Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

1310results about How to "Expand source" patented technology

Method for efficiently separating low-ore grade and complicated iron ore

ActiveCN101413057ALow grain sizeHigh content of water of crystallizationProcess efficiency improvementIronstoneIron powder
The invention provides an efficient separation method for low-grade and complex iron ores. The method is characterized in that the complex iron ores of different grades and species are classified, so as to obtain lump ores and mineral powder which are balled, dried and preheated; reduction roasting, cooling, ball milling, magnetic separation, ball milling and magnetic separation or reverse flotation are performed in turn, so as to obtain iron ore concentrate or reduced iron powder; classification treatment is to crush and screen the iron ores with iron-containing grade between 50 and 56 percent and then dry and preheat obtained ores; fine-grained mineral powder is ground, washed, ground, deslimed and separated so as to obtain the iron ore concentrate and slime containing 58 to 60 percent of iron; the slime which is washed, deslimed, and separated is dewatered and dried and is added to and well mixed additives, so as to be balled then; the iron ores with the iron-containing grade between 40 and 50 percent are crushed and screened so as to obtain the lump ores which are directly dried and preheated, while the fine-grained mineral powder is obtained through dry-type grinding and then is added to and well mixed the additives so as to be balled then; and the iron ores with the iron-containing grade between 25 and 40 percent are crushed and screened so as to obtain the lump ores which are dried and preheated, while the fine-grained mineral powder is subjected to grinding, gravity separation or high-gradient magnetic separation and reverse flotation, so as to obtain coarse iron concentrate powder which is added to and well mixed with the additives and then is balled.
Owner:CENT SOUTH UNIV

Method for producing industrial and agricultural monoammonium phosphate and magnesium ammonium phosphate with wet-process phosphoric acid

The invention provides a method for producing industrial and agricultural grade monoammonium phosphate and magnesium ammonium phosphate with wet-process phosphoric acid. The wet-process phosphoric acid is taken as a raw material. Sodium fluosilicate, monoammonium phosphate solution, monoammonium phosphate filter cakes and magnesium ammonium phosphate are respectively obtained through defluorination and a three-section substep neutralization process, wherein the monoammonium phosphate solution is concentrated and crystallized to obtain high-quality water soluble industrial monoammonium phosphate, and the monoammonium phosphate filter cakes and the monoammonium phosphate mother solution subjected to repeated crystallization are subjected to size mixed and dried to obtain qualified agricultural monoammonium phosphate. The magnesium ammonium phosphate is a good slow release nitrogenous fertilizer per se. The process has the advantages of little investment of equipment, good adaptability of raw material, low production cost and good product quality. The water soluble industrial monoammonium phosphate with low cost can provide a cheap and good water soluble phosphatic fertilizer for modern facility agriculture.
Owner:昆明隆祥化工有限公司

Polyurethane aqueous dispersion and preparation method thereof

The invention discloses a polyurethane aqueous dispersion and a preparation method thereof. The preparation method comprises the following steps: firstly, mixing trimethylolpropane or glycerol and acid anhydride and preparing a carboxylic acid type hydrophilic monomer; on the basis of molar parts, adding 20-60 parts of polymer dibasic alcohol, 4-10 parts of carboxylic acid type hydrophilic monomer and 30-60 parts of a diisocyanate monomer into a reactor, heating to 60 DEG C-100 DEG C and carrying out heat preservation; adding1-10 parts of small-molecular dibasic alcohol, 2-10 parts of a non-ionic hydrophilic chain extender and 1-6 parts of a cross-linking agent and reacting until the content of NCO is less than 5%; and adjusting the viscosity of the reactant, cooling, adding a neutralizing agent for neutralizing, adding water for emulsifying, adding an amine chain extender and removing the solvent by distillation to obtain the polyurethane aqueous dispersion. The carboxylic acid type hydrophilic monomer has stable performance and low cost, the polyurethane aqueous dispersion prepared from the carboxylic acid type hydrophilic monomer has high content of solids and the coating has relatively high hardness and excellent chemical product resistance.
Owner:SOUTH CHINA UNIV OF TECH

Virtual machine mirror image generating method and device based on software preinstallation in cloud environment

The invention discloses a virtual machine mirror image generating method and a device based on software preinstallation in cloud environment. The virtual machine mirror image generating method and the device based on the software preinstallation in the cloud environment comprise that softwares which are uploaded by users are received and dependency of the uploaded softwares are checked, operating system configuration information which is submitted by the users is received and analyzed to obtain analysis results of the operating system configuration information. Basic environment which is necessary to install an operating system based on the software preinstallation technology is generated according to the analysis results of the operating system configuration information. A virtual machine start is started by using a virtual machine start configuration file in the generated environment and a monitoring progress is started at the same time. An operating system installation program is operated in the virtual machine and the operating system is installed in a non-interactive mode. Meanwhile, the monitoring progress judges whether the installation of the operating system is wrong or accomplished or not. When the installation of the operating system is wrong, the virtual machine is closed and temporary files in the basic environment are cleaned and internet protocol (IP) address is returned to an IP address pool. The virtual machine mirror image generating method and the device based on the software preinstallation in the cloud environment can solve defects of an existing manner, wherein the defects of the existing manner are insufficient in flexibility, low in speed, serious in source consumption and the like.
Owner:HUAZHONG UNIV OF SCI & TECH

