CN106636519B - The two-sided flame-insulating type heating rotary kiln of entire body and the carbon-based fertile method of production direct reduced iron coproduction - Google Patents
The two-sided flame-insulating type heating rotary kiln of entire body and the carbon-based fertile method of production direct reduced iron coproduction Download PDFInfo
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- CN106636519B CN106636519B CN201610890815.0A CN201610890815A CN106636519B CN 106636519 B CN106636519 B CN 106636519B CN 201610890815 A CN201610890815 A CN 201610890815A CN 106636519 B CN106636519 B CN 106636519B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/08—Making spongy iron or liquid steel, by direct processes in rotary furnaces
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D9/00—Other inorganic fertilisers
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Abstract
The present invention relates to the carbon-based fertile method of a kind of two-sided flame-insulating type heating rotary kiln of entire body and production direct reduced iron coproduction.The cylinder of rotary kiln that the present invention designs designs for outer barrel and inner cylinder double shell, drastic reduction room is formed between outer barrel and inner cylinder, 6~12 drastic reduction rooms are divided into by supporting clapboard, the reduced material of equivalent can be loaded in the drastic reduction room being each spaced, filling rate improves 6~12 times, and the direct reduced iron production capacity of rotary kiln also improves 6~12 times, considerably increases the production production capacity of kiln, kiln specification is also relatively reduced at the same time, the opposite investment for greatly reducing kiln.The biological materials such as the stalk in addition to coal can be used as reducing agent, solve pollution of the biological material burning to environment, turn waste into wealth, and recycle high concentration coal gas and the carbon-based fertile fertilizer co-product of co-producing bio at the same time, and energy-saving and emission-reduction carbon drop is realized, and do not produce NOx.
Description
Technical field
The invention belongs to metallurgical equipment and agricultural technology field, more particularly to the two-sided flame-insulating type heating rotary kiln of entire body and straight
Connect the carbon-based fertile method of reduced iron coproduction.
Background technology
Agricultural crop straw is a kind of excellent biomass energy, and has very big yield every year, in recent years, the annual summer harvest
When the autumn and winter, always there are the stalks such as substantial amounts of wheat, corn to be burned in field, generate a large amount of heavy smogs, not only become
The bottleneck problem of rural environmental protection, or even as the arch-criminal of urban environment is brought disaster to, agricultural crop straw faces as rural area
The new source of pollution.China can generate more than 700,000,000 tons of stalk, become " use is little " but must handle every year as large agricultural country
" discarded object " fallen.If voluntarily handled by peasant completely, just necessarily there is the phenomenon largely burned.Agricultural crop straw, sawdust,
The biomass material comprehensive exploitations such as sawdust, peanut shell, corncob, straw, wheat straw wheat bran, tree branches and leaves, radix glycyrrhizae, palm, coffee shell
Using just having great significance.
Gas cutting slag is mainly derived from steel construction and steel is used in gas cutting cutting process, the ignition temperature of cutter and ejection
High-speed cutting oxygen stream, make incision metal vigorous combustion and by after burning metal oxide blow down realize workpiece separate,
It is that iron combustion process in pure oxygen rather than fusion process produce clinker, it mainly includes：Gas welding slag, iron oxide, oxidation
Skin.
When steel forging, hot rolling hot-working and hand-drawn wire, due to the reaction of oxygen in steel and air, a large amount of oxygen can be often formed
Change iron sheet, belong to Ferrous Metallurgy solid waste, the main component of iron scale is Fe2O3、Fe3O4、FeO.The annual oxygen in the whole nation
Change about 10,000,000 tons or so of iron sheet, if handled not in time, cause to accumulate, waste of resource.If can rationally be utilized to it, add
Work can not only reduce production cost, but also can play the role of environmental protection and energy saving into water purification agent.
China is a big steel country, and nowadays iron and steel output has broken through 1,300,000,000 tons of high pointes, and production capacity is seriously superfluous.Though China
Right iron ore deposit is widely distributed, but low poor thin refractory iron ore resource distribution accounts for more than 97%, is not opened well so far
Hair and utilization, cause resources idle and waste.On the contrary, steel mill also needs to the substantial amounts of high grade iron ore of import every year, import according to
Bad degree accounts for more than the 55% of steel mill's iron ore total flow, and also has substantial amounts of iron scale every year, is only used as common
Iron Ore Powder is sintered use, does not play its exclusive speciality advantage, wastes resource.
Steel Industrial, was in a manner of the long flow steel-making greatly developed based on the steel-making of blast furnace ironmaking water in the past, and accounted for generation
The 55.8% of boundary's straight carbon steel aggregated capacity, causes excess capacity, while also result in environmental pollution, while the production capacity of excellent special steel only accounts for
The 1.9% of world's total output energy；Nowadays, country advocates with the non-burnt melting and reducing iron smelted iron based on (direct reduced iron) and short energetically
The development of flow steel-making.And the current direct reduced iron technology in China relatively lags, reduced iron annual output is less than 600,000
Ton, accounts for world's reduced iron total output less than 1%.In order to reduce straight carbon steel production capacity, excellent special steel ratio is improved, must just improve steel scrap
With the electric furnace steel making ratio based on direct reduced iron, at present, steel scrap (iron product containing reduction) is annual more than 28,000,000 tons scarce
Mouthful, therefore, annual about 10,000,000 tons of DRI, HBI product for wanting import foreign countries.As China's coking coal reserves are increasingly poor and ring
In the case of guarantor's problem getting worse, country has put into effect more related industry policy, encourages exploitation, using mill coal resource,
The non-burnt technological development such as iron-smelting process and mini-mill steelmaking such as direct reduced iron and melting and reducing iron and application are carried out, is greatly developed
The product of the excellent special steel of electric furnace, so, the yield and quality of reduced iron is improved, reduces energy consumption, reduces CO2Discharge, it is especially most
Fast exploitation China substantial amounts of low poor carefully refractory iron ore and iron-containing waste, it is an extremely urgent cause to make its recycling.
