38results about How to "Increase smelting strength" patented technology

The invention relates to a method for utilizing iron containing metallurgical dust, which comprises that: steel-making sludge, metallurgical dust-removing powder and iron scale are mixed; the mixed raw materials are sent into a rotary kiln and dried, and the drying temperature is determined according to moisture content of the raw materials and controlled to be between 300 and 500 DEG C; the dried materials are cooled by a cooler, the cooled materials are added with 5 to 10 percent of caking agent by weight, and the material and the caking agent are fully stirred evenly by a wheel-rolling mixer; and finally, the mixture is pressed into cooled agglomerated pellet products by a twin-roller machine, the pressure of the twin-roller machine is more than or equal to 500 Kg / cm<2>, and the cooled agglomerated pellet products are prepared into finished products after separation by a vibration sieve. The method has the advantages of low production energy consumption, high product strength, low moisture content and good quality, and can realize full effective utilization of resources; and the finished products of cooled agglomerated pellets can be directly used as a cooling agent and a slag former in steel making, can improve smelting effect and achieve functions of cooling and slag forming, and can be also used for blast furnace process.

The invention relates to a one-step copper smelting technology and a device thereof. The interior of a furnace body is divided into three zones, namely a smelting zone, a blowing zone and a refining zone, by a retaining wall; and two rows of spray guns which are arranged in a staggered manner and have an included angle with a vertical line are arranged at the bottoms of the zones; return dust is mixed and then added into mixed copper concentrate and a solvent through a charging opening of the smelting zone, oxygen-enriched air is sprayed through the spray guns to carry out self-heating smelting, to generate copper matte; the spray guns in the blowing zone spray oxygen-enriched air so as to blow copper matte into crude copper and slag; the spray guns in the refining zone supply oxygen-enriched air for oxidization, and supply natural gas as a reductant for reduction, and the generated anode copper with high purity is interruptedly discharged form a copper discharging opening, so that the low-altitude pollution problem caused by SO2 can be solved, the operation environment can be greatly improved, the utilization rate of sulfur and heat can be obviously increased, and further the economic benefits can be increased further; in addition, the invention provides a one-step copper smelting technology which is more advanced, shorter in flow, lower in investment, lower in comprehensive energy consumption, higher in recovery rate, and better in comprehensive utilization in comparison with the existing continuous copper smelting technology.

The present invention provides an anhydrous stemming for blast furnace. Its composition includes (wt%) coarse brown corundun 1-4%, fine brown corundum 2-5%, coarse mullite 7-15%, fine mullite 9-20%, coke powder 15-20%, clay 10-19%, silicon carbide 7-11%, sericite 5-8%, bitumen 2-4% and anthracene oil 15-25%. It has good working property, stable high temperature resistance, excellent caking property, quick agglutinating property, low ton-iron stemming consumption, low contraction rate and high strength, it can raise tap up-to-standard rate to 100% from original 61.5%, can raise production safety of blast furnace, and can raise smelting strength.

The invention provides a method for manufacturing metallic pellets by direct reduction of oxygen-enriched combustion in a rotary furnace, which belongs to the technical field of steel industry for manufacturing metallic pellets (or direct reduction iron). The method is characterized in that oxygen enriched air is adopted as an auxiliary fuel gas; the oxygen enriched air enters a heat exchanger through a blower; and after the heat exchange between the oxygen enriched air and high temperature flue gas is performed, the temperature rises to 400 DEG C to 600 DEG C, and then the oxygen enriched air enters the rotary furnace. The invention breaks through the limitation of the prior air taking as a combustion medium and fixing the oxygen content, realizes the actual demand that the oxygen content in the combustion medium is controllable, further enhances the heat efficiency of the rotary furnace, reduces over 35% of air consumption amount, reduces over 31% of total consumption amount of the auxiliary fuel gas; and the coal gas consumption, the flue gas discharge capacity and the investment cost are reduced, and conforms to the national policy requirements of energy conservation, emission reduction and circulation economy.

