CN104372170A - Method and system for manufacturing cooled slag-making pellets from steel plant dedusting ash or steel plant sludge - Google Patents
Method and system for manufacturing cooled slag-making pellets from steel plant dedusting ash or steel plant sludge Download PDFInfo
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- CN104372170A CN104372170A CN201410543047.2A CN201410543047A CN104372170A CN 104372170 A CN104372170 A CN 104372170A CN 201410543047 A CN201410543047 A CN 201410543047A CN 104372170 A CN104372170 A CN 104372170A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/248—Binding; Briquetting ; Granulating of metal scrap or alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
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Abstract
The invention discloses a method and a system for manufacturing cooled slag-making pellets from steel plant dedusting ash or steel plant sludge. The preparation method comprises the following steps: 1), preparing the steel plant dedusting ash or the steel plant sludge; 2), in accordance with the mass ratio, weighting raw materials of 75-85% of the steel plant dedusting ash and/or the steel plant sludge, 10-20% of iron oxide scales and 2-15% of bentonite, and mixing evenly; 3), fine blending the mixture with water, and carrying out ball pressing and molding into pellets; 4), sending the prepared pellets into a closed still kettle, directly introducing steam, carrying out steam curing heating on the pellets, and allowing to generate a steam curing reaction, wherein a steam curing medium is water steam, the steam curing pressure is 0.05-1.4 MPa, the water steam temperature is 105 DEG-195 DEG C, and the steam curing time is 0.5-2 h; and 5), carrying out dust separation and screening on the product after steam curing, and thus finally obtaining the finished product. The cooled pellets are prepared by the method, so that the energy can be saved, the production equipment investment and the production cost are reduced, the production cycle is shortened, and the product quality is improved.
Description
Technical field
The invention belongs to iron and steel metallurgical industry, relate to the method for a kind of steel mill dedusting ash or steel mill's mud making cooling slag making pelletizing.
Background technology
Along with the requirement of environmental legislation is more and more tighter, the requirement of iron and steel enterprise's environmental compatibility is also improved constantly.Therefore, the technological method that some reduction energy consumptions, minimizing waste discharge and scrap concrete recycle is widelyd popularize in steel mill.Some the steel mill's scrap concrete developed in recent years, reuse technology have been succeeded application all.These technology can realize such as reducing waste discharge, save waste treatment expense, recycle the effect of part containing Fe, Zn product.Steel mill's dedusting ash and steel mill's mud, occupy important proportion in steel mill's waste, if can realize its recycling, to protecting, social environment, reduction enterprise cost are significant, it is reported, often recycle one ton of dedusting ash and can save 500 yuan.
At present, for the process of dedusting ash, normally take following technique: steel-making dedusting ash by a literary composition, two literary compositions, gravity dewatering apparatus, elbow separator, wet and revolve water trap and bring sump into by converter turbid circulating water, enter sewage disposal device again, mud is transported to pelletizing workshop after precipitation, as the raw material of coal-pressing ball, add wilkinite and binding agent, pelletizing is made after mixing, namely cooling slag making pelletizing (after referred to as cooling pelletizing) is obtained after baking, pelletizing will be cooled and send into converter high hopper, can be used as the refrigerant of converter steelmaking.
