CN105925740A - Optimization method of converter fly ash for blast furnace blowing - Google Patents
Optimization method of converter fly ash for blast furnace blowing Download PDFInfo
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- CN105925740A CN105925740A CN201610460618.5A CN201610460618A CN105925740A CN 105925740 A CN105925740 A CN 105925740A CN 201610460618 A CN201610460618 A CN 201610460618A CN 105925740 A CN105925740 A CN 105925740A
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- blast furnace
- converter dust
- removing ash
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- ash
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
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Abstract
The invention discloses an optimization method of converter fly ash for blast furnace blowing and belongs to the technical field of blast furnace iron making. According to the method, firstly, the converter fly ash is subjected experimental sample preparation, secondly, harmfulness of the converter fly ash to the blast furnace blowing is detected and analyzed through experiments, and finally, the optimal addition amount is calculated through experiments and models. The method comprises steps as follows: pretreating samples; detecting and analyzing sample harmfulness; optimizing the addition amount of the converter fly ash and analyzing the optimal addition amount. The method provides a determination thought of a complete optimal utilization scheme of the converter fly ash according to influence of the converter fly ash component and the addition amount on pulverized coal combustion in front of a tuyere, hearth temperature, slag basicity and blast furnace longevity; the method can be used for performing system analysis on different types of converter fly ash and performs scientific recommend for the addition proportion and the utilization mode, and accordingly, waste resources of a steel plant are utilized to the greatest extent on the basis of stable and smooth operation of a blast furnace.
Description
Technical field
The invention belongs to technical field of blast furnace ironmaking, be specifically related to a kind of converter dust-removing excellent for blast furnace blowing of ash
Change method.
Background technology
Converter dust-removing ash is mostly derived from the scaling loss of molten iron in convertor steelmaking process and unreacted auxiliary material (Calx
Stone and dolomite etc.) fine particle.Converter dust-removing ash has the feature of fine size, iron content, is valuable two
Secondary resource, iron and steel enterprise utilizes the scheme of converter dust-removing ash to be also on the increase.
Patent CN201410581363.9 utilizes converter dust-removing ash, sinter return fine and light dolomite powder mixing system
Standby pressure ball replaces iron ore to be used for making steel；Patent CN201410717056.9 by converter dust-removing ash with iron ore concentrate,
Prepare oxidisability pelletizing after bentonite mixing, and replace bentonite with converter dust-removing ash, improve the iron content of pellet
Grade；Patent CN201410012305.4 utilizes high pressure nitrogen to be jetted to hot-metal bottle from feed bin by converter dust-removing ash
In, reduce the purpose of molten iron temperature；Patent CN201410288329.2 is by the thick dedusting ash of steelmaking converter
It is mixed with cold bound pellet for steelmaking process with bonding agent by a certain percentage with thin dedusting ash and iron scale.
Coking wastewater biochemical water outlet is entered in contact chamber by patent CN201410677839.9 by after converter dust-removing ash slurrying
Row adsorption treatment, the precipitate after absorption is delivered to sintering plant and is blended, it is achieved the secondary of converter dust-removing ash utilizes.Specially
Profit CN201310071782.3 weighs converter dust-removing ash, flux, binding agent, blended, pelletizing and dry system
Standby converter dust-removing ash ball, and add in ladle as steel-making oxidizing dephosphorization.Patent
CN201210579653.0 will be sintered in converter dust-removing ash addition sintering feed, it is achieved industrial solid castoff
Secondary utilize.Patent CN201410147150.5 presses one by grey for secondary BOF dedusting system with discarded tundish paint
Certainty ratio is mixed with blocker, casts residual molten steel for layered shaping.
Converter dust-removing ash has iron content height, the feature of fine size, analyzes and be expected to as a kind of high from physical and chemical performance
Stove injection material directly returns blast furnace and utilizes.Therefore this patent from blast furnace blowing dedusting ash to coal dust firing, high furnace superintendent
The angle of longevity and working of a furnace impact is set out, and establishes a set of converter dust-removing ash and determines for the suitable scheme of blast furnace ejection
Method.The method contributes to expanding the secondary Land use systems of converter dust-removing ash, the solid waste to iron and steel enterprise
Thing recycles has important directive significance with energy-saving and emission-reduction.
