CN105855014A - Steel slag superfine powder production process - Google Patents

Steel slag superfine powder production process Download PDF

Info

Publication number
CN105855014A
CN105855014A CN201610183832.0A CN201610183832A CN105855014A CN 105855014 A CN105855014 A CN 105855014A CN 201610183832 A CN201610183832 A CN 201610183832A CN 105855014 A CN105855014 A CN 105855014A
Authority
CN
China
Prior art keywords
steel slag
fine powder
superfine powder
tailings
steam
Prior art date
Application number
CN201610183832.0A
Other languages
Chinese (zh)
Inventor
宋宇
武国平
许立谦
张德国
唐卫军
Original Assignee
北京首钢国际工程技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 北京首钢国际工程技术有限公司 filed Critical 北京首钢国际工程技术有限公司
Priority to CN201610183832.0A priority Critical patent/CN105855014A/en
Publication of CN105855014A publication Critical patent/CN105855014A/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00Disintegrating plant with or without drying of the material

Abstract

The invention discloses a steel slag superfine powder production process and belongs to the technical field of resource comprehensive utilization and environment protection. The steel slag superfine powder production process comprises the steps that a coarse grinding device is used for conducting coarse crushing on steel slag tailings; the steel slag tailings subjected to coarse crushing are sorted by a screening magnetic separation device and then are divided into tailing fine powder and magnetic iron; the tailing fine powder enters a steam crushing device and is impacted and crushed by overheated high energy steam; the mixture of the steel slag superfine powder formed after impacting and crushing by the high energy steam and the overheated steam enters a superfine powder sorting device; the steel slag superfine powder is discharged out of the superfine powder sorting device and enters a steel slag superfine powder bin; and the overheated steam is discharged out of the top of the superfine powder sorting device and collected by a steam collection device. The steel slag superfine powder production process has the advantages that ferric oxide in the tailings is extracted to the greatest extent, the produced steel slag superfine powder not only can be used as concrete additives, but also can be used as rubber and plastic filling and coating filling, and the price of the powder is up to more than one thousand yuan per ton.

Description

A kind of steel slag super fine powder production technology

Technical field

The invention belongs to comprehensive utilization of resources and environmental protection technical field, in particular, provide a kind of slag and surpass Fine powder production technique.

Background technology

Steel slag tailings, as steel-making solid waste, owing to it is difficult, is presently mainly thrown aside.Minority steel Factory can reclaim small amounts ferrum after fine grinding, and using fine grinding powder as concrete admixture, adopts in this way Fine grinding powder after process is big as concrete admixture not only granularity, specific surface area is little, and ferrum oxide separates Extraction degree is low, has the material silicon of cement cementitious activity, calcium, aluminum, magnesium type oxide in ferrum oxide and tailings Mixed in together, the gelation activity of fine grinding powder can be had a strong impact on, if mixed as cement by these fine grinding powders Close material to use, also result in cement later stage volumetric expansion (free calcium oxide causes volumetric expansion), and fill The adverse consequencess such as weak effect (grain graininess is uneven).In order to improve the utilizing status of fine grinding powder further, Generally require and repeatedly grind screening, thus be greatly increased production cost.

Summary of the invention

It is an object of the invention to provide a kind of steel slag super fine powder production technology, use the side that high energy steam is pulverized Steel slag tailings is broken into the micropowder of below 1000 mesh by method, thus farthest extracts the oxidation in tailings Ferrum, the steel slag super fine powder of production acts not only as concrete admixture, it is also possible to as rubber filling and coating Filler, powder per ton reaches as high as more than thousand yuan.

The step that the present invention produces steel slag super fine powder is as follows:

(1) steel slag tailings corase grind: use corase grind device that steel slag tailings is carried out coarse crushing, the steel after coarse crushing Slag tailings is divided into tailings fine powder and Armco magnetic iron after screening magnetic separation;

(2) steam is pulverized: tailings fine powder enters in steam reducing mechanism, uses overheated high energy steam to tail Slag fine powder carries out impact grinding;

(3) micropowder sorting: the slag after high energy steam impact grinding is divided into two, and a part is steel Slag micropowder and the mixture of superheated steam, another part is bulky grain slag.Micropowder sorting unit is by slag Micropowder separates with the mixture of superheated steam, and steel slag super fine powder is discharged into steel bottom micropowder sorting unit In the ultra-fine powder cabin of slag, superheated steam is then discharged from micropowder sorting unit top and is collected by vapor collecting apparatus.

