CN105214780A - A kind of production method of vertical mill grinding lithium ground-slag - Google Patents
A kind of production method of vertical mill grinding lithium ground-slag Download PDFInfo
- Publication number
- CN105214780A CN105214780A CN201510595924.5A CN201510595924A CN105214780A CN 105214780 A CN105214780 A CN 105214780A CN 201510595924 A CN201510595924 A CN 201510595924A CN 105214780 A CN105214780 A CN 105214780A
- Authority
- CN
- China
- Prior art keywords
- slag
- vertical mill
- lithium
- grinding
- mill
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Abstract
The present invention relates to a kind of production method of vertical mill grinding lithium ground-slag, it is characterized in that: described step is followed successively by vertical mill grinding lithium ground-slag step and vertical mill lithium ground-slag mill feed back closed cycle step.The invention has the advantages that: adopt vertical mill to carry out in lithium slag grinding process, by controlling suitable grinding roller pressure and inner parameter, and then obtaining qualified lithium slag micropowder and underproof lithium ground-slag mill feed back; And send grinding feed back back to vertical mill as early as possible and carry out closed cycle, realize making full use of of resource.
Description
Technical field
The present invention relates to a kind of production method of vertical mill grinding lithium ground-slag.
Background technology
China is the country that spodumene concentrate reserves are maximum in the world, and Xinjiang and the Sichuan topmost production base that is lithium salts.The main employing concentrated sulfuric acid-calcium carbonate method refines lithium carbonate, and lithium slag is sulfuric acid process prepares the byproduct of lithium carbonate technique.Spodumene, after 1200 DEG C of high-temperature calcinations, adds concentrated sulfuric acid roasting, and through fully reacting, the acidifying material after acidifying, adds clear water wash water, and with solo flight powder (CaCO3) neutralization of waste acid, obtains slip.The leachate that obtains of slip leaching is for further processing, and remaining is leached mud lithium slag.
Lithium slag outward appearance is yellow-white, proportion 2.4 ~ 2.5g/cm3, and without the hydraulicity, containing certain moisture under natural drying, in Powdered after drying, particle is less, has the loose structure of larger internal surface area, has larger adsorption capacity to water.
Its chemical composition is similar to clayey, be mainly silica, aluminium oxide, calcium oxide and a small amount of sulfur trioxide etc., SiO2, Al2O3 in lithium slag absolutely greatly number exist with unbodied SiO2, Al2O3 form, thus have pozzolanic activity, but its activity is very low.Active in order to improve it, apply to better in building materials, usually by mechanical grinding to increase the fineness of lithium slag, improve its specific area, (specific surface of former slag is: be mainly 400m2/kg) that to advocate peace be needle-like and bar-shaped pattern on a small quantity with block and sheet to destroy lithium slag former slag.After lithium sizing is thin, makes blocky-shaped particle large in lithium slag and sheet-like particle by abundant fragmentation, add the contact area of lithium slag and alkaline solution, decrease the resistance that solution contacts with lithium solid impurity particle, improve the hydration rate of lithium slag.Therefore mechanical grinding lithium slag improves its active necessity existing.
Carrying out in lithium ground-slag grinding process at present, adopting ball mill to carry out, mill efficiency, to yield poorly, and energy consumption is higher.
