CN105217975A - The production method of a kind of vertical mill grinding ferronickel slag, slag composite powder - Google Patents

The production method of a kind of vertical mill grinding ferronickel slag, slag composite powder Download PDF

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Publication number
CN105217975A
CN105217975A CN201510596339.7A CN201510596339A CN105217975A CN 105217975 A CN105217975 A CN 105217975A CN 201510596339 A CN201510596339 A CN 201510596339A CN 105217975 A CN105217975 A CN 105217975A
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China
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slag
vertical mill
ferronickel
grinding
composite powder
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CN201510596339.7A
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Chinese (zh)
Inventor
张贤清
杨亮
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江苏融达新材料股份有限公司
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Priority to CN201510596339.7A priority Critical patent/CN105217975A/en
Publication of CN105217975A publication Critical patent/CN105217975A/en

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Abstract

The present invention relates to the production method of a kind of vertical mill grinding ferronickel slag, slag composite powder, it is characterized in that: the slag that the ferronickel slag obtained except metal preparation step through ferronickel slag and slag obtain except metal preparation step is mixed by respective constant feeder by the part by weight of ferronickel slag with slag component 1.5 ~ 2:8.5 ~ 8 respectively, then send into the direct grinding of vertical mill after spraying grinding aid reinforcing agent.The invention has the advantages that: by carrying out pre-treatment to ferronickel slag and slag, proportionally add a certain amount of enhancing grinding aid after proportioning and enter domestic vertical mill, and coordinate the direct grinding of corresponding equipment and process parameter to produce ferronickel slag composite powder, simplify the production stage of traditional nickel Iron-ore Slag composite powder, improve ferronickel, slag composite powder uniformity coefficient, reduce production energy consumption and cost.

Description

The production method of a kind of vertical mill grinding ferronickel slag, slag composite powder

Technical field

The present invention relates to the production method of a kind of vertical mill grinding ferronickel slag, slag composite powder.

Background technology

Nickel slag also claims ferronickel slag, nickel-iron smelting slag etc., and the solid slag produced when being smelting ferronickel alloy, can be divided into dry slag and grain slag by its form, can be divided into nickelic slag and low nickel slag by its nickel content height.

In recent years, along with laterite pyrometallurgical smelting Rhometal scale progressively expands, the quantity discharged of smelting ferronickel from red soil nickel ore waste residue (being called for short ferronickel slag) increases gradually.Compared with other metallurgical slag, ferronickel slag valuable metal recovery is worth low, and bed drain purge is large, progressively becomes a great problem of metallurgical slag process.Banking up and landfill of a large amount of electrosmelting ferronickel slag, not only land occupation, contaminate environment, the Sustainable development of returning nickel-iron smelting brings severe challenge.So nickel-iron smelting industry " outlet " problem be badly in need of as solving nickel-iron smelting slag carries out the comprehensive utilizating research of scientific system.

All containing a certain amount of Rhometal particle in the waste residue of nickel-iron smelting, Rhometal price is higher, and therefore, the Rhometal reclaimed in ferronickel slag becomes a strong event that investment is little, income is fast.The ratio of Rhometal is great, and the proportion of ferronickel slag is little, utilizes the method for gravity treatment effectively can reclaim Rhometal particle wherein.And reclaimed hardly containing any recycling metal in the ferronickel slag after metal, the solid slag that therefore this part of nickel scum can be real at last, it can be used as raw material or the additive of building material.

The now existing application adopting ferronickel ground-slag to be used as cement mixture and concrete admixture, but carrying out, in ferronickel ground-slag or ferronickel slag, slag composite powder grinding process, adopting ball mill to carry out at present, mill efficiency, yields poorly, and energy consumption is higher.

And along with the develop rapidly of society, in the recovery and reuse technology of ferronickel slag, how effectively can improve the utilization ratio 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 ferronickel ground-slag of energy consumption imperative.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of production method that can utilize vertical mill direct grinding production high-quality, less energy-consumption ferronickel, slag composite powder.

