37results about How to "Good decarburization effect" patented technology

A process for preparing ultralow-carbon steel by vacuum degassing features that the argon flow and the vacuum level are dependent on the service age of the furnace, that is, for the initial 20 batches, the argon flow is matched with inner diameter of insertion-in tube, and for the following batch whose decarbonizing time is longer than 5 min, the argon flow is increased by more than 20%. Before decarbonizing the molten steel, the vacuum chamber is depressurized in advance. Within 0-10 min after beginning decarbonization, the depressurizing speed is increased.

The invention provides a biogas slurry decarbonization and deamination combined system. The system comprises a preheater (1), a decarbonization tower (2), a deamination tower (4), a condenser (5), an ammonia water storage tank (6) and a pipeline (7), wherein the preheater (1) preheats a biogas slurry raw material and feeds the biogas slurry raw material into the decarbonization tower (2), and the decarbonized biogas slurry raw material enters the deamination tower (4), is brought out by water vapor in the deamination tower (4), then is cooled by the condenser (5) and enters the ammonia water storage tank (6). By virtue of equipment designed on the device, ammonia nitrogen in biogas slurry can be effectively removed, and energy saving and environment protecting effects are achieved; meanwhile, the whole device is also easy to control and can be further popularized and applied.

The invention discloses a method for producing nickel-based steel from high-phosphorus molten iron, and relates to the technical field of steel smelting. By adopting converter smelting, the P contentof used molten iron is 0.130% to 0.150%, by adopting a method of slag retention at the early stage and double slag at the later stage, the final smelting temperature is 1580-1620 DEG C, in the middleand later periods of smelting, the bottom stirring flow is 350-400 NL/min, the final slag alkalinity is 4.0, the final slag control amount is 10-12 tons, the converter decarburization rate is larger than or equal to 99%, and the dephosphorization rate is larger than or equal to 96%; and through LF refining, RH vacuum treatment, arc continuous casting machine pouring, by adopting TMCP rolling and ACC water cooling to 300 +/-20 DEG C, air cooling is performed to room temperature, a steel plate is heated to 550 +/-10 DEG C, tempering is performed for 3*h min, and air cooling is performed to roomtemperature. The converter process is optimized, a product is conveyed to a heating furnace to be heated after vacuum treatment and casting of an arc-shaped continuous casting machine, TMCP rolling and ACC water cooling are adopted, and after tempering treatment, performance detection is qualified.

The invention discloses a de-oiling furnace for waste oil catalyst, comprising a furnace body; the furnace body is provided with a material inlet and a material outlet; a furnace grate for sending material is disposed in the furnace body; wherein the material inlet and the material outlet are both provided with a cooling device; and a pre-heating chamber, a burning chamber and a cooling chamber are orderly arranged between the material inlet and the material outlet; a firebrick layer is set in the burning chamber; and the furnace wall of the burning chamber is provided with a ventilation door connected with a ventilation room; and the end part of the furnace grate is further provided with a slag remover; a water heating pot cylinder is disposed in the furnace above the burning chamber; the water heating pot cylinder is provided with a drainage pipeline. The invention is featured in simple structure and smart design; the oil, sulfur and carbon compound are removed from the waste oil catalyst by the way of burning; and the heat produced by waste heat is used for heating the media, so as to supply industrial production or other occasions which need high-temperature media.

The invention discloses a coal-saving decarburization combustion improver. The improver is prepared by evenly mixing the following components by weight percent: 20-30% of activated calcium oxide, 9-12% of magnesium hydroxide, 12-20% of sodium carbonate, 8-10% of activated carbon, 12-15% of FeSi powder, 8-12% of manganese dioxide, 3-5% of strontium carbonate and 5-7% of barium hydroxide. By adding the combustion improver of the invention in fire coal, the dosage of coal can be reduced by 2-15%, the thermal efficiency can be increased by 0.5-5%, and the decarburization effect is good.