And along with the develop rapidly of society, in the recovery and reuse technology of lithium slag, how effectively can improve the utilization rate of resource, energy-saving and cost-reducingly it is also proposed higher requirement.Therefore, research and develop and a kind ofly can make full use of resource and to reduce the production method of the vertical mill grinding lithium ground-slag of energy resource consumption imperative.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of lithium ground-slag that can utilize vertical mill direct grinding production high-quality, low energy consumption, simplifies production stage, improves the versatility of technique and corollary equipment simultaneously.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of production method of vertical mill grinding lithium ground-slag, and its innovative point is: described step is followed successively by vertical mill grinding lithium ground-slag step and vertical mill lithium ground-slag mill feed back closed cycle step;
vertical mill grinding lithium ground-slag step is:by lithium slag bank
factory buildingthe lithium slag of middle storage is sent into by crane
lithium slag charge storehouse, deliver into the main batch bin of lithium slag by conveyer, deliver to another conveyer through constant feeder; Deliver into the direct grinding of vertical mill by conveying worm again, obtain qualified lithium slag micropowder and underproof lithium ground-slag mill feed back; In vertical mill grinding process, control grinding roller pressure 10-12Mpa, hearth of hot-blast stove temperature 850-950C °, hot blast enters to grind temperature 310-360C °, goes out to grind temperature 90-96C °, and powder concentrator rotating speed 110-140r/min, enters to grind feeding capacity 66 ~ 68t/h, enters to grind air quantity 20*10
4-22*10
4m3/h;
vertical mill lithium ground-slag mill feed back closed cycle step is:lithium ground-slag mill feed back delivers to vertical mill top by an elevator, and the another one charging aperture sending into conveying worm entrance top vertical mill enters vertical mill grinding again.
Preferably, qualified lithium ground-slag is delivered to deduster by the powder concentrator in described vertical mill, is collected by deduster; The lithium ground-slag that described deduster is collected sends into No. two elevators by an air conveyer flume, delivers to top, powder storehouse by No. two elevators; By the automatic tee valve of No. two air conveyer flumes in top, powder storehouse, lithium ground-slag is delivered to corresponding lithium ground-slag storehouse.
Preferably, described deduster is air box impulse bag-type dust remover; Thermal current is delivered to chimney by the main exhaust fan of described air box impulse bag-type dust remover, enters vertical mill together with after large portion thermal current circulation loopback in chimney being mixed with the thermal current that hot-blast stove is sent, remainder by smoke stack emission in air.
Preferably, the lining board for grinding discs inclined angle of described vertical mill is 3 °, and mill and the grinding roller nip angle when milling is 5-6 °.
Preferably, described conveyer is belt conveyor.
Preferably, in Vertical Mill process, Real-Time Monitoring vertical mill mill vertical direction and horizontal direction amplitude, if vertical direction amplitude > is 2.3mm, during horizontal direction amplitude > 1.8mm, then carry out inside water spray to vertical mill, injection flow rate is at 0.6-2m
3/ h, until vertical direction amplitude < 2.3mm, horizontal direction amplitude < 1.8mm; In Vertical Mill process, the simultaneously hot blast temperature that enters of Real-Time Monitoring vertical mill, if hot blast temperature > 360 DEG C, then carry out inside to vertical mill and spray water, injection flow rate is at 0.6-2m
3/ h, until temperature < 360 DEG C.
The invention has the advantages that:
(1) adopting vertical mill to carry out in lithium slag grinding process, by controlling suitable grinding roller pressure and inner parameter, and then obtaining qualified lithium slag micropowder and underproof lithium ground-slag mill feed back; And send grinding feed back back to vertical mill as early as possible and carry out closed cycle, realize making full use of of resource;
(2) production method of the present invention, the output of lithium ground-slag reaches 62t/h, and lithium ground-slag specific area 420-460 ㎡/kg, meets national standard completely.Unit product power consumption: about lithium ground-slag reaches 28kwh/ ton, about the comprehensive power consumption of lithium ground-slag reaches 40kwh/ ton.
Accompanying drawing explanation
Fig. 1 is lithium ground-slag production technological process in the present invention.