But the method equipment used quantity is a lot, also very high to the requirement of each equipment, therefore equipment cost and maintenance cost are all very high.In addition, the method needs twice dryer section just can reach finished product, dry existing steam heating and electrically heated two kinds, and steam heating is scatterer heat exchange, and thermal losses is large, and electrically heated heat conversion is low, therefore overall power consumption is high; Due to existing pelletizing manufacture craft, and drying plant restriction, general output is generally low; Rate of drying is low, and the output of drying plant, and cause output to be restricted, preparation cycle is long; Pellet quality depends primarily on pellet strength, hardness, water content and makes the ball press quality of pelletizing, existing pelletizing manufacture craft is wanted to produce qualified pelletizing, require very high to pressure ball, need high-pressure ball press to make pelletizing, this directly causes pressure ball equipment cost high, and electric power energy requires high, power consumption is large, and then under atmospheric pressure state, temperature about 150 DEG C, the time of drying that the elapsed time reaches more than 12 hours just can obtain qualified pelletizing.Although as above time consumption and energy consumption consumes equipment cost, the quality of gained pelletizing is but difficult to improve a lot, and still easily occurs the problems such as efflorescence; Simultaneously, the binding agent added in production is generally CMC tar starch polyethylene alcohol (one of binding agent that domestic market is best), minimum 5000 yuan/ton of market value, pelletizing content is not less than 2%, calculates by one ton of pelletizing, and pelletizing per ton is containing 20KG, cost 100 yuan/per ton, which thereby enhance production cost, and CMC tar starch polyethylene alcohol also has resistance to elevated temperatures difference, easily loses viscosity cause the shortcomings such as pelletizing Pulverization ratio in roasting process, affects hardness and the intensity of pelletizing.More crucially, in the pelletizing that this physical method obtains, the viscosity of binding agent also has, feed bin is located on molten steel, before also not throwing in, pelletizing is easily because there is the problem in sticky storehouse in secondary high-temperature, when causing throwing in, the injected volume control of cooling slag making pelletizing can not be accurate, not only affects the effect of cooling, more directly affect quality and the purity of molten steel.
Summary of the invention
Technical problem to be solved by this invention is to provide the method and system making cooling slag making pelletizing of steel mill's dedusting ash or steel mill's mud of a kind of energy-saving and environmental protection, good product quality, the high energy consumption existed in steel mill's dedusting ash or steel mill's mud recoverying and utilizing method for current, high equipment investment and low output, inferior quality etc. are not enough and unreasonable, after having considered the factor of each side, from material choice to device layout, all carried out design again to recycling technique to parameters of technique process etc., design content comprises:
(1) prepare in the raw material of pelletizing, do not add other any binding agent except wilkinite;
(2) remove twice drying units when preparing and producing wire system, optionally use lower-powered ball press;
(3) utilize steam-cured method and adopt suitable parameters to prepare pelletizing finished product.
The present invention realizes particular by following technical scheme:
Make a method for cooling slag making pelletizing of steel mill's dedusting ash or steel mill's mud, comprise the steps:
1), prepare steel mill's dedusting ash or steel mill's mud, by dry collection method, steel-making dedusting ash can be collected by sack cleaner when preparing steel mill's dedusting ash, be transported to pelletizing workshop, complete the preparation of steel mill's dedusting ash; When preparing steel mill's mud can with wet method collecting method by steel-making dedusting ash by a literary composition, two literary compositions, gravity dewatering apparatus, elbow separator, wet and revolve water trap and bring sump into by converter turbid circulating water, enter sewage disposal device again, after precipitation mud is transported to pelletizing workshop, completes the preparation of steel mill's mud.
2), the present invention considers the content of iron and the technique complexity of recovery needed for general cooling pelletizing finished product, finally determine according to mass ratio be steel mill's dedusting ash and/or steel mill's mud 75 ~ 85%, the ratio of iron scale 10 ~ 20%, wilkinite 2 ~ 15% takes raw material and mixes, wherein particularly, steel mill's dedusting ash and/or steel mill's mud are taken into full account, iron scale, wilkinite performance separately and the practical problems of recycling: steel mill's dedusting ash and/or steel mill's mud are as the main body recycled, its content uses more when making pelletizing, more be beneficial to the recovery of steel mill's waste material steel mill dedusting ash and steel mill's mud, be beneficial to energy-saving and emission-reduction, also the raw materials cost of finished product is made to reduce, simultaneously, iron scale is used for supplementing ferro element, price is higher, if consumption is fewer, more be beneficial to and reduce costs, when aforementioned proportion, can according to steel mill to the requirement of iron-holder of cooling pelletizing to steel mill's dedusting ash or steel mill's mud, the amount of iron scale does the selection of suitability, the present invention considers that subsequent technique is chemical process, and do not dry the problem of cracking, therefore the requirement that can suitably reduce pressure ball molding, namely the requirement to adhesive effect between raw material can also be reduced, simultaneously also for cost-saving and avoid follow-up sticky storehouse problem, contriver selects not add tackiness agent in the feed, and wilkinite uses as similar binding agent, if the amount used is fewer, the purity of pelletizing is higher, more be beneficial to the quality improving pelletizing, the present invention is based on follow-up steam curing process, simultaneously, one is the content considering that wilkinite must have in process as similar binding agent, two is for improving the purity of pelletizing and quality, after balanced, preferred bentonitic mass ratio controls to be 3 ~ 6%.