For solving the problems of the technologies described above, technical scheme of the present invention is: the production method of a kind of vertical mill grinding ferronickel slag, slag composite powder, and its innovative point is: pre-treatment:by ferronickel slag and slag except the slag that metal preparation step obtains enters the secondary batch bin of ferronickel slag and the main batch bin of slag respectively; preparation mixing slag:mixed by respective constant feeder by the part by weight of ferronickel slag with slag component 1 ~ 1.5:9 ~ 8.5, after the grinding aid reinforcing agent of spray ferronickel slag, slag total amount 0.1%wt-0.15%wt, enter worm conveyor again, then send into the direct grinding of vertical mill by worm conveyor; vertical Mill: control the grinding roller pressure of vertical mill at 12.5-13.5MPa, the lining board for grinding discs inclined angle of vertical mill is 3 °, and mill and the grinding roller gripping angle when milling is 5-6 °, and hot blast enters vertical mill temperature 315-348 DEG C, and air quantity is at 20*10 4-22*10 4m 3/ h, hot blast goes out vertical mill temperature 85-95 DEG C, and the powder separating machine rotating speed of vertical mill, at 142-146r/min, obtains qualified ferronickel, slag composite powder and underproof ferronickel, slag compound grinding feed back; And in Vertical Mill process, Real-Time Monitoring vertical mill mill vertical direction and horizontal direction amplitude, if vertical direction amplitude > is 2.5mm, during horizontal direction amplitude > 2mm, then carry out inside water spray to vertical mill, injection flow rate is at 0.8-0.9m 3/ h, until vertical direction amplitude < 2.5mm, horizontal direction amplitude < 2mm; In Vertical Mill process, the hot blast temperature simultaneously entered in Real-Time Monitoring vertical mill, at ferronickel slag and slag component ratio 1/9 ~ 22/153 time, if the hot blast temperature > entered 348 DEG C, then will carry out inside water spray to vertical mill, injection flow rate is at 0.8-0.9m 3/ h, until temperature < 348 DEG C; At ferronickel slag and slag component ratio 22/153 ~ 3/17 time, if the hot blast temperature > entered 328 DEG C, then will carry out inside water spray to vertical mill, injection flow rate is at 0.8-0.9m 3/ h, until temperature < 328 DEG C.

Preferably, described vertical mill produces underproof ferronickel, slag compound grinding feed back carry out iron removal by magnetic separation closed cycle step: ferronickel, slag compound grinding feed back are successively through No. three self-discharging type electric-magnetic iron removers, a dry powder permanent-magnet drum type magnetic separator iron removal by magnetic separation, vertical mill top is delivered to again by a lift, through vibrating feed machine vibration cloth, the bed thickness of cloth is less than 20mm, bed of material width is identical with No. two dry powder permanent-magnet drum type magnetic separator magnetic rollers, enter No. two dry powder permanent-magnet drum type magnetic separators again after iron removal by magnetic separation, the another one opening for feed sending into worm conveyor entrance top vertical mill enters vertical mill grinding again.

Preferably, described slag is except metal preparation step: by slag bank factory buildingthe slag of middle storage is sent into by lifting machine slag feed bincarried by transfer roller, and carry out deironing through a self-discharging type electric-magnetic iron remover, metal detector, except entering vibratory screening apparatus without after magnetic metal, the slag being less than Vibration Screen screen distance enters the main batch bin of slag, transfer roller is delivered to, by No. two self-discharging type electric-magnetic iron remover deironing again through constant feeder.

The invention has the advantages that: the present invention is by carrying out pre-treatment to ferronickel slag and slag, proportionally add a certain amount of enhancing grinding aid after proportioning and enter domestic vertical mill, and coordinate the direct grinding of corresponding equipment and process parameter to produce ferronickel slag composite powder, simplify the production stage of traditional nickel Iron-ore Slag composite powder, improve ferronickel, slag composite powder uniformity coefficient, reduce production energy consumption and cost.Production method of the present invention is conducive to adopting same vertical mill separate compiling ferronickel ground-slag, slag powders and ferronickel slag composite powder to realize resource reclaim recycling, realize public most equipment, substantially increase the utilization ratio of equipment and resource, reduce Engineering Project and cost of goods manifactured.