Detailed description of the invention
As shown in Figure 1, lithium ground-slag production method: the lithium slag stored in mixing bank factory building, being driven a vehicle after lithium slag charge storehouse is grabbed in grab bucket by 20T is transferred on outer No. 16 belt conveyors of mixing bank factory building through No. 15 belt conveyors, enter the main batch bin of lithium slag, constant feeder is entered through threeway scraper-trough conveyer, carried by No. 17 belt conveyors after quantitative weighing
the charging aperture sending into vertical mill above conveying worm enters vertical mill and carries out grinding,grinding goes out qualified lithium ground-slag (i.e. lithium slag micropowder) and lithium ground-slag mill feed back;
Qualified lithium ground-slag is collected by air box impulse bag-type dust remover, No. two bucket elevators are delivered to by an air conveyer flume, powder bank top is delivered to by No. two bucket elevators, push up No. two air flumes through storehouse and be delivered to lithium ground-slag storehouse, lithium ground-slag storehouse enters the sale of dispatching from the factory in bulk of bottom of the reservior automobile bulk system by open-type inflatable box;
Lithium ground-slag mill feed back sends into a bucket elevator by No. 18 belt conveyors, delivers to vertical mill top, is fed in vertical mill above the defeated machine of helical feed
another one charging aperture enter vertical mill grinding again,grinding becomes qualified lithium ground-slag.
In the present embodiment, in vertical mill grinding lithium ground-slag step, the parameters controlling vertical mill is as follows:
| Product item title | Lithium ground-slag |
| Grinding roller pressure MPa | 10-12 |
| Hearth of hot-blast stove temperature C ° | 850-950 |
| Hot blast enters to grind temperature C ° | 310-360 |
| Go out to grind temperature C ° | 90-96 |
| Powder concentrator rotating speed r/min | 110-140 |
| Enter to grind feeding capacity t/h | 65~68 |
| Production t/h | 60 |
| Raw material moisture content % | 8-12 |
| Slagging-off iron % | 0.15 |
| Enter to grind air quantity 10 4m3/h | 20-22 |
In Vertical Mill process, Real-Time Monitoring vertical mill mill vertical direction and horizontal direction amplitude, if vertical direction amplitude > is 2.3mm, during horizontal direction amplitude > 1.8mm, then carry out inside water spray to vertical mill, injection flow rate is at 0.6-2m
3/ h, until vertical direction amplitude < 2.3mm, horizontal direction amplitude < 1.8mm; In Vertical Mill process, the simultaneously hot blast temperature that enters of Real-Time Monitoring vertical mill, if hot blast temperature > 360 DEG C, then carry out inside to vertical mill and spray water, injection flow rate is at 0.6-2m
3/ h, until temperature < 360 DEG C.
The present embodiment vertical mill selects the special vertical mill of FRMSG32.3 ground-slag of Xuzhou Fei Huang Heavy Machinery Plant and MCC Central Research Institute of Building and Construction Co., Ltd.'s R & D Cooperation.
Based on the lithium ground-slag production method of the present embodiment, product yield and comprehensive power consumption as shown in table 1 below:
Table 1
based on the lithium ground-slag production method of the present embodiment, lithium ground-slag technical indicator is as shown in table 2 below:
Table 2(presses YB/T4230-2010 technical requirement)
Vertical mill grinding lithium ground-slag and ball mill grinding lithium ground-slag power consumption is adopted to be compared as follows shown in table 3 for the present embodiment:
Table 3
conclusion: adopt vertical mill grinding lithium ground-slag of the present invention to compare conventional bead mill grinding, energy consumption and output have larger dominance, meanwhile, the fluctuation of its specific area is little, and quality is comparatively stable.
Claims (6)
1. a production method for vertical mill grinding lithium ground-slag, is characterized in that: described step is followed successively by vertical mill grinding lithium ground-slag step and vertical mill lithium ground-slag mill feed back closed cycle step;
vertical mill grinding lithium ground-slag step is:by lithium slag bank
factory buildingthe lithium slag of middle storage is sent into by crane
lithium slag charge storehouse, deliver into the main batch bin of lithium slag by conveyer, deliver to another conveyer through constant feeder; Deliver into the direct grinding of vertical mill by conveying worm again, obtain qualified lithium slag micropowder and underproof lithium ground-slag mill feed back; In vertical mill grinding process, control grinding roller pressure 10-12Mpa, hearth of hot-blast stove temperature 850-950C °, hot blast enters to grind temperature 310-360C °, goes out to grind temperature 90-96C °, and powder concentrator rotating speed 110-140r/min, enters to grind feeding capacity 66 ~ 68t/h, enters to grind air quantity 20*10
4-22*10
4m3/h;
vertical mill lithium ground-slag mill feed back closed cycle step is:lithium ground-slag mill feed back delivers to vertical mill top by an elevator, and the another one charging aperture sending into conveying worm entrance top vertical mill enters vertical mill grinding again.