The invention discloses a method for treating iron-containing dust in an iron and steel plant by using a cupola furnace, belonging to the technical field of iron making. The method is characterized by comprising the following steps of: blending, uniformly mixing, briquetting and maintaining raw materials including dust in the iron and steel plant, a carbonaceous reducing agent, a bonder and an additive, and then putting the raw materials into the cupola furnace for iron making, wherein the carbon content of carbon-containing pellets prepared by briquetting raw materials of various iron-containing dust in the iron and steel plant is about 10%, the compressive strength of the maintained pellets is greater than 1000N per each pellet, and the pellets are distributed into the cupola furnace for iron making through a material distribution system; and preheating blast through a hot blast furnace, preheating the wind temperature from a normal temperature to about 500-1200 DEG C, and enriching oxygen by 1-5% in the blast to achieve the aims of improving the smelting strength, increasing the output and reducing the coke ratio. By adopting the method, the dust of the iron and steel plant can be recycled to achieve the aims of saving energy, reducing emission and reducing environmental pollution, so that the method has good economic and social benefits.

The invention provides a magnesium-rich bentonite binder for pellets. The magnesium-rich bentonite binder comprises the following raw material components: 20-30% of magnesite powder, 50-60% of bentonite and 10-20% of borax. The MgO content in the bentonite binder is 28-32%, and the SiO2 content is less than 50%; and the 200-mesh passing rate is more than 90%. The adding amount of the bentonite binder accounts for 2.0-3.0wt% of the total weight of pellet ore raw materials. According to the magnesium-rich bentonite binder disclosed by the invention, the MgO content in the pellet ore can be improved by 1-2%, the grade of sintered ore is improved, the mechanical strength of the pellet ore is simultaneously improved by 1-2%, the smelting in a blast furnace can be strengthened, the problems of material slip and material collapse caused by shutoff pressure due to poor air permeability of a charge of the blast furnace are reduced, the accidents of the blast furnace are reduced, the utilization coefficient of the blast furnace is improved, the initial softening temperature is increased by 100-150 DEG C, the yield of the blast furnace is increased by above 5%, and the ratio of putting coke into the furnace is reduced by 10kg, so that a foundation is laid for oxygen-rich, coal injection and large-ore batch operation of the blast furnace and the smooth production of the blast furnace is ensured.

The invention relates to a novel hydrogen-carbon smelting reduction ironmaking process which comprises the steps of preheating and prereduction of iron ore powder, smelting, slag and iron separation, hydrogen preheating and coal gas reforming. The novel hydrogen-carbon smelting reduction ironmaking process is characterized in that after the iron ore powder is preheated and prereduced, hydrogen and coal are used as reducing agents in the final reduction process and iron ores are subjected to final reduction in a smelting reduction mode; the slag and iron separation of molten liquid iron and molten slags is implemented in a siphon mode; high temperature gas exhausted from a final reduction furnace is subjected to reforming, gas making by coal gas, dust removal and temperature reduction and is subjected to pressure swing adsorption system processing after exchanging heat with the hydrogen; and heat required by the complete process is provided by the oxygen-coal combustion and the secondary combustion of reduction gas. Compared with the existing process, the process has the advantage that the CO2 discharge is reduced by about 10 percent.

The invention discloses a new iron-smelting process of adding magnesium oxide scientifically in blast furnace, and it is characterized in that the magnesium oxide is made to additive which is mixed with raw coal and made to coal powder containing magnesium oxide and is injected into blast furnace 1 from tuyere 4. The invention also provides the magnesium oxide addictive which is used for iron-smelting in the new process. The formulation of the addictive calculated by weight is: MgO 80-83; CaO 12-14; SiO21-2; fire waste 4-6. The main component magnesium oxide can be replaced by magnesium compounds. The invention is modifying the preexisting process of adding magnesium oxide to sintered ore to the new process of adding magnesium oxide into the furnace through tuyere 4 by using coal powder. By applying the process in this invention the air permeability in lump area 2 can be improved; the thickness of reflowing area 3 can be decreased; the combustion efficiency of coal powder can be increased and the flowability and desulfurizing ability can be improved, which is good for the increase of the smelting strength of blast furnace and the yield and quantity of foundry iron.

