CN102219404A - Preparation method of ultrafine slag slurry - Google Patents
Preparation method of ultrafine slag slurry Download PDFInfo
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- CN102219404A CN102219404A CN2011100763428A CN201110076342A CN102219404A CN 102219404 A CN102219404 A CN 102219404A CN 2011100763428 A CN2011100763428 A CN 2011100763428A CN 201110076342 A CN201110076342 A CN 201110076342A CN 102219404 A CN102219404 A CN 102219404A
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Abstract
The invention discloses a preparation method of ultrafine slag slurry which comprises the following steps: step 1, performing dry grinding of granulated blast furnace slag according to a present method to prepare coarse powder; step 2, adding water and a few dispersants (activators) into the prepared coarse powder, and performing rapid wet fine grinding by a vertical or horizontal stirring grinding machine with an appropriate volume to prepare slag slurry. The slurry fineness is determined with reference to GBT18046-2008, and finer slurry can be produced according to the requirements of customers. The prepared slurry is pumped into a measuring pail, is used immediately after grinded, and can substitute part of or even all cement and be used in production. According to the rapid wet grinding process, the slag can be grinded finer; the slag activity is allowed to play better; more substitution of cement is provided; the change of waste into valuables is truly realized; and the requirements of low carbon and circular economy are met better. Dust emission does not occur during the production and application processes, and clean production is realized.
Description
Technical field
The present invention relates to a kind of preparation method of ultrafine slag slurry, especially a kind of suit in the bigger factory of cement consumptions such as commerical ready-mixed concrete stirring station, cement pipe pile factory, cement Bricks and Tiles Plant or near production, be used for the quick Ginding process of the part even the slag of replacing whole cement slurry, realize that existing mill is existing to use.Belong to slag slurry technical field of producing.
Background technology
Slag full name granulated blast-furnace slag is that blast furnace ironmaking fused slag has little time crystallization and the glass state material that forms when quenching, is fine-grannular.The fused slag flows directly into that refrigerative is water-granulated slag again in the pond, is commonly called as grain slag.Belong to the phyllosilicate material, potential hydraulic gelling property is arranged.Pig iron discharging 0.3-1 ton slag per ton.Slag belonged to waste residue originally, can only be used in industries such as cement, concrete, road engineering as extensive ground of blended material admixture.Be exploited gradually in recent years.Mainly with its deep processing, make powder through extra-fine grinding, be activated back chance water like this hydration reaction can take place, solidify gradually, to final set, intensity improves gradually through initial set, can part even replacing whole cement.All adopt dry mill process up to now, wear into slag micropowder.
The slag grinding technics all adopts the dry method grinding process at present, and mainly use equipment has following several: 1, large-scale Vertical Mill was import originally, costs an arm and a leg, and existing homemade, price is not low yet; 2, roll-in mill (or post mill) adds the combination of pipe mill; 3, the direct open and close of pipe mill road mill; 4, the pipe mill adds the vibration mill combination; 5, also available other equipment and combination.Above dry grind process has their own characteristics each, and the product fineness of suitable for producing is S75, S95 level.Producing the S105 level is fineness＞500m
2Efficient is not high during/kg, yields poorly.Product unit consumption of energy height, economic worth does not have advantage.So major part is the S95 product on the market.S105 and above high grade product are less.
Summary of the invention
Technical problem at above-mentioned present situation and existence the objective of the invention is: proposed a kind of suit in the big factory of cement consumptions such as commerical ready-mixed concrete stirring station, cement pipe pile factory or near, the quick Ginding process of the slag slurry of " existing mill existing with ".
Technical solution of the present invention is achieved in that a kind of quick Ginding process of slag slurry, comprises following two steps:
One, dry method system meal; Be about to the granulated blast-furnace slag dry method and grind into meal, equipment can be selected all kinds of Vertical Mills, roll-in mill, column mill, traditional ball mill, vibration mill for use, be joined powder separating machine or other reasonable combination etc., because of only grinding meal, can improve dry grinding output and efficient greatly.
Two, the fast defibrination of wet method; Will more than make that meal adds water and paucidisperse (activation) agent is made into slurry earlier, or the three adds grinding machine together, grinding machine can adopt the vertical or horizontal agitator mill of appropriate volume, unit or multimachine series connection and adapted wet classification system make the slag slurry through the quick fine grinding of wet method, and the slurry fineness can be carried out with reference to the GBT18046-2008 standard, also can be the slurry that the client produces thinner requirement, the slurry that makes pumps into gauging tank, now grinds existing usefulness, and alternative part even whole cement are used for production.
Because the utilization of technique scheme, the present invention compares with existing technology has following advantage:
1, the quick Ginding process of slag of the present invention slurry, utilize slag micropowder meet water generation hydration reaction but initial set also for some time, most of in characteristic more than 3 hours; Can be at the quick wet-milling slag of concrete mixing plant slurry, a flow process: add water from meal and allocate truck mixer into and approximately only need 15 minutes to wearing into slurry, continuous production now grinds existing usefulness, still can have the enough time can not solidify.Having overcome in the prior art slag can only be with the technology prejudice of dry method grinding process.
2, the wet method mill pearl major part that stirs the grinding-in cover is of a size of Φ 1.5-5mm, and the surface area ratio pipe mill of mill pearl increases by tens times with the surface-area of big steel ball (Φ 20-100mm), heightens with the material touch opportunity.Grind the pearl movement velocity simultaneously and significantly improve (being about 10m/s), far above dry method ball milling (linear velocity is about 2m/s) at a slow speed.And, slabbing action is arranged, so its mill efficiency significantly rises because water as medium is arranged.
3, vertical or other roll-in mills are fit to grind the powder of certain fineness, and more the fine powder body mainly by classification repeatedly, only do classification and do not grind by a large amount of electric energy of high-power classification blower fan consumption, produces very fine powder body and uneconomical.Even so adopt the import Vertical Mill to produce the above expensive goods of the also less production S105 of large-lot producer of slag micropowder on the market, based on middle-grade S95, treatment capacity is big so substantially, could be with to produce slag consistent, but also do not give full play to the slag activity.
4, the slag powder is thin more in theory, and surface energy is high more, activation is good more, intensity is high more.Can the part in addition replacing whole cement, have experimental data that the scholar does as follows, also with the theory consistent.
Promptly work as the slag powders fineness and reach 800m
2During/kg, its 3 days intensity are the same with cement, and 28 days strength ratio cement is high nearly 30%, but single-candidate place of cement fully not only can also be improved concrete performance.The concrete of mixing slag micropowder in a large number has many advantages: hydration heat is low, and pourable large-scale concrete engineering is as dam etc.; Good endurance, the later strength height; Strong with the reinforcing bar cohesive force, anti-micro or the like, existing big quantity research of Chinese scholars and report.So the raising mill efficiency is ground slag thinner, can create bigger added value.Alternative ratio to cement can further improve, and turns waste into wealth.Thereby save the required energy of manufacture of cement, resource in a large number, reduce a large amount of CO
2Discharging meets low-carbon economy, recycling economy requirement.
5, generally contain 10% left and right sides moisture content owing to after the slag shrend, and the water-content of slag micropowder requires below 1%, the conference of material water content causes vexed mill under the dry ball milling processing condition simultaneously, so must dry before going into ball milling; Vertical Mill can grind while drying.The two all consumes a large amount of energy, and micro mist adds water again when using and stirs this actual waste that causes the energy.It is work in-process that step 1 of the present invention makes meal, and production unit also should select for use Vertical Mill, roll-in mill (or post mill) to add powder separating machine, advances grind materials moisture content and can be below 15%, moisture content is lower after the cool solarization in stockyard, need not dry, can save a large amount of energy like this, reduce production costs.
6, because of slag than the difficult mill of cement, fineness requirement is higher, dry grinding equipment has only maximization, the superpower just can the amount of producing at full capacity requirement.So just cause equipment volume huge, investment is high, installs complicated, the maintenance trouble, the place takies greatly, and in the inventive method wet method to grind equipment volume soon little, invest low, install easily, maintenance is simple, and the place takies little, can be arranged in the user scene, now the existing usefulness of mill significantly reduces cost of investment.
7, in dry production and the use airborne dust is arranged unavoidably, contaminate environment impairs one's health.And wet grinding produces and uses integratedly, and whole process airborne dust is few, meets the requirement of cleaner production.
Embodiment
Country realized civilized construction in order to guarantee construction engineering quality in recent years, and most of area has forbidden stirring at the construction field (site) the system concrete, has carried out commodity and has stirred concrete in advance.To the hundreds of all places, the cement annual consumption reaches several ten thousand to the hundreds of thousands of ton to single stirring station scale at hundreds of thousands of.Create condition for on-the-spot wet-milling slag place of cement fast like this, possessed operability.
Below in conjunction with specific embodiment the present invention is described.Described vertical fast quick mill can be vertical or horizontal stirring mill, and the linear velocity of its rod dish outer end speed is 3～25m/s; Stirring system can adopt all kinds of bar types, each disc-like type or rod dish combined type, spiral; Grinding mill barrel can be selected monotubular or many disjunctors, and the cylindrical shell shape can be used circle or Polygons; The rod dish is outside, the cylindrical shell liner can be selected polyurethane material for use, and wear resistance is fine, also can select wear-resistant metal material for use; Electrical control system adopts speed control by frequency variation then best, and not only power saving but also be easy to adjust rotating speed and adjust output is and with flux matched; Grinding medium adopts ceramic bead, steel ball or other mill pearls; Grinding machine can be emitted slurry earlier when produce to need shutting down, and the mill pearl stays still in the machine easily that water cleans, and washes out after water can survey solid content, is equipped with the part dry cement, and being used for concrete batching does not waste.
Embodiment 1
A kind of preparation method of ultrafine slag slurry comprises following steps:
1, dry grinding system meal: slag is cool through the stockyard to shine the back deironing, sieve into that vertical roll grinder grinds meal, and this type of type is furnished with hierarchy system, efficient height during the required meal of grinding present method, and output is big.And granularity is easy to adjust and sets, and classification is accurate.Making fineness is 200-250m
2/ kg slag powders is gone into silos.
2, the fast grinder preface of wet method: add 4% gypsum meal during production and prepare 70% left and right sides solid content slurry, add the paucidisperse agent, advancing the 1000L stirring system is the vertical stirring mill of disc type,, advance slurry down and go up pulp; Mill power 132-168KW, linear velocity is about 10-12m/s, selecting Φ 3～4mm density for use is 3.2g/cm
3Zirconium aluminium composite ceramic beads do the mill pearl.A loading amount 1200KG detects fineness, adjusts the fresh feed pump flow according to fineness, grinds fineness and meets S105 (greater than 500m
2/ kg) slag is starched, and pumps into gauging tank, and the back of giving money as a gift substitutes 50%42.5 cement and is used for cement brick production.
Embodiment 2
A kind of preparation method of ultrafine slag slurry comprises following steps:
1, dry grinding system meal:.Meet S75 level product from the purchase of existing slag powders factory, fineness is＞300m
2/ kg (generally having contained 4% left and right sides gypsum).
2, the fast grinder preface of wet method; Above meal is prepared 70% left and right sides solid content slurry, can add the paucidisperse agent, advance the 2000L stirring system and grind in conjunction with vertical stirring, advance slurry down and go up pulp for the rod dish.Mill power 250-315KW, linear velocity is about 10-12m/s, selecting Φ 2.5-3.5mm density for use is 4.0g/cm
3The Zirconium silicate ceramic pearl make mill pearl, a loading amount 2500-3000KG.Detect fineness and adjust flow, grind fineness greater than 600m
2/ kg slag slurry pumps into gauging tank, and the back of giving money as a gift substitutes 60-70%42.5 cement and allocates truck mixer into.
Embodiment 3
A kind of preparation method of ultrafine slag slurry comprises following steps:
1, meal is made in dry grinding: slag deironing after the cool solarization in stockyard, sieve into roll-in mill or column mill, and existing 40-70% meets the meal of the fast grinder preface requirement of road wet method down in the circulation blanking, with powder separating machine it is selected, and nonconforming part is returned mill.Making fineness is 150-200m
2/ kg slag powders, it is bigger to grind this meal output.
2, the fast grinder preface of wet method: it is that bar type stirs mill that this meal is advanced first 2000L stirring system, charging and Jia Shui, dispersion agent (controlling 70% left and right sides solid content) in the employing, the mode of following pulp, mill power 315KW, linear velocity is about 8-10m/s, and selecting Φ 5-8mm density for use is 2.7g/cm
3Ceramic bead do the mill pearl, once adorn 2000KG.First section mill disposed slurry advanced second 2000L stirring system for rod coils in conjunction with vertical agitator mill again through (can the add terra alba this moment) series connection of turnover slurry, advance slurry under adopting and go up the pulp mode.Mill power 315KW, linear velocity is about 10-12m/s, selecting Φ 2.5-3.5mm density for use is the Zirconium silicate ceramic pearl work mill pearl of 4.0g/cm3.A loading amount 2500-3000KG detects fineness and adjusts flow.Grind fineness greater than 700m
2/ kg slag slurry pumps into gauging tank, and the back of giving money as a gift substitutes 70-80%42.5 cement and allocates truck mixer into.
Embodiment 4
1, dry grinding system meal: meet S95 level product (generally having contained 4% left and right sides gypsum) from the purchase of existing slag powders factory.
2, the fast grinder preface of wet method; Above meal is prepared 70% left and right sides solid content slurry, can add the paucidisperse agent, advancing the 300L stirring system is the vertical stirring mill of disc type, advances slurry down and goes up pulp.Mill power 75KW, linear velocity is about 10-12m/s, selecting Φ 2.5-3.5mm density for use is 4.0g/cm
3The Zirconium silicate ceramic pearl make mill pearl, a loading amount 500KG.Detect fineness and adjust flow, grind fineness greater than 800m
2/ kg slag slurry pumps into gauging tank, and the back of giving money as a gift substitutes 90-100%42.5 cement, is used for cement pipe pile production.
Embodiment 5
1, dry grinding system meal: slag enters the stockyard and coolly shines oven dry back, deironing, sieves and gypsum advances have traditional ball mill, because of playing the corase grind effect, can set than coarse grain directly, and output will be multiplied, and this method goes into to grind leading portion, and to add a column mill better.Making fineness is 150-200m
2/ kg slag powders.
2, the fast grinder preface of wet method: it is the bar type agitator mill that this meal is advanced first 2000L stirring system, charging and Jia Shui, dispersion agent (controlling 70% left and right sides solid content) in the employing, the mode of following pulp, mill power 315KW, linear velocity is about 8-10m/s, and selecting Φ 5-8mm density for use is 2.7g/cm
3Ceramic bead do the mill pearl, once adorn 2000KG.Grind fineness greater than 400m
2/ kg (S95 level) slag stock pump is gone into gauging tank, and the back of giving money as a gift substitutes 30%42.5 cement and allocates truck mixer into.
Embodiment 6
1, dry grinding system meal: slag is cool through the stockyard to shine the back deironing, advance to make after fine crusher sieves＜the 4mm fine particle, advances column mill again, and basic in the grinding machine blanking is following small-particle of 2mm and powder compound.Gypsum is easily levigate can not to advance column mill after broken.
