses a method for treating VOCs waste gas in petrochemical industry through normal-temperature high-efficiency catalytic degradation and belongs to the technical field of waste gas treatment. The method disclosed by the invention comprises the following steps of: enabling waste gas to enter a first spraying tower from the bottom, collide relative to each other with alkaline spraying liquid sprayed from top to bottom and neutralize acid ingredients to form salt, trapping dust, discharging from the bottom, and enabling the waste gas to be discharged from the top; enabling the waste gas to enter a second spraying tower from the bottom, collide relative to each other with spraying liquid sprayed from top to bottom and dissolve soluble ingredients to form a dissolved solution, discharging from the bottom, introducing ozone into the waste gas discharged from the top, and carrying out oxidation reduction reaction under the action of a CeMnO3 / TiO2@SiO2 catalyst to generate CO2 and H2O, so that waste gas treatment is completed. The treatment method disclosed by the invention has the advantages that a large number of 'gas state' hydroxyl free radicals are produced and released and are fully contacted with gas state VOCs molecules as no interphase resistance exists, so that efficiency of treating 'gas' with 'gas' is greatly improved, and VOCs are rapidly and efficiently degraded into micromolecules such as CO2 and H2O and extremely small amount of inorganic salt.
Owner:淄博宝泉环保工程有限公司
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