CN106987712A - Novel binders, carbonaceous pelletizing and the manufacture method of carbonaceous pelletizing are produced for copper tailings - Google Patents
Novel binders, carbonaceous pelletizing and the manufacture method of carbonaceous pelletizing are produced for copper tailings Download PDFInfo
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- CN106987712A CN106987712A CN201710306333.0A CN201710306333A CN106987712A CN 106987712 A CN106987712 A CN 106987712A CN 201710306333 A CN201710306333 A CN 201710306333A CN 106987712 A CN106987712 A CN 106987712A
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- binding agent
- carbonaceous pelletizing
- copper tailings
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- tailings
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
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- Chemical & Material Sciences (AREA)
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- Geochemistry & Mineralogy (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention is provided to novel binders, carbonaceous pelletizing and the manufacture method that copper tailings produces carbonaceous pelletizing, wherein, in terms of parts by weight, include 100 parts of copper tailings, 18 ~ 22 parts of reduction coal, 8 ~ 12 parts of lime stone, 2.5 ~ 3.5 parts of the first binding agent, the second binding agent 0.3 ~ 0.5 and the 3rd binding agent 0.03 ~ 0.05 for the carbonaceous pelletizing that copper tailings is produced.The present invention does not have particular requirement, 3 kinds of binding agent wide material sources to copper tailings and with low cost, technological operation is simple, the simple cost of device requirement is low, realizes full-automatic, and production capacity is big, saves cost；The carbonaceous pelletizing greater homogeneity of shaping is good, compression strength is big；The carbonaceous pelletizing of shaping is applied to rotary hearth furnace direct-reduction ~ mill ore magnetic selection technique productions Iron concentrate.
Description
Technical field
The present invention relates to binding agent, particularly a kind of novel binders that carbonaceous pelletizing is produced suitable for copper tailings.
Background technology
Containing the available element such as substantial amounts of iron, zinc in copper tailings, wherein TFe ~ 40%, Zn ~ 2% realizes that copper tailings is provided
Source, effectively reclaims valuable element in slag, significant to comprehensive development and utilization copper tailings.Research shows, copper tailings
Predominantly ferrosilicate and the ferriferous oxide phase of middle iron, include fayalite (2FeOSiO2), magnetic iron ore (Fe3O4) and without fixed
Shape vitreum etc., is difficult to handle using conventional ore dressing and smelting process.The mode that current copper tailings carries iron mainly has：Copper tailings
Direct ore dressing, which carries iron, copper tailings oxidation modification and carries iron, copper tailings fusing and reducing iron, the direct-reduction of copper tailings, carries iron etc..
The direct ore dressing of copper tailings carries iron, using traditional mill ore magnetic selection, and the rate of recovery of iron is low, and iron enters tail during magnetic separation
Ore deposit, it is impossible to obtain preferable recovery index；Copper tailings oxidation modification carries iron, using the addition CaO high-temperature roastings in the case where there is oxidizing atmosphere
Copper tailings, fayalite decomposition and inversion is Fe3O4, but oxidation modification roasting time is up to more than 2h, production cost is higher, warp
Ji is of poor benefits；Copper tailings fusing and reducing iron, under high-temperature molten-state, metallic iron is reduced into by the oxide of iron, production is accurate
Control, production safety require high, and reducing agent and flux consumption are big, and energy consumption and production cost are high.The direct-reduction of copper tailings carries iron,
Be by ferriferous oxide with reducing agent less than produce liquid iron at a temperature of be reduced into high-grade metallic iron.A large amount of technical studies
As a result show：Copper tailings is carried out to be reduced directly ~ mill ore magnetic selection PROCESS FOR TREATMENT, the metal iron powder that grade is more than 85% can be obtained, and
Iron recovery is more than 80%, and the technique is considered as more feasible, and the most possible technology for realizing heavy industrialization.