3) make pelletizing through pressure ball molding after, by said mixture finely tuning water, for the benefit of pelletizing is shaping, and as preferably, after calling in minor amount of water, in mixture, moisture content accounts for 1 ~ 20% of mixture total mass; Consider that subsequent technique is chemical process, and do not dry the problem of cracking, contriver is through test of many times, discovery suitably can reduce the requirement to pressure ball molding, thus as preferably, suitably reduces the requirement to pressure ball, namely when pressure ball molding, optionally carry out pressure ball molding with lower-powered ball press, one is greatly save equipment cost, and two is the conservation of power energy greatly; More optimizedly, adopt two lower-powered ball presses, first use one for precompressed, re-use other one for pressure ball molding.
4), send in airtight autoclave by above-mentioned obtained pelletizing, directly logical steam carries out steam-cured heating to pelletizing, makes it that steam-cured reaction occur, steam-cured medium is water vapour, steam-cured pressure is 0.05 ~ 1.4MPa, and steam temperature is 105 DEG C ~ 195 DEG C, steam-cured time 0.5 ~ 2h.Steam curing process in closed pressure vessel directly logical steam carry out steam-cured heating, than steam heat-exchanging and electrically heated utilization ratio high, carry out regulating time according to pressure, greatly can save production efficiency.Main purpose of the present invention is for consuming steel mill's dedusting ash and steel mill's mud also preparation cooling pelletizing, contriver is through the analysis to composition, determine to use steam-cured reaction when preparing pelletizing, the present invention is through test of many times, find that pressure just can start pelletizing steam-cured at more than 0.05Mpa, general pressure is larger, the steam-cured time is shorter, what the energy consumption doing a ton was converted into cost is 1/3 of process energy consumption in the past, greatly save the energy, and the top pressure steamed when oxygen still generally designs is 1.4MPa, therefore common steaming oxygen still can be used for considering and save system cost, therefore take above-mentioned steam-cured pressure 0.05 ~ 1.4MPa.
5), by above-mentioned steam-cured after product carry out dust separation screening, finally obtain finished product.
Present invention also offers a kind of system for realizing above-mentioned steel mill's dedusting ash or steel mill's mud making cooling slag making pelletizing method, comprising the dosing unit, mixing device, ball press system, autoclave system, screening plant, the blanking device that set gradually; Described dosing unit is used for raw material to enter mixing device from dosing unit; Described mixing device is used for raw material to mix, described ball press system is used for the raw material mixed to carry out pressure ball molding, then pressure ball molding gained pelletizing being sent into autoclave system carries out steam-cured, and described screening plant is used for carrying out dust screening to the pelletizing after steam-cured; Described mixing device contains priming apparatus, for finely tuning water to the material entering mixing device; For greatly saving equipment cost and electric power energy, as preferably, ball press system selects lower-powered ball press, more optimizedly, adopts two lower-powered ball presses, first uses one for precompressed, re-use other one for pressure ball molding.
