38results about How to "Increase the oxidizing atmosphere" patented technology

A sintering device with hot-air oxygen enrichment and a sintering method with hot-air oxygen enrichment are provided, which belongs to the technology field of sintering production in steel industry. The device comprises a filter equipment, a blower, a cooler, a member module, a suction pump, a separation unit, a nitrogen-rich gas tank, a buffer tank and an oxygen-rich gas tank mutually connected via a gas pipeline in turns. The flow passing through the material layer is heated by the flue gas waste heat introduced in a cooling machine to facilitate the sintering temperature of the upper material layer rising, reduce the temperature difference between the upper and lower layers and improve sinter quality and reduce energy consumption. The introduction of the oxygen-rich air can obviously improve fuel combustion conditions and reinforce the oxidizing atmosphere of material layers, thereby achieving the advantages of improving drum strength and productivity of sinter, reducing fuel consumption and improving sinter metallurgical property, etc. The oxygen-enriched process has simple flow, compact structure, no environmental pollution, fast effect and long service life.

The invention discloses a roasting method for refining vanadium pentoxide, which comprises the steps, performing heating roasting to a mixture of raw ore of stone coal navajoite and decarburization slag of the stone coal navajoite, or the raw ore of the stone coal navajoite, or the decarburization slag of the stone coal navajoite, or a vanadium-containing material containing tiny combustible components, or a vanadium-containing material containing no combustible component which serves as a raw material; enabling the raw material to enter into a roasting chamber at an ignition point lower than that of contained carbon or in a normal-temperature state so as to be roasted; enabling a roasting heat source in the roasting chamber to be high-temperature gas directly sprayed into each part of raw material through at least one group of pipelines arranged in the roasting chamber and / or a combustible material evenly sprayed in the raw material through at least one group of pipelines arranged in the roasting chamber, and performing ignition; and being capable of performing crushing, grinding, pelletizing, addition of an additive and the like before the raw material enters into the roasting chamber. The roasting method has the advantages of being scientific and reasonable, low in energy consumption and oxygen consumption, high in vanadium conversion rate and yield and low in pollution.

The invention discloses a formula and a method for manufacturing ceramic tile blank bodies by utilizing polished waste residues. The formula adopts ingredients by weight portions: porcelain clays account for 18 to 40 parts, clays account for 20 to 30 parts, limestone grains account for 1 to 10 parts, wollastonite grains account for 3 to 15 parts, glazed tile sludge residues account for 3 to 10 parts, ceramic polished waste residues account for 15 to 45 parts, soluble glass accounts for 1 to 2 parts, thinners account for 0.15 to 0.4 parts, sodium tripolyphosphate accounts for 0.05 to 0.2 parts, and a proper amount of water is adopted. A manufacturing method of the ceramic tile blank bodies comprises the steps as follows: a. raw materials are put in a ball grinder for ball milling after being blended so as to form sizing agents with proper fineness and screen tailings through milling, and the sizing agents are processed through deferrization, sieving and spray drying so as to form powders; and b. the powders are put in a die cavity of a press forming machine to form waterish blanks through pressing, the waterish blanks are dried in a drying kiln, the dried waterish blanks are applied with base pulp and then enter a biscuit firing kiln, biscuit firing is carried out under the temperature ranging from 1080 to 1160 DEG C, heat preservation is carried out in an area with the temperature ranging from 1040 to 1060 DEG C, the sintering time of the area is prolonged, and the sintering process for oxidizing atmosphere can be enhanced at the same time so as to obtain the ceramic tile blank bodies.