The invention provides furnace-protecting anhydrous stemming which comprises the following raw material chemical components by weight: 15-25% of corundum powder; 15-20% of coke powder; 15-20% of clay powder; 9-14% of silicon carbide powder; 2-4% of asphalt powder; 15-25% of anthracene oil; and 9-11% of titanium dioxide powder. The stemming of the invention has the characteristics of high strength, low shrinkage, and good caking property, has stable high temperature resistance, can be sintered rapidly, can prolong tapping time and ensure tapping smoothness, provides an iron notch drilling-trhough rate of above 95%, avoids the iron-leaking phenomenon and accidents of iron notch fracture and channel enlargement due to a shallow iron notch, increases the smelting intensity, reduces production cost, and ensures the safe running of blast furnace production. Especially, a titanium sediment wear-resistant protection layer with a small thermal conductivity coefficient and good corrosion resistance is formed, which has the effect of protecting the hearth and the furnace wall near the iron notch, and thus prolongs the service life of the blast furnace hearth and the furnace wall.

The invention discloses a blast furnace ironmaking method. The method includes adding ironmaking raw materials to a blast furnace for smelting; and the ironmaking raw materials contain sinter and pellet, which account for more than 98% of a total weight of the ironmaking raw materials. Melting conditions include: hot-blast temperature in the blast furnace at 1200-1300 DEG C, and oxygen enrichment rate of 4-10% by volume. The blast furnace iron-making method of the present invention can effectively improve the utilization ratio and smelting intensity of the blast furnace.

The invention relates to a method for repairing a damaged cooling wall of a blast furnace and is applicable to the blast furnace ironmaking production in the metallurgical industry. The invention aims at overcoming the disadvantage that the cooling wall is completely replaced after the blast furnace is blown down for a long time in the prior art, and provides a method for boring on a ruptured cooling wall by a self-made electric drill arranged on a rack, drilling through a coiler in the cooling wall, and then connecting the coiler with a hose to pass by a ruptured part to perform a water leakage test and a pressurizing test. The cooling wall repaired by the method can achieve the cooling intensity of a normal cooling wall in operation, thus ensuring the normal production of the blast furnace.

The invention discloses a method for distributing raw materials with high zinc content in a blast furnace with a bell-less top, which comprises the following steps of: (1) controlling ore batch weight to be greater than a critical value, and ensuring that the average thickness of ore at the furnace throat is 8 to 10 percent of the diameter of the furnace throat; (2) adopting a material distribution mode from a small angle to a large angle increasingly at distributor chutes on the furnace top, and ensuring that small particle burden and powder caused by mass flow particle segregation are distributed from the center of the blast furnace to a part 1 / 3 away from the edge of the furnace wall when a material tank discharges materials; (3) selecting double-ring single pile top large-angle distribution for ore and coke gears, distributing outer-ring ore according to the maximum angle, ensuring that the ore and coke angular difference is -2 degrees and the angular difference of the inner and outer rings of the ore and the coke is 6 degrees, controlling the materials distributed in the inner ring to account for 50 to 60 percent of the total burden, making the ring number of the outer ring distribution at least two, and ensuring that the outer-ring distribution pipe top covers the inner-ring distribution pipe top; (4) adopting a positive packaging and ore-coke unequal line packaging method; and (5) regularly performing tank turning operation on tank-combined blast furnace with the bell-less top, and controlling 4 to 5 tank turning cycle periods in a material column.

The invention discloses a vanadium titanium magnetite smelting method. The smelting method is characterized in that a burden distribution system is J333313293272202 and K312293272262, wherein J represents coke, K represents mineral, the inclined angle of a burden distribution chute is divided into a sixth gear, a fifth gear, a fourth gear, a third gear, a second gear and a first gear, number superscripts represent corresponding angles, and number subscripts correspond to number of rings of corresponding gears. The smelting method is even in burden distribution, gas flow distribution is reasonable, the gas using rate is improved, the blast furnace smelting intensity is improved, and furnace wall scaffolding is prevented.