Compared with the making thinking of existing cooling slag making pelletizing, the key distinction of the present invention is:
1. the starting material making pelletizing are different
Starting material of the present invention, except adding except iron scale and wilkinite in steel mill's dedusting ash or steel mill's mud, do not add other binding agents.Under existing technique, also need in starting material to add binding agent, the binding agent of interpolation is generally CMC tar starch polyethylene alcohol (one of binding agent that domestic market is best), minimum 5000 yuan/ton of market value, pelletizing content is not less than 2%, calculate by one ton of pelletizing, pelletizing per ton containing 20KG, namely thus much one just cost is improve 100 yuan/ton, and for steel mill, the demand of pelletizing is very big, long-rangely it seems, cost just improves a lot; In addition, CMC tar starch polyethylene alcohol also has resistance to elevated temperatures difference, in roasting process, easily lose viscosity causes the shortcomings such as pelletizing Pulverization ratio, affects hardness and the intensity of pelletizing, reduces the practical efficiency of pelletizing in process of cooling; More crucially, current method belongs to physical method, in the pelletizing that the method obtains, the viscosity of binding agent can not change, because the feed bin temporarily placing cooling pelletizing is located on molten steel, before also not throwing in, pelletizing is just easily because problem of viscosity generating portion pelletizing when being subject to secondary high-temperature of binding agent wherein glues the problem in storehouse, when causing throwing in, the injected volume control of cooling slag making pelletizing can not be accurate, not only affect the effect of cooling, do not reach the cooling-down effect of expectation, more because the problems such as component proportions directly affect quality and the purity of steel finished product.The present invention considers that subsequent technique is chemical process, and do not dry the problem of cracking, therefore the requirement that can suitably reduce pressure ball molding, namely the requirement to adhesive effect between raw material can also be reduced, simultaneously also for cost-saving and avoid follow-up sticky storehouse problem, contriver selects not add tackiness agent in the feed.
2. the ball press that available output is less carries out pressure ball molding
Because employing steam curing process, steam curing process is chemical process, and do not dry the problem of cracking, therefore contriver is through test of many times, discovery suitably can reduce the requirement to pressure ball molding, and so, the ball press that available output is less carries out pressure ball molding, one is reduction of equipment cost, and two are reduction of the energy consumption cost in production process.
3. by steam-cured legal system for pelletizing finished product
Steam curing process directly leads to steam and carries out steam-cured heating in closed pressure vessel, than steam heat-exchanging and electrically heated utilization ratio high, regulating time is carried out according to pressure, pressure just can start pelletizing steam-cured at more than 0.05Mpa, general pressure is larger, the steam-cured time is shorter, and what the energy consumption doing a ton was converted into cost is 1/3 of process energy consumption in the past, has greatly saved the energy.
Under enough pressure and temperatures, the steam-cured pelletizing of autoclave belongs to chemical reaction, and the pellet quality obtained is good: pellet strength can reach 65kg/cm
2above, the 15kg/cm of more existing technique
2improve a lot, after pellet strength increases, one be can greatly reduce pelletizing before being transported to feed bin on transport tape because of breaking and Dusting rate that mutually collision or difference of altitude etc. cause, greatly improve the utilization ratio of cooling pelletizing thus, two is when putting in molten steel as refrigerant, because the speed of decomposes can be relatively slow, extends its time as refrigerant, so raising cooling efficiency, the usage quantity of the required pelletizing of cooling can be reduced thus; When pelletizing is used as coolant cools molten steel, for ensureing the quality of steel finished product, pelletizing moisture content is more few better, and the pelletizing moisture that the present invention obtains is about 4%, more existing technique minimum 8% much lower, if under existing technique, the pelletizing moisture content made lower than 8% time, water content is lower, Pulverization ratio is higher, yield rate is lower, therefore method of the present invention does not also reduce yield rate obtaining low-moisture while, has good practical value; Pelletizing size of the present invention is maximum can reach 60mm, and be 1.5 times of the 40mm of existing technique, pelletizing size is larger, and one is that output is high, two is when putting in molten steel as refrigerant, and the speed of decline is fast, and the degree of depth of decline is also dark, therefore heat absorption is fast, the area of cooling is wide, and efficiency is high; Three is do not have binding agent in pelletizing, and wilkinite also without viscosity, even if the problem of the feed bin that also can not stick together through second-heating in feed bin, is easy to the injected volume of accurate controlled cooling model pelletizing through steam-cured reaction.
4, the equipment preparing the system requirements of pelletizing is few, less demanding to equipment
Preparation system required for the present invention only needs to comprise dosing unit, mixing device (containing priming apparatus), ball press system, autoclave system, screening plant, blanking device, compared with the rotary drying device of prior art, dosing unit, mixing device (containing priming apparatus), ball press system, curer system, blanking device overall device reduces a lot, and also can have substantial degradation to the requirement of ball press system, greatly reduce equipment cost and maintenance cost, the power consumption cost of equipment itself also has substantial degradation.