Production method of the present invention, ferronickel, the slag composite powder output of production reach more than 58t/h, ferronickel, slag composite powder specific surface area > 400m 2/ kg, meets national standard completely.Unit product power consumption: ferronickel, slag composite powder reach about 28kwh/t.About ferronickel, the comprehensive power consumption of slag composite powder reach 40kwh/ ton.

Accompanying drawing explanation

Fig. 1 is the production method process flow sheet of vertical mill grinding ferronickel slag of the present invention, slag composite powder.

Embodiment

As shown in Figure 1, in the present invention in vertical mill grinding ferronickel slag, slag composite powder technique, need to carry out except metal preparation slag.

Slag is except metal preparation: the slag stored in mixing bank factory building, and being driven a vehicle after slag feed bin is grabbed in grab bucket by 20T is transferred on outer No. 16 rotary conveyors of mixing bank factory building through No. 15 rotary conveyors, carries out through a self-discharging type electric-magnetic iron remover a deironing, then after metal detector detection, enter electricity to surge abrasion-proof scraper-trough conveyer onesecondary to without after magnetic metal, through cone shaker, broken to the slag without fragmentation, the mesh size of cone shaker is 80mm, and the slag filtering out particle diameter < 80mm enters the main batch bin of slag, and the slag of particle diameter>=80mm delivers to windrow storehouse from vibratory screening apparatus by-pass line, again use tramp iron separator deironing after fragmentation, slag charge is reuse again, and slag iron enters slag iron storehouse, and the slag of≤80mm enters the main batch bin of slag.

Ferronickel slag: the ferronickel slag stored in mixing bank factory building, is driven a vehicle after ferronickel slag charge storehouse is grabbed in grab bucket by 20T and is transferred to the secondary batch bin of ferronickel slag through No. 19 rotary conveyors.

Preparation mixing slag:

Secondary for ferronickel slag batch bin is delivered on No. 17 rotary conveyors by No. two constant feeders, slag is sent on No. 17 rotary conveyors by a constant feeder from the main batch bin of slag, and the part by weight that operational throughput presses ferronickel slag and slag component 1 ~ 1.5:9 ~ 8.5 is prepared.

Ferronickel slag, slag are through No. two self-discharging type electric-magnetic iron remover deironing again, then the enhancing grinding aid of ferronickel, slag total amount 0.1%wt-0.15%wt is sprayed, this enhancing grinding aid adopts the enhancing grinding aid of Shanghai Ai Si get Rui building materials company limited, its name of product model: smartv8-A.

Send into vertical mill by worm conveyor after spray grinding aid and carry out grinding,

In vertical mill grinding ferronickel, slag composite powder process, control the grinding roller pressure of vertical mill at 12.5-13.5MPa, hot blast enters vertical mill temperature 315-348 DEG C, and air quantity is at 20*10 4-22*10 4m 3/ h, hot blast goes out vertical mill temperature 85-95 DEG C, and the powder separating machine rotating speed of vertical mill is at 142-146r/min.

In Vertical Mill process, Real-Time Monitoring vertical mill mill vertical direction and horizontal direction amplitude, if vertical direction amplitude > is 2.5mm, during horizontal direction amplitude > 2mm, then carry out inside water spray to vertical mill, injection flow rate is at 0.8-0.9m 3/ h, until vertical direction amplitude < 2.5mm, horizontal direction amplitude < 2mm; In Vertical Mill process, the hot blast temperature simultaneously entered in Real-Time Monitoring vertical mill, at ferronickel slag and slag component ratio 1/9 ~ 22/153 time, if the hot blast temperature > entered 348 DEG C, then will carry out inside water spray to vertical mill, injection flow rate is at 0.8-0.9m 3/ h, until temperature < 348 DEG C; At ferronickel slag and slag component ratio 22/153 ~ 3/17 time, if the hot blast temperature > entered 328 DEG C, then will carry out inside water spray to vertical mill, injection flow rate is at 0.8-0.9m 3/ h, until temperature < 328 DEG C.

