CN103964709A - Recycling method for baghouse aluminum dust and aluminum metal smelting slag - Google Patents
Recycling method for baghouse aluminum dust and aluminum metal smelting slag Download PDFInfo
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- CN103964709A CN103964709A CN201310046708.6A CN201310046708A CN103964709A CN 103964709 A CN103964709 A CN 103964709A CN 201310046708 A CN201310046708 A CN 201310046708A CN 103964709 A CN103964709 A CN 103964709A
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Abstract
The invention provides a recycling method for baghouse aluminum dust and aluminum metal smelting slag. The method comprises the following steps: processing slag particles from aluminum metal smelting slag; allowing the particle size of the slag particles to be greater than 200 meshes and less than 400 meshes; mixing slag particles according with conditions with an aqueous solution of a binder so as to form a blank material; pressurizing and molding the blank material to form a crude green body of a refractory material; and sintering the crude green body of the refractory material at an operating temperature of 1050 to 1450 DEG C and carrying out cooling so as to form the refractory material. Thus, the particle size of the slag particles can be controlled, nitrogen content in the slag particles is effectively reduced, and the phenomenon of escape of ammonia gas due to a reaction of water with aluminum nitride can be effectively reduced after mixing of the slag particles with the aqueous solution of the binder, so the phenomenon of cracking or explosion of the crude green body of the refractory material or the refractory material can be reduced, thereby achieving the effects of low making cost and good surface fineness of the refractory material.
Description
Technical field
The present invention has about a kind of aluminium dust-collector and aluminum metal smelted furnace cinder recycling method; refer to especially a kind of particle diameter of controlling slag granules; the nitrogen content of slag granules is effectively reduced; and when this slag granules is mixed after the cakingagent aqueous solution; can effectively reduce the phenomenon of reacting effusion ammonia because of water with aluminium nitride; to reduce be full of cracks or the Decrepitation Phenomena of the thick embryo of refractory materials or refractory materials, and reach effect that cost of manufacture is cheap and refractory surface fineness is good.
Background technology
In the fusion process of aluminium, can produce slag, include oxide compound and the nitride of aluminium in slag, wherein nitride can react with moisture in damp atmosphere or rainwater and forms ammonia and escape, and therefore undressed slag has impact to a certain degree to environment.
No. 583155th, TaiWan, China patent of invention, disclose a kind of by the method for aluminium slag ash recycling, mainly that after the sorting of aluminium metallurgy slag is reclaimed to metallic aluminium, remaining aluminium slag ash waste is calcined, make the raw material of refractory materials, to reach aluminium slag ash resource utilization object, and create higher economic worth; Its method is to utilize high temperature kiln to be sintered into the material of main component for aluminum oxide (crystallizable mineral is corundum mutually) aluminium slag ash, with as raw material for refractory, not only can effectively solve the problem of aluminium slag ash offal treatment, and can save the waste of producing the refractory materials energy and avoiding resource.
No. 583155th, above-mentioned TaiWan, China patent of invention, although aluminium slag ash can be treated as to the raw material of refractory brick, refractory mortar, mould material, does not give exposure completely for product yield how to make refractory brick and how to guarantee to make in refractory brick process.
In addition, " mining and metallurgy " periodical that the Republic of China publishes in March, 100, wherein the 51st page publication has " aluminium metallurgy slag is the research that raw material is made refractory materials ", wherein disclose the production method of refractory materials for aluminium metallurgy slag (particle diameter is between 100-200 mesh) is puddled with the cakingagent aqueous solution (carboxymethyl cellulose aqueous solution) according to proportioning, make refractory materials via single shaft pressurization (20 tons) shaping and high temperature sintering (1100-1400 DEG C).
But according to above-mentioned " aluminium metallurgy slag is the research that raw material is made refractory materials " disclosed content production refractory materials (refractory brick), but find to have following disappearance:
1. aluminium metallurgy slag and cakingagent aqueous solution adding presses to after the thick embryo of refractory materials, and before sintering, the thick embryo of this refractory materials can chap or Decrepitation Phenomena because adding be pressed with.
2. in refractory brick, the nitrogen content of thick embryo is higher, meet wet can be because of the following chemical reaction pungent ammonia of overflowing.AlN+3H
2O→Al（OH）
3↓+NH
3↑
Even if 3. be full of cracks or explosion do not occur the thick embryo of the refractory materials before sintering, but the thick embryo of refractory materials is in high-temperature sintering process, and refractory brick can produce be full of cracks or Decrepitation Phenomena because of high temperature sintering.
4. the surperficial fineness of refractory brick not good (comparatively coarse).