Summary of the invention
The present invention is directed to resources characteristic and the process advantage of blast furnace blowing of converter dust-removing ash, it is provided that a kind of converter
Dedusting ash is for the optimization method of blast furnace blowing.
The present invention is by the following technical solutions:
A kind of converter dust-removing ash is for the optimization method of blast furnace blowing, and first converter dust-removing ash is carried out by described method
Prepared by laboratory sample, secondly by experiment detection analyze its to blast furnace blowing evil property, finally by testing and mould
Type calculates optimum addition, said method comprising the steps of:
Step 1, sample pretreatment；
Step 2, sample hazardness detection are analyzed；
Step 3, converter dust-removing ash optimize addition and analyze optimum addition.
Further, described step 1 is particularly as follows: be dried converter dust-removing ash 24 hours in 25 DEG C of drying bakers
Prepare air-dried basis sample, standby.
Further, described step 2 includes: granularity Detection analysis and composition detection analysis.
Further, described granularity Detection analysis includes: the sample laser particle size analyzer of preparation is detected grain
Degree distribution, checks its granularity to account for overall particle percentage ratio less than 0.074mm granule, if granularity is less than 0.074
Granule proportion is less than 60%, it is determined that is harmful, need to reduce granularity further.
Further, described composition detection analysis includes: by sample chemical analysis and the fluorimetry of preparation
Detection chemical composition content, detects the content of K, Na and S, respectively if K, Na content exceedes in dedusting ash
When 1.5% or S content is more than 0.6%, it is determined that be harmful, dedusting ash can not directly enter stove, needs to be harmful to
The removing of element processes.
Further, described step 3 includes: coal combustion rate analysis, coal dust calorimetry and blast furnace process stove
Condition is analyzed.
Further, described coal combustion rate analysis includes: by dried sample broke to 200-300 mesh grain
Level, and mix according to different adding proportions from the anthracite of identical grade, biased sample is carried out flammability
Experiment, coal dust firing experiment uses differential thermal balance to carry out, by weight-loss curve (TG) and the mistake of experimental result
Heavily rate curve (DTG) processes and obtains integrated combustion property index (SN), record different proportion mixes respectively
Grey and the anthracitic integrated combustion property index (S of converter dust-removingN), integrated combustion property index SNCharacterize mixing
The comprehensive combustion performance of sample, SNBeing worth the biggest, the combustion characteristics of biased sample is the best.
In formula: WmaxFor maximum combustion speed, (%/min)；WmeanFor average combustion rate, (%/min)；Ti
For Burn-out temperature, (DEG C)；TfFor ignition temperature, (DEG C).
Further, described coal dust calorimetry includes: by dried sample broke to 200-300 mesh grade,
And mix according to different adding proportions from the anthracite of identical grade, the mixing proportion upper limit is according to biased sample
Content of ashes determine, it is ensured that the content of ashes in sample after mixing (de-carbon, ferrum element are outer) is less than 12%.
Using automatic calorimeter to detect the high-order calorific capacity of biased sample, the height of different biased sample is analyzed in comparison
Position calorific capacity and the impact on coal dust calorific value of the converter dust-removing ash addition, as converter dust-removing ash broiler diets
Determine one of foundation.The caloric value of general warranty biased sample is not less than 26000kJ/mol.
Further, described blast furnace process working of a furnace analysis includes: by blast furnace tuyere area thermal balance model (based on
Material balance and the energy balance, set up blast furnace regional area energy quality equilibrium coupling model), calculate converter dust-removing ash
The addition affecting laws to blast furnace coke ratio, theoretical temperature combustion and basicity of slag.
The invention has the beneficial effects as follows: coal dust before air port is fired by the present invention based on converter dust-removing ash component and addition
The impact of the aspects such as burning, temperature of the furnace hearth, basicity of slag and prolonging campaign, it is proposed that the converter dust-removing of complete set
The optimization method of ash optimum utilization scheme.The present invention can carry out systematic analysis for different converter dust-removing ashes, right
Its adding proportion and Land use systems carry out the recommendation of science, it is ensured that on the basis of blast furnace stable smooth operation, to greatest extent
Utilize steel plant's waste material.Give the converter dust-removing ash optimal utilization scheme for blast furnace blowing, with
Time the method can be used for other iron content of steel plant, carbonaceous dust applies to blast furnace blowing scheme and determines.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention；
Fig. 2 is converter dust-removing ash particle size distribution figure；
Fig. 3 is the integrated combustion property index of mixed coal under different converter dust-removing ash addition.