Copper tailings is reduced directly iron-extracting process, it is desirable to after copper tailings is uniformly mixed with reduction coal, lime stone, be made containing carbon ball
Group, it is desirable to which pelletizing drop strength, compression strength meet follow-up drying, direct-reduction technological process.But copper tailings is tail after flotation
Slag, surface hydrophilicity is poor, while the reduction coal of supplying, lime stone are also hydrophobic type material, it is difficult to use these three materials and make
Ball technique, produces carbonaceous pelletizing.According to China's metallurgy industry pellet production, addition conventional binders production carbonaceous pelletizing glues
Tie agent addition big, in globulation, the rate of return mine is up to 25 ~ 30%；In the drying process, reaction speed is slow, influences yield, increases
Energy consumption is added.Meanwhile, substantial amounts of binding agent is incorporated, raw material Iron grade is influenceed, a large amount of impurity components are brought into, the energy consumption of reduction is influenceed
And yield, big is influenceed on production cost, economic benefit.
The content of the invention
The problem of to solve the production carbonaceous pelletizing hardly possible shaping of copper tailings, overcome rotary hearth furnace direct-reduction ~ mill ore magnetic selection process
The problems such as middle carbonaceous pelletizing drop strength, compression strength, stable components, there is provided one on the premise of cost, reduction energy consumption is saved
Plant the novel binders that copper tailings produces carbonaceous pelletizing.
Specifically there is provided a kind of novel binders that carbonaceous pelletizing is produced suitable for copper tailings, in terms of parts by weight, bag
Include：First 2.5 ~ 3.5 parts of binding agent, the second binding agent 0.3 ~ 0.5 and the 3rd binding agent 0.03 ~ 0.05.
According to an aspect of the present invention, first binding agent, the second binding agent, the 3rd binding agent are respectively swelling
Soil, starch and caustic soda.
According to an aspect of the present invention, the ratio of first binding agent, the second binding agent and the 3rd binding agent is 3:
0.4:0.04 。
A kind of carbonaceous pelletizing produced for copper tailings, in terms of parts by weight, including 100 parts of copper tailings, reduction coal 18 ~ 22
Part, 8 ~ 12 parts of lime stone, 2.5 ~ 3.5 parts of the first binding agent, the second binding agent 0.3 ~ 0.5 and the 3rd binding agent 0.03 ~ 0.05.
According to an aspect of the present invention, first binding agent, the second binding agent, the 3rd binding agent are respectively swelling
Soil, starch and caustic soda.The ratio of first binding agent, the second binding agent and the 3rd binding agent is 3:0.4:0.04 .
A kind of preparation method of the carbonaceous pelletizing produced for copper tailings, comprises the following steps：
S1, dispensing：
By copper tailings, reduction coal, lime stone and the first binding agent according to mass ratio dispensing, match as 100:20:10:2.5~
3.5, obtain the first ingredient groups；
By the second binding agent, the 3rd binding agent and who according to mass ratio dispensing, match as 0.3 ~ 0.5:0.03~0.05:6, it is molten
Solution 20 ~ 40min of stirring, obtains the second mixture；
S2, the first ingredient groups and the second mixture sent into mixer, mix 2 ~ 4min, obtain the 3rd mixture；
S3, will the 3rd mixture send into pelletizer in produce wet carbonaceous pelletizing, dry.
According to an aspect of the present invention, the second binding agent, the dissolved stirring time of the 3rd binding agent are 30min in S1.
According to an aspect of the present invention, in S1, copper tailings is secondary tailings of the Copper making tailings after selecting copper, and granularity is
~ 200 mesh contents are more than 85%, and reduction coal, limestone granularity are that ~ 200 mesh contents are more than 70%.The average drop strength of carbonaceous pelletizing
For 4 times/（Individual 0.5m）, mean compressive strength is 20N/.
Compared with prior art, with following remarkable result：Three kinds of novel binders are used in mixed way by proportioning, and binding agent adds
Dosage is few, and micro-binder, which is dissolved in water, to be added, it is ensured that the uniformity that micro-binder is mixed with copper tailings；Carbonaceous pelletizing, it is real
The existing material such as copper tailings and lime stone, reduction coal is uniformly distributed, form microcellular structure between particle, improves follow-up direct-reduction effect
Really, the Iron concentrate rate of recovery is improved；The present invention does not have particular requirement, technological operation simple to the quality of copper tailings, realizes full-automatic
Change, production capacity is big, save cost, energy consumption is relatively low；The mixed material block greater homogeneity of shaping is good, compression strength is big.
