CN104649703B - Utilize the method that converter slag washing ball milling mud produces haydite - Google Patents
Utilize the method that converter slag washing ball milling mud produces haydite Download PDFInfo
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- CN104649703B CN104649703B CN201510076830.7A CN201510076830A CN104649703B CN 104649703 B CN104649703 B CN 104649703B CN 201510076830 A CN201510076830 A CN 201510076830A CN 104649703 B CN104649703 B CN 104649703B
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Abstract
The invention aims to provide a kind of production method utilizing converter slag washing ball milling mud to produce haydite, comprise the following steps: 1) weigh raw material by mass；2) claying into power mixed in grinder for raw material, then in blender, stirring and evenly mixing obtains mixed material；3) mixed material being put into pan-pelletizer, the rotation pan-pelletizer that adds water makes material globulate；4) spherical for gained raw material are entered drying system, after promoting pelletizing temperature, then dry；5) in rotary kiln, raw burn is then carried out；6) final high temperature roasting, namely obtains slag haydite after cooling.Utilizing the building-block that the method produces to have insulation, antidetonation, the performance such as freeze proof, fire-resistant, solve current slag and pile up and the problem of contaminated environment, improve the added value of steel slag utilization, meanwhile, this production method technique is simple, and energy-conserving and environment-protective are with low cost.
Description
Technical field
The invention belongs to metallurgical slag Treatment and recovery and utilize technical field, specifically refer to a kind of production method utilizing converter slag washing ball milling mud to produce haydite.
Background technology
In general, slag contains the irony resource of about 7～10%.In order to extract the iron-containing resource in slag better, improving the grade of iron-containing resource, a lot of enterprise of China takes the of a relatively high slag of PROCESS FOR TREATMENT iron-containing resource of wet method washing ball milling simultaneously.Slag washing ball milling mud be exactly take wet method rinsing ball grinding process extract metallic iron, then through the precipitate of recrement after magnetic separation.Ball milling tail mud fineness is little, easily seep water in slag washing, and saturated aqueous rate is about 30%.Owing to slag has certain gelling, therefore slag washing ball milling tail mud is difficult to dehydration, easily hardens again after drying, thus cause being difficult to transport and stack, and severe contamination production scene.How to solve washing the storing up of ball milling mud, utilize a difficult problem to become an important and urgent job.
Converter slag washes ball milling mud and the weight percent content of each component in the steel slag tailings not washing ball milling is shown in Table 1.
Table 1:
From table 1 chemical composition analysis, the P of slag washing ball milling mud2O5Decrease with iron content, but CaO, SiO2、Al2O3、SO3Increase to some extent with basicity.Steel slag tailings chemical composition that is overall and that do not wash ball milling is very nearly the same.Therefore, slag washing ball milling mud is the raw material being more suitable for doing haydite than steel slag tailings.If slag can be washed ball milling mud be used and be fabricated to haydite, the storing up of washing ball milling tail mud, difficult Utilizing question can be solved, it is achieved the doulbe-sides' victory of economic benefit and environmental benefit.
Summary of the invention
The invention aims to provide a kind of production method utilizing converter slag washing ball milling mud to produce haydite, the building-block that the method produces is utilized to have insulation, antidetonation, the performance such as freeze proof, fire-resistant, solve current slag to pile up and the problem of contaminated environment, improve the added value of steel slag utilization, simultaneously, this production method technique is simple, and energy-conserving and environment-protective are with low cost.
For achieving the above object, the converter slag washing ball milling mud that utilizes of the present invention produces the production method of haydite, comprises the following steps:
1) raw material is weighed by mass: converter slag washing 45～65 parts of ball milling mud, sintering desulfuration ash 5～25 parts, composite material 25～35 parts, extender 1～5 part；
2) raw material mix grinding in grinder is become 150～250 order powder, in blender, then stir 15～18min, mix to obtain mixed material；
3) mixed material being put into pan-pelletizer, adding water quality amount is 8～10 parts, rotates pan-pelletizer and makes material globulate, pellet diameter be 5～12mm；
4) spherical for gained raw material are entered drying system, promote pelletizing temperature to after 60～70 DEG C, then dry, drying oven temperature 125～250 DEG C, drying time 90～110min；
5) in rotary kiln, 600～700 DEG C of raw burn 40～90min are then carried out；
6) last at 1250～1450 DEG C of high-temperature roasting 20～45min, namely obtain slag haydite after cooling.
Preferably, in described converter slag washing ball milling mud, metal Ferrum content≤1%, activity index >=65%, basicity factor >=1.8, specific surface area is 300～450m2/kg。
Further, CaO weight percent content > 45% in described sintering desulfuration ash.Described sintering desulfuration ash is that in sintering plant agglomerates of sintered pellets process, sulfur removal technology garbage desulfurated plaster dries rear grinding.
Further, described composite material is the mixture of steel slag tailings powder, ground granulated blast furnace slag and manganese ground-slag, and wherein, by mass percentage, steel slag tailings powder accounts for 20～40%, ground granulated blast furnace slag accounts for 20～40%, and manganese ground-slag accounts for 20～40%.
Also further, described extender is one or several compositions in alumina powder, carbonate, powdered carbon, sodium lauryl sulphate.
More preferably, step 2) in, during described stirring, speed is 200～250r/min.
It is further preferred that step 3) in, described pan-pelletizer rotating speed 30～45r/min, angle of inclination is 45～55 °.
Adopt technical scheme provided by the invention, compared with existing known technology, there is following remarkable result:
(1) large dosage be make use of converter slag to wash ball milling mud, sintering desulfuration ash, blast-furnace cinder and the manganese slag raw material as synthesizing ceramsite by the present invention, the industrial wastes such as converter slag washing ball milling mud are recycled, and effectively reduce the production cost of heat-preserving ceramsite, make the industrial wastes such as converter slag washing ball milling mud get utilization simultaneously；
(2) the primary raw material converter slag washing ball milling mud that the present invention adopts containing the oxide of ferrum, playing the effect of flux when high-temperature roasting, it is possible to reduce sintering temperature, thus provide further relative savings the energy.
(3) present invention prepares converter slag washing ball milling mud haydite and effectively prevent the converter slag washing unordered outer row of ball milling mud and environmental pollution, destroys ecology, is conducive to Ecological Civilization Construction.
Specific embodiment
Below in conjunction with specific embodiment, the production method that converter slag washing ball milling mud produces haydite that utilizes of the present invention is set forth in further.
Embodiment one
A kind of production method utilizing converter slag washing ball milling mud to produce haydite, comprises the following steps:
1) raw material is weighed by mass: converter slag 65 parts of ball milling mud of washing, sintering desulfuration ash 5 parts, composite material 29 parts, extender 1 part；Wherein, converter slag washing ball milling mud is precipitate converter slag carrying out ball milling washing then through the recrement after magnetic separation, and its metal Ferrum content is 0.31%, and activity index is 65%, and basicity factor is 1.9, and specific surface area is 450m2/ kg, boiling process detection stability is qualified；Sintering desulfuration ash is that in sintering plant agglomerates of sintered pellets process, sulfur removal technology garbage desulfurated plaster dries rear grinding and gets, and wherein CaO weight percent content is more than 50%；Composite material is the mixture of steel slag tailings powder, ground granulated blast furnace slag and manganese ground-slag, and wherein, by mass percentage, steel slag tailings powder accounts for 33%, ground granulated blast furnace slag accounts for 33%, and manganese ground-slag accounts for 34%；Extender is alumina powder.
2) raw material mix grinding in grinder being become 150 order powder, then stir 15min in blender, mixing speed is 200r/min, mixes to obtain mixed material；
3) mixed material being put into pan-pelletizer, rotate pan-pelletizer, spraying adds water, and adding water quality is 10 parts, makes material globulate, pan-pelletizer rotating speed 45r/min, 48 ° of angle of inclination, and pellet diameter is 5mm；
4) spherical for gained raw material are entered drying system, promote pelletizing temperature to after 65 DEG C, then dry, drying oven temperature 200 DEG C, drying time 100min；
5) 650 DEG C of raw burn 45min are carried out subsequently into rotary kiln；
6) last at 1250～1450 DEG C of high-temperature roasting 25min, namely obtain slag haydite after cooling.
After obtaining the described converter slag washing clay standby heat-preserving ceramsite of ball milling, to performance indications measurements such as the bulk density of heat-preserving ceramsite, comprcssive strength and 1h water absorption rates, its bulk density is 421kg/m3, comprcssive strength is 3.6MPa, 1h water absorption rate is 3.21%, and property indices is excellent.Simultaneously as the present embodiment employs the converter slag washing ball milling mud of 65 parts so that the utilization rate of converter slag washing ball milling mud is improved such that it is able to effectively reduction haydite production cost, and the haydite function admirable produced, good heat insulating.