Specific embodiments
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and enforcement
Example, is explained in further detail the present invention.Should be appreciated that specific embodiment described herein is only used
In explaining the present invention, it is not intended to limit the present invention.
On the contrary, the present invention contain any be defined by the claims do in the spirit and scope of the present invention replace
Generation, amendment, equivalent method and scheme.Further, in order to make the public that the present invention to be had a better understanding,
In hereafter the details of the present invention being described, detailed describe some specific detail sections.To people in the art
The description not having these detail sections for Yuan can also understand the present invention completely.
A kind of converter dust-removing ash, for the optimization method of blast furnace blowing, first carries out laboratory sample to converter dust-removing ash
Preparation, secondly by experiment detection analyze its to blast furnace blowing evil property, finally by experiment and model calculating
Broiler diets, said method comprising the steps of:
Step 1, sample pretreatment: converter dust-removing ash is dried in 25 DEG C of drying bakers and within 24 hours, prepares air
It is dried based specimen, standby.
Step 2, sample hazardness detection are analyzed, including: granularity Detection analysis and composition detection analysis；
Granularity Detection is analyzed: the sample laser particle size analyzer of preparation is detected particle size distribution, checks its granularity
Overall particle percentage ratio is accounted for less than 0.074mm granule, if granularity is less than 60% less than 0.074 granule proportion,
Being judged to be harmful to, need to reduce granularity further, being less than 0.074mm ratio in general blast furnace blowing thing is 60%
Above, too low if dedusting ash is less than 0.074mm ratio, it will to affect the powder process ability of pulverized coal preparation system.
Composition detection is analyzed: by sample chemical analysis and the fluorimetry detection chemical composition content of preparation,
Detect the content of K, Na and S respectively, if in dedusting ash K, Na content more than 1.5% or S content exceedes
When 0.6%, it is determined that be harmful, dedusting ash can not directly enter stove, needs the removing carrying out harmful element to process, if
K, Na content more than 1.5% or S content more than 0.6% time, it will harm life of the blast furnace, and content is the most high-risk
Evil is the biggest.
Step 3, converter dust-removing ash optimize addition and analyze optimum addition, including: coal combustion rate analysis,
Coal dust calorimetry, the blast furnace process working of a furnace are analyzed；
Coal combustion rate analyze: by dried sample broke to 200-300 mesh grade, and with identical grade
Anthracite mixes according to different adding proportions, and biased sample carries out flammability experiment, and coal dust firing is tested
Employing differential thermal balance is carried out, by weight-loss curve (TG) and weight-loss ratio curve (DTG) place of experimental result
Reason obtains integrated combustion property index (SN), the converter dust-removing ash of record different proportion mixing respectively and anthracite
Integrated combustion property index (SN).Integrated combustion property index SNCharacterize the comprehensive combustion performance of biased sample,
SNBeing worth the biggest, the combustion characteristics of biased sample is the best.
In formula: WmaxFor maximum combustion speed, (%/min)；WmeanFor average combustion rate, (%/min)；Ti
For Burn-out temperature, (DEG C)；TfFor ignition temperature, (DEG C).
Coal dust calorimetry: by dried sample broke to 200-300 mesh grade, and with the nothing of identical grade
Bituminous coal mixes according to different adding proportions, and the mixing proportion upper limit is come really according to the content of ashes of biased sample
Fixed, it is ensured that after mixing, the content of ashes in sample (de-carbon, ferrum element are outer) is less than 12%.Use automatic calorimetric
The high-order calorific capacity of biased sample is detected by instrument, and comparison is analyzed the high-order calorific capacity of different biased sample and turns
The impact on coal dust calorific value of the stove dedusting ash addition, as the determination of converter dust-removing ash broiler diets according to it
One.The caloric value of general warranty biased sample is not less than 26000kJ/mol.
The blast furnace process working of a furnace analyze: by blast furnace tuyere area thermal balance model (based on material balance and the energy balance,
Set up blast furnace regional area energy quality equilibrium coupling model), calculate converter dust-removing ash addition to blast furnace coke ratio, reason
Opinion ignition temperature and the affecting laws of basicity of slag, as the determination of converter dust-removing ash broiler diets according to it
One.