Brief description of the drawings
Fig. 1 is the single conventional binders carbonaceous pelletizing index of addition.
Fig. 2 is the average drop strength index of carbonaceous pelletizing under different starch/caustic soda is matched.
Fig. 3 is carbonaceous pelletizing mean compressive strength index under different starch/caustic soda is matched.
Fig. 4 is the carbonaceous pelletizing mean compressive strength index under the caustic soda of 0.4% starch+0.04% proportioning.
Embodiment
In order to solve the above mentioned problem of prior art presence, applicant carried out in depth studying, find binding agent to containing
The performance impact of carbon pellets is very big, therefore, applicant has carried out in depth research and analysis to the property of binding agent.
Applicant is used in mixed way to break through with three kinds of binding agents, prepares carbonaceous pelletizing；By by three kinds of binding agents in proportion
Dispensing, is mixed with different addition manners with copper tailings.It is found by the applicant that：Binding agent amount of allocating is the 3.44% of copper tailings weight,
First binding agent, the second binding agent, the 3rd binding agent are respectively bentonite, starch and caustic soda, and mass ratio is 3:
0.4:When 0.04, it is few to bring impurity component into, and with preferable energy-saving effect, and cost is low.Final carbonaceous pelletizing, it is average
Drop strength 4 times/（Individual 0.5m）, mean compressive strength about 20N/, meet rotary hearth furnace direct-reduction ~ mill ore magnetic selection production iron
Fine powder.
By above-mentioned binding agent, a kind of carbonaceous pelletizing is obtained, in terms of parts by weight, is specifically included：100 parts of copper tailings, also
18 ~ 22 parts of raw coal, 8 ~ 12 parts of lime stone, 2.5 ~ 3.5 parts of the first binding agent, the second binding agent 0.3 ~ 0.5 and the 3rd binding agent
0.03~0.05。
The preparation method of above-mentioned carbonaceous pelletizing is as follows：
It is copper tailings first and reduction coal, lime stone, bentonite dispensing in proportion, caustic soda, starch add water after dispensing molten in proportion
Solution stirring, after 6 kinds of material feeding intensive mixers are mixed, is produced after carbonaceous pelletizing, low temperature drying for turning bottom with disc balling machine
Stove direct-reduction ~ mill ore magnetic selection production Iron concentrate.
Specifically, the substantially process of this method is as follows.
S1, by copper tailings, reduction coal, lime stone, the first binding agent dispensing in proportion, match as 100:20:10:2.5~
3.5。
By the second binding agent, the 3rd binding agent, water dispensing in proportion, dissolving 20 ~ 40min of stirring is matched as 6:0.3~
0.5:0.03~0.05。
S2, by after proportioning material send into intensive mixer, 2 ~ 4min of mixing time；
S3, will obtained mixture send into pelletizer in produce wet carbonaceous pelletizing；
S4, obtained carbonaceous pelletizing carried out after low temperature drying, Iron concentrate is produced for rotary hearth furnace direct-reduction ~ mill ore magnetic selection.
It is preferred that, the first binding agent is bentonite, and amount of allocating is the 3% of copper tailings weight.Second binding agent is starch, amount of allocating
For the 0.4% of copper tailings weight.3rd binding agent is caustic soda, and amount of allocating is the 0.04% of copper tailings weight.Second binding agent, the 3rd
Binding agent dissolved stirring time is 30min.In S2, each material sends into intensive mixer, mixing time 3min.What is obtained in S2 contains
Carbon pellets are spherical, and particle diameter is 8 ~ 16mm.
Embodiment 1：Copper tailings, reduction coal, lime stone, bentonite dispensing in proportion are matched for 100:20:10:3.5；
Starch, caustic soda, water dispensing in proportion, dissolving stirring 30min, are matched as 0.5:0.05:6；Material feeding strength after proportioning is mixed
Conjunction machine, mixing time 3min；Wet carbonaceous pelletizing, the average drop strength 5.10 of carbonaceous pelletizing are produced in mixture feeding pelletizer
Secondary/（Individual 0.5m）, mean compressive strength about 16.5N/.