The raw material producing micropowder is steel slag tailings.

The invention have the advantages that

Owing to production technology have employed corase grind and the method for steam pulverizing, steel slag tailings can be crushed to Below 1000 mesh, steel slag tailings then can only be milled down to about 400 mesh by traditional steel slag tailings fine grinding technology, Solve a difficult problem for steel slag tailings super-refinement;

Steam reducing mechanism impact grinding tailings fine powder uses the steam of waste heat recovery, has saved and has produced into This;

Steam reducing mechanism can realize the high efficiency separation of Armco magnetic iron and steel slag super fine powder, can be effectively improved steel The gelation activity of slag micropowder, improves the added value of steel slag super fine powder.

Accompanying drawing explanation

Fig. 1 is the process flow diagram of the present invention.Wherein, corase grind device 1, screening concentration equipment 2, steaming Vapour reducing mechanism 3, micropowder sorting unit 4, vapor collecting apparatus 5, steel slag super fine powder storehouse 6.

Detailed description of the invention

1) < 10mm steel slag tailings is crushed to below 0.1mm, roughly grinds device by granularity to use corase grind device 1 1 both can use ball mill can also use vertical mill.

2) steel slag tailings is after corase grind device 1 is broken, enters screening concentration equipment 2 and carries out sieving and magnetic separation, It is divided into tailings fine powder and Armco magnetic iron, screening concentration equipment 2 can use refiner after screening magnetic separation.

3), in tailings fine powder enters steam reducing mechanism 3, use overheated high energy steam that tailings fine powder is carried out Impact grinding, steam pressure is 0.1~0.4MPa, and vapor (steam) temperature is 230~260 DEG C, steel slag super fine powder and steam Mixture be discharged into micropowder sorting unit 4 from the top of steam reducing mechanism 3, bulky grain slag then from Discharge bottom steam reducing mechanism 3.

4) steel slag super fine powder is separated by micropowder sorting unit 4 with the mixture of steam, and steel slag super fine powder is from super Being discharged into steel slag super fine powder storehouse 6 bottom fine powder sorting unit 4, steam is then from micropowder sorting unit 4 top Discharge and collected by vapor collecting apparatus 5.

Embodiment described above is only to be described the preferred embodiment of the present invention, not to the present invention Scope be defined, on the premise of designing spirit without departing from the present invention, this area ordinary skill technical staff The various deformation making technical scheme and improvement, all should fall into claims of the present invention and determine Protection domain in.

Claims (2)

1. a steel slag super fine powder production technology, it is characterised in that technological process is as follows:
(1) steel slag tailings corase grind: use corase grind device (1) that steel slag tailings is carried out coarse crushing, Steel slag tailings after coarse crushing is divided into tailings fine powder and Armco magnetic iron after screening magnetic separation;
(2) steam is pulverized: tailings fine powder enters in steam reducing mechanism (3), and it is overheated to use High energy steam carries out impact grinding to tailings fine powder;
(3) micropowder sorting: the slag after high energy steam impact grinding is divided into two, Being divided into the mixture of steel slag super fine powder and superheated steam, another part is bulky grain slag;Micropowder Steel slag super fine powder is separated by sorting unit (4) with the mixture of superheated steam, and steel slag super fine powder is from super In fine powder sorting unit (4) bottom is discharged into steel slag super fine powder storehouse (6), superheated steam then from Micropowder sorting unit top is discharged and is collected by vapor collecting apparatus (5).
Steel slag super fine powder production technology the most according to claim 1, it is characterised in that: produce The raw material of micropowder is steel slag tailings.
CN201610183832.0A 2016-03-28 2016-03-28 Steel slag superfine powder production process CN105855014A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610183832.0A CN105855014A (en) 2016-03-28 2016-03-28 Steel slag superfine powder production process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610183832.0A CN105855014A (en) 2016-03-28 2016-03-28 Steel slag superfine powder production process

Publications (1)

Publication Number Publication Date
CN105855014A true CN105855014A (en) 2016-08-17

Family

ID=56626162

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610183832.0A CN105855014A (en) 2016-03-28 2016-03-28 Steel slag superfine powder production process

Country Status (1)