China of today, electric steel ratio is less than 15%, and the flue gas emission of the long flow steel-making mode of blast furnace-converter
Amount is more than the 80% of whole steel industry, the exhaust emissions of steel scrap (direct reduced iron DRI)+electric furnace mini-mill steelmaking mode
Amount, only accounts for the 30% of the long flow steel-making mode of blast furnace-converter.China is an Imported gas state again, development and Introduced From Abroad
Ripe gas-based reduction iron technology and equipment, since natural gas resource is deficient, does not satisfy the requirements；If Development of Coal turns gas, exist
Coal turn gas equipment investment it is big the problems such as, coal turns gas itself will also consume more than 15~20% energy, and technique at the same time
Technical sophistication, does not meet China's national situation, and therefore, environmental issue and the development that solve Steel Industrial energy-saving and emission-reduction carbon drop are short
Flow makes steel cause, just must actively develop suitable coal based ferrum redactum technology and equipment, and wall scroll production line has
The size of capacity is big, output investment ratio is low, production run cost is low, workable, energy-saving and emission-reduction etc. are advanced, the characteristics of stablizing, very
Meet the national conditions of China's reduced iron industry.
At present, the technology of China's coal based ferrum redactum industrialization comparative maturity and device mainly have：Coal base tunnel oven tank
Formula method, coal base tunnel oven tank-less method and caol based DR process, and the technique such as coal base rotary hearth furnace, coal base shaft furnace and plant investment compared with
Greatly, technology and device are still immature, it is necessary to continue perfect, are not enough to large-scale promotion.
Traditional coal base tunnel oven pot type method, can only use the high-grade iron ore of TFe >=66% or easily select iron ore, Wu Fali
High-grade reduction iron product, and technology are isolated with low thin refractory iron ore, grandidierite and iron-containing waste direct-reduction
Fall behind, cause that production capacity is low, recovery time length, floor space is wide, high energy consumption, product quality are low, product marketing is not smooth, belongs to naughty
Eliminate technique and device.
Coal base tunnel oven tank-less method, is produced although various iron ore reductions can be separated to smelting and select the high-quality reduced iron of high-grade
Product, but wall scroll production line year disposal ability highest is also less than 100,000 tons of raw ores, it is still necessary to it is further perfect.
Caol based DR process technology is gradually ripe, operating cost is relatively low, gradually promotes, but have to reduction coal
Strict requirements, it is necessary to which the particulate coal of the high-quality bituminous coal of application makees reducing agent, and the rotary kiln reduction temperature difference is very big, and operation requires severe
Carve, output investment ratio is relatively also larger, wall scroll production line year maximum production capacity also less than 300,000 tons of raw ores.
At present, country is actively promoting the environmental protection projects such as each field environmental protection project, sewage disposal, displacement also increasingly
More, it is necessary to which substantial amounts of metal iron powder carries out sewage deoxidation treatment, spent acid replacement Treatment, counterweight, pressed part and food preservative
Deng application.
It is one of main method of current sewage and water treatment to carry out sewage disposal with reduced iron powder, at home and abroad
Through there is history for many years.But since reduced iron powder complex chemical composition itself, institutional framework are fine and closely woven, cause reaction speed it is slow,
Reaction column easily blocks, is poor to high concentration wastewater treatment effect, and reduced iron powder dosage is big, and investment, operating cost are of a relatively high.
For water purification agent (direct reduced iron (hereinafter referred to as DRI)) because its specific surface area is far longer than iron filings, DRI per ton compares surface
Product is 5~100,000 times of iron filings, in recent years, is used for sewage disposal with DRI substituted metals reduced iron powder, achieves good effect
Fruit, the example of domestic and international this respect are more and more.
DRI is polished into the short grained set that metal iron powder is the iron that size is less than 1mm, can in black or silver gray
The metallurgy industries such as metallurgical, casting, and the primary raw material in the field such as powder metallurgy and chemical industry, food are widely used in, it is applied
Field is very extensive.
Carbon-based fertilizer series use high-quality crop charcoal to be formed for main feed purification.Situation of the biological material in anoxic
Under, a kind of infusibility, stablizing, height aromatization, the consolidating rich in carbon that are produced through more than 500~600 DEG C high temperature pyrolysis
State material.Crop biological carbon is rich in the carbon of 75%~95% (wt), secondly ash content, including the gold such as potassium, magnesium, calcium, silicon, manganese, zinc
The oxide of category and a small amount of volatile matter.
Charcoal base composite organic-inorganic fertilizer (compound fertilizer), refers to that biomass carbon dust is reasonable with composite organic-inorganic fertilizer (compound fertilizer)
Compatibility is so as to the environmental fertilizer formed.
Carbon-based fertilizer basic theories is clay fertilizer charcoal base organism, that is, increases the content of charcoal base-organic matter in soil, quickly change
Soil texture is made, balances salt and moisture, the soil environment for being conducive to plant health and growing is created by rapid aging, so as to increase
Soil fertility, promotes plant growth.Carbon-based fertile basic theories is visually referred to as " soil life by Agricultural University Of Nanjing professor Pan Genxing
Thing bridge technology ".
Present carbon-based fertilizer also slowly commercially circulates, and many peasant households also begin to focus on supplementing carbon, present market to soil
On mainly have：Biological organic fertilizer, biomass carbon soil conditioner, biomass carbon composite microbiological fertilizer, the bio-bacterial manure of carbon energy, liquid
The products such as state carbon fertilizer；Product category also begins to slowly variation, but final purpose is all, supplements the carbon member needed for plant
Element, improves the crumb structure of soil, improves the ability of soil water-reataining fertilizer-keeping, improves utilization rate of fertilizer.
Present market existing external heat (flame-insulating type) rotary kiln, due to having backing ring, support roller support device among kiln, adds
Also backing ring, support roller support section can only be reserved between hot stove, kiln high temperature section is disconnected, can not heated over long distances, temperature curve is in ripple
Wave-like, forms segmented external heat (flame-insulating type) rotary kiln heating furnace, therefore, kiln scale is smaller, reduction temperature are relatively low, high temperature
The temperature in area is discontinuous, unstable, can not realize that rotary kiln entire body heats over long distances, reduction kiln is short, and production capacity is low, temperature curve
Fluctuate larger, requirement of the reduced iron to reduction temperature stability can not be adapted to, chemical industry, coloured can only be used on a small scale
The less industry of the treating capacities such as noble metal, can not meet application and development in reduced iron field.
The content of the invention
The present invention is in view of the deficiency of the prior art, there is provided the two-sided flame-insulating type heating rotary kiln of a kind of entire body and straight
The carbon-based fertile method of reduced iron coproduction is connect, using metallurgical solid waste and in addition to using various coals, farming can also be used
The biological materials such as thing straw refuse are as reducing agent, using kiln body physical burden is small, filling rate is high, high-temperature region entire body is two-sided
The features such as reducing atmosphere is abundant in flame-insulating type heating (external heat), rotary kiln, realizes low temperature, depth, quick, high production capacity production is straight
Connect the carbon-based fertile fertilizer co-product of reduced iron major product coproduction.