The invention discloses a charging material for blast-furnace smelting and a blast-furnace smelting method. The charging material for blast-furnace smelting comprises components in parts by weight asfollows: 60-85 parts of alkaline sintered ore, 10-20 parts of acid pellets and 0-5 parts of geological minerals, wherein alkalinity of the alkaline sintered ore is 2.2-2.3, and alkalinity of the acidpellets is 0.2-0.4; the alkaline sintered ore is prepared from 40-50 parts by weight of vanadium bearing titanomagnetite, 5-10 parts by weight of common fine iron powder, 5-15 parts by weight of boron-bearing iron ore powder, 1-5 parts by weight of SiC powder and 6-10 parts by weight of CaO as raw materials through sintering; the acid pellets are prepared from 50-60 parts by weight of the vanadiumbearing titanomagnetite, 5-10 parts by weight of common fine iron powder, 1-2 parts by weight of magnesite, 3-5 parts by weight of dolomite and 1-2 parts by weight of bentonite as raw materials through sintering. According to the blast-furnace smelting method adopting the charging material for blast-furnace smelting, liquidity of iron slag can be guaranteed, a slag charge structure is changed, slag basicity is reduced, effective availability of the charging material for blast-furnace smelting is improved, blast-furnace smelting efficiency is improved, and smelting cost is reduced.

The invention relates to a smelting assistant for steel works, namely a low-temperature pulverization inhibitor for sintered ore. The low-temperature pulverization inhibitor is prepared by mixing carboxymethyl starch, boric acid, silicon micropowder and a permeate agent in designated proportion; compared with CaCl, Cl ion drag-in quantity is reduced more than 50%, the low-temperature pulverization inhibitor can not generate a replacement reaction with K and Na alkali metals in a furnace charge, therefore, the problem of continuous and circulating enrichment of KCl (kirchhoff's circuit laws) and NaCl in a blast furnace is solved, the reactivity of coke is restrained, the melting loss reaction is reduced, the heat intensity of the coke is ensured, low temperature reduction pulverization rate of the sintered ore is reduced, the destructive effect of the alkali metal on the coke and the blast furnace is basically solved, the furnace condition is smooth, and the output is increased.

The invention belongs to the field of blast furnace smelting, and particularly relates to a method for enhancing oxygen potential of a blast furnace hearth for making iron from vanadium titano-magnetite. The technical scheme is as follows: an iron concentrate is sprayed into a blast furnace through a blast hole. Since the iron concentrate contains FeO, oxygen is introduced into the furnace hearth so as to maintain high oxygen potential in the high temperature region, thereby inhibiting the generation of Ti(CN) and other high-melting-point substances, further being beneficial to improving the blast furnace smelting process and achieving the goal of blast furnace reinforced smelting. The invention enhances the in-furnace vanadium titano-magnetite ratio, increases the utilization coefficient of the blast furnace, and lowers the iron production cost; and the invention is convenient to operate.

The blowing-in method comprises the following steps: filling furnace charge after the furnace is dried, blowing and heating nitrogen at a tuyere for preheating, then feeding hot coal gas and oxygen at the tuyere, controlling the theoretical combustion temperature at 2350-2400 DEG C, and tapping when the theoretical iron amount in a hearth reaches 60% of the normal safe iron capacity; then, the in-furnace load is gradually increased, the in-furnace reduction gas amount and oxygen amount are increased, normal tapping and in-furnace load adjustment are organized, and the theoretical combustion temperature in the stage is 2400-2500 DEG C; according to the invention, heated nitrogen is used for purging materials, quickly and effectively drying and increasing the temperature of the materials, a blast furnace gas system is inerted, heated reducing gas and high-temperature and high-reducibility gas are injected into a tuyere, enter the furnace, immediately undergo a reduction reaction with upper furnace charge, and are combusted with injected oxygen to release a large amount of heat, so that the temperature of a hearth can be quickly increased; blow-in time is shortened, and raw fuel consumption is effectively reduced.