Country Link
CN (1) CN105855014A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106694517A (en) * 2016-12-25 2017-05-24 北京首钢国际工程技术有限公司 Production process for preparing steel slag micropowder through steel slag magnetic separation powder purification synergistically
CN108298835A (en) * 2018-02-23 2018-07-20 四川省达州钢铁集团有限责任公司 A method of producing slag micropowder with blast furnace granulated slag

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1170340A (en) * 1997-07-03 1999-03-16 Hosokawa Alpine Ag Method and apparatus for fluidized layer/jet grinding
CN101716547A (en) * 2008-10-10 2010-06-02 卢忠远 Method for preparing ultra-fine powder by waste heat of plant
CN103386354A (en) * 2013-07-22 2013-11-13 南通万豪建材科技有限公司 Production method of superfine slag powder
CN104307614A (en) * 2014-06-13 2015-01-28 江苏融达新材料股份有限公司 A method of grinding steel slag powder and mine slag powder and producing steel and iron slag powder by a vertical grinding mill

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1170340A (en) * 1997-07-03 1999-03-16 Hosokawa Alpine Ag Method and apparatus for fluidized layer/jet grinding
CN101716547A (en) * 2008-10-10 2010-06-02 卢忠远 Method for preparing ultra-fine powder by waste heat of plant
CN103386354A (en) * 2013-07-22 2013-11-13 南通万豪建材科技有限公司 Production method of superfine slag powder
CN104307614A (en) * 2014-06-13 2015-01-28 江苏融达新材料股份有限公司 A method of grinding steel slag powder and mine slag powder and producing steel and iron slag powder by a vertical grinding mill

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106694517A (en) * 2016-12-25 2017-05-24 北京首钢国际工程技术有限公司 Production process for preparing steel slag micropowder through steel slag magnetic separation powder purification synergistically
CN106694517B (en) * 2016-12-25 2019-01-15 北京首钢国际工程技术有限公司 A kind of steel scoria magnetic separation powder purification coordinate system for slag micro powder production technology
CN108298835A (en) * 2018-02-23 2018-07-20 四川省达州钢铁集团有限责任公司 A method of producing slag micropowder with blast furnace granulated slag

Similar Documents

Publication Publication Date Title
CN103418488B (en) Comprehensive recovery process for lithium-containing polymetallic ore with associated fine-grained niobium-tantalum
CN103041912B (en) Beneficiation method of low-grade ilmenite
CN103041920B (en) A kind of beneficiation method being suitable for chromium depleted zone and ore-sorting system
CN101428248B (en) Beneficiation method for recycling specularite
CN103191828B (en) Floating titanium collecting agent and low-grade ilmenite separating method using same
CN101559403B (en) Method for concentrating extremely low-grade refractory magnetite
CN101850295B (en) Beneficiation method for producing high-quality iron ore concentrate by low-grade magnetic iron ore
CN102205273B (en) Beneficiation process of low-grade magnetite and specularite mixed ore
CN103480483B (en) A kind of phosphorus ore heavymedia separation and direct reverse flotation process integration
CN104162475B (en) A kind of energy-efficient chromium depleted zone stone associating comminution magnetic separation new method
CN103567051B (en) Small-scale lean hematite separation technology
CN105251606B (en) The refining technique of lepidolite in a kind of tantalum niobium concentrate barren rock
CN101219413B (en) Technique for manufacturing hyperpure iron extract
CN102249236B (en) Production process for silicon carbide micropowder
CN102688880B (en) Method for efficiently recovering and reselecting steel slag
CN103736588B (en) Efficient beneficiation method of comprehensively recovering low-grade vanadium titano-magnetite
CN104258980B (en) A kind of uranium-bearing paigeite sorting process
CN102240588B (en) Dry-grinding and dry-separation method of magnetite
CN104060108B (en) A kind of method extracting vanadium from high calcium siliceous shale containing vanadium
WO2012167519A1 (en) Comprehensive process for reclaiming metallic copper from high-grade furnace slag containing copper
CN104923386A (en) Micro-fine disseminated mixed ore coarse size preconcentrating and magnetic-gravitational separating process
CN101643835B (en) Method for improving pelletization in iron ore concentrate pretreatment
CN104888947B (en) The magnetic separation of fine grain teeth cloth magnetic-red composite ore-centrifuge sorting process
CN102172556A (en) High-pressure roller milling-preselection processing method for vanadic titanomagnetite
CN101624654A (en) Method for recycling iron and aluminum by particle size grading pretreatment of Bayer process red mud

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20160817

WD01 Invention patent application deemed withdrawn after publication