CN103964709B - Aluminum metal smelted furnace cinder reuse method - Google Patents
Aluminum metal smelted furnace cinder reuse method Download PDFInfo
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- CN103964709B CN103964709B CN201310046708.6A CN201310046708A CN103964709B CN 103964709 B CN103964709 B CN 103964709B CN 201310046708 A CN201310046708 A CN 201310046708A CN 103964709 B CN103964709 B CN 103964709B
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- refractory materials
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- cakingagent
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Abstract
A kind of aluminum metal smelted furnace cinder reuse method, aluminium metallurgy slag is processed as slag granules by it, the particle diameter of above-mentioned slag granules is made to be 200 mesh ~ 400 meshes, allow qualified slag granules and a cakingagent aqueous solution, form a stock, moulding to the pressurization of this stock afterwards, form the thick embryo of a refractory materials, again thick for this refractory materials embryo is sintered under 1050 DEG C ~ 1450 DEG C working temperatures, and through cooling formation one refractory materials.By this; the particle diameter of slag granules can be controlled; the nitrogen content of slag granules is effectively reduced; and when after this slag granules mixing cakingagent aqueous solution; can effectively reduce because water and aluminium nitride react and the phenomenon of ammonia of overflowing; 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.
Description
Technical field
The present invention has about a kind of aluminum metal smelted furnace cinder reuse method; refer to a kind of particle diameter controlling slag granules especially; the nitrogen content of slag granules is effectively reduced; and when after this slag granules mixing cakingagent aqueous solution; can effectively reduce because water and aluminium nitride react and the phenomenon of ammonia of overflowing; 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
Can produce slag in the fusion process of aluminium, include oxide compound and the nitride of aluminium in slag, wherein nitride can react with the moisture in damp atmosphere or rainwater and form 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 aluminium slag ash waste remaining after aluminium metallurgy slag sorting Footwall drift aluminium 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 utilized by aluminium slag ash high temperature kiln to be sintered into the material of main component for aluminum oxide (crystallizable mineral is corundum mutually), with as raw material for refractory, not only effectively can solve the problem of aluminium slag ash offal treatment, and the waste of producing the refractory materials energy and avoiding resource can be saved.
No. 583155th, above-mentioned TaiWan, China patent of invention, although the raw material that aluminium slag ash can be treated as refractory brick, refractory mortar, mould material, for how to make refractory brick and how to guarantee that the product yield made in refractory brick process does not then give exposure completely.
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 makes refractory materials ", the production method wherein disclosing refractory materials, for being puddled with the cakingagent aqueous solution (carboxymethyl cellulose aqueous solution) according to proportioning by aluminium metallurgy slag (particle diameter is between 100-200mesh), makes refractory materials via single shaft pressurization (20 tons) shaping and high temperature sintering (1100-1400 DEG C).
But according to the content production refractory materials (refractory brick) disclosed by above-mentioned " aluminium metallurgy slag is the research of raw material making refractory materials ", but find to have following disappearance:
1. aluminium metallurgy slag and cakingagent aqueous solution after adding and pressing to the thick embryo of refractory materials, 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, and the wet meeting of chance is pungent ammonia of overflowing because of following chemical reaction.
AlN+3H
2O→Al(OH)
3↓+NH
3↑
Even if be full of cracks or explosion do not occur the refractory materials thick embryo 3. before sintering, but the thick embryo of refractory materials is in high-temperature sintering process, 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 causing above-listed disappearance, mainly be the manufacture method that this institute discloses, nitride (aluminium nitride) content higher (about 9506ppm) in its aluminium metallurgy slag, because this research effectively cannot reduce the content of nitride in aluminium metallurgy slag, therefore the ammonