CN111298908A - 一种钢渣、锂渣、炉渣、石粉混合粉磨生产工艺 - Google Patents
一种钢渣、锂渣、炉渣、石粉混合粉磨生产工艺 Download PDFInfo
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- 239000002893 slag Substances 0.000 title claims abstract description 167
- 239000000843 powder Substances 0.000 title claims abstract description 64
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 57
- 239000010959 steel Substances 0.000 title claims abstract description 57
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 52
- 239000004575 stone Substances 0.000 title claims abstract description 47
- 238000000227 grinding Methods 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000002156 mixing Methods 0.000 title claims description 9
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000002994 raw material Substances 0.000 claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 19
- 239000011812 mixed powder Substances 0.000 claims abstract description 11
- 238000005303 weighing Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000005507 spraying Methods 0.000 claims description 8
- 238000003860 storage Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 2
- 238000000498 ball milling Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 3
- 239000002956 ash Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 229910052642 spodumene Inorganic materials 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/1805—Monitoring devices for tumbling mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/1815—Cooling or heating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
- B02C17/186—Adding fluid, other than for crushing by fluid energy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0481—Other specific industrial waste materials not provided for elsewhere in C04B18/00
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
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- C—CHEMISTRY; METALLURGY
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- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/144—Slags from the production of specific metals other than iron or of specific alloys, e.g. ferrochrome slags
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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Abstract
本发明涉及一种钢渣、锂渣、炉渣、石粉烘干及粉磨生产工艺,其特征在于:所述工艺以锂渣、炉渣、石粉、钢渣为原料进行混合粉磨,其依次主要包括原料烘干工序、配料工序、混合粉磨工序,所述原料烘干工序中,控制锂渣、炉渣烘干至水分<0.7%,控制石粉烘干至水分<0.5%,控制钢渣烘干至水分<1.0%,分别得到干锂渣、干炉渣、干石粉和干钢渣;所述配料工序中,按干锂渣:干炉渣:干石粉:干钢渣=2.2~3.2:1:0.7:2的比例进行称量配比得到混合粉磨原料。本发明优点是直接粉磨生产混合粉作为混凝土掺杂料,简化了传统混合的生产工艺,提高了产品品质均匀度,降低生产能耗和成本。在粉磨细度达400m2/Kg以上的混合粉时,平均能耗为17.6KWh/t。
Description
技术领域
本发明涉及一种钢渣、锂渣、炉渣、石粉混合粉磨生产工艺。
背景技术
随着我国经济的迅猛发展,环境和资源问题正成为制约我国经济发展的瓶颈,走可持续发展的道路,是我国未来长期发展的重要策略。工业废渣的深度综合利用是可持续发展的核心之一。