The technical solution that the present invention solves above-mentioned technical problem is as follows：A kind of two-sided flame-insulating type heating rotary kiln of entire body, bag
Include cylinder of rotary kiln, charging gear and driving device, the driving device kiln tail driving device, kiln hood driving device, outer sleeve
Driving device, chilling roll driving device and feed drum drive, it is characterized in that, the cylinder of rotary kiln includes
Outer barrel and inner cylinder, the outer barrel include kiln tail feed zone, preheating section, high temperature section, cooling section and kiln hood discharging successively from front to back
Section；The kiln tail feed zone, preheating section, the outer barrel of high temperature section and cooling section are equipped with inner cylinder, between the outer barrel and inner cylinder
Drastic reduction room is formed, is heating chamber inside the inner cylinder；
The charging gear includes being placed in feed roller to feed roller, feed hopper, tremie pipe and smoke exhaust pipe, the smoke exhaust pipe
Interior, smoke exhaust pipe and to feed compartment is formed between feed roller, the feed hopper is connected to feed compartment by tremie pipe；The feed rolling
Cylinder front end, which is equipped with, gives feed roller seal closure, described to be covered to feed roller rear end equipped with anti-coal gas adverse current；It is described to lead to feed roller rear end
Cross material inlet and be connected to drastic reduction room；Described be externally provided with to feed roller gives feed roller backing ring, the feed drum drive
By driving charging gear to rotate to feed roller backing ring；
The inner cylinder front end of the kiln tail feed zone is connected with the rear end of the smoke exhaust pipe；The outer cylinder front end and anti-coal gas are inverse
Stream cover is externally provided with kiln tail seal closure, and the kiln tail seal closure top is equipped with gas exit；The kiln tail seal closure is externally provided with kiln tail
Backing ring, the kiln tail driving device drive kiln tail feed zone to rotate by kiln tail backing ring；
The preheating section is arranged in heating furnace for preheating body, and the high temperature section is arranged in high-temperature heating furnace body group, the cooling
Section is arranged on outside cooling heating furnace body；The high-temperature heating furnace body group includes multistage high-temperature heating furnace body；The heating furnace for preheating
Body, high-temperature heating furnace body and cooling heating furnace body are externally provided with insulation furnace shell, the heating furnace for preheating body, high-temperature heating furnace body and cold
But side is equipped with some burners in heating furnace body；
Outer barrel and inner cylinder in the heating furnace for preheating body are equipped with preheating section high-temperature flue gas import branch pipe, the preheating section
High-temperature flue gas import branch pipe connects heating furnace for preheating body and heating chamber；Outer barrel and inner cylinder in the high-temperature heater body are equipped with
High temperature section high-temperature flue gas import branch pipe, the high temperature section high-temperature flue gas import branch pipe connection high-temperature heating furnace body and heating chamber；Institute
State the outer barrel in cooling heating furnace body and inner cylinder be equipped with cooling section high-temperature flue gas import branch pipe, the cooling section high-temperature flue gas into
Mouth branch pipe connection cooling heating furnace body and heating chamber；
Outer sleeve device is equipped between the heating furnace for preheating body, high-temperature heating furnace body and cooling high-temperature furnace body；
The kiln hood discharging section is externally provided with kiln hood backing ring, and the kiln hood driving device drives kiln hood to discharge by kiln hood backing ring
Duan Xuanzhuan；The kiln hood discharging section rear end is equipped with kiln hood seal closure, and described kiln hood seal closure one end is connected to screw conveyor, separately
One end is connected to chilling roll.
Based on the above technical solutions, the present invention can also be improved as follows.
Further, the outer sleeve device includes rotary kiln outer sleeve, and the rotary kiln outer sleeve is by supporting shifting block to set
Put outside the outer barrel, high temperature flue is formed between the rotary kiln outer sleeve and outer barrel, is equipped with the outside of the outer sleeve
Fire resistant heat preserving felt；Supporting clapboard is equipped between the inner cylinder and outer barrel；The fire resistant heat preserving felt is supported by outer by connecting plate outside
Sleeve backing ring, the outer sleeve driving device drive outer sleeve device to rotate by outer sleeve backing ring；
The support shifting block includes rotation shifting block I and rotation shifting block II, the rotation shifting block I and is distributed in the outer sleeve
Surface forms " external gear ", and the rotation shifting block II is distributed on the outer barrel outer surface and forms " internal gear ", the external gear with
Internal gear is intermeshed.
Beneficial effect using above-mentioned further scheme is outer sleeve device to be set between every two sections of heating furnaces, in height
During temperature operating, longitudinal dilatation occurs for cylinder of rotary kiln, and rotation shifting block I and rotation shifting block II are intermeshed, and outer sleeve device is outside
Done under the effect of sleeve driving device together with cylinder of rotary kiln with week, synchronized operating；During cooling, cylinder of rotary kiln occurs longitudinal direction and receives
Contracting, cylinder of rotary kiln do contraction sliding and running in outer sleeve, until playback, stop rotating.So, it is ensured that every section of heating furnace
In high-temperature flue gas smoothly discharged through high temperature flue, ensure that the temperature stability of reduced material, make material reduction more
Thoroughly.By the fire resistant heat preserving felt in one layer of 200-220mm of outer sleeve peripheral hardware meter, heat-energy losses are further reduced, it is ensured that return
Rotary kiln cylinder is safe for operation, stable at high operating temperatures, reliable.
In addition, outer sleeve device to form high temperature flue between outer sleeve and outer barrel, it is ensured that between heating furnace body
There is the direct motion of high-temperature flue gas, multiple revolution outer sleeve devices and multiple heating furnace bodies is formed a complete entire body heating furnace,
It ensure that the direct motion of high-temperature flue gas so that the temperature curve of drastic reduction room is linearly, it is ensured that reducing process requirement.
Further, spray equipment is equipped with above the chilling roll, the outlet of the chilling roll passes to dry type magnetic repeatedly
Select machine；The chilling roll is externally provided with chilling roll backing ring, and the chilling roll driving device is driven by chilling roll backing ring
Chilling roll rotates.