Embodiment 2：Copper tailings, reduction coal, lime stone, bentonite dispensing in proportion are matched for 100:20:10:3；Form sediment
Powder, caustic soda, water dispensing in proportion, dissolving stirring 30min, are matched as 0.4:0.04:6；Material feeding strength after proportioning is mixed
Machine, mixing time 3min；Wet carbonaceous pelletizing is produced in mixture feeding pelletizer, the average drop strength of carbonaceous pelletizing 4.40 times/
（Individual 0.5m）, mean compressive strength about 21.1N/, meet production requirement.
Embodiment 3：Copper tailings, reduction coal, lime stone, bentonite dispensing in proportion are matched for 100:20:10:2.5；
Starch, caustic soda, water dispensing in proportion, dissolving stirring 30min, are matched as 0.3:0.03:6；Material feeding strength after proportioning is mixed
Conjunction machine, mixing time 3min；Wet carbonaceous pelletizing, the average drop strength 3.75 of carbonaceous pelletizing are produced in mixture feeding pelletizer
Secondary/（Individual 0.5m）, mean compressive strength about 24N/.
As shown in figure 1, the single conventional binders of contrast addition（Bentonite）Carbonaceous pelletizing is produced, carbonaceous pelletizing index is shown in figure
1.Understand, carbonaceous pelletizing drop strength is low, be unsatisfactory for requiring.
As shown in Figures 2 and 3, under different starch+caustic soda proportioning, with the increase of bentonite consumption, the performance of carbonaceous pelletizing
Index is changed.It can be seen that carbonaceous pelletizing intensity increases with starch+caustic soda proportioning, drop strength is in obvious rising
Trend, compression strength is in slow downward trend, and three kinds of binding agents improve bright with the use of synergy, carbonaceous pelletizing intensity is produced
It is aobvious.
Such as Fig. 4, under the caustic soda of 0.4% starch+0.04% proportioning, with the increase of bentonite consumption, the performance of carbonaceous pelletizing refers to
Mark is changed.Understand, carbonaceous pelletizing intensity increases with bentonite ore ratio, drop strength is in obvious ascendant trend, 0.4%
Under the bentonite ore ratio of the caustic soda of starch+0.04%+3%, average drop strength reach 4.4 times/（Individual 0.5m）；Compression strength is in slow
Downward trend, under the bentonite ore ratio of+0.04% caustic soda of 0.4% starch+3%, mean compressive strength about 21.1N/ meets production
It is required that.
Schematically binding agent of the present invention and embodiments thereof are described above, the description does not have restricted, it is real
The structure on border is not limited thereto.So, if one of ordinary skill in the art is enlightened by it, do not departing from the invention
In the case of objective, the frame mode similar to the technical scheme and embodiment are designed without creative, this all should be belonged to
The protection domain of invention.
Claims (10)
1. the novel binders of carbonaceous pelletizing are produced for copper tailings, it is characterised in that in terms of parts by weight, including：First glues
Tie 2.5 ~ 3.5 parts of agent, the second binding agent 0.3 ~ 0.5 and the 3rd binding agent 0.03 ~ 0.05.
2. the novel binders of carbonaceous pelletizing are produced suitable for copper tailings as claimed in claim 1, it is characterised in that described the
One binding agent, the second binding agent, the 3rd binding agent are respectively bentonite, starch and caustic soda.
3. the novel binders of carbonaceous pelletizing are produced suitable for copper tailings as claimed in claim 1, it is characterised in that described the
The ratio of one binding agent, the second binding agent and the 3rd binding agent is 3:0.4:0.04 .