Probe into the reason that causes above-listed disappearance, mainly be the disclosed manufacture method of this research, nitride (aluminium nitride) content higher (about 9506ppm) in its aluminium metallurgy slag, because this research cannot effectively reduce the content of nitride in aluminium metallurgy slag, therefore the ammonia that the chance of the nitride in the thick embryo of this refractory materials cakingagent aqueous solution produces escapes phenomenon, is the main cause that causes the thick embryo be full of cracks of refractory materials or explosion.
Therefore, how effectively reducing the content of nitride in aluminium metallurgy slag, is that the follow-up ammonia of minimizing escapes and the thick embryo of refractory materials chaps or the main key of Decrepitation Phenomena.
Summary of the invention
The invention provides a kind of aluminium dust-collector and aluminum metal smelted furnace cinder recycling method; its main purpose is; can control the particle diameter of slag granules; the nitrogen content of slag granules is effectively reduced; and when this slag granules is mixed after the cakingagent aqueous solution; can effectively reduce the phenomenon of reacting effusion ammonia because of water with aluminium nitride, to reduce be full of cracks or the Decrepitation Phenomena of the thick embryo of refractory materials or refractory materials, and reach effect that cost of manufacture is cheap and refractory surface fineness is good.
A kind of aluminium dust-collector of the present invention and aluminum metal smelted furnace cinder recycling method, comprise the following steps:
Step 1: aluminium metallurgy slag is processed as to slag granules;
Step 2: make the particle diameter of above-mentioned slag granules be greater than 200 meshes and be less than 400 meshes;
Step 3: make to meet slag granules and a cakingagent aqueous solution of step 2 condition, form a stock;
Step 4: moulding to this stock pressurization, form the thick embryo of a refractory materials;
Step 5: the thick embryo of this refractory materials is carried out to sintering under 1050 DEG C～1450 DEG C working temperatures, and form a refractory materials through cooling.
In aforesaid method, in step 2, further carry out a slag granules nitrogen content trace routine, with the nitrogen content of confirming slag granules between 4400ppm～7000ppm.
In aforesaid method, this cakingagent aqueous solution is the mixing solutions of water and carboxymethyl cellulose, and this cakingagent addition is between 3wt%～12 wt%.
In aforesaid method, the pressure of this step 4 is between 25 tons～250 tons.
Compared with prior art, the beneficial effect that the present invention has is:
1. by the particle diameter of controlling slag granules, make it be greater than 200 meshes (mesh) and be less than 400 meshes (mesh), can make the nitrogen content in slag granules be down to 4705ppm-6880ppm, effectively solve the problem such as be full of cracks or explosion, be full of cracks or explosion of refractory materials.
2. control the particle diameter of slag granules and meet above-mentioned mesh, only need can reach with lapping mode, with low cost and processing rapidly.
3. the nitrogen content in slag granules reduces, and the ammonia of the thick embryo of refractory materials escapes phenomenon can effectively be reduced thereupon.
4. the particle diameter of controlling slag granules is controlled between 200 mesh～400 meshes, and the surperficial fineness of refractory brick is better.
Brief description of the drawings
Fig. 1 is step 1 schematic diagram of the present invention.
Fig. 2 is step 2 schematic diagram of the present invention.
Fig. 3 is step 3 schematic diagram of the present invention.
Fig. 4 is step 4 schematic diagram of the present invention.
Fig. 5 is step 5 schematic diagram of the present invention.
Fig. 6 is the relative nitrogen content contrast figure of detecting different-grain diameter aluminium metallurgy slag.
Primary clustering nomenclature
Aluminium metallurgy slag 1;
Slag granules 1a;
The slag granules 10a of 400 meshes;
Cakingagent 2;
Stock 3;
The thick embryo 4 of refractory materials;
Refractory materials 5.
Embodiment
Refer to Fig. 1～Fig. 5, be respectively step 1 schematic diagram of the present invention, step 2 schematic diagram of the present invention, step 3 schematic diagram of the present invention, step 4 schematic diagram of the present invention and step 5 schematic diagram of the present invention.As shown in the figure, the present invention is a kind of aluminium dust-collector and aluminum metal smelted furnace cinder recycling method, and it at least comprises the following step:
Step 1: aluminium metallurgy slag 1 is carried out to granulation with lapping mode, form slag granules 1a.
Step 2: screening particle diameter between 200 meshes (mesh) to the slag granules 1a between 400 meshes, in the embodiment of the present invention, be the slag granules 10a that screens 400 meshes be refractory brick raw material, the slag granules 10a of this 400 mesh is carried out to a nitrogen content trace routine, confirm that its nitrogen content is between 4000ppm-4500ppm.
Step 3: the slag granules 10a of this 400 mesh is mixed with cakingagent 2, form a stock 3, these cakingagent 2 aqueous solution are the mixing solutions containing carboxymethyl cellulose, and the present embodiment cakingagent 2 aqueous solution additions are 8 wt%.
