10results about How to "Improve smelting efficiency" patented technology

The application provides a novel natural gas melting furnace, which comprises a furnace body, the top of the furnace body is connected with an environmental protection pipeline, and the bottom is provided with a discharge port; a heating mechanism, the heating mechanism comprises burners which are installed on the inner wall of the furnace body and are arranged in a circumferential direction; the input end of the burner penetrates through the furnace body and is connected with external natural gas and combustion-supporting gas respectively; a grate mechanism, the grate mechanism is located above the heating mechanism and comprises a plurality of parallel grate pipes; the two ends of the grate pipe penetrate through the side wall of the furnace body and are internally provided with hollow water channels; the plurality of grate pipes are arranged in a special shape, which is used for increasing the contact area of the support surface and the fire source. According to the technical scheme provided by the embodiment of the application, the independent grate pipes are installed in the interior of the furnace body, so that the grate pipes can form support planes in various shapes such as wave shape, triangle, U shape and trapezoid, thereby effectively increasing the heating area and improving the smelting efficiency of the ore.

The present application relates to a kind of industrial silicon composite reducing agent prepared with fruit skin humus, and belongs to the technical field of composite reducing agent for industrial silicon smelting.The fruit skin is cut into fruit skin particles, water is added to cover the fruit skin particles, then yeast powder is added and sealed for fermentation to obtain fruit skin humus;non-caking coal powder, fruit skin humus, starch, wood powder and microsilica powder are mixed and then ground to clump to obtain a mixture;the mixture is pressed to form a cylindrical pellet embryo;the cylindrical pellet embryo is placed in an argon environment and subjected to microwave calcination, and then cooled to room temperature in the furnace to obtain an industrial silicon composite reducing agent pellet.The industrial silicon composite reducing agent pellet has a strength of 10-14 MPa, a calorific value of 7200-8000 calories / gram, and a caking index of 49-72, which meets the preparation requirements of industrial silicon pellet reducing agent.

The invention provides sintered ore with a coating structure and a preparation method and system.The preparation method comprises the steps that lump ore is subjected to high-temperature preheating treatment and then crushed and screened, and lump ore particles are obtained; uniformly mixing an iron-containing raw material, a CaO-containing flux, a fuel and water to obtain an outer-layer mixed material; after the lump ore particles are put into a disc pelletizer, atomized water is sprayed to the surfaces of the lump ore particles; caO is sprayed to the surfaces of lump ore particles; the outer-layer mixed material is added into a disc pelletizer, atomized water is continuously sprayed for pelletizing, screening is conducted after pelletizing is finished, and a green pellet mixed material is obtained; conveying the green pellet mixture to a sintering machine, igniting the green pellet mixture, and sintering the green pellet mixture under the condition of injecting hydrogen-rich gas to obtain high-temperature sintered ore; and hydrogen is adopted as a cooling agent to cool the high-temperature sintered ore, and pre-reduction of the high-temperature sintered ore is achieved in the cooling process. The sintered ore has high strength and air permeability, the utilization ratio of lump ore is increased, lump ore fragmentation is avoided, and therefore the metallurgical performance of the lump ore is improved.

This invention discloses an automatic bottom-blowing adjustment system for converters based on gas source conversion, relating to the field of converter metallurgy. Specifically, it includes a human-machine interface module, a steel grade identification module, a processing module, a smelting judgment module, a bottom-blowing flow control module, and a flow optimization and adjustment module. The human-machine interface module stores and inputs steel grade information, including the steel grade name, grade, and whether there are special requirements for nitrogen and oxygen content. The steel grade identification module automatically identifies and reads the steel grade information stored in the human-machine interface module and transmits the information to the processing module and the bottom-blowing flow control module. This invention achieves personalized bottom-blowing flow optimization at different smelting stages by precisely adapting to the characteristics of high-carbon steel, low-carbon steel, and alloy steel, reducing quality problems, improving product quality stability and consistency, and dynamically adjusting the flow based on multi-source real-time data to avoid unreasonable issues, thereby improving smelting efficiency and reducing costs.

The present application relates to a kind of full coal high-value preparation silicon smelting composite reducing agent pellet method, belong to carbonaceous reducing agent pellet preparation technical field.The present application is broken to particle size less than 0.2mm by grinding to vacuum drying full coal pulverized coal;Coffee shell powder is added to NaOH solution and soaked and activated, and coffee shell binder is obtained by solid-liquid separation;Full coal pulverized coal, coffee shell binder, microsilica and silica powder are ground and mixed to obtain coal powder mixture;Coal powder mixture is formed by pressing to obtain cylindrical blank;Cylindrical blank is placed in argon atmosphere and microwave calcination is carried out, and it is cooled to room temperature with furnace to obtain silicon smelting composite reducing agent pellet.The strength of the silicon smelting composite reducing agent pellet of the present application is 9~13MPa, which meets the needs of industrial silicon production, and after industrial test of the pellet, the silicon yield can reach 40~70t / d, the power consumption is 10500~12000KW·h / t, and the carbon excess coefficient is 1.1~1.7.