The invention discloses a moulding and flanging mould for machining automobile parts. The moulding and flanging mould for machining the automobile parts is formed by casting steel, and the steel comprises, by weight, 1.10-1.25% of C, 0.35-0.45% of Si, 0.40-0.50% of Mn, 1.35-1.65% of Cr, 0.35-0.55% of Mo, 1.2-1.6% of W, 0.15-0.25% of Ni, 0.25-0.35% of Cu, 0.8-1.2% of Ga, 1.8-2.6% of carbide, 2.15-2.35% of rare earth metals, less than or equal to 0.03% of S, less than or equal to 0.03% of P, and the balance being Fe. All components of the steel used in the moulding and flanging mould is reasonable in ratio, excellent in performance, little in friction coefficient of prepared mould, excellent in anti-fatigue performance, heat resistance performance and anti-pressing performance, long in service life, low in using cost and good in decarburization effect in the preparing process of molten steel.

The invention relates to a microwave-heated spouted fluidized decarbonization device. The device is provided with a circular fluidized bed body and a straight spouted fluidized pipe; a stirrer, a temperature sensor, a barometer and an outlet valve are arranged on the spouted fluidized pipe; the upper left part of the fluidized bed body is provided with a dust collector, and the peripheral side part is provided with an observation window and a microwave heater; the spouted fluidized pipe is made of a ceramic refractory material; the bottom left of the spouted fluidized pipe is communicated with blown fluidizing gas CO2+H2O, and the bottom right is communicated with N2+Ar inertia protective gas; fluidized powder in the spouted fluidized pipe is subjected to fluidized separation; and the fluidized bed is controlled by a complete program of an electric cabinet circuit microcomputer processor. The microwave-heated spouted fluidized decarbonization device has the advantages of advanced and reasonable design, compact structure, complete functions, safe, reliable and stable microwaving heating, convenient installation and use, good effect and high efficiency of decarbonization, desulfuration and dephosphorization, and the decarbonization rate of 70 to 90 percent, improves the efficiency by 90 percent compared with the prior art, and is an ideal spouted fluidized decarbonization device.

The invention relates to a bio-gas two-stage normal-pressure decarbonization device which is characterized by at least comprising filler towers (1) formed by overlapping through two stages, wherein the bottom of the filler tower (1) positioned at a bottom layer is provided with a bio-gas inlet (2) and a bottom layer absorption liquid regenerative cycle outlet (7), the filler tower (1) positioned at a top layer is provided with a bio-gas outlet (3), the upper part of a filler layer (6) of each filler tower (1) is provided with an absorption liquid spraying pipe (8), a baffle plate is arranged between the adjacent filler towers (1), an air elevation pipe (5) which is communicated with the adjacent filler towers (1) is arranged on the baffle plate (4) in a penetrating way, a liquid drop hole is arranged on the baffle plate (4) and is connected with a liquid drop pipe (9) which introduces absorption liquid settled on the baffle plate out of the filler towers, and the liquid drop pipe (9) extends out of the filler towers (1) from the bottoms of the adjacent filler towers (1) or the bottom of the filler tower (1) at the bottom layer. The invention features simple structure, convenient manufacture and low cost.

The invention belongs to the technical field of gasifier coal gas slag, and concretely relates to a coal carbon slag decarburization method. The method comprises the following steps: adding coal carbon slag into a coal chemical industry gasifier slag decarburization grinder, and grinding the coal carbon slag to form coal carbon slag powder; introducing air into a fluidized bed, controlling the temperature of the air to be 650-720 DEG C and the flow of the introduced air to be 20-40 m<3>/h, and then adding the coal carbon slag powder into the fluidized bed; and reacting the coal carbon slag powder in the fluidized bed for 20-40 min to obtain carbon slag having a free carbon content of 2 wt% or below in order to complete the decarburization of the coal carbon slag. The coal chemical industrygasifier slag decarburization grinder improves the coal carbon slag decarburization method, and makes the coal carbon slag fully ground and crushed before being decarburized, and the crushed coal carbon slag powder is heated, so the improvement of the decarburization effect of the coal carbon slag is benefited; and the temperature and the flow of the air in the gasifier are controlled to make thecoal carbon slag fully reacted in the gasifier, so the decarburization effect of the coal carbon slag is improved.