2. the production method of vertical mill grinding lithium ground-slag according to claim 1, is characterized in that: qualified lithium ground-slag is delivered to deduster by the powder concentrator in described vertical mill, is collected by deduster; The lithium ground-slag that described deduster is collected sends into No. two elevators by an air conveyer flume, delivers to top, powder storehouse by No. two elevators; By the automatic tee valve of No. two air conveyer flumes in top, powder storehouse, lithium ground-slag is delivered to corresponding lithium ground-slag storehouse.
3. the production method of vertical mill grinding lithium ground-slag according to claim 2, is characterized in that: described deduster is air box impulse bag-type dust remover; Thermal current is delivered to chimney by the main exhaust fan of described air box impulse bag-type dust remover, enters vertical mill together with after large portion thermal current circulation loopback in chimney being mixed with the thermal current that hot-blast stove is sent, remainder by smoke stack emission in air.
4. the production method of the vertical mill grinding lithium ground-slag according to claim 1,2 or 3, is characterized in that: the lining board for grinding discs inclined angle of described vertical mill is 3 °, and mill and the grinding roller nip angle when milling is 5-6 °.
5. the production method of the vertical mill grinding lithium ground-slag according to claim 1,2 or 3, is characterized in that: described conveyer is belt conveyor.
6. the production method of vertical mill grinding lithium ground-slag according to claim 1, it is characterized in that: in Vertical Mill process, Real-Time Monitoring vertical mill mill vertical direction and horizontal direction amplitude, if vertical direction amplitude > is 2.3mm, during horizontal direction amplitude > 1.8mm, then carry out inside water spray to vertical mill, injection flow rate is at 0.6-2m
3/ h, until vertical direction amplitude < 2.3mm, horizontal direction amplitude < 1.8mm; In Vertical Mill process, the simultaneously hot blast temperature that enters of Real-Time Monitoring vertical mill, if hot blast temperature > 360 DEG C, then carry out inside to vertical mill and spray water, injection flow rate is at 0.6-2m
3/ h, until temperature < 360 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510595924.5A CN105214780A (en) | 2015-09-18 | 2015-09-18 | A kind of production method of vertical mill grinding lithium ground-slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510595924.5A CN105214780A (en) | 2015-09-18 | 2015-09-18 | A kind of production method of vertical mill grinding lithium ground-slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105214780A true CN105214780A (en) | 2016-01-06 |
Family
ID=54984245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510595924.5A Pending CN105214780A (en) | 2015-09-18 | 2015-09-18 | A kind of production method of vertical mill grinding lithium ground-slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105214780A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106076576A (en) * | 2016-07-01 | 2016-11-09 | 江苏融达新材料股份有限公司 | A kind of production method of ultra-fine lithium slag micropowder |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1119305A (en) * | 1966-03-07 | 1968-07-10 | Grace W R & Co | Method of preparing vermiculite pulp and paper prepared therefrom |
| CN100588462C (en) * | 2008-06-20 | 2010-02-10 | 张桂才 | Internal screening roller type vertical mill |
| 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 |
| CN103418484A (en) * | 2013-08-12 | 2013-12-04 | 江苏融达新材料股份有限公司 | Closed-loop feedback iron-selecting system for vertical mill |
| CN203389707U (en) * | 2013-07-10 | 2014-01-15 | 中冶建筑研究总院有限公司 | Vertical type roller mill for grinding steel slag |