Method for preparing high-nickel concentrate from low-grade red soil nickel ore

The invention discloses a method for preparing a high-nickel concentrate from a low-grade red soil nickel ore, which comprises the following steps of: drying the low-grade red soil nickel ore until water content is 13 to 16 percent, crushing to ensure that the size of all particles is less than 3mm, grinding by using a high-pressure roller mill to ensure that particles with the size of less than 0.074mm account for 80 percent and specific surface area is not less than 2,000cm<2>/g, adding 15 to 20 percent of composite binder and 1 to 5 percent of coal powder, and pelletizing by using a disc pelletizer to obtain green pellets with the size of 6 to 16mm; drying and preheating the green pellets on a chain grate for water removal and solidification to ensure that each piece of pellet entering a kiln has the compression strength of over 500N; directly adding the preheated and solidified pellets into a rotary kiln, and reducing at the temperature of between 1,100 and 1,250 DEG C for 60 to 120 minutes by using pea coal as a reducing agent in a mass ratio of the reducing coal to the pellets of 0.8-1.0; and cooling a reduction product, sieving, performing magnetic separation to obtain a magnetic product, crushing, grinding, and performing magnetic separation to obtain the high-nickel concentrate, wherein the composite additive comprises the following components: Na2CO3 and CaO, iron oxide powder, the coal powder and sodium humate in a ratio of (30-60):(20-30):(20-30):(5-10). The method is high in adaptability and nickel recovery rate and suitable for mass production.
Owner:CENT SOUTH UNIV

Production method of needle coke raw material

The invention discloses a method of needle coke raw material by using delay coking technique to treat FCC slurry oil and conventional coking raw material. The method comprises: introducing FCC slurry oil with low temperature into a delay coking tower from the upper part inside the tower, leading the introduced FCC slurry oil to be contacted with high temperature oil gas generated by the conventional coking raw material which is introduced into the tower from the bottom and treated by high temperature decomposition, and reacting under the condition of delay coking; and separating the generated oil gas in a coking fractionating tower, and obtaining the needle coke raw material. In the method, as the FCC slurry oil enters into the coking tower at the lower temperature, the decomposition temperature of the conventional coking raw material is lowered, the high temperature decomposition time of the raw material is shortened, the occurrence of secondary reaction is reduced, green coke rate is reduced, the stable operation cycle of a signal tower is prolonged, and light components which have high reaction activity and are not beneficial to producing the needle coke, heavy components with high polymerization activity, and a great deal of impurities such as catalyst powder, heavy metal and the like can be removed. The obtained needle coke has high yield and good properties.
Owner:CHINA PETROLEUM & CHEM CORP +1

Non-sintered ceramic aggregate with stone coal vanadium extraction tailings as main raw material and preparation method thereof

The invention relates to a non-sintered ceramic aggregate with stone coal vanadium extraction tailings as a main raw material and a preparation method thereof. The non-sintered ceramic aggregate comprises the following raw material components in percentage by weight: 45-60 percent of stone coal vanadium extraction tailings, 10-30 percent of fly ash, 7-15 percent of solid alkali exciter, 5-10 percent of cement, 5-10 percent of quick lime, 2-5 percent of gypsum and 5-15 percent of water. The preparation method comprises the following steps of: according to the raw materials and the contents thereof, uniformly mixing the stone coal vanadium extraction tailings and the solid alkali exciter and grinding to be below 0.074 mm to prepare a prefabricated material; adding the fly ash, the cement, the quick lime, the gypsum and the water into the prefabricated material and uniformly stirring to prepare a mixture; aging the mixture for 1-3 hours; pelletizing; aging for 3-7 days; holding in an autoclave; and autoclaving under the condition of 0.8-1.2 MPa for 6-10 hours. The non-sintered ceramic aggregate has the advantages of environmental friendliness, simple process, low energy consumption and high utilization rate of tailings; and a prepared non-sintered ceramic aggregate product has high strength and good thermal insulation performance.
Owner:WUHAN UNIV OF SCI & TECH

Method and device for purifying coke oven gas

The invention relates to a method for purifying coke oven gas. The method comprises the following steps of indirectly cooling coke oven gas to 300-500 DEG C through water in a primary cooler, dehydrating coke oven gas by virtue of a dehydrating tower until the moisture content is 5-10ppm, enabling dehydrated coke oven gas to enter a tar recovery tower, discharging precipitated liquid tar obtained after condensing to the outside, enabling the gas to enter a liquid ammonia recovery tower, cooling to -30 to -50 DEG C and discharging precipitated liquid ammonia to the outside, removing impurities by virtue of a methanol washing tower and enabling the purified coke oven gas to enter a purified coke oven gas tank. The device for purifying coke oven gas comprises the primary cooler, the dehydrating tower, the tar recovery tower, the liquid ammonia recovery tower and the methanol washing tower which are sequentially connected, wherein the tar recovery tower and the liquid ammonia recovery tower are respectively connected with liquid carbon oxide pipelines, the outlet formed in the bottom of the tar recovery tower is connected with a tar recovery device and the outlet formed in the bottom of the liquid ammonia recovery tower is connected with a liquid ammonia recovery device. By cooling, dehydrating, separating tar and liquid ammonia and washing with methanol, impurities and harmful substances in gas are removed, sources of clean fuels are expanded, and thus being conductive to improving the quality of high-quality fuels and reducing the air pollution.
Owner:SHIJIAZHUANG XINHUA IND FURNACE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products