The utility model discloses an acid sinter proportion regulating and controlling device, which is applied to the technical field of sinter production and comprises a proportioning tank, raw material tanks are fixedly communicated with two sides of the top of the proportioning tank, a motor is bolted to the top of the proportioning tank, and a first mixing rod rotationally connected with the proportioning tank is bolted to the output end of the motor. And a rotating disc is welded on the surface of the first mixing rod. In the ore mixing process through rotation of the first mixing rod, the second mixing rod revolves around the surface of the first mixing rod, and meanwhile, the second mixing rod rotates in the direction opposite to that of the first mixing rod to conduct secondary mixing on the ore. Therefore, the mixing efficiency during ore proportioning is improved, and subsequent smelting of a blast furnace is facilitated. In the ore mixing process, the screening net is driven to continuously vibrate up and down, and the ore is screened. Therefore, blocky large ore can be separated out and prevented from entering a blast furnace to be smelted, the ore smelting efficiency is improved, and the effect after smelting is guaranteed.

The utility model belongs to the technical field of low-carbon metallurgy, and provides a gas-based shaft furnace direct reduction iron recovery production device which comprises a shaft furnace body used for producing direct reduction iron, a charging unit and a recovery unit are arranged at the top of the shaft furnace body, and a discharging unit is arranged at the bottom of the shaft furnace body; the material distributing unit comprises an inlet, a first outlet and a second outlet, the inlet is connected with the material discharging unit, the first outlet is used for discharging qualified direct reduced iron, and the second outlet is used for discharging unqualified direct reduced iron; and the conveying unit is connected with the second outlet and is used for conveying the unqualified direct reduced iron to the recovery unit. According to the scheme, the problems of high production energy consumption, dust pollution, low smelting efficiency, heat loss and the like in the recovery treatment process of the unqualified direct reduced iron in the prior art can be effectively avoided.

The utility model discloses an industrial silicon smelting device, which belongs to the technical field of industrial silicon smelting and comprises a furnace body and a connecting box, sliding plates are symmetrically mounted on two sides of the inner wall of the connecting box in a sliding manner, and a first guide plate, a first screening plate and a second screening plate are fixedly mounted on the sides, close to each other, of the two sliding plates in a staggered manner; a supporting plate is fixedly installed between the two sliding plates, a supporting frame is fixedly installed between the two sides of the inner wall of the connecting box, crushing rollers are symmetrically and rotationally installed on the inner wall of the supporting frame, a driving assembly is installed at one ends of the crushing rollers, and a transmission assembly matched with the driving assembly is installed on the supporting plate; a partition plate is fixedly installed at the bottom end of the inner wall of the connecting box, a first discharging pipe is fixedly installed on one side of the connecting box, a vertical pipe is fixedly installed at one end of the first discharging pipe, and a conveying assembly is installed in the vertical pipe. The device has the advantages that the smelting efficiency and the particle screening precision are improved, crushing and screening are integrated, maintenance and cleaning are convenient, and partition is clear.

The present application belongs to the technical field of steel metallurgical production, and particularly relates to a pellet-electric furnace cogeneration system and method, wherein the system comprises: a chain grate machine for drying and preheating carbon-containing green pellets; a rotary kiln connected with the chain grate machine for reducing the preheated green pellets to generate metallized pellets and reducing gas; a waste gas utilization device for introducing the reducing gas into the chain grate machine for waste heat utilization, and using the utilized gas as auxiliary fuel for the chain grate machine combustion section and the rotary kiln; and a horizontal continuous charging electric furnace with a scrap steel preheating section communicated with a rotary kiln discharge end, which utilizes high-temperature metallized pellet waste heat and electric furnace flue gas to preheat the scrap steel, and the preheated material is fed into the electric furnace body for smelting. The present application realizes hot-state direct charging of metallized pellets into the electric furnace, avoids heat loss in the cooling and transfer process, significantly reduces electric furnace smelting energy consumption, and improves production efficiency.

The invention provides a pellet with a coating structure and a preparation method and system.The preparation method comprises the steps that lump ore is subjected to high-temperature preheating treatment and then crushed and screened, and lump ore particles are obtained; uniformly mixing the iron ore concentrate powder, bentonite, CaO and water to obtain an outer-layer mixed material; after lump ore particles are put into a disc pelletizer, atomized water is sprayed to the surfaces of the lump ore particles till the surfaces of the lump ore particles are wet; caO is sprayed to the surfaces of lump ore particles; adding the outer-layer mixed material into a disc pelletizer, continuously spraying atomized water for pelletizing, and then screening to obtain green pellets; sequentially drying, preheating and roasting the green pellets to obtain high-temperature pellets, and cooling and pre-reducing the high-temperature pellets by adopting hydrogen as a cooling agent to obtain pellets with a coating structure. The pellet has high strength and air permeability, the utilization ratio of lump ore is increased, lump ore fragmentation is avoided, and therefore the metallurgical performance of the lump ore is improved.