The invention provides a control device and method for converter smelting through CO2 and argon of a rotary kiln. The control device comprises a rotary kiln part and a converter smelting part. An inner cylinder combustion chamber used for performing combustion to generate a heat source and an outer cylinder calcining compartment used for containing to-be-calcined limestone are arranged in the rotary kiln. A heat transmission wall is arranged between an inner cylinder and an outer cylinder. After carbon dioxide generated through calcination is collected through a preheater and a gas collecting pipe, dust removing, drying and pressurizing are carried out on the carbon dioxide, then the carbon dioxide enters pressure buffering tanks, and the clean carbon dioxide is obtained. The converter smelting part comprises a composite carbon dioxide and argon blowing control system mainly composed of the carbon dioxide and argon pressure buffering tanks, pressure detecting devices, flow detecting devices, temperature detecting devices, electromagnetic valves, adjusting valves and the like. During smelting, the respective electromagnetic valves and the respective adjusting valves are used for performing controlling, carbon dioxide blowing is carried out in the earlier stage and the medium stage, argon blowing is carried out in the later stage, and the electromagnetic valves and the adjusting valves can complement one another. According to the control device and method, the steelmaking production cost is reduced, the carbon emission and greenhouse effect can be reduced, and the control device and method conform to circular economy.

The invention discloses a low-cost blast furnace smelting method. The low-cost blast furnace smelting method comprises the steps that coke nut with the particle sizes ranging from 8 mm to 20 mm is added to sintered vanadium-titanium ores, small sintered vanadium-titanium ore cubes, vanadium-titanium pellets and pig iron, and an ore layer is formed through uniform mixing; and the coke and the ore layers are alternately fed into a blast furnace, so that an alternate layering structure of the ore layers and the coke layers is formed, wherein the coke is composed of high-strength coke and low-strength coke, and the high-strength coke comprises dry quenched coke. A hearth of the blast furnace comprises multiple tuyeres and two iron notches, wherein the two iron notches are symmetrical about the center axis of the hearth, the tuyeres are arranged above the iron notches and distributed circumferentially, the diameters of the tuyeres which are symmetrical about the center axis of the hearth are identical, and the diameters of the tuyeres located on the two sides of the iron notches are smaller than or equal to the diameters of the other tuyeres on the circumference. By the adoption of the low-cost blast furnace smelting method, the ventilation performance of blast furnace smelting is improved, the intensity of blast furnace smelting is improved, the fuel ratio is lowered, and the cost is lowered.

This invention discloses an energy save combustion accelerator and its manufacturing method for agglomerate, which mixes borax 45%-50% boric acid 10%-14%, NaHCO3 24%-30%, NaCl 21%-6% in the proportion of a formula to mix them evenly and put them in bags. The chemical reaction of said accelerator is carried out in the sintering process, which can further increase its smelting strength and reduce the coke ratio.

The invention discloses a sintering shaft kiln of phosphate pellets, consisting of a kiln body, a hearth, a furnace door and an annular reverberatory furnace. The invention is characterized in that the annular reverberatory furnace which surrounds the kiln body and supplies a heat energy to the upper part of an inner cavity of the shaft kiln from outside to inside is manufactured on the upper part of the kiln body; the annular reverberatory furnace consists of eight combustion furnace cavities which are uniformly built by refractory bricks; a flaming opening of the annular reverberatory furnace is arranged outside the kiln body; a combustion-supporting air pipe which supplies a channel to a combustion-supporting air path and a gas pipe which supplies a gas source to the annular reverberatory furnace for burning are arranged on an outer wall of a cavity body. As the annular reverberatory furnace is manufactured on the upper part of the shaft kiln, a tail gas which is with the temperature of 200 to 300 DGR C and is generated in a sintering production process of the pellets is recovered, and a sintering operation of powdered mineral aggregates is completed by taking the tail gas as the combustion-supporting gas of the reverberatory furnace outside the shaft kiln through the combustion-supporting air pipe, and by making full use of waste heat; thus an energy source is saved, and a pollution is reduced. The sintering shaft kiln of the phosphate pellets provides a processing device for a processing depth and a utilization level of powdered mineral resources, and reduces 20% of a coke ratio of a calcium magnesium phosphate fertilizer.