电炉渣、转炉渣又称钢渣。钢渣是炼钢电炉、转炉炼钢产生的固体废弃物,日本、德国、美国等发达国家早就在80年已经利用,基本达到100%。我国是钢铁产量大国,占全世界总量近50%,因此我国也是钢渣产生量大国,每年钢渣产生量8000万吨,矿渣2.2亿多吨。然而我国钢渣利用率极低,目前,每年利用量有7000万吨左右,利用率为90%,矿渣利用率95%,利用量2.09亿吨。根据最新统计截止目前,钢铁渣累计堆存量11.1753亿吨。锂渣是锂辉石经过1150度~1300度高温煅烧后再用硫酸法提取的碳酸锂熟料经渗滤浸洗涤后排出的残渣。我国的新疆和四川射洪均建有锂盐厂,排出的锂渣占用土地,且易随风雨流失、污染环境,成为企业的沉重负担,必须进行大量试验研究和技术开发。
炉渣是煤或煤粉经锅炉燃烧后产生的不可燃固态残余物称为灰渣或称炉渣。通常将由层燃烧炉炉排后面的渣斗或煤粉炉冷灰斗排出的固态燃烧残余物称为炉渣。而将由烟气从鍋炉炉膛带出的固态燃烧残余物称为灰颗粒较大。一部分灰粒沉积在炉道中或烟道中的受热面管子表面上,清理出后都是炉渣。从烟道进入除尘器收集的就是炉灰,也称粉煤灰。
石粉是石头粉末的通称,是石材加工生产过程中产生的粉末石料。主要是本地区的花岗岩、麻石、大理石等石材加工过程中留下的粉末料。
对于上述钢渣、锂渣、炉渣、石粉的单独利用已经相对很多,但均存在一定的局限性,目前已经逐渐转为钢渣、锂渣以及炉渣等多种渣粉的混合利用,国内外传统技术是用立磨机来单粉钢渣、锂渣、炉渣,在将单独粉磨后的钢渣粉、锂渣粉、炉渣粉送入螺旋搅拌机混合、搅拌来生产的。存在投资成本大,运行费用高,成份不是很均匀品质级别低等问题。
因此,在钢渣、锂渣、炉渣、石粉的回收再利用技术中,如何在确保产品品质的基础上有效提高资源的利用率、节能降耗也提出了更高的要求。
发明内容
本发明要解决的技术问题是提供一种品质高、能耗低的一种钢渣、锂渣、炉渣、石粉混合粉磨生产工艺。
为解决上述技术问题,本发明的技术方案为:与权利要求相同
本发明的优点在于:
本发明通过对锂渣、炉渣、石粉、钢渣为原料进行烘干预处理,按照比例配比后加入一定量的增强助磨剂进入球磨机,并配合相应的设备和工艺参数直接粉磨生产混合粉作为混凝土掺杂料,简化了传统混合的生产工艺,提高了产品品质均匀度,降低生产能耗和成本。在粉磨细度达400m2/Kg以上的混合粉时,平均能耗为17.6KWh/t。
附图说明
图1为本发明工艺流程图。
具体实施方式
如图1所示,本发明钢渣锂渣炉渣石粉烘干及粉磨生产工艺流程以锂渣、炉渣、石粉、钢渣为原料进行混合粉磨,其依次主要包括原料烘干工序、配料工序、混合粉磨工序,
S1:原料烘干工序,锂渣、炉渣、石粉、钢渣原料分别存放在储存堆棚内,并在储存堆棚内存放15~30天,晾去除部分水分;
然后,将锂渣、炉渣、石粉、钢渣送至独立的配料仓进行称量计量,然后通过第一皮带输送机分别送入三筒烘干机进行烘干;在三筒烘干机内分别烘干锂渣、炉渣、石粉、钢渣,控制锂渣、炉渣烘干至水分<0.7%,控制石粉烘干至水分<0.5%,控制钢渣烘干至水分<1.0%,分别得到干锂渣、干炉渣、干石粉和干钢渣;再由第二皮带输送机分别送进干锂渣中间仓、干炉渣中间仓、干石粉中间仓、干钢渣中间仓。
本工序中,优选控制锂渣、炉渣烘干至水分<0.6%,控制石粉烘干至水分<0.45%,控制钢渣烘干至水分<1.0%。
S2:配料工序,储存在各中间仓中的干锂渣、干炉渣、干石粉和干钢渣根据配比要求由各自称量给料机进行称量得到混合粉磨原料渣,称量时按干锂渣:干炉渣:干石粉:干钢渣=2.2~3.2:1:0.7:2 的比例进行称量配比,并由第三皮带输送机一起送进球磨机;若该批次干锂渣水分<0.3%,则控制干锂渣:干炉渣:干石粉:干钢渣=2.2~2.6:1:0.7:2。
S3:混合粉磨工序,混合粉磨工序采用闭路循环粉磨工艺,混合粉磨原料渣送入球磨机直接粉磨,控制球磨机参数如下表:
本实施例中,球磨机粉磨钢渣粉步骤中,控制球磨机的各项参数表:
在球磨机粉磨混合粉磨原料渣过程中,实时监测球磨机磨盘垂直方向和水平方向振幅,若垂直方向振幅>2.5mm,水平方向振幅>2mm 时,则对球磨机进行内部喷水,喷水量在0.5-2m3/h,直至垂直方向振幅<2.5mm,水平方向振幅<2mm;在立磨过程中,同时实时监测球磨机内进入的热风温度,在干锂渣与干钢渣组分比例在1.1:~1.4:1 之间时,若进入的热风温度>340℃,则对球磨机要进行内部喷水,喷水量在0.5-2m3/h,直至温度<340℃;在干锂渣与干钢渣组分比例在1.4~1.6:1时,若进入的热风温度>326℃,则对球磨机要进行内部喷水,喷水量在0.5-2m3/h,直至温度<326℃;
粉磨后的渣粉输送至选粉机,由选粉机分选出的细度小于400m2 /Kg混合粉由回收斜槽重新送回到球磨机再次粉磨,分选出的细度达到400m2/Kg混合粉输送至粉库储存。
基于本实施例的混合粉作为混凝土掺杂料,其技术指标如下表所示:
Claims (5)
1.一种钢渣、锂渣、炉渣、石粉烘干及粉磨生产工艺,其特征在于:
所述工艺以锂渣、炉渣、石粉、钢渣为原料进行混合粉磨,其依次主要包括原料烘干工序、配料工序、混合粉磨工序,
所述原料烘干工序中,控制锂渣、炉渣烘干至水分<0.7%,控制石粉烘干至水分<0.5%,控制钢渣烘干至水分<1.0%,分别得到干锂渣、干炉渣、干石粉和干钢渣;
所述配料工序中,按干锂渣:干炉渣:干石粉:干钢渣=2.2~3.2:1:0.7:2的比例进行称量配比得到混合粉磨原料;
所述混合粉磨工序中,混合粉磨原料送入球磨机进行混合球磨,直至得到细度达到400m2/Kg的混合粉。
4.根据权利要求1所述的钢渣、锂渣、炉渣、石粉烘干及粉磨生产工艺,其特征在于:所述混合粉磨工序采用闭路循环粉磨工艺,混合粉磨原料渣送入球磨机直接粉磨,控制球磨机的磨辊压力在10-11MPa,热风入球磨机温度300-350℃,风量在20*104-22*104m3/h,热风出球磨机温度85-90℃,球磨机的选粉机转速在140-150r/min;粉磨后的渣粉输送至选粉机,由选粉机分选出的细度小于400m2/Kg混合粉由斜槽重新送回到球磨机再次粉磨,分选出的细度达到400m2/Kg混合粉输送至粉库储存。
5.根据权利要求4所述的钢渣、锂渣、炉渣、石粉烘干及粉磨生产工艺,其特征在于:在球磨机粉磨混合粉磨原料渣过程中,实时监测球磨机磨盘垂直方向和水平方向振幅,若垂直方向振幅>2.5mm,水平方向振幅>2mm时,则对球磨机进行内部喷水,喷水量在0.5-2m3/h,直至垂直方向振幅<2.5mm,水平方向振幅<2mm;在立磨过程中,同时实时监测球磨机内进入的热风温度,在干锂渣与干钢渣组分比例在1.1:~1.4:1之间时,若进入的热风温度>340℃,则对球磨机要进行内部喷水,喷水量在0.5-2m3/h,直至温度<340℃;在干锂渣与干钢渣组分比例在1.4~1.6:1时,若进入的热风温度>326℃,则对球磨机要进行内部喷水,喷水量在0.5-2m3/h,直至温度<326℃。
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