Embodiment two
A kind of production method utilizing converter slag washing ball milling mud to produce haydite, comprises the following steps:
1) raw material is weighed by mass: converter slag 60 parts of ball milling mud of washing, sintering desulfuration ash 5 part, part composite materials 33, extender 2 parts；Wherein, converter slag washing ball milling mud is precipitate converter slag carrying out ball milling washing then through the recrement after magnetic separation, and its metal Ferrum content is 0.45%, and activity index is 68%, and basicity factor is 2.3, and specific surface area is 400m2/ kg, boiling process detection stability is qualified；Sintering desulfuration ash is that in sintering plant agglomerates of sintered pellets process, sulfur removal technology garbage desulfurated plaster dries rear grinding and gets, and wherein CaO weight percent content is more than 45%；Composite material is the mixture of steel slag tailings powder, ground granulated blast furnace slag and manganese ground-slag, and wherein, by mass percentage, steel slag tailings powder accounts for 35%, ground granulated blast furnace slag accounts for 35%, and manganese ground-slag accounts for 30%；Extender is that alumina powder, carbonate and powdered carbon three are mixed by any ratio and form.
2) raw material mix grinding in grinder being become 200 order powder, then stir 15min in blender, mixing speed is 200r/min, mixes to obtain mixed material；
3) mixed material being put into pan-pelletizer, rotate pan-pelletizer, spraying adds water, and adding water quality is 10 parts, makes material globulate, pan-pelletizer rotating speed 35r/min, 48 ° of angle of inclination, and pellet diameter is 8mm；
4) spherical for gained raw material are entered drying system, promote pelletizing temperature to after 65 DEG C, then dry, drying oven temperature 200 DEG C, drying time 100min；
5) 650 DEG C of raw burn 90min are carried out subsequently into rotary kiln；
6) last at 1250 DEG C of high-temperature roasting 25min, namely obtain slag haydite after cooling.
After obtaining the converter slag washing clay standby heat-preserving ceramsite of ball milling, to performance indications measurements such as the bulk density of heat-preserving ceramsite, comprcssive strength and 1h water absorption rates, its bulk density is 464kg/m3, comprcssive strength is 4.3MPa, 1h water absorption rate is 1.54%, and property indices is excellent.Simultaneously as the present embodiment employs the converter slag washing ball milling mud of 60 parts so that the utilization rate of converter slag washing ball milling mud is improved such that it is able to effectively reduction haydite production cost, and the haydite function admirable produced, good heat insulating.
Embodiment three
A kind of production method utilizing converter slag washing ball milling mud to produce haydite, comprises the following steps:
1) raw material is weighed by mass: converter slag 50 parts of ball milling mud of washing, sintering desulfuration ash 15 parts, composite material 33 parts, extender 2 parts；Wherein, converter slag washing ball milling mud is precipitate converter slag carrying out ball milling washing then through the recrement after magnetic separation, and its metal Ferrum content is 0.5%, and activity index is 72%, and basicity factor is 2.1, and specific surface area is 350m2/ kg, boiling process detection stability is qualified；Sintering desulfuration ash is that in sintering plant agglomerates of sintered pellets process, sulfur removal technology garbage desulfurated plaster dries rear grinding and gets, and wherein CaO weight percent content is more than 50%；Composite material is the mixture of steel slag tailings powder, ground granulated blast furnace slag and manganese ground-slag, and wherein, by mass percentage, steel slag tailings powder accounts for 35%, ground granulated blast furnace slag accounts for 30%, and manganese ground-slag accounts for 35%；Extender is sodium lauryl sulphate.
2) raw material mix grinding in grinder being become 200 order powder, then stir 16min in blender, mixing speed is 200r/min, mixes to obtain mixed material；
3) mixed material being put into pan-pelletizer, rotate pan-pelletizer, spraying adds water, and adding water quality is 10 parts, makes material globulate, pan-pelletizer rotating speed 45r/min, 48 ° of angle of inclination, and pellet diameter is 5mm；
4) spherical for gained raw material are entered drying system, promote pelletizing temperature to after 65 DEG C, then dry, drying oven temperature 200 DEG C, drying time 100min；
5) 650 DEG C of raw burn 60min are carried out subsequently into rotary kiln；
6) last at 1320 DEG C of high-temperature roasting 25min, namely obtain slag haydite after cooling.