Beneficial effect using above-mentioned further scheme is rotary kiln double shell of the invention, chilling roll, dry type magnetic separation
Machine collectively forms the drastic reduction iron system of complete set, more preferable to realize the quick reduced iron of low temperature depth.
Further, the driving device includes motor, stent, support roller and position-limited wheel, and the motor support is in the stent
On, the motor output end is equipped with support roller, is equipped with position-limited wheel on the outside of the support roller, the support roller, backing ring are engaged with position-limited wheel
Rotation.
Beneficial effect using above-mentioned further scheme is motor driving support roller rotation, drive backspin of the backing ring in support roller
Turn, position-limited wheel causes from the outside sleeve arrangement expansion in both sides when rotary kiln double shell is heated, so that the rotation of outer sleeve device
Shifting block I and rotation shifting block II are intermeshed, and then realize the same week of outer sleeve device and rotary kiln double shell, synchronized operating.
Further, the axis of the cylinder of rotary kiln and horizontal line angle are 1.5 ° -5 °, and the kiln tail feed zone is higher than kiln
Head discharging section.
Beneficial effect using above-mentioned further scheme is to be obliquely installed, and can make the solid state in cylinder of rotary kiln
Reduce iron product and material leans on the gradient of self gravitation and kiln slowly downlink, the coal gas and flue gas produced in reduction process floats
And the movement that hoists, finally collected from gas exit and high-temperature flue gas outlet discharge, realize that preheating recycles.
Further, the bent envelope of preheating section kiln wall, the bent envelope of the preheating section kiln wall and outer barrel are equipped with the heating furnace for preheating body
It is welded as a whole；The equal interior high temperature section kiln wall song that is equipped with seals in the high-temperature heater body, and the high temperature section kiln wall song seals and outer barrel
It is welded as a whole.
Beneficial effect using above-mentioned further scheme is the footpath for effectively preventing revolution outer sleeve device in High Temperature Rotating
To expansion, it is ensured that the flue gas in each heating furnace body does not leak, and ensure that kiln is rotating safe and stable, reliable.
Further, the outer barrel of the cylinder of rotary kiln, inner cylinder, preheating section high-temperature flue gas import branch pipe, high temperature section high temperature cigarette
Gas entrance branch, cooling section high-temperature flue gas import branch pipe, turn round outer sleeve device material for 310S, 330,600,
The high-quality heat-resistance stainless steel material such as 38Cr48NiW2Si2.
Beneficial effect using above-mentioned further scheme is to use heat-resisting steel cylinder so that in high temperature or cooling, cylinder
Be not in radially and longitudinally expansion or striction phenomenon, nothing can be fabricated into by efficiently solving flame-insulating type heating rotary kiln in theory
The problem of limit for length；In high temperature environments there is good thermal fatigue resistance and resistance to elevated temperatures and inoxidizability, Reusability to be not easy
Decrepitation is produced, maximum operation (service) temperature can reach more than 1150~1250 DEG C.
Further, the feed hopper is divided into iron material hopper and reducing agent hopper；The tremie pipe is divided into iron material blanking
Pipe and reducing agent tremie pipe；The iron material hopper and reducing agent hopper are respectively communicated with iron material tremie pipe and reducing agent blanking
Pipe；The iron material tremie pipe and reducing agent tremie pipe are connected to feed compartment.
Second object of the present invention is to provide a kind of straight using the two-sided flame-insulating type heating rotary kiln production of above-mentioned entire body
The carbon-based fertile method of reduced iron coproduction is connect, step is as follows：
(1) Raw material processing
Take biomass castoff to smash, the particle of ￠ 8mm × (5~10) mm is squeezed into using extruder, according to being reduced
Iron weight of material 40-50% with addition of, mixing；
(2) drastic reduction
The batch mixing of step (1) is entered to feed roller, then by material inlet from feed hopper along tremie pipe and enters drastic reduction
Room, by preheating section and high temperature section, heating furnace body is heated to 1050-1080 DEG C, 1.5~2.8h of drastic reduction by burner, is passed through
Enter kiln hood discharging section after cooling section；
(3) magnetic separation separates
Biological material particle is sent into kiln head cover, biological material particle and kiln hood discharging section by screw conveyor
Reduced material mixes, and into chilling roll, after being cooled down under spray equipment effect, reduced iron is isolated using dry-type magnetic extractor
Product and carbon-based fertilizer；
(4) the 1-20mm direct-reduction iron products that step (3) reduction magnetic separation is isolated are polishing to 0-1mm fineness, be used for
Sewage, spent acid processing；Or the 1-20mm direct-reduction iron products that step (3) reduction magnetic separation is isolated are cold-pressed into ball block, into
For metal cold pressing block MBI products；
The granularity that step (3) reduction magnetic separation is isolated is the biological material after the drying of 0-8mm, destructive distillation, screens out it
The coarse granule that middle fineness is 2-8mm is recycled as reducing agent, and the mixture that wherein fineness is 0-2mm is carbon-based fertile by-product
Product.
Wherein, the iron material being reduced described in step (1) is the iron oxide of fineness 1-20mm or fineness is 1-10mm
Gas cutting slag.
The beneficial effects of the invention are as follows：
1st, the cylinder of rotary kiln that the present invention designs designs for outer barrel and inner cylinder double shell, and depth is formed between outer barrel and inner cylinder
Room is reduced, drastic reduction room gap (thickness) is 150~300mm, and 6~12 drastic reductions are divided into by supporting clapboard
Room, the reducing material of equivalent can be loaded in the drastic reduction room being each spaced, and the normal filling rate of monotubular rotary kiln is generally
12%~15%, the filling rate of patent device improves 6~12 times, and the production capacity of rotary kiln also improves 6~12 times, increases greatly
Add the production production capacity of kiln, while also relatively reduce kiln specification, the opposite investment for greatly reducing kiln.
2nd, the present invention is equipped with smoke exhaust pipe in feed roller, and the high-temperature flue gas in smoke exhaust pipe can be pre- to reduced material
Heat, therefore the rotary kiln of the present invention substantially reduces energy consumption without using the raw material of advance high temperature sintering；Designed to feed roller rear end
Anti- coal gas adverse current cover can effectively prevent gas leak in kiln.