Meanwhile, vertical mill internal structure is adjusted: the lining board for grinding discs angle of vertical mill is 3 °, and the angle of roller shell axis and horizontal plane is 15 °, and mill and the grinding roller gripping angle when milling is 5-6 °.In the present embodiment, vertical mill grinding ferronickel slag, slag composite powderin step, the parameters controlling vertical mill is as follows:

Qualified ferronickel, slag composite powder and underproof ferronickel, slag compound grinding feed back is obtained after above-mentioned Vertical Mill.

Qualified ferronickel, slag composite powder are collected by sack cleaner, deliver to No. two chapelets by an air conveyer flume, deliver to powder bank top by No. two chapelets, push up No. two air flumes be delivered to ferronickel, slag composite powder storehouse through storehouse; Ferronickel, slag composite powder storehouse enter by open-type inflatable box that bottom of the reservior automobile bulk system is in bulk to dispatch from the factory.

Underproof ferronickel, slag compound grinding feed back is sent into No. three self-unloading electric magnetic iron removers by No. 18 rotary conveyors and is carried out a deironing, slag iron enters slag iron storehouse, feed back after a deironing is sent into a dry powder permanent-magnet drum type magnetic separator and is carried out secondary deironing, slag iron storehouse sent into by the slag iron be separated, a chapelet sent into by secondary deironing feed back, deliver to vertical mill top, by aerodynamic side threeway scraper-trough conveyer, feed back is sent into oscillating feeder again, through vibrating feed machine vibration cloth, the bed thickness of cloth is less than 20mm, bed of material width is identical with No. two dry powder permanent-magnet drum type magnetic separator magnetic rollers, after three deironing of No. two dry powder permanent-magnet drum type magnetic separators, be fed in vertical mill above the defeated machine of helical feed another one opening for feed enter vertical mill grinding again,grinding becomes qualified ferronickel, slag composite powder, and slag iron storehouse sent into by the slag iron of separation.

Table 1

based on ferronickel, the slag composite powder production method of the present embodiment, its technical indicator presses iron and steel ground-slag standard, and technical indicator is as shown in table 2.

Table 2

In the present embodiment, the ferronickel of production, slag composite powder output reaches 58 ~ 62t/h,ferronickel, slag composite powder specific surface area > 400m 2/ kg, meets national standard completely.Unit product power consumption: ferronickel, slag composite powder reach 28 kwh/tleft and right.About ferronickel, the comprehensive power consumption of slag composite powder reach 40kwh/ ton.

Claims (3)

1. a production method for vertical mill grinding ferronickel slag, slag composite powder, is characterized in that:
pre-treatment:by ferronickel slag and slag except the slag that metal preparation step obtains enters the secondary batch bin of ferronickel slag and the main batch bin of slag respectively;
preparation mixing slag:mixed by respective constant feeder by the part by weight of ferronickel slag with slag component 1 ~ 1.5:9 ~ 8.5, after the grinding aid reinforcing agent of spray ferronickel slag, slag total amount 0.1%wt-0.15%wt, enter worm conveyor again, then send into the direct grinding of vertical mill by worm conveyor;
vertical Mill: control the grinding roller pressure of vertical mill at 12.5-13.5MPa, the lining board for grinding discs inclined angle of vertical mill is 3 °, and mill and the grinding roller gripping angle when milling is 5-6 °, and hot blast enters vertical mill temperature 315-348 DEG C, and air quantity is at 20*10 4-22*10 4m 3/ h, hot blast goes out vertical mill temperature 85-95 DEG C, and the powder separating machine rotating speed of vertical mill, at 142-146r/min, obtains qualified ferronickel, slag composite powder and underproof ferronickel, slag compound grinding feed back;
And in Vertical Mill process, Real-Time Monitoring vertical mill mill vertical direction and horizontal direction amplitude, if vertical direction amplitude > is 2.5mm, during horizontal direction amplitude > 2mm, then carry out inside water spray to vertical mill, injection flow rate is at 0.8-0.9m 3/ h, until vertical direction amplitude < 2.5mm, horizontal direction amplitude < 2mm; In Vertical Mill process, the hot blast temperature simultaneously entered in Real-Time Monitoring vertical mill, at ferronickel slag and slag component ratio 1/9 ~ 22/153 time, if the hot blast temperature > entered 348 DEG C, then will carry out inside water spray to vertical mill, injection flow rate is at 0.8-0.9m 3/ h, until temperature < 348 DEG C; At ferronickel slag and slag component ratio 22/153 ~ 3/17 time, if the hot blast temperature > entered 328 DEG C, then will carry out inside water spray to vertical mill, injection flow rate is at 0.8-0.9m 3/ h, until temperature < 328 DEG C.
2. the production method of vertical mill grinding ferronickel slag according to claim 1, slag composite powder, is characterized in that: the underproof ferronickel that described vertical mill produces, slag compound grinding feed back carry out iron removal by magnetic separation closed cycle step:
Ferronickel, slag compound grinding feed back are successively through No. three self-discharging type electric-magnetic iron removers, a dry powder permanent-magnet drum type magnetic separator iron removal by magnetic separation, vertical mill top is delivered to again by a lift, through vibrating feed machine vibration cloth, the bed thickness of cloth is less than 20mm, bed of material width is identical with No. two dry powder permanent-magnet drum type magnetic separator magnetic rollers, enter No. two dry powder permanent-magnet drum type magnetic separators again after iron removal by magnetic separation, the another one opening for feed sending into worm conveyor entrance top vertical mill enters vertical mill grinding again.
3. the production method of vertical mill grinding ferronickel slag according to claim 1, slag composite powder, is characterized in that: described slag is except metal preparation step: by slag bank factory buildingthe slag of middle storage is sent into by lifting machine slag feed bincarried by transfer roller, and carry out deironing through a self-discharging type electric-magnetic iron remover, metal detector, except entering vibratory screening apparatus without after magnetic metal, the slag being less than Vibration Screen screen distance enters the main batch bin of slag, transfer roller is delivered to, by No. two self-discharging type electric-magnetic iron remover deironing again through constant feeder.
CN201510596339.7A 2015-09-18 2015-09-18 The production method of a kind of vertical mill grinding ferronickel slag, slag composite powder CN105217975A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107032717A (en) * 2016-11-17 2017-08-11 盐城工学院 Nickel slag slag based cementitious material, its preparation method and application
CN107746902A (en) * 2017-09-30 2018-03-02 日照钢铁控股集团有限公司 Ferro-alloy cinder integrated conduct method

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CN103145355A (en) * 2013-03-04 2013-06-12 内蒙古包钢钢联股份有限公司 Production method of nickel slag composite portland cement
CN203494622U (en) * 2013-08-12 2014-03-26 江苏融达新材料股份有限公司 Vertical mill feedback closed-cycle iron selection system
CN103771739A (en) * 2014-01-13 2014-05-07 山东炜烨新型建材有限公司 Nickel iron slag micropowder and preparation method thereof
CN103936315A (en) * 2014-03-31 2014-07-23 江苏融达新材料股份有限公司 Preparation method of modified active slag powder
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
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

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Publication number Priority date Publication date Assignee Title
CN101418356A (en) * 2007-10-28 2009-04-29 沾化庆翔金属材料有限公司 A kind of from nickel oxide ore the method for refining ferronickel alloy
CN103145355A (en) * 2013-03-04 2013-06-12 内蒙古包钢钢联股份有限公司 Production method of nickel slag composite portland cement
CN203494622U (en) * 2013-08-12 2014-03-26 江苏融达新材料股份有限公司 Vertical mill feedback closed-cycle iron selection system
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* Cited by examiner, † Cited by third party
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CN107032717A (en) * 2016-11-17 2017-08-11 盐城工学院 Nickel slag slag based cementitious material, its preparation method and application
CN107032717B (en) * 2016-11-17 2019-03-05 盐城工学院 Nickel slag-slag based cementitious material, preparation method and application
CN107746902A (en) * 2017-09-30 2018-03-02 日照钢铁控股集团有限公司 Ferro-alloy cinder integrated conduct method

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Application publication date: 20160106