The invention provides a low-grade scrap copper cleaning and smelting new process and a device thereof. A furnace body of a bottom blowing melting furnace is a cylindrical horizontal rotary smelting furnace, and is lined with refractory bricks; one end of the top of the furnace body is a scrap copper charging port, and a flue port is formed in the other end of the furnace body; a spraying gun portis formed in the bottom of the part, below the flue port, of the furnace body; the side surface of the part, at one end of the flue port, of the furnace body is connected with a copper discharge portdevice, and a slag discharge port device is arranged on the part, at the other end of the flue port, of the furnace body. A furnace body of a bottom blowing oxidation-reduction furnace is a cylindrical horizontal rotary smelting furnace, and is lined with refractory bricks; a flue connecting port and a flue port are formed in two ends of the top of the furnace body correspondingly, and an accessory unloading port and a natural gas burner are distributed at the upper part in sequence; a matte feed port is formed in one side of the natural gas burner; a copper discharge port device and a slag discharge port device are arranged on the other side of the natural gas burner; and a spraying gun port is formed in the bottom of the furnace body. The advantages of reduction of the heat loss, high production capacity and intensity, high efficiency, high smelting strength, high utilization rate of oxygen, good labor conditions, convenience in operation, high production efficiency, good economicalbenefits, energy conservation and environmental protection are achieved.

The invention discloses an oxygen-enriched nitrogen supply system for a cupola furnace. The oxygen-enriched nitrogen supply system comprises an oxygen-enriched nitrogen preparation device and an oxygen-enriched nitrogen supply device, and is characterized in that the tower top of an adsorption tower is connected with a nitrogen output pipeline of which one end extends into a tower body of the adsorption tower and the other end is connected with a nitrogen tank; an electromagnetic valve is arranged at a position, which is close to the tower top of the adsorption tower, of the nitrogen output pipeline; the nitrogen supply device consists of a nitrogen supply pipeline of which one end is connected with the nitrogen tank and the other end is connected with a cupola furnace dust removal device, and an electromagnetic valve and a nitrogen storage bag which are arranged on the nitrogen supply pipeline close to the cupola furnace dust removal device. The oxygen-enriched nitrogen supply system for the cupola furnace has the beneficial effects that waste nitrogen in the conventional cupola furnace oxygen-enriched air supply technology is conveyed into the cupola furnace and is used as power gas for a cupola furnace dust removal system, so that the phenomenon of bag burning caused by a fact that the conventional cupola furnace dust removal system uses air is avoided, and continuous work of the cupola furnace dust removal system is realized; the expense on dust removal bags is saved by about 100,000 RMB all the year round.

The invention discloses an immersed oxygen lance continuous converting inclined metallurgical furnace capable of singly performing converting to prepare crude copper and capable of continuously performing converting and refining to prepare anode copper. A flux port is formed in the top end of a furnace body; a hot material port is formed in an end wall, far from one side of a mounting plane, of the furnace body; a cold material port is formed in the upper side, near one side of the mounting plane, of the furnace body; a slag discharge port is formed in the lower side, near one side of the mounting plane, of the furnace body; a copper discharge port is formed in an end wall, near one side of the mounting panel, of the furnace body; a flue port is formed in the top of the furnace body, and multiple oxygen lance insertion holes are formed in the bottom; 1-25 oxygen lances are provided; and gaps of the oxygen lances are 0.5-1.5 m. The immersed oxygen lance continuous converting inclined metallurgical furnace has the following advantages: the metallurgical furnace can prepare both crude copper and anode copper, and is excellent in smelting effect, high in treatment capacity, high in oxygen utilization rate, excellent in environmental protection, excellent in labor conditions, high in automation degree, safe in operation and long service life of the furnace body.

The invention relates to a blast furnace ironmaking method for high-proportion pellets. Mineral aggregates comprising an iron-containing furnace charge, coke and limestone are fed into a blast furnacefrom the top of the furnace, and the iron-containing furnace charge comprises the pellets and sintered ore, wherein the proportion of the pellets is 65 to 75%; and the mineral aggregates comprise 75to 80 parts by mass of iron-containing furnace charge, 20 to 25 parts by mass of coke and 0 to 0.5 part by mass of limestone. By adopting the method provided by the invention, the proportion of the pellets in the iron-containing furnace charge for blast furnace ironmaking can be increased to 65% to 75%, and stable operation of a blast furnace can be guaranteed; and the method has the characteristics of low production energy consumption, low waste gas emission and capability of improving economic benefits of blast furnace ironmaking.