3rd, preheating section high-temperature flue gas import branch pipe, high temperature section high-temperature flue gas import branch pipe and the cooling section that the present invention designs are high
Warm gas inlet branch pipe, is passed through heating chamber inside inner cylinder, flue gas enters from heating chamber discharges fume by high-temperature flue gas from heating furnace body
Pipe is discharged so that the reducing material of drastic reduction chamber interior by inside and outside two-sided flame-insulating type heating, heating furnace body and heating chamber
The temperature difference is small, and drastic reduction room is fully closed, and reduction temperature only needs 1050 DEG C~1080 DEG C, belongs in various coal based ferrum redactum methods
Minimum reduction temperature, in the case of this relatively low reduction temperature, the recovery time only has 1.5~2.8h；Simultaneously as heating
Temperature is less than 1100 DEG C, therefore avoids the generation of NOx；The coal-based rotary kiln heated using flame-insulating type, rotary kiln temperature phase
To relatively low, reducing agent consumption is few, and the high-temperature tail gas of collection can be used for the drying of wet oxidation pelletizing, can be used for heating furnace combustion
Burn heating to use, save the energy, it is environmentally protective.
4th, reducing material of the invention is that two-sided external heat is carried out under isolation flame condition completely, therefore volatilizees and produce
Coal gas be high PG, can be drawn from gas exit by gas fan, through decoking, dust removal process, for coal chemical industry or from
The burning of body heating furnace uses, and the coal gas of recycling can meet the burning energy of heating furnace body 30%~60% of the present invention, accomplish energy
Source comprehensively utilizes, and reduces energy consumption, while also reduce carbon emission.
5th, thicker refractory material is not provided with the device of the invention as furnace lining, therefore kiln body gross weight can reduce 60%
~80% weight, greatly reduces kiln body physical burden, decreases the power of tiling arrangement, while reduces due to resistance to material
Accident rate caused by problem, makes kiln operating light and handy, flexible；Further, since it is the heating of entire body flame-insulating type, kiln atmosphere and temperature
Stablize, the temperature difference is small, and when operation can realize that " fool " formula operates, of less demanding to the professional standards of operative employee.
6th, the carbon-based fertile method of direct reduced iron coproduction produced using the rotary kiln of the present invention, uses the biomass such as stalk
Material solves pollution of the biological material burning to environment, realizes that low temperature, depth, quick, high yield restore as reducing agent
Direct reduced iron or reduced iron powder (metal iron powder) product, except applied to excellent Melting of Special Steels, applying also for metallurgical high-quality stove
The chemical industry deoxidation of material or sewage disposal, spent acid displacement etc., depickling, the product such as cleanser；High concentration coal gas and connection can also be recycled
The carbon-based fertile fertilizer co-product of generation, and energy-saving and emission-reduction carbon drop is realized, and do not produce NOx.
Brief description of the drawings
Fig. 1 is the longitudinal profile schematic diagram of the present invention；
Fig. 2 is the enlarged diagram of preheating section in Fig. 1；
Fig. 3 is the enlarged diagram of cooling section in Fig. 1；
Fig. 4 is A-A directions sectional schematic diagram in Fig. 1；
Fig. 5 is enlarged diagram at B in Fig. 1；
Fig. 6 is C-C directions sectional schematic diagram in Fig. 5；
Fig. 7 is D-D directions sectional schematic diagram in Fig. 1；
Fig. 8 is E-E directions sectional schematic diagram in Fig. 1；
Fig. 9 is enlarged diagram at F in Fig. 8；
Figure 10 is enlarged diagram at M in Fig. 1；
Figure 11 is enlarged diagram at N in Fig. 1；
Figure 12 is the right view of Figure 11；
In figure, 1, outer barrel；2nd, inner cylinder；3rd, kiln tail feed zone；4th, preheating section；5th, high temperature section；6th, cooling section；7th, kiln hood discharges
Section；8th, drastic reduction room；9th, heating chamber；10th, to feed roller；11st, feed hopper；12nd, tremie pipe；13rd, smoke exhaust pipe；14th, feed compartment；
15th, feed roller seal closure is given；16th, anti-coal gas adverse current is covered；17th, material inlet；18th, feed roller backing ring is given；19th, it is fed drum driven dress
Put；20th, kiln tail seal closure；21st, gas exit；22nd, kiln tail backing ring；23rd, kiln tail driving device；24th, heating furnace for preheating body；25、
It is heated at high temperature furnace body；26th, heating furnace body is cooled down；27th, furnace shell is kept the temperature；28th, burner；29th, preheating section high-temperature flue gas import branch pipe；
30th, high temperature section high-temperature flue gas import branch pipe；31st, cooling section high-temperature flue gas import branch pipe；32nd, outer sleeve device；34th, kiln hood support
Circle；35th, kiln hood driving device；36th, kiln hood seal closure；37th, screw conveyor；38th, chilling roll；39th, rotary kiln outer sleeve；
40th, high temperature flue；41st, fire resistant heat preserving felt；42nd, supporting clapboard；43rd, connecting plate；44th, outer sleeve backing ring；45th, outer sleeve drives
Dynamic device；46th, shifting block I is rotated；47th, shifting block I I are rotated；48th, spray equipment；49th, dry-type magnetic extractor；50th, chilling roll backing ring；
51st, chilling roll driving device；52nd, motor；53rd, stent；54th, support roller；55th, position-limited wheel；56th, reduced material；57th, reduced iron
Product；58th, carbon-based fertilizer；59th, the bent envelope of preheating section kiln wall；60th, the bent envelope of high temperature section kiln wall；61st, iron material hopper；62nd, reducing agent material
Bucket；63rd, iron material tremie pipe；64th, reducing agent tremie pipe.
Embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
A kind of two-sided flame-insulating type heating rotary kiln of entire body, including cylinder of rotary kiln, charging gear and driving device, the drive
Dynamic device kiln tail driving device, kiln hood driving device, outer sleeve driving device, chilling roll driving device and feed drum driven
Device, it is characterized in that, the cylinder of rotary kiln includes outer barrel 1 and inner cylinder 2, and the outer barrel includes kiln successively from front to back
Tail feed zone 3, preheating section 4, high temperature section 5, cooling section 6 and kiln hood discharging section 7；The kiln tail feed zone, preheating section, high temperature section and
The outer barrel of cooling section is equipped with inner cylinder, and drastic reduction room 8 is formed between the outer barrel and inner cylinder, is heating inside the inner cylinder
Room 9；
The charging gear includes being placed in feed roller 10, feed hopper 11, tremie pipe 12 and smoke exhaust pipe 13, the smoke exhaust pipe
To in feed roller, smoke exhaust pipe and to feed compartment 14 is formed between feed roller, the feed hopper is connected to feed compartment by tremie pipe；
The feed drum front end is equipped with to feed roller seal closure 15, described to be equipped with anti-coal gas adverse current cover 16 to feed roller rear end；It is described
Drastic reduction room is connected to by material inlet 17 to feed roller rear end；It is described to be externally provided with to feed roller to feed roller backing ring 18, institute
Feed drum drive 19 is stated by driving charging gear to rotate to feed roller backing ring；
The feed hopper 11 divides for iron material hopper 61 and reducing agent hopper 62；The tremie pipe 12 divides for iron material blanking
Pipe 63 and reducing agent tremie pipe 64；The iron material hopper and reducing agent hopper are respectively communicated with iron material tremie pipe and reducing agent
Expects pipe；The iron material tremie pipe and reducing agent tremie pipe are connected to feed compartment.