[embodiment 1]
The converter dust-removing ash of certain steel plant is carried out sample prepare, i.e. use quartering to take certain converter dust-removing
Ash, puts into thermostatic drying chamber (25 DEG C) and is dried 24 hours.
Dried sample utilizes laser particle size analyzer carry out granularity Detection, and assessment dedusting ash granularity is to blast furnace
The impact of winding-up powder process ability.Analysis result is as shown in Figure 2.The grain of converter dust-removing ash as can see from Figure 2
Degree is less than 0.007mm, and than entering, stove injection coal particle diameter (less than 0.074mm) is much smaller, therefore converter dust-removing
The interpolation of ash will not increase the cost of pulverized coal preparation system, and blast furnace is prone to accept.
Dried sample utilize chemical analysis and fluorescence analysis carry out chemical composition analysis, assessment converter dust-removing ash
Impact on the life of the blast furnace.Testing result is as shown in table 1.Typically enter the content of potassium, sodium and sulfur in stove crude fuel
It it is the emphasis paid close attention to.Potassium, sodium element, easily in blast furnace inner loop, deteriorate crude fuel high temperature metallurgical properties, with
Time potassium and sodium be easily accessible furnace wall carbon brick, destroy blast furnace, affect the life of the blast furnace.Element sulphur is taken off by slag
Except needing consumption of calorie, enter sulfur content in stove crude fuel the fewest more good.From table 1 it follows that converter
In dedusting ash, the content of potassium, sodium and element sulphur is all low than the content in feeding density charcoal and injection coal, meets blast furnace and enters
Stove requirement.Content during if potassium, sodium and sulfur content exceed stove fuel ash in converter dust-removing ash, it is not recommended that enter stove
Or reenter stove by pretreatment removing harmful element.
Table 1 converter dust-removing ash component contrasts
By dried converter dust-removing ash sample according to 1.96%, 3.85%, 5.67%, 7.41% and 9.09%
Ratio and pulverized coal injection into blast furna are mixed with biased sample.
Utilize differential thermal balance that biased sample carries out combustion experiment, obtain and mix under different converter dust-removing ash addition
TG and the DTG curve of sample combustion, calculates the overall characteristic index S of biased sample burning according to curveN。
Pass through SNThe effect to coal dust firing of the addition of assessment converter dust-removing ash, and then determine suitable addition.
Result of calculation is as shown in Figure 3.As can be seen from Figure 3 for injection coal, the adding proportion of converter dust-removing ash is
When 1.96%, flammability is best.
The aggregate sample of different dedusting ash adding proportions is carried out calorific value detection, and result is as shown in table 2.From table 2
In it can be seen that along with the interpolation of converter dust-removing ash, the calorific value of aggregate sample is gradually lowered, but when interpolation 1.96%
Time, the variable quantity of calorific value is less, can ignore.
Table 2 converter dust-removing ash component difference adding proportion adds lower injection coal calorific value
By the thermal balance of blast furnace tuyere area, calculate dedusting ash addition to blast-furnace tuyere theoretical temperature combustion, two
Unit's basicity, quaternary basicity and the affecting laws of coke ratio.Result of calculation is as shown in table 3.From table 3 it can be seen that
Along with the interpolation of converter dust-removing ash, coke ratio is continuously increased, and theoretical temperature combustion is gradually lowered, dual alkalinity and four
Unit's basicity is gradually increased.Show that being added with of converter dust-removing ash helps reduce flux addition, reduce Theoretical combustion
Temperature.Result of calculation shows when adding proportion (1.96%) that combustion rate is best, the change of blast furnace process parameter
Changing little, working of a furnace fluctuation is inconspicuous, and blast furnace is prone to accept.
Blast furnace process Parameters variation under the conditions of table 3 converter dust-removing ash difference adding proportion
Summary is researched and analysed and can be obtained, and currently to may be used for blast furnace straight for the converter dust-removing ash of certain iron and steel enterprise
Connect winding-up, and to prolonging campaign non-hazardous.Change based on Blended Coal Combustion, calorific value and blast furnace process parameter is advised
Rule, the suitable adding proportion of current converter dust-removing ash is 1.96%.
The foregoing is only the preferred embodiments of the present invention, not in order to limit the present invention, all theories in the present invention
Within principle, any modification, equivalent substitution and improvement done, should be included in protection scope of the present invention
In.