Compared with prior art, the invention has the beneficial effects as follows:
After the present invention has considered the factor of each side, to parameters of technique process etc., design again has all been carried out to recycling technique from material choice to device layout, adopt new composition of raw materials, in conjunction with rational mass ratio, coordinate steam curing process and rigorous parameter again, finally obtain cooling pelletizing, benefit of the present invention is: one be do that the energy consumption of a ton is converted into cost be before process energy consumption 1/3, greatly saved the energy; Two is the processes not needing twice drying, and steam-cured general pressure is larger, and the steam-cured time is shorter, substantially reduces the production cycle, shortens to 2 ~ 3 hours from 12 hours before, improves production efficiency; Three is that the pellet quality of gained is good: 1, pellet strength: 65kg/cm
2, the 15kg/cm of more existing technique
2improve a lot, after pellet strength increases, one be can greatly reduce pelletizing before being transported to feed bin on transport tape because of the breaking and Dusting rate that mutually collision or difference of altitude etc. cause, greatly improve the utilization ratio cooling pelletizing thus; 2, pelletizing moisture: about 4%, more existing technique minimum 8% much lower, and if make under existing technique moisture content lower than 8% time, water content is lower, and Pulverization ratio is higher, and yield rate is lower; 3, pelletizing size: maximumly can reach 60mm, be 1.5 times of the 40mm of existing technique, pelletizing size is larger, and one is that output is high, two is when putting in molten steel as refrigerant, and the speed of decline is fast, and the degree of depth of decline is also dark, therefore heat absorption quickly, the area of cooling is wide, and efficiency is high; Three is do not have binding agent in pelletizing, and wilkinite also without viscosity, even if the problem of the feed bin that also can not stick together through second-heating in feed bin, is easy to the injected volume of accurate controlled cooling model pelletizing through steam-cured reaction.
Produce cooling pelletizing by method of the present invention, significantly reduce production and cost of investment, serve positive effect for promoting energy-saving and emission-reduction and recycling steel mill's dedusting ash or steel mill's mud widely in China, have very high economic worth.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Embodiment 1
Make a method for cooling slag making pelletizing of steel mill's dedusting ash or steel mill's mud, comprise the steps:
1), prepare steel mill's dedusting ash or steel mill's mud, by dry collection method, steel-making dedusting ash is collected by sack cleaner, be transported to pelletizing workshop; Or with wet method collecting method by steel-making dedusting ash by a literary composition, two literary compositions, gravity dewatering apparatus, elbow separator, wet revolve water trap and bring sump into by converter turbid circulating water, then enter sewage disposal device, after precipitation mud be transported to pelletizing workshop;
2), according to mass ratio be steel mill's dedusting ash and/or steel mill's mud 75%, the ratio of iron scale 12%, wilkinite 13% takes raw material and mixes;
3) pelletizing is made through pressure ball molding after, said mixture being finely tuned water; After calling in minor amount of water, in mixture, moisture content accounts for 5% of mixture total mass; Adopt two lower-powered ball presses during pressure ball molding, first use one for precompressed, re-use other one for pressure ball molding;
4), send in airtight autoclave by above-mentioned obtained pelletizing, directly logical steam carries out steam-cured heating to pelletizing, and make it that steam-cured reaction occur, steam-cured medium is water vapour, and steam-cured pressure is 0.05MPa, and steam temperature is 105 DEG C, steam-cured time 2h;
5), by above-mentioned steam-cured after product carry out dust separation screening, finally obtain finished product.
The pellet strength of obtained cooling pelletizing is 30kg/cm to the maximum
2.