The inner cylinder front end of the kiln tail feed zone is connected with the rear end of the smoke exhaust pipe；The outer cylinder front end and anti-coal gas are inverse
Stream cover is externally provided with kiln tail seal closure 20, and the kiln tail seal closure top is equipped with gas exit 21；The kiln tail seal closure is externally provided with
Kiln tail backing ring 22, the kiln tail driving device 23 drive kiln tail feed zone to rotate by kiln tail backing ring；
The preheating section is arranged in heating furnace for preheating body 24, and the high temperature section is arranged in high-temperature heating furnace body group, described cold
But section is arranged in cooling heating furnace body 26；The high-temperature heating furnace body group includes multistage high-temperature heating furnace body 25；The preheating
Heating furnace body, high-temperature heating furnace body and cooling heating furnace body are externally provided with insulation furnace shell 27, the heating furnace for preheating body, high-temperature heating
Side is equipped with some burners 28 in furnace body and cooling heating furnace body；
Outer barrel and inner cylinder in the heating furnace for preheating body are equipped with preheating section high-temperature flue gas import branch pipe 29, the preheating
Section high-temperature flue gas import branch pipe connection heating furnace for preheating body and heating chamber；Set on outer barrel and inner cylinder in the high-temperature heater body
There are high temperature section high-temperature flue gas import branch pipe 30, the high temperature section high-temperature flue gas import branch pipe connection high-temperature heating furnace body and heating
Room；Outer barrel and inner cylinder in the cooling heating furnace body are equipped with cooling section high-temperature flue gas import branch pipe 31, and the cooling section is high
Warm gas inlet branch pipe connection cooling heating furnace body and heating chamber；
Outer sleeve device 32 is equipped between the heating furnace for preheating body, high-temperature heating furnace body and cooling heating furnace body；
The kiln hood discharging section is externally provided with kiln hood backing ring 34, and the kiln hood driving device 35 drives kiln hood by kiln hood backing ring
Discharging section rotates；The kiln hood discharging section rear end is equipped with kiln hood seal closure 36, and described kiln hood seal closure one end is connected to spiral transferring
Machine 37 is sent, the other end is connected to chilling roll 38；
The outer sleeve device includes rotary kiln outer sleeve 39, and the rotary kiln outer sleeve is by supporting shifting block to be arranged on institute
State outside outer barrel, high temperature flue 40 is formed between the rotary kiln outer sleeve and outer barrel, fire resisting is equipped with the outside of the outer sleeve
Insulation quilt 41；Supporting clapboard 42 is equipped between the inner cylinder and outer barrel；The fire resistant heat preserving felt is outer to be supported by by connecting plate 43
Outer sleeve backing ring 44, the outer sleeve driving device 45 drive outer sleeve device to rotate by outer sleeve backing ring；
The support shifting block includes rotation shifting block I46 and rotation shifting block II47, the rotation shifting block I are distributed on the overcoat
Tube inner surface forms external gear, and the rotation shifting block II is distributed on the outer barrel outer surface and forms internal gear, the external gear with
Internal gear is intermeshed；
Spray equipment 48 is equipped with above the chilling roll, the outlet of the chilling roll passes to dry-type magnetic extractor repeatedly
49；The chilling roll is externally provided with chilling roll backing ring 50, and the chilling roll driving device 51 passes through chilling roll backing ring band
Dynamic chilling roll rotation；
The driving device includes motor 52, stent 53, support roller 54 and position-limited wheel 55, and the motor support is in the stent
On, the motor output end is equipped with support roller, is equipped with position-limited wheel on the outside of the support roller, the support roller, backing ring are engaged with position-limited wheel
Rotation；
The axis of the cylinder of rotary kiln and horizontal line angle are 1.5 ° -5 °, and the kiln tail feed zone discharges higher than kiln hood
Section；
The bent envelope 59 of preheating section kiln wall is equipped with the heating furnace for preheating body, the bent envelope of the preheating section kiln wall is welded as with outer barrel
One；The bent envelope 60 of high temperature section kiln wall is equipped with the high-temperature heater body, the bent envelope of the high temperature section kiln wall is welded as one with outer barrel
Body.
It is a kind of to produce the carbon-based fertile method of direct reduced iron coproduction, step using the two-sided flame-insulating type heating rotary kiln of above-mentioned entire body
It is rapid as follows：
(1) Raw material processing
Take biomass castoff to smash, the particle of ￠ 8mm × (5~10) mm is squeezed into using extruder, according to being reduced
Iron weight of material 40-50% with addition of, mixing；
(2) drastic reduction
The batch mixing of step (1) is entered to feed roller, then by material inlet from feed hopper along tremie pipe and enters drastic reduction
Room, by preheating section and high temperature section, heating furnace body is heated to 1050-1080 DEG C, 1.5~2.8h of drastic reduction by burner, is passed through
Enter kiln hood discharging section after cooling section；
(3) magnetic separation separates
Biological material particle is sent into kiln head cover, biological material particle and kiln hood discharging section by screw conveyor
Reduced material mixes, and into chilling roll, after being cooled down under spray equipment effect, reduced iron is isolated using dry-type magnetic extractor
Product and carbon-based fertilizer；
(4) the 1-20mm direct-reduction iron products that step (3) reduction magnetic separation is isolated are polishing to 0-1mm fineness, be used for
Sewage, spent acid processing；Or the 1-20mm direct-reduction iron products that step (3) reduction magnetic separation is isolated are cold-pressed into ball block, into
For metal cold pressing block MBI products；
The granularity that step (3) reduction magnetic separation is isolated is the biological material after the drying of 0-8mm, destructive distillation, screens out it
The coarse granule that middle fineness is 2-8mm is recycled as reducing agent, and the mixture that wherein fineness is 0-2mm is carbon-based fertile by-product
Product.