The invention has the beneficial effects as follows: coal dust before air port is fired by the present invention based on converter dust-removing ash component and addition
The impact of the aspects such as burning, temperature of the furnace hearth, basicity of slag and prolonging campaign, it is proposed that the converter dust-removing of complete set
The optimization method of ash optimum utilization scheme.The present invention can carry out systematic analysis for different converter dust-removing ashes, right
Its adding proportion and Land use systems carry out the recommendation of science, it is ensured that on the basis of blast furnace stable smooth operation, to greatest extent
Utilize steel plant's waste material.Give the converter dust-removing ash optimal utilization scheme for blast furnace blowing, with
Time the method can be used for other iron content of steel plant, carbonaceous dust applies to blast furnace blowing scheme and determines.
Claims (9)
1. a converter dust-removing ash is for the optimization method of blast furnace blowing, it is characterised in that described method is first
Converter dust-removing ash is carried out laboratory sample prepare, secondly by experiment detection analyze its to blast furnace blowing evil property,
Calculate optimum addition finally by experiment and model, said method comprising the steps of:
Step 1, sample pretreatment；
Step 2, sample hazardness detection are analyzed；
Step 3, converter dust-removing ash optimize addition and analyze optimum addition.
Converter dust-removing ash the most according to claim 1 is for the optimization method of blast furnace blowing, and its feature exists
In, described step 1 particularly as follows: converter dust-removing ash is dried in 25 DEG C of drying bakers and within 24 hours, prepares air and do
Dry based specimen, standby.
Converter dust-removing ash the most according to claim 1 is for the optimization method of blast furnace blowing, and its feature exists
In, described step 2 includes: granularity Detection analysis and composition detection analysis.
Converter dust-removing ash the most according to claim 3 is for the optimization method of blast furnace blowing, and its feature exists
In, described granularity Detection analysis includes: the sample laser particle size analyzer of preparation is detected particle size distribution, inspection
Test its granularity and account for overall particle percentage ratio less than 0.074mm granule, if granularity is less than 0.074 granule proportion
Less than 60%, it is determined that be harmful, granularity need to be reduced further.
Converter dust-removing ash the most according to claim 3 is for the optimization method of blast furnace blowing, and its feature exists
In, described composition detection analysis includes: become with fluorimetry detection chemistry by the sample chemical analysis of preparation
Point content, detects the content of K, Na and S respectively, if K, Na content is more than 1.5% or S in dedusting ash
When content is more than 0.6%, it is determined that be harmful, dedusting ash can not directly enter stove, needs to carry out the de-of harmful element
Except processing.
Converter dust-removing ash the most according to claim 1 is for the optimization method of blast furnace blowing, and its feature exists
In, described step 3 includes: coal combustion rate analysis, coal dust calorimetry and the blast furnace process working of a furnace are analyzed.
Converter dust-removing ash the most according to claim 6 is for the optimization method of blast furnace blowing, and its feature exists
In, described coal combustion rate analysis includes: by dried sample broke to 200-300 mesh grade, and with phase
Mix according to different adding proportions with the anthracite of grade, biased sample is carried out flammability experiment, coal dust
Combustion experiment uses differential thermal balance to carry out, by weight-loss curve (TG) and the weight-loss ratio curve of experimental result
(DTG) process obtains integrated combustion property index (SN), the converter dust-removing of record different proportion mixing respectively
Grey and anthracitic integrated combustion property index (SN), integrated combustion property index SNCharacterize combining of biased sample
Combination burning performance, SNBeing worth the biggest, the combustion characteristics of biased sample is the best:
In formula: WmaxFor maximum combustion speed, (%/min)；WmeanFor average combustion rate, (%/min)；Ti
For Burn-out temperature, (DEG C)；TfFor ignition temperature, (DEG C).
Converter dust-removing ash the most according to claim 6 is for the optimization method of blast furnace blowing, and its feature exists
In, described coal dust calorimetry includes: by dried sample broke to 200-300 mesh grade, and with identical
The anthracite of grade mixes according to different adding proportions, and the mixing proportion upper limit contains according to the ash of biased sample
Amount determines, it is ensured that after mixing, the content of ashes in sample (de-carbon, ferrum element are outer) is less than 12%.Use certainly
The high-order calorific capacity of biased sample is detected by momentum hot instrument, and the high-order heating of different biased sample is analyzed in comparison
Value and the impact on coal dust calorific value of the converter dust-removing ash addition, the determination as converter dust-removing ash broiler diets depends on
One of according to.