Step 4: above-mentioned stock 3 is imposed to the compression strength of 25 tons～250 tons, and be shaped as the thick embryo 4 of a refractory materials, this process can be carried out pressurized operation and complete in a brick mould.
Step 5: the thick embryo 4 of this refractory materials is carried out to sintering under the working temperature of 1050 DEG C to 1450 DEG C, and through cooling form a refractory materials 5, and in sintering process taking 1400 DEG C as preferred temperature.
Fig. 6 is formed (GC-TCD/FID/NCD) to detect the relative nitrogen content contrast figure of different-grain diameter aluminium metallurgy slag with two GC with the series connection of 3 groups of detectors (gas chromatography+thermal conductance detector)+(the luminous detector of gas chromatography+flame ion detector+nitrogen chemical), in experiment, get 10 kilograms, aluminium metallurgy slag and be placed in closed whipping appts, emulation factory running operating parameters, add to scale the carboxyl methyl cellulose cakingagent aqueous solution, controlling agitating unit rotating speed stirs, closed whipping appts air outlet arranges an off-gas pump, gas in reactor is evacuated to built a series of Analytical equipment (before narrating), carry out continuous on-line analysis.As shown in Figure 6, in the time that aluminium smelter slag particle footpath is disclosed 100 ~ 200 mesh of known technology, its nitrogen content is 9506ppm, but aluminium smelter slag particle footpath is in the time of 200 ~ 325 mesh, its nitrogen content obviously reduces 6880ppm, if aluminium smelter slag particle footpath in the time of 325 ~ 400 mesh, its nitrogen content is more obviously reduced to 4705ppm, and aluminium smelter slag particle footpath is while being greater than 400 mesh, nitrogen content only has 4405ppm.Therefore, the particle diameter of control aluminium metallurgy slag of the present invention is greater than 200 meshes (mesh) and is less than 400 meshes (mesh), itself and known art, and nitrogen content can effectively be controlled as only has 49.49% to 72.37% of known technology, and effect is very remarkable.
Due to aluminium metallurgy slag and cakingagent aqueous solution and add and press to after the thick embryo of refractory materials, before sintering, the thick embryo of this refractory materials has be full of cracks or Decrepitation Phenomena, therefore the thick embryo of the following refractory materials of 200 mesh causes ammonia loss amount high because nitrogen content is higher, and while causing pressurization, be full of cracks or explosion ratio are greater than 5%; The thick embryo of the above refractory materials of 200 mesh causes ammonia loss amount low because nitrogen content is lower, while causing pressurization, be full of cracks or explosion ratio are less than 0.5%.
There is not be full of cracks or explosion in the thick embryo of refractory materials before sintering, but the thick embryo of refractory materials is in high-temperature sintering process, when refractory brick can be because of sintering, ammonia loss produces be full of cracks or explosion, the thick embryo of the following refractory materials of 200 mesh causes ammonia loss amount high because nitrogen content is higher, while causing high temperature sintering, be full of cracks or explosion ratio are greater than 5%; The thick embryo of the above refractory materials of 200 mesh causes ammonia loss amount low because nitrogen content is lower, while causing high temperature, be full of cracks or explosion ratio are less than 0.5%.
Use and make the present invention at least there is following effect:
5. by the particle diameter of controlling slag granules, make it be greater than 200 meshes (mesh) and be less than 400 meshes (mesh), can make the nitrogen content in slag granules be down to 4705ppm-6880ppm, effectively solve the problem such as be full of cracks or explosion, be full of cracks or explosion of refractory materials.
6. control the particle diameter of slag granules and meet above-mentioned mesh, only need can reach with lapping mode, with low cost and processing rapidly.
7. the nitrogen content in slag granules reduces, and the ammonia of the thick embryo of refractory materials escapes phenomenon can effectively be reduced thereupon.
8. the particle diameter of controlling slag granules is controlled between 200 mesh～400 meshes, and the surperficial fineness of refractory brick is better.
In sum, aluminium dust-collector of the present invention and aluminum metal smelted furnace cinder recycling method can effectively be improved the various shortcoming of use, can control the particle diameter of slag granules, the nitrogen content of slag granules is effectively reduced, and when this slag granules is mixed after the cakingagent aqueous solution, can effectively reduce the phenomenon of reacting effusion ammonia because of water with aluminium nitride, to reduce the thick embryo of refractory materials or refractory materials be full of cracks or Decrepitation Phenomena, and reach effect that cost of manufacture is cheap and refractory surface fineness is good; And then make generation of the present invention can more progressive, more practical, more meet human consumer use institute must, really met application for a patent for invention important document, whence proposes patent application in accordance with the law.