The index of the reduced material used in the embodiment of the present invention is shown in Table 1, the index of biomass carbon and carbon-based fertile material
It is shown in Table 2.
Table 1
| Title | Fe% | S | P | Moisture content % | Fineness |
| Iron scale | ≥72.0 | 0.06 | 0.04 | 10 | 2~20mm |
| Hot candied iron scale | ≥72.0 | 0.06 | 0.04 | 4.5 | 2~5mm |
| Gas cutting slag | ≥73.0 | 0.06 | 0.04 | 2.0 | 5~20mm |
Table 2
Embodiment 1
By iron scale weight with addition of 45% particle crossed of biomass carbonization, grain graininess ￠ 8mm × 6mm, incite somebody to action the two
Mixing adds flame-insulating type rotary kiln, the reductase 12 .5h at a temperature of 1080 DEG C, after cooling section discharges, using biological material
Grain covering protection, is cooled to 150 DEG C by chilling roll, the direct-reduction iron product of 1-20mm is isolated using dry type magnetic separation,
0-1mm fineness is polished into again, is high-quality chemical industry metal iron powder, water purification agent or reduced iron powder product；Take dry type magnetic separation point
The granularity separated out is the biomass carbon material after the drying of 0-8mm, destructive distillation, screens out the coarse granule that wherein fineness is 2-8mm, makees
Recycled for reducing agent, the mixture that the fineness under sieving is 0-2mm is carbon-based fertile byproduct.
Product index is as follows：
1) iron product is reduced
2) carbon-based fertilizer
Embodiment 2
By hot candied iron scale weight with addition of 50% biomass carbon particle (after straw extrusion drying), grain graininess ￠
8mm × 8mm, by the two addition flame-insulating type rotary kiln, the reductase 12 .6h at a temperature of 1050 DEG C, after cooling section discharges, uses
Biological material particle covering protection, 150 DEG C are cooled to by chilling roll；Take that the 1-20mm's that dry type magnetic separation isolates is direct
Iron product is reduced, is cold-pressed balling-up block, is metal cold pressing block (MBI) production as the reduction iron product for smelting high-quality special steel
Product；It is the biomass carbon material after the drying of 0-8mm, destructive distillation to take the granularity that dry type magnetic separation is isolated, and it is 2-8mm to screen out fineness
Coarse granule, as reducing agent recycle, the mixture that fineness sieve under is 0-2mm be it is carbon-based fertilizer byproduct.
Product index is as follows：
1) iron product is reduced
2) carbon-based fertilizer
Embodiment 3
By gas cutting slag cracking and sorting 2~10mm particles, by gas cutting slag weight with addition of 48% carbonization biomass carbon particle,
Grain graininess ￠ 6.5mm × 7mm, by the two addition flame-insulating type rotary kiln, the reductase 12 .8h at a temperature of 1070 DEG C, by cooling section
After discharging, using biological material particle covering protection, 180 DEG C are cooled to by chilling roll；Take what dry type magnetic separation was isolated
The direct-reduction iron product of 1-20mm, is polished into 0-1mm fineness, is high-quality chemical industry metal iron powder, water purification agent or reduction
Iron powder product；It is the biomass carbon material after the drying of 0-8mm, destructive distillation to take the granularity that dry type magnetic separation is isolated, and screens out fineness
For the coarse granule of 2-8mm, recycled as reducing agent, the mixture that the fineness under sieving is 0-2mm is carbon-based fertile byproduct.
Product index is as follows：
1) iron product is reduced
2) carbon-based fertilizer
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of two-sided flame-insulating type heating rotary kiln of entire body, including cylinder of rotary kiln, charging gear and driving device, the driving
Device includes kiln tail driving device, kiln hood driving device, outer sleeve driving device, chilling roll driving device and is driven to feed roller
Dynamic device, it is characterised in that the cylinder of rotary kiln includes outer barrel and inner cylinder, the outer barrel from front to back successively including kiln tail into
Expect section, preheating section, high temperature section, cooling section and kiln hood discharging section；The kiln tail feed zone, preheating section, high temperature section and cooling section
Outer barrel is equipped with inner cylinder, and drastic reduction room is formed between the outer barrel and inner cylinder, is heating chamber inside the inner cylinder；
The charging gear is included to feed roller, feed hopper, tremie pipe and smoke exhaust pipe, and the smoke exhaust pipe is placed in in feed roller,
Smoke exhaust pipe and to feed compartment is formed between feed roller, the feed hopper is connected to feed compartment by tremie pipe；It is described to give feed roller
Front end, which is equipped with, gives feed roller seal closure, described to be equipped with anti-coal gas adverse current cover to feed roller rear end；It is described to pass through to feed roller rear end
Material inlet is connected to drastic reduction room；Described be externally provided with to feed roller gives feed roller backing ring, and the feed drum drive leads to
Cross and drive charging gear rotation to feed roller backing ring；
The inner cylinder front end of the kiln tail feed zone is connected with the rear end of the smoke exhaust pipe；The outer cylinder front end and anti-coal gas adverse current are covered
Kiln tail seal closure is externally provided with, the kiln tail seal closure top is equipped with gas exit；The kiln tail seal closure is externally provided with kiln tail backing ring,
The kiln tail driving device drives kiln tail feed zone to rotate by kiln tail backing ring；
The preheating section is arranged in heating furnace for preheating body, and the high temperature section is arranged in high-temperature heating furnace body group, and the cooling section is set
In outside cooling heating furnace body；The high-temperature heating furnace body group includes multistage high-temperature heating furnace body；The heating furnace for preheating body, height
Warm heating furnace body and cooling heating furnace body are externally provided with insulation furnace shell, and the heating furnace for preheating body, high-temperature heating furnace body and cooling add
Side is equipped with some burners in hot stove body；
Outer barrel and inner cylinder in the heating furnace for preheating body are equipped with preheating section high-temperature flue gas import branch pipe, the preheating section high temperature
Gas inlet branch pipe connects heating furnace for preheating body and heating chamber；Outer barrel and inner cylinder in the high-temperature heater body are equipped with high temperature
Section high-temperature flue gas import branch pipe, the high temperature section high-temperature flue gas import branch pipe connection high-temperature heating furnace body and heating chamber；It is described cold
But the outer barrel in heating furnace body and inner cylinder are equipped with cooling section high-temperature flue gas import branch pipe, the cooling section high-temperature flue gas import branch
Pipe connection cooling heating furnace body and heating chamber；
Outer sleeve device is equipped between the heating furnace for preheating body, high-temperature heating furnace body and cooling high-temperature furnace body；
The kiln hood discharging section is externally provided with kiln hood backing ring, and the kiln hood driving device drives kiln hood discharging section to revolve by kiln hood backing ring
Turn；The kiln hood discharging section rear end is equipped with kiln hood seal closure, and described kiln hood seal closure one end is connected to screw conveyor, the other end
It is connected to chilling roll.
