31results about How to "Improved technical indicators" patented technology

The invention provides a method for manufacturing an artificial medium multilayer ball lens. On a square low-dielectric constant single-sided adhesive foam substrate with a width of L and a thickness of t, high-dielectric constant granular materials are adhered to form a thickness of For an n-layer cube of H, each layer ε is the same, different, or gradually smaller. Then use the mold and hot pressing process to prepare it into a hemispherical shell, and then set the hemispherical shells of different sizes to prepare a hemispherical lens, and finally put two hemispherical lenses of the same size together. A new type of artificial medium multi-layer Lunberg spherical lens is made. The artificial dielectric multilayer ball lens made by this method is ultra-light in weight and ultra-wide in frequency, which can meet the application requirements of single-beam, double-beam and multi-beam antennas. Because it is produced by mold, the product has high consistency and stable performance. Suitable for mobile communication 5G, 4G, WIFI, MIMO and even millimeter wave base station antennas.

The present invention discloses red mud slurry heating method and apparatus for alumina production. The red mud slurry is partially heated before entering the washing and depositing tank to reach the technological process required temperature, and this can improve the deposition performance and washing effect of red mud slurry and ensure the stable and high output running of the washing and depositing tank. At the same time, material is conveyed with bottom pump and steam enters the heater by means of self pressure, so that two kinds of material contact fully to exchange heat, resulting in fast heating, easy operation and saving in energy.

The invention relates to an improved method for producing aluminium oxide by medium-low-grade bauxite, which is characterized in that the production process comprises two-time dissolution processes, i.e. (1) dealuminizing slag is added into the bauxite for carrying out Bayer-process dissolution, and carrying out Bayer-process production of the aluminium oxide; and (2) adding Bayer-process dissolved red mud obtained in the step (1) into alkali liquor, carrying out wet-process dissolution treatment, recovering alkali and aluminium oxide in the Bayer-process red mud. In the method disclosed by the invention, the process of the Bayer process mainly recovers the aluminium oxide in the bauxite, and a wet-process red mud treatment system mainly recovers alkali in the Bayer-process red mud. Dissolved liquor obtained in the Bayer-process part is diluted and purified to remove seed crystal for decomposition, lime is added into the dissolved liquor by wet-process treatment of the Bayer-process red mud to dealuminize, the obtained high-molecular-proportion dealuminized mother liquor is then used for dissolving the Bayer-process red mud, solid-phase dealuminizing slag replacing the lime is added into a Bayer-process system. In the method disclosed by the invention, the process is simple, the energy consumption is low, alkali consumption is low, the recovery ratio of the aluminium oxide is high, the method is suitable for treating the medium-low-grade bauxite mainly in China, the resource utilization ratio is high, the discharged red mud amount is less, and the red mud is easy to be utilized comprehensively.

The invention relates to a process for the roasting, stage grinding, coarse-fine grading and reselection-magnetic separation of hematite. The process is characterized by comprising the following steps of: demagnetizing effusion subjected to first-section grading, and performing coarse-fine grading; performing coarse screwing on coarse grains, and performing first-section permanent magnetism on fine grains; performing fine screwing on concentrates subjected to the coarse screwing, and performing the permanent magnetism on tailings subjected to the coarse screwing; returning middlings subjectedto the fine screwing to a fine screwing process, and performing second-section demagnetizing on tailings subjected to the fine screwing; performing the second-section demagnetizing on concentrates subjected to the permanent magnetism, and performing middle magnetic separation on tailings subjected to the permanent magnetism; performing the second-section demagnetizing on concentrates subjected tothe middle magnetic separation to enter a second-section grading process, returning effusion subjected to second-section grading to the coarse-fine grading process, and performing second-section grinding on silt subjected to the second-section grading; returning products subjected to the second-section grinding to a second-section demagnetizing process; dewatering concentrates subjected to first-section demagnetizing, and performing second-section permanent magnetism on the dewatered concentrates; and mixing the concentrates subjected to the second-section permanent magnetism and concentratessubjected to the fine screwing to form final concentrates, and mixing tailings subjected to the first-section permanent magnetism, dewatered tailings, tailings subjected to the second-section permanent magnetism and tailings subjected to the middle magnetic separation to form final tailings and discarding. The process has a simple flow, and is convenient to control and stable in technical indexes.

The invention relates to lead blast furnace oxygen enrichment smelting technology that adding oxygen into air supplied to blast furnace by blower fan to improve the oxygen concentration to 20-30%. Thus, the reducing atmosphere of the furnace is improved and the processing quantity is increased. The technology index is sharply increased, and the social and economic benefits are notable.

The invention relates to a separation process for magnetic red mixed ore based on iron material disseminated particle size treatment. The process comprises the operation of feeding the mixed ore withthe grade of 27%-29% and with magnetite as a main raw material into first-section closed circuit ore grinding operation to obtain a primary grading overflow product, and is characterized by further comprising first-section weak magnetic and strong magnetic operation, fine screening operation, first-section magnetic separation and first-section washing magnetic separation operation, second-sectionclosed circuits ore grinding operation, second-section weak magnetic strong magnetic operation, second-section magnetic separation and washing magnetic separation operation, third-section closed circuit ore grinding, third-section weak magnetic strong magnetic operation and reverse flotation operation. The final concentrate with the grade of 66%-66.5% is obtained through the operation. Compared with the prior art, the separation process has the advantages that 1) an efficient separation process which is characterized in that the concentrate can be obtained once dissociation is achieved and segmented ore grinding, segmented concentrate taking and segmented tailings discharging are achieved is provided for the magnetic red mixed ore with the non-uniform iron material disseminated particle sizes, so that overgrinding is reduced, and energy conservation and consumption reduction are achieved; 2) magnetic separation equipment is adopted for upgrading, and three sections of ore grinding is carried out by adopting vertical mills; and 3) the process is simple in structure, free of middling circulation, easy to implement on site and easy to produce and manage.

The invention provides a dynamic construction method for a Web service component library, which realizes the search based on potential semantic matching by semantically marking a Web service description document. At the same time, the invention also provides a service search method designed according to the construction method. Because the comparison obtained by the construction method for the Web service component library and the search method thereof is based on the semantic similarity of words and phrases, the problems such as polysemy, synonyms, singular and plural words, misspelling, etc. are solved to a certain extent. Thus, all the technical targets of the Web service search method are improved.

An extracting process for the continuous carbonic acid decomposition procedure in production of aluminium oxide features that the compressed CO2 gas instead of compressed air is used for the extracting and then for the carbonic acid decomposition.