Embodiment 2
Make a method for cooling slag making pelletizing of steel mill's dedusting ash or steel mill's mud, comprise the steps:
1), prepare steel mill's dedusting ash or steel mill's mud, by dry collection method, steel-making dedusting ash is collected by sack cleaner, be transported to pelletizing workshop; Or with wet method collecting method by steel-making dedusting ash by a literary composition, two literary compositions, gravity dewatering apparatus, elbow separator, wet revolve water trap and bring sump into by converter turbid circulating water, then enter sewage disposal device, after precipitation mud be transported to pelletizing workshop;
2), according to mass ratio be steel mill's dedusting ash and/or steel mill's mud 80%, the ratio of iron scale 17%, wilkinite 3% takes raw material and mixes;
3) pelletizing is made through pressure ball molding after, said mixture being finely tuned water; After calling in minor amount of water, in mixture, moisture content accounts for 15% of mixture total mass; Adopt two lower-powered ball presses during pressure ball molding, first use one for precompressed, re-use other one for pressure ball molding;
4), send in airtight autoclave by above-mentioned obtained pelletizing, directly logical steam carries out steam-cured heating to pelletizing, and make it that steam-cured reaction occur, steam-cured medium is water vapour, and steam-cured pressure is 0.8MPa, and steam temperature is 170 DEG C, 40 minutes steam-cured time;
5), by above-mentioned steam-cured after product carry out dust separation screening, finally obtain finished product.
The pellet strength of obtained cooling pelletizing is 50kg/cm to the maximum
2.
Embodiment 3
Make a method for cooling slag making pelletizing of steel mill's dedusting ash or steel mill's mud, comprise the steps:
1), prepare steel mill's dedusting ash or steel mill's mud, by dry collection method, steel-making dedusting ash is collected by sack cleaner, be transported to pelletizing workshop; Or with wet method collecting method by steel-making dedusting ash by a literary composition, two literary compositions, gravity dewatering apparatus, elbow separator, wet revolve water trap and bring sump into by converter turbid circulating water, then enter sewage disposal device, after precipitation mud be transported to pelletizing workshop;
2), according to mass ratio be steel mill's dedusting ash and/or steel mill's mud 84%, the ratio of iron scale 10%, wilkinite 6% takes raw material and mixes;
3) pelletizing is made through pressure ball molding after, said mixture being finely tuned water; After calling in minor amount of water, in mixture, moisture content accounts for 20% of mixture total mass; Adopt two lower-powered ball presses during pressure ball molding, first use one for precompressed, re-use other one for pressure ball molding;
4), send in airtight autoclave by above-mentioned obtained pelletizing, directly logical steam carries out steam-cured heating to pelletizing, and make it that steam-cured reaction occur, steam-cured medium is water vapour, and steam-cured pressure is 1.4MPa, and steam temperature is 195 DEG C, 30 minutes steam-cured time;
5), by above-mentioned steam-cured after product carry out dust separation screening, finally obtain finished product.
The pellet strength of obtained cooling pelletizing is 65kg/cm to the maximum
2.
The above, be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any change of expecting without creative work or replacement, all should be encompassed within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should limit with claims is as the criterion.
Claims (5)
1. make a method for cooling slag making pelletizing of steel mill's dedusting ash or steel mill's mud, it is characterized in that, comprise the steps:
1), steel mill's dedusting ash or steel mill's mud is prepared;
2), according to mass ratio be steel mill's dedusting ash and/or steel mill's mud 75 ~ 85%, the ratio of iron scale 10 ~ 20%, wilkinite 2 ~ 15% takes raw material and mixes;
3) pelletizing is made through pressure ball molding after, said mixture being finely tuned water;
4), send in airtight autoclave by above-mentioned obtained pelletizing, directly logical steam carries out steam-cured heating to pelletizing, makes it that steam-cured reaction occur, steam-cured medium is water vapour, steam-cured pressure is 0.05 ~ 1.4MPa, and steam temperature is 105 DEG C ~ 195 DEG C, steam-cured time 0.5 ~ 2h;
5), by above-mentioned steam-cured after product carry out dust separation screening, finally obtain finished product.