| CN104291714A (en) * | 2014-06-13 | 2015-01-21 | 江苏融达新材料股份有限公司 | Production method for grinding steel-iron slag powder, mineral slag powder and steel slag powder by using vertical mill |
-
2015
- 2015-09-18 CN CN201510595924.5A patent/CN105214780A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1119305A (en) * | 1966-03-07 | 1968-07-10 | Grace W R & Co | Method of preparing vermiculite pulp and paper prepared therefrom |
| CN100588462C (en) * | 2008-06-20 | 2010-02-10 | 张桂才 | Internal screening roller type vertical mill |
| CN203389707U (en) * | 2013-07-10 | 2014-01-15 | 中冶建筑研究总院有限公司 | Vertical type roller mill for grinding steel slag |
| 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 |
| CN103418484A (en) * | 2013-08-12 | 2013-12-04 | 江苏融达新材料股份有限公司 | Closed-loop feedback iron-selecting system for vertical mill |
| CN104291714A (en) * | 2014-06-13 | 2015-01-21 | 江苏融达新材料股份有限公司 | Production method for grinding steel-iron slag powder, mineral slag powder and steel slag powder by using vertical mill |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106076576A (en) * | 2016-07-01 | 2016-11-09 | 江苏融达新材料股份有限公司 | A kind of production method of ultra-fine lithium slag micropowder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104291714B (en) | The production method of vertical mill grinding iron and steel ground-slag, slag powders and steel-making slag powder | |
| CN104307614A (en) | A method of grinding steel slag powder and mine slag powder and producing steel and iron slag powder by a vertical grinding mill | |
| CN103342482A (en) | External-circulation cement finish grinding system for vertical mill | |
| CN103801443A (en) | Active mineral waste residue powder production system and technological process thereof | |
| CN103386354A (en) | Production method of superfine slag powder | |
| CN107954622A (en) | A kind of production method of flyash, slag composite powder | |
| CN105195268A (en) | Production method for grinding lithium slag and mineral slag composite powder by means of vertical grinding machine | |
| CN103482848A (en) | Pelletizing production process for glass batch mixture | |
| CN208776332U (en) | The production technology device of vanadic anhydride | |
| CN204911641U (en) | Be applied to feeding device of upright mill | |
| CN201999951U (en) | Production device for three-dimensional steel slag micropowder | |
| CN106116196A (en) | A kind of vertical mill grinding slag, lithium slag composite powder production method | |
| CN202626235U (en) | Equipment for producing steel-making slag former by virtue of steel-making sludge | |
| CN106636670B (en) | A kind of lateritic nickel ore prepares the system and method for ferronickel | |
| CN105214780A (en) | A kind of production method of vertical mill grinding lithium ground-slag | |
| CN111298908A (en) | Production process for mixing and grinding steel slag, lithium slag, furnace slag and stone powder | |
| CN102719665B (en) | Process method for producing slag-forming agent for making steel by utilizing steel making sludge | |
| CN106116195A (en) | A kind of vertical mill grinding slag, lithium slag add modifying agent composite powder production method | |
| CN105217975A (en) | The production method of a kind of vertical mill grinding ferronickel slag, slag composite powder | |
| CN109136534A (en) | The method of powder containing navajoite and the baking mixed vanadium extraction of v-bearing steel slag | |
| CN104689898B (en) | A kind of slag milling control system of improved structure | |
| CN105214781A (en) | A kind of production method of vertical mill grinding ferronickel ground-slag | |
| CN206607285U (en) | Bone coal navajoite pelletizing and calcination reducing mechanism | |
| CN204342448U (en) | A kind of production system of bentonite sodium modification | |
| CN204022687U (en) | A kind of fully-automatic production unslaked lime powder unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160106 |
|
| RJ01 | Rejection of invention patent application after publication |