After obtaining the described converter slag washing clay standby heat-preserving ceramsite of ball milling, to performance indications measurements such as the bulk density of heat-preserving ceramsite, comprcssive strength and 1h water absorption rates, measuring its bulk density is 439kg/m3, comprcssive strength is 3.9MPa, 1h water absorption rate is 1.53%, and property indices is excellent.Simultaneously as the present embodiment employs the converter slag washing ball milling mud of 50 parts so that the utilization rate of converter slag washing ball milling mud is improved such that it is able to effectively reduction haydite production cost, and the haydite function admirable produced, good heat insulating.
Embodiment four
A kind of production method utilizing converter slag washing ball milling mud to produce haydite, comprises the following steps:
1) raw material is weighed by mass: converter slag washing ball milling mud 55, sintering desulfuration ash 8 parts, composite material 35 parts, extender 2 parts；Wherein, converter slag washing ball milling mud is precipitate converter slag carrying out ball milling washing then through the recrement after magnetic separation, and its metal Ferrum content is 0.3%, and activity index is 71%, and basicity factor is 2.1, and specific surface area is 400m2/ kg, boiling process detection stability is qualified；Sintering desulfuration ash is that in sintering plant agglomerates of sintered pellets process, sulfur removal technology garbage desulfurated plaster dries rear grinding and gets, and wherein CaO weight percent content is more than 45%；Composite material is the mixture of steel slag tailings powder, ground granulated blast furnace slag and manganese ground-slag, and wherein, by mass percentage, steel slag tailings powder accounts for 30%, ground granulated blast furnace slag accounts for 35%, and manganese ground-slag accounts for 35%；Extender is calcium carbonate；
2) raw material mix grinding in grinder being become 200 order powder, then stir 18min in blender, mixing speed is 200r/min, mixes to obtain mixed material；
3) mixed material being put into pan-pelletizer, rotate pan-pelletizer, spraying adds water, and adding water quality is 10 parts, makes material globulate, pan-pelletizer rotating speed 45r/min, 52 ° of angle of inclination, and pellet diameter is 8mm；
4) spherical for gained raw material are entered drying system, promote pelletizing temperature to after 65 DEG C, then dry, drying oven temperature 150 DEG C, drying time 105min；
5) 670 DEG C of raw burn 60min are carried out subsequently into rotary kiln；
6) last at 1350 DEG C of high-temperature roasting 21min, namely obtain slag haydite after cooling.
After obtaining the described converter slag washing clay standby heat-preserving ceramsite of ball milling, to performance indications measurements such as the bulk density of heat-preserving ceramsite, comprcssive strength and 1h water absorption rates, its bulk density is 514kg/m3, comprcssive strength is 4.9MPa, 1h water absorption rate is 2.48%, and property indices is excellent.In the present embodiment, the converter slag owing to employing 55 parts washes ball milling mud so that the utilization rate of converter slag washing ball milling mud is improved such that it is able to effectively reduction haydite production cost, and the haydite function admirable produced, good heat insulating.
Embodiment five
A kind of production method utilizing converter slag washing ball milling mud to produce haydite, comprises the following steps:
1) raw material is weighed by mass: converter slag 60 parts of ball milling mud of washing, sintering desulfuration ash 8 parts, composite material 30 parts, extender 2 parts；Wherein, slag washing dirt mud is precipitate converter slag carrying out ball milling washing then through the recrement after magnetic separation, and its metal Ferrum content is 0.2%, and activity index is 67%, and basicity factor is 1.9, and specific surface area is 400m2/ kg, boiling process detection stability is qualified；Sintering desulfuration ash is that in sintering plant agglomerates of sintered pellets process, sulfur removal technology garbage desulfurated plaster dries rear grinding and gets, and wherein CaO weight percent content is more than 45%；Composite material is the mixture of steel slag tailings powder, ground granulated blast furnace slag and manganese ground-slag, and wherein, by mass percentage, steel slag tailings powder accounts for 35%, ground granulated blast furnace slag accounts for 30%, and manganese ground-slag accounts for 35%；Extender is that alumina powder, calcium carbonate are by arbitrarily than the mixture of composition；
2) raw material mix grinding in grinder being become 250 order powder, then stir 15min in blender, mixing speed is 200r/min, mixes to obtain mixed material；
3) mixed material being put into pan-pelletizer, rotate pan-pelletizer, spraying adds water, and adding water quality is 10 parts, makes material globulate, pan-pelletizer rotating speed 30r/min, 45 ° of angle of inclination, and pellet diameter is 10mm；
4) spherical for gained raw material are entered drying system, promote pelletizing temperature to after 65 DEG C, then dry, drying oven temperature 150 DEG C, drying time 100min；
5) 650 DEG C of raw burn 65min are carried out subsequently into rotary kiln；
6) last at 1390 DEG C of high-temperature roasting 22min, namely obtain slag haydite after cooling.