2. the method making cooling slag making pelletizing of steel mill's dedusting ash or steel mill's mud according to claim 1, it is characterized in that, described step 1) in, prepare steel mill's dedusting ash or steel mill's mud, the method preparing steel mill's dedusting ash is: steel-making dedusting ash collected by sack cleaner by dry collection method, be transported to pelletizing workshop; The method preparing steel mill mud is: with wet method collecting method by steel-making dedusting ash by a literary composition, two literary compositions, gravity dewatering apparatus, elbow separator, wet and revolve water trap and bring sump into by converter turbid circulating water, enter sewage disposal device again, after precipitation mud is transported to pelletizing workshop.
3. the method making cooling slag making pelletizing of steel mill's dedusting ash or steel mill mud according to claim 1, is characterized in that, described step 2) described in bentonitic mass ratio be 3 ~ 6%.
4. the method making cooling slag making pelletizing of steel mill's dedusting ash or steel mill mud according to claim 1, is characterized in that, described step 3) in call in minor amount of water after in mixture moisture content account for 1 ~ 20% of mixture total mass.
5. one kind makes with steel mill's dedusting ash or steel mill's mud the system cooling slag making pelletizing method for realizing described in claim 1, it is characterized in that, comprise the dosing unit, mixing device, ball press system, autoclave system, screening plant, the blanking device that set gradually; Described dosing unit is used for raw material to enter mixing device from dosing unit; Described mixing device is used for raw material to mix, described ball press system is used for the raw material mixed to carry out pressure ball molding, then pressure ball molding gained pelletizing being sent into autoclave system carries out steam-cured, and described screening plant is used for carrying out dust screening to the pelletizing after steam-cured; Described mixing device contains priming apparatus, for finely tuning water to the material entering mixing device.
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| CN104694745A (en) * | 2015-03-06 | 2015-06-10 | 江苏永钢集团有限公司 | Preparation method of pellets for blast furnace smelting |
| CN106702154A (en) * | 2016-11-30 | 2017-05-24 | 振石集团东方特钢有限公司 | Making method of stainless steel solid waste pellet |
| CN106929625A (en) * | 2015-12-29 | 2017-07-07 | 林士凯 | The sludge that steel mill is produced is reclaimed and is made as the method that steel mill produces auxiliary material again |
| CN108103308A (en) * | 2016-11-25 | 2018-06-01 | 上海梅山钢铁股份有限公司 | A kind of device and method for steel-smelting sewage sludge pelletizing |
| CN114875236A (en) * | 2022-05-17 | 2022-08-09 | 新源县渣宝环保技术有限公司 | Method for producing high-strength pellets by using steel slag fine powder |
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| CN104694745A (en) * | 2015-03-06 | 2015-06-10 | 江苏永钢集团有限公司 | Preparation method of pellets for blast furnace smelting |
| CN106929625A (en) * | 2015-12-29 | 2017-07-07 | 林士凯 | The sludge that steel mill is produced is reclaimed and is made as the method that steel mill produces auxiliary material again |
| CN108103308A (en) * | 2016-11-25 | 2018-06-01 | 上海梅山钢铁股份有限公司 | A kind of device and method for steel-smelting sewage sludge pelletizing |
| CN108103308B (en) * | 2016-11-25 | 2019-10-18 | 上海梅山钢铁股份有限公司 | A kind of device and method for steel-smelting sewage sludge pelletizing |
| CN106702154A (en) * | 2016-11-30 | 2017-05-24 | 振石集团东方特钢有限公司 | Making method of stainless steel solid waste pellet |
| CN106702154B (en) * | 2016-11-30 | 2019-08-20 | 振石集团东方特钢有限公司 | A kind of method of stainless steel solid waste pelletizing production |
| CN114875236A (en) * | 2022-05-17 | 2022-08-09 | 新源县渣宝环保技术有限公司 | Method for producing high-strength pellets by using steel slag fine powder |
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Effective date of registration: 20191119 Address after: No. 319, Anquan village, Chengdong street, Jiangyin City, Wuxi City, Jiangsu Province Patentee after: Jiangyin Yuanfeng Environmental Protection Engineering Co., Ltd Address before: 214429, Jiangsu Province, Wuxi City, Jiangyin Province East Street, Changshan village, No. 319 Patentee before: JIANGYIN BINJIANG PORT RECYCLING MATERIALS SEPARATION STATION |