2. the two-sided flame-insulating type heating rotary kiln of entire body according to claim 1, it is characterised in that the outer sleeve device bag
Rotary kiln outer sleeve is included, the rotary kiln outer sleeve is by supporting shifting block to be arranged on outside the outer barrel, the rotary kiln outer sleeve
High temperature flue is formed between outer barrel, fire resistant heat preserving felt is equipped with the outside of the outer sleeve；Set between the inner cylinder and outer barrel
There is supporting clapboard；The fire resistant heat preserving felt is outer to be supported by outer sleeve backing ring by connecting plate, and the outer sleeve driving device passes through
Outer sleeve backing ring drives the rotation of outer sleeve device；
The support shifting block includes rotation shifting block I and rotation shifting block I I, the rotation shifting block I are distributed on table in the outer sleeve
Face forms " external gear ", and the rotation shifting block I I are distributed on outer barrel outer surface formation " internal gear ", the external gear and interior
Gear is intermeshed.
3. the two-sided flame-insulating type heating rotary kiln of entire body according to claim 1, it is characterised in that above the chilling roll
Equipped with spray equipment, the outlet of the chilling roll passes to dry-type magnetic extractor repeatedly；The chilling roll is externally provided with chilling roll
Backing ring, the chilling roll driving device drive chilling roll to rotate by chilling roll backing ring.
4. the two-sided flame-insulating type heating rotary kiln of entire body according to claim 1, it is characterised in that the driving device includes
Motor, stent, support roller and position-limited wheel, on the bracket, the motor output end is equipped with support roller, the support to the motor support
Wheel outside is equipped with position-limited wheel, and the support roller, backing ring are engaged rotation with position-limited wheel.
5. the two-sided flame-insulating type heating rotary kiln of entire body according to claim 1, it is characterised in that the cylinder of rotary kiln
Axis and horizontal line angle are 1.5 ° -5 °, and the kiln tail feed zone is higher than kiln hood discharging section.
6. the two-sided flame-insulating type heating rotary kiln of entire body according to claim 1, it is characterised in that the feed hopper is divided into iron
Raw material hopper and reducing agent hopper；The tremie pipe is divided into iron material tremie pipe and reducing agent tremie pipe；The iron material hopper
Iron material tremie pipe and reducing agent tremie pipe are respectively communicated with reducing agent hopper；The iron material tremie pipe and reducing agent tremie pipe
It is connected to feed compartment.
7. one kind utilizes the carbon-based fertile method of the two-sided flame-insulating type heating rotary kiln direct reduced iron coproduction of entire body described in claim 1,
It is characterized in that, step is as follows：
(1) Raw material processing
Take biomass castoff to smash, the particle of ￠ 8mm × (5~10) mm is squeezed into using extruder, according to the iron being reduced
Weight of material 40-50% is with addition of mixing；
(2) drastic reduction
The batch mixing of step (1) is entered to feed roller, then by material inlet from feed hopper along tremie pipe and enters drastic reduction room, is passed through
Preheating section and high temperature section are crossed, heating furnace body is heated to 1050-1080 DEG C by burner, 1.5~2.8h of drastic reduction, by cooling section
Enter kiln hood discharging section afterwards；
(3) magnetic separation separates
Biological material particle is sent into kiln head cover by screw conveyor, biological material particle is gone back with kiln hood discharging section
Raw material mixes, and into chilling roll, after being cooled down under spray equipment effect, reduction iron product is isolated using dry-type magnetic extractor
With carbon-based fertilizer；
(4) the 1-20mm direct-reduction iron products that step (3) reduction magnetic separation is isolated are polishing to 0 ＜ fineness≤1mm, for dirt
Water, spent acid processing；Or the 1-20mm direct-reduction iron products that step (3) reduction magnetic separation is isolated are cold-pressed into ball block, become
Metal cold pressing block MB I products；
Step (3) reduces the biological material after the drying for 0 ＜ granularities≤8mm that magnetic separation is isolated, destructive distillation, screens out wherein thin
Spend and recycled for the coarse granule of 2-8mm as reducing agent, wherein the mixture of 0 ＜ fineness≤2mm is carbon-based fertile byproduct.
8. the method according to the description of claim 7 is characterized in that the iron material being reduced described in step (1) is fineness
The iron oxide or fineness of 1-20mm is the gas cutting slag of 1-10mm.
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| CN108559815B (en) * | 2018-07-09 | 2024-06-21 | 赵威 | Device and method for producing direct reduced iron by using biological straw |
| CN110229939B (en) * | 2019-07-15 | 2024-05-07 | 陶立群 | Two-section rotary kiln non-coke iron-making device |
| CN110514021A (en) * | 2019-09-04 | 2019-11-29 | 营口仁和昌顺耐火材料有限公司 | A kind of rotation dynamic sinter system |
| CN110514001A (en) * | 2019-09-20 | 2019-11-29 | 营口仁和昌顺耐火材料有限公司 | A kind of parallel overlapping dynamic pre-heating drying calcination system |
| CN112592219A (en) * | 2020-12-28 | 2021-04-02 | 华中科技大学 | Aerobic composting system |
| CN113188327A (en) * | 2021-04-08 | 2021-07-30 | 朝阳重型机器制造有限公司 | Rotary kiln |
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| JP3820677B2 (en) * | 1997-05-30 | 2006-09-13 | 住友金属工業株式会社 | Method and apparatus for charging reduced iron production raw material |
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| CN103757168A (en) * | 2013-12-31 | 2014-04-30 | 李苏翔 | Iron making rotary kiln and iron making technology |
| CN104357611A (en) * | 2014-09-29 | 2015-02-18 | 石家庄新华能源环保科技股份有限公司 | Method and device for reduction ironmaking by dividing wall rotary kiln |
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