4. it is a kind of for copper tailings produce carbonaceous pelletizing, it is characterised in that in terms of parts by weight, including 100 parts of copper tailings, also
18 ~ 22 parts of raw coal, 8 ~ 12 parts of lime stone, 2.5 ~ 3.5 parts of the first binding agent, the second binding agent 0.3 ~ 0.5 and the 3rd binding agent
0.03~0.05 。
5. the carbonaceous pelletizing produced as claimed in claim 4 for copper tailings, it is characterised in that first binding agent, the
Two binding agents, the 3rd binding agent are respectively bentonite, starch and caustic soda.
6. the carbonaceous pelletizing produced as claimed in claim 4 for copper tailings, it is characterised in that first binding agent, the
The ratio of two binding agents and the 3rd binding agent is 3:0.4:0.04 .
7. it is used for the preparation method for the carbonaceous pelletizing that copper tailings is produced described in any one of claim 4 to 6, it is characterised in that
Comprise the following steps：
S1, dispensing：
By copper tailings, reduction coal, lime stone and the first binding agent according to mass ratio dispensing, match as 100:20:10:2.5~
3.5, obtain the first ingredient groups；
By the second binding agent, the 3rd binding agent and who according to mass ratio dispensing, match as 0.3 ~ 0.5:0.03~0.05:6, it is molten
Solution 20 ~ 40min of stirring, obtains the second mixture；
S2, the first ingredient groups and the second mixture sent into mixer, mix 2 ~ 4min, obtain the 3rd mixture；
S3, will the 3rd mixture send into pelletizer in produce wet carbonaceous pelletizing, dry.
8. preparation method according to claim 7, it is characterised in that the second binding agent, the dissolving of the 3rd binding agent in S1
Mixing time is 30min.
9. preparation method according to claim 7, it is characterised in that in S1, copper tailings is Copper making tailings after selecting copper
Secondary tailings, granularity be ~ 200 mesh contents be more than 85%, reduction coal, limestone granularity be ~ 200 mesh contents be more than 70%.
10. preparation method according to claim 7, it is characterised in that the average drop strength of carbonaceous pelletizing is 4 times/（It is individual
▪ 0.5m）, mean compressive strength is 20N/.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710306333.0A CN106987712A (en) | 2017-05-04 | 2017-05-04 | Novel binders, carbonaceous pelletizing and the manufacture method of carbonaceous pelletizing are produced for copper tailings |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710306333.0A CN106987712A (en) | 2017-05-04 | 2017-05-04 | Novel binders, carbonaceous pelletizing and the manufacture method of carbonaceous pelletizing are produced for copper tailings |
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| CN106987712A true CN106987712A (en) | 2017-07-28 |
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| CN201710306333.0A Pending CN106987712A (en) | 2017-05-04 | 2017-05-04 | Novel binders, carbonaceous pelletizing and the manufacture method of carbonaceous pelletizing are produced for copper tailings |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107974558A (en) * | 2017-10-24 | 2018-05-01 | 江苏省冶金设计院有限公司 | Binding agent, carbonaceous pelletizing for producing carbonaceous pelletizing and preparation method thereof |
| CN108504857A (en) * | 2018-03-20 | 2018-09-07 | 佛山科学技术学院 | A kind of preparation method of low Iron grade carbonaceous pelletizing cold bound pellet |
| CN109161681A (en) * | 2018-09-27 | 2019-01-08 | 攀钢集团攀枝花钢铁研究院有限公司 | The preparation method of vanadium slag sodium pelletizing |
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| CN105907958A (en) * | 2016-05-10 | 2016-08-31 | 江苏省冶金设计院有限公司 | Composite binder and application of composite binder to water-bearing copper slag pelletizing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107974558A (en) * | 2017-10-24 | 2018-05-01 | 江苏省冶金设计院有限公司 | Binding agent, carbonaceous pelletizing for producing carbonaceous pelletizing and preparation method thereof |
| CN108504857A (en) * | 2018-03-20 | 2018-09-07 | 佛山科学技术学院 | A kind of preparation method of low Iron grade carbonaceous pelletizing cold bound pellet |
| CN109161681A (en) * | 2018-09-27 | 2019-01-08 | 攀钢集团攀枝花钢铁研究院有限公司 | The preparation method of vanadium slag sodium pelletizing |
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