Claims (4)
1. an aluminium dust-collector and aluminum metal smelted furnace cinder recycling method, is characterized in that comprising the following steps:
Step 1: aluminium metallurgy slag is processed as to slag granules;
Step 2: make the particle diameter of above-mentioned slag granules be greater than 200 meshes and be less than 400 meshes;
Step 3: make to meet slag granules and a cakingagent aqueous solution of step 2 condition, form a stock;
Step 4: moulding to this stock pressurization, form the thick embryo of a refractory materials;
Step 5: the thick embryo of this refractory materials is carried out to sintering under 1050 DEG C～1450 DEG C working temperatures, and form a refractory materials through cooling.
2. aluminium dust-collector as claimed in claim 1 and aluminum metal smelted furnace cinder recycling method, is characterized in that, further carries out a slag granules nitrogen content trace routine in step 2, with the nitrogen content of confirming slag granules between 4400ppm～7000ppm.
3. aluminium dust-collector as claimed in claim 1 and aluminum metal smelted furnace cinder recycling method, is characterized in that, this cakingagent aqueous solution is the mixing solutions of water and carboxymethyl cellulose, and this cakingagent addition is between 3wt%～12 wt%.
4. aluminium dust-collector as claimed in claim 1 and aluminum metal smelted furnace cinder recycling method, is characterized in that, the pressure of this step 4 is between 25 tons～250 tons.
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| CN201310046708.6A CN103964709B (en) | 2013-02-06 | 2013-02-06 | Aluminum metal smelted furnace cinder reuse method |
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| CN201310046708.6A CN103964709B (en) | 2013-02-06 | 2013-02-06 | Aluminum metal smelted furnace cinder reuse method |
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| CN103964709A true CN103964709A (en) | 2014-08-06 |
| CN103964709B CN103964709B (en) | 2016-03-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105819475A (en) * | 2015-01-07 | 2016-08-03 | 蒋世杰 | Radiofrequency plasma synthetic method for extracting alumina from aluminum residues |
| CN109719114B (en) * | 2018-12-13 | 2020-12-01 | 淮北阳晖科技有限公司 | Recycling process of slag of aluminum smelting furnace |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW215075B (en) * | 1992-02-14 | 1993-10-21 | Ind Tech Res Inst | Bis aluminum sediment recycling method |
| TW583155B (en) * | 2002-11-19 | 2004-04-11 | Spire Environmental Prot Techn | Method for recycling aluminum slag ash |
| CN1541782A (en) * | 2003-11-08 | 2004-11-03 | 隆杰环保科技股份有限公司 | Method for utilizing aluminium cinder as resource |
| CN101066876A (en) * | 2007-06-13 | 2007-11-07 | 潘国明 | Process of producing high grade refractory material with alumina-chrome slag |
-
2013
- 2013-02-06 CN CN201310046708.6A patent/CN103964709B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW215075B (en) * | 1992-02-14 | 1993-10-21 | Ind Tech Res Inst | Bis aluminum sediment recycling method |
| TW583155B (en) * | 2002-11-19 | 2004-04-11 | Spire Environmental Prot Techn | Method for recycling aluminum slag ash |
| CN1541782A (en) * | 2003-11-08 | 2004-11-03 | 隆杰环保科技股份有限公司 | Method for utilizing aluminium cinder as resource |
| CN101066876A (en) * | 2007-06-13 | 2007-11-07 | 潘国明 | Process of producing high grade refractory material with alumina-chrome slag |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105819475A (en) * | 2015-01-07 | 2016-08-03 | 蒋世杰 | Radiofrequency plasma synthetic method for extracting alumina from aluminum residues |
| CN109719114B (en) * | 2018-12-13 | 2020-12-01 | 淮北阳晖科技有限公司 | Recycling process of slag of aluminum smelting furnace |
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|---|---|
| CN103964709B (en) | 2016-03-09 |
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Effective date of registration: 20180907 Address after: 2 floor 205, building 2, Tin Village Road, Haidian District, Beijing, 23 Patentee after: Beijing Zhong Guan Jia Jie environmental protection technology Co., Ltd. Address before: 5, 193 Chongming Road, Tainan East, Taiwan, China Patentee before: Jia Jie Metallgesellschaft AG |
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Effective date of registration: 20211102 Address after: Room 3-10, unit 1, floor 3, No. 2, Zhengda Road, Shijingshan District, Beijing 100043 Patentee after: Beijing qinghejin Environmental Protection Technology Co.,Ltd. Address before: 100143 205, floor 2, building 2, No. 23, Tiancun Road, Haidian District, Beijing Patentee before: Beijing Zhong Guan Jia Jie environmental protection technology Co.,Ltd. |