Converter dust-removing ash the most according to claim 6 is for the optimization method of blast furnace blowing, and its feature exists
In, described blast furnace process working of a furnace analysis includes: by blast furnace tuyere area thermal balance model (based on material balance and
The energy balance, sets up blast furnace regional area energy quality equilibrium coupling model), calculate converter dust-removing ash addition to height
Oven coke ratio, theoretical temperature combustion and the affecting laws of basicity of slag.
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Cited By (9)
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| CN108676945A (en) * | 2018-05-24 | 2018-10-19 | 东北大学 | A kind of volatile method of inhibition pulverized coal injection in blast furnace and metallurgical dedusting ash |
| CN108707708A (en) * | 2018-06-19 | 2018-10-26 | 东北大学 | A kind of additive and its application method improving blast furnace injection coal powder mobility |
| CN109385501A (en) * | 2018-10-29 | 2019-02-26 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A method of steel industry dedusting ash is handled using blast furnace iron runner, iron flask, mixed iron blast, converter blowing melting process |
| CN110669884A (en) * | 2019-09-29 | 2020-01-10 | 鞍钢股份有限公司 | Method for determining blast furnace coal injection blending proportion by using dry-process fly ash |
| CN110669921A (en) * | 2019-10-18 | 2020-01-10 | 甘肃酒钢集团宏兴钢铁股份有限公司 | System and method for resourcefully treating steelmaking secondary dedusting ash |
| CN114854455A (en) * | 2022-04-20 | 2022-08-05 | 北京科技大学 | Novel process for directional preparation of biomass synthesis gas and coupled co-production of blast furnace smelting |
| CN115404290A (en) * | 2022-08-18 | 2022-11-29 | 阳春新钢铁有限责任公司 | Method for economically blowing blast furnace |
| CN115820951A (en) * | 2022-07-29 | 2023-03-21 | 江苏沙钢集团有限公司 | Method for preparing blast furnace injection fuel by selectively removing combustible solid waste harmful elements |
| CN118130545A (en) * | 2024-04-30 | 2024-06-04 | 北京华能长江环保科技研究院有限公司 | Method for determining combustion characteristics of solid recovery fuel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108676945A (en) * | 2018-05-24 | 2018-10-19 | 东北大学 | A kind of volatile method of inhibition pulverized coal injection in blast furnace and metallurgical dedusting ash |
| CN108707708A (en) * | 2018-06-19 | 2018-10-26 | 东北大学 | A kind of additive and its application method improving blast furnace injection coal powder mobility |
| CN109385501A (en) * | 2018-10-29 | 2019-02-26 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A method of steel industry dedusting ash is handled using blast furnace iron runner, iron flask, mixed iron blast, converter blowing melting process |
| CN110669884A (en) * | 2019-09-29 | 2020-01-10 | 鞍钢股份有限公司 | Method for determining blast furnace coal injection blending proportion by using dry-process fly ash |
| CN110669921A (en) * | 2019-10-18 | 2020-01-10 | 甘肃酒钢集团宏兴钢铁股份有限公司 | System and method for resourcefully treating steelmaking secondary dedusting ash |
| CN110669921B (en) * | 2019-10-18 | 2023-10-27 | 甘肃酒钢集团宏兴钢铁股份有限公司 | System and method for recycling steelmaking secondary dust removal ash |
| CN114854455A (en) * | 2022-04-20 | 2022-08-05 | 北京科技大学 | Novel process for directional preparation of biomass synthesis gas and coupled co-production of blast furnace smelting |
| CN115820951A (en) * | 2022-07-29 | 2023-03-21 | 江苏沙钢集团有限公司 | Method for preparing blast furnace injection fuel by selectively removing combustible solid waste harmful elements |
| CN115404290A (en) * | 2022-08-18 | 2022-11-29 | 阳春新钢铁有限责任公司 | Method for economically blowing blast furnace |
| CN118130545A (en) * | 2024-04-30 | 2024-06-04 | 北京华能长江环保科技研究院有限公司 | Method for determining combustion characteristics of solid recovery fuel |
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