The invention relates to a processing method for the decarbonization of blast furnace molten iron based on converter LT dust-removing ash. The method includes the steps that the converter LT dust-removing ash, as a decarbonizer, is mixed with the molten iron from a blast furnace to oxidize the molten iron to achieve the decarbonization of the molten iron, so as to reduce carbonaceous dust producedby the drop of the temperature of the molten iron. The processing method for the decarbonization of the blast furnace molten iron based on the converter LT dust-removing ash lowers the content of carbon in the molten iron by adding the converter LT dust-removing ash as the decarbonizer to the molten iron from the blast furnace, so as to fundamentally solve the graphite dust pollution problem caused in the molten iron backward-pouring process in a steel plant. The decarbonizer is the converter LT dust-removing ash from a steel mill. The converter LT dust-removing ash has obvious effect on decarbonizing the blast furnace molten iron, and reduces the content of carbon separated out of the molten iron, so as to alleviate the problem of the graphite dust pollution in the steel mill. Therefore,waste resources are fully used, iron from the converter LT dust-removing ash is recovered, and the utilization value of the converter LT dust-removing ash is improved.

The invention relates to a blast-furnace hot metal decarburization method utilizing blast-furnace dust. The method comprises the steps of S1, adopting the blast-furnace dust as a raw material, and preparing a blast-furnace hot metal decarburizer according to one of the following methods: (1) aerobic roasting, and (2) mixing the blast-furnace dust subjected to aerobic roasting and at least one of iron concentrate powder and steel-rolling ferric oxide sheets according to a certain proportion; and S2, mixing the blast-furnace hot metal decarburizer in the form of powder or blocks with blast-furnace hot metal at the reverse installation process, and oxidizing carbon in the hot metal to achieve a decarburization effect, so that the carbonic powder dust produced by hot metal temperature reduction is reduced. By utilizing the method provided by the invention, the problem of serious graphite dust pollution in the reverse installation process of the blast-furnace hot metal in an iron and steelplant is solved from the root. According to the blast-furnace hot metal decarburization method utilizing the blast-furnace dust provided by the invention, the decarburizer adopts the blast-furnace dust as a basic material, so that on one hand, the decarburization processing of blast-furnace taping is effectively realized, the problem of graphite dust pollution produced in the reverse installationprocess of the hot metal is reduced, meanwhile, iron elements in the blast-furnace dust are effectively recycled, and the use value of the blast-furnace dust is improved.

The invention provides a molybdenum concentrate decarburization agent and a process for reducing carbon content of molybdenum concentrate. The molybdenum concentrate decarburization agent is preparedfrom the following components in parts by weight: 20-25 parts of sodium dodecyl benzene sulfonate, 2-5 parts of phosphate, 1-2 parts of diethanolamine, and 1-2 parts of a dispersant. The molybdenum concentrate decarbonizing agent can be used for reducing the carbon content of the molybdenum concentrate; in the process for reducing the carbon content of the molybdenum concentrate, the molybdenum concentrate decarbonizing agent is prepared into feed liquid, through the methods of ultrasonic treatment, concentration and filter pressing, the decarbonizing rate of the molybdenum concentrate can reach 75% or more, and the molybdenum concentrate with the carbon content less than 0.7% can be continuously and steadily produced; dust raising and environmental pollution are avoided, and environmentalprotection is facilitated; and production energy consumption is low, and resources are saved.

The invention discloses a smelting process for producing ultralow-carbon phosphor nickel series steel by high-phosphor molten iron, and relates to the technical field of steel smelting. The smelting process adopts converter smelting, and phosphor content of the used molten iron is 0.130%-0.150%; a way of leaving slag at an early stage and using a dual-slag process at a later stage is adopted, a smelting terminal temperature is 1580-1620 DEG C, bottom stirring flow at the middle and later period of smelting is 350-400 NL/min, final basicity of slag is 4.0, final slag control amount is 10-12 tons, a converter decarburization rate greater than or equal to 99% is realized, and a dephosphorization rate greater than or equal to 96% is achieved. The converter process is optimized, and the nickelseries steel smelting process meets batch industrial production needs.

An activation synergist for natural gas decarburization based on an MDEA method is an activation synergist for natural gas decarburization based on the MDEA method, the activation synergist comprises an amidine compound, an alcohol compound, an alcohol amine compound and a rubber swelling corrosion inhibitor, the provided activation synergist can effectively improve the removal of carbon dioxide, during the process application process, good circular utilization of the activation synergist is realized, the regeneration of the activation synergist can be realized at a low temperature, and the activation synergist has the characteristics of low energy consumption, high CO2 removal efficiency, and low equipment corrosion, and has a good popularization and application prospect.