2, the fast grinder preface of wet method:
This is contained the gypsum coarse fodder, and to advance first 2000L stirring system be spiral vertical agitator mill, the mode of charging and Jia Shui in the employing (controlling 70% left and right sides solid content), following pulp, mill power 315KW, linear velocity is about 3～5m/s, select for use the steel ball of Φ 10～20mm to make abrading-ball, once adorn 4000KG, grinding specific surface is 300m
2The above fineness slurry of/kg.Continuously pulp sieves, and a small amount of sieve is gone up coarse particles and advanced first machine and return mill, sieve down the series connection of screened stock material to advance second 2000L stirring system again be the vertical fast quick mill of disc type, adopt and advance upward pulp mode of slurry down.Mill power 315KW, linear velocity is about 10-12m/s, selecting Φ 2.5-3.5mm density for use is the Zirconium silicate ceramic pearl work mill pearl of 4.0g/cm3, a loading amount 2500-3000KG.Detect fineness, adjust flow.Grind fineness greater than 500m
2/ kg slag stock pump is gone into gauging tank.Alternative 50%42.5 cement in back of giving money as a gift are allocated truck mixer into.
The foregoing description only is explanation technical conceive of the present invention and characteristics; its purpose is to allow the personage that is familiar with this technology can understand content of the present invention and is implemented; can not limit protection scope of the present invention with this; all equivalences that spirit is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (1)
1. the preparation method of a ultrafine slag slurry comprises following two steps:
One, dry method system meal; Be about to the granulated blast-furnace slag dry method and grind into meal, equipment can be selected existing dry grinding equipment for use, because of only grinding meal, can improve dry grinding output and efficient greatly;
Two, the fast defibrination of wet method; Will more than make that meal adds water and paucidisperse (activation) agent is made into slurry earlier, or the three adds grinding machine together, grinding machine can adopt the vertical or horizontal agitator mill of appropriate volume, unit or multimachine series connection and adapted wet classification system make the slag slurry through the quick fine grinding of wet method, and the slurry fineness can be carried out with reference to the GBT18046-2008 standard, also can be the slurry that the client produces thinner requirement, the slurry that makes pumps into gauging tank, now grinds existing usefulness, and alternative part even whole cement are used for production.
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| CN2011100763428A CN102219404A (en) | 2011-03-29 | 2011-03-29 | Preparation method of ultrafine slag slurry |
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| CN2011100763428A CN102219404A (en) | 2011-03-29 | 2011-03-29 | Preparation method of ultrafine slag slurry |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104478269A (en) * | 2014-11-05 | 2015-04-01 | 上海宝田新型建材有限公司 | Ultrafine slag powder, and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067941A (en) * | 1992-07-06 | 1993-01-13 | 水利水电科学研究院岩土工程研究所 | Cement wet grinching method by vibration mill |
| CN1245786A (en) * | 1999-09-10 | 2000-03-01 | 华南理工大学 | Method for making calcium metasilicate type binding material at normal temp. by using boundary limestone quarry |
| CN1257845A (en) * | 1999-12-13 | 2000-06-28 | 王育强 | Process for preparing cement by wet grinding of waste slags |
| US6241816B1 (en) * | 1997-03-26 | 2001-06-05 | Vladimir Ronin | Method of treating cement clinker |
-
2011
- 2011-03-29 CN CN2011100763428A patent/CN102219404A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067941A (en) * | 1992-07-06 | 1993-01-13 | 水利水电科学研究院岩土工程研究所 | Cement wet grinching method by vibration mill |
| US6241816B1 (en) * | 1997-03-26 | 2001-06-05 | Vladimir Ronin | Method of treating cement clinker |
| CN1245786A (en) * | 1999-09-10 | 2000-03-01 | 华南理工大学 | Method for making calcium metasilicate type binding material at normal temp. by using boundary limestone quarry |
| CN1257845A (en) * | 1999-12-13 | 2000-06-28 | 王育强 | Process for preparing cement by wet grinding of waste slags |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104478269A (en) * | 2014-11-05 | 2015-04-01 | 上海宝田新型建材有限公司 | Ultrafine slag powder, and preparation method and application thereof |
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Application publication date: 20111019 |