After obtaining the described converter slag washing clay standby heat-preserving ceramsite of ball milling, to performance indications measurements such as the bulk density of heat-preserving ceramsite, comprcssive strength and 1h water absorption rates, its bulk density is 591kg/m3, comprcssive strength is 6.2MPa, 1h water absorption rate is 4.01%, and property indices is excellent.Meanwhile, the present embodiment converter slag washing ball milling mud owing to employing 60 parts so that the utilization rate of converter slag washing ball milling mud is improved such that it is able to effectively reduction haydite production cost, and the haydite function admirable produced, good heat insulating.
Claims (6)
1. one kind utilizes the production method that converter slag washing ball milling mud produces haydite, it is characterised in that it comprises the following steps:
1) raw material is weighed by mass, wherein, converter slag washing 45～65 parts of ball milling mud, sintering desulfuration ash 5～25 parts, composite material 25～35 parts, extender 1～5 part；Described composite material is the mixture of steel slag tailings powder, ground granulated blast furnace slag and manganese ground-slag, and wherein, by mass percentage, steel slag tailings powder accounts for 20～40%, ground granulated blast furnace slag accounts for 20～40%, and manganese ground-slag accounts for 20～40%；
2) raw material mix grinding in grinder is become 150～250 order powder, in blender, then stir 15～18min, mix to obtain mixed material；
3) mixed material being put into pan-pelletizer, adding water quality is 8～10 parts, rotates pan-pelletizer and makes material globulate, pellet diameter be 5～12mm；
4) spherical for gained raw material are entered drying system, promote pelletizing temperature to after 60～70 DEG C, then dry, drying oven temperature 125～250 DEG C, drying time 90～110min；
5) in rotary kiln, 600～700 DEG C of raw burn 40～90min are then carried out；
6) last at 1250～1450 DEG C of high-temperature roasting 20～45min, namely obtain slag haydite after cooling.
2. utilize converter slag washing ball milling mud to produce the production method of haydite according to claim 1, it is characterized in that: described converter slag washing its metal Ferrum content≤1% of ball milling mud, activity index >=65%, basicity factor >=1.8, specific surface area is 300～450m2/kg。
3. the production method utilizing converter slag washing ball milling mud to produce haydite according to claim 1 or claim 2, it is characterised in that: CaO weight percent content > 45% in described sintering desulfuration ash.
4. the production method utilizing converter slag washing ball milling mud to produce haydite according to claim 1 or claim 2, it is characterised in that: described extender is one or several compositions in alumina powder, carbonate, powdered carbon, sodium lauryl sulphate.
5. the production method utilizing converter slag washing ball milling mud to produce haydite according to claim 1 or claim 2, it is characterised in that: step 2) in, during described stirring, speed is 200～250r/min.
6. the production method utilizing converter slag washing ball milling mud to produce haydite according to claim 1 or claim 2, it is characterised in that: step 3) in, described pan-pelletizer rotating speed is 30～45r/min, and angle of inclination is 45～55 °.
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| CN107304126A (en) * | 2016-04-21 | 2017-10-31 | 武汉科技大学 | A kind of slag haydite |
| CN107487996A (en) * | 2016-06-12 | 2017-12-19 | 西华大学 | A kind of high-strength baking-free ceramicite of slag and preparation method thereof |
| CN106278179A (en) * | 2016-08-11 | 2017-01-04 | 武汉钢铁股份有限公司 | The resource utilization method of converter slag washing ball milling mud |
| CN106587840B (en) * | 2016-12-15 | 2018-07-10 | 武汉钢铁有限公司 | The preparation method of converter slag baking-free ceramicite |
| CN110272233A (en) * | 2018-03-13 | 2019-09-24 | 江苏德智重工有限公司 | Novel light high-strength sand base water-permeable brick |
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Effective date of registration: 20200619 Address after: 430080 Qingshan District, Hubei, Wuhan Patentee after: Baowu huanke Wuhan Metal Resources Co.,Ltd. Address before: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Patentee before: WUHAN IRON AND STEEL Co.,Ltd. |