The present invention provides an anhydrous stemming for blast furnace. Its composition includes (wt%) coarse brown corundun 1-4%, fine brown corundum 2-5%, coarse mullite 7-15%, fine mullite 9-20%, coke powder 15-20%, clay 10-19%, silicon carbide 7-11%, sericite 5-8%, bitumen 2-4% and anthracene oil 15-25%. It has good working property, stable high temperature resistance, excellent caking property, quick agglutinating property, low ton-iron stemming consumption, low contraction rate and high strength, it can raise tap up-to-standard rate to 100% from original 61.5%, can raise production safety of blast furnace, and can raise smelting strength.

The invention discloses an ultrahigh oxygen-enriched low-carbon smelting method, which is mainly characterized in that the oxygen-enriched rate is increased in the operation process of a blast furnace, the oxygen-enriched rate of the blast furnace is 40-50%, the oxygen-enriched rate of a hot blast stove part reaches 15-20%, and the oxygen enters the furnace at the temperature of 900-1000 DEG C, so that the heat brought by the enriched oxygen is increased, and the carbon consumption in the blast furnace can be effectively reduced; while high oxygen enrichment is achieved, high-reducibility coal gas and coke oven gas are blown at the tuyere, the theoretical combustion temperature of the tuyere can be adjusted, a part of high-reducibility coal gas and coke oven gas can serve as heat sources, a large amount of heat is released through combustion, and the purpose of reducing coke consumption is achieved; the condition that the upper part is cold and the lower part is hot under the high oxygen enrichment condition of a traditional blast furnace is avoided, the main component of coke oven gas is hydrogen, hydrogen replaces carbon to participate in the reduction reaction in the furnace, and the carbon reduction effect is achieved; according to the method, the operation of the blast furnace can be stabilized, the productivity is improved by 20%, and the comprehensive consumption of coke is reduced by 10-15%.

The invention discloses a vanadium titanium magnetite smelting method. The smelting method is characterized in that a burden distribution system is J333313293272202 and K312293272262, wherein J represents coke, K represents mineral, the inclined angle of a burden distribution chute is divided into a sixth gear, a fifth gear, a fourth gear, a third gear, a second gear and a first gear, number superscripts represent corresponding angles, and number subscripts correspond to number of rings of corresponding gears. The smelting method is even in burden distribution, gas flow distribution is reasonable, the gas using rate is improved, the blast furnace smelting intensity is improved, and furnace wall scaffolding is prevented.

A blast furnace ironmaking method with a high proportion of pellets. The ore material composed of iron-containing charge, coke and limestone is sent to the blast furnace from the furnace top. The iron-containing charge includes pellets and sintered ore, wherein the proportion of pellets 65-75%; the mass fraction of iron-containing charge in the ore charge is 75-80%, the mass fraction of coke is 20-25%, and the mass fraction of limestone is 0-0.5%. By adopting the method of the invention, the proportion of pellets in the iron-containing charge of the blast furnace ironmaking can be increased to 65%-75%, and the smooth operation of the blast furnace can be ensured, and the production energy consumption is low, the waste gas emission is low, and the economy of the blast furnace ironmaking can be improved. benefit features.

The invention provides a reclaimed copper smelting process and a device. The process device is composed of a smelting furnace and two parallelly arranged redox furnaces, which are in connection with two branch chutes through a main chute. The three furnaces are arranged in the shape of the Chinese character ''pin''. A furnace body consists of a feed inlet, a flue gas outlet, a copper matte outlet, a slag notch, a side wall jack on a furnace body lateral part and a spray gun jack at the furnace body bottom. The slag notch is located at the furnace body end face, the copper outlet is located on the furnace body end face at the slag notch end or the lower part of the furnace body. The furnace body is cylindrical and rotatable. The furnace body has a round cross section and its radial dimension is consistent in the axial direction of the furnace body. The spray gun is in a casing pipe form, and is inserted into the spray gun jack so as to spray oxygen and natural gas into the furnace at the same time. The included angle alpha between the opening direction of the spray gun and the vertical direction is greater than or equal to -65 degrees and smaller than or equal to +65 degrees. The process and the device involved in the invention have the advantages of high production intensity, high efficiency, short cycle, energy saving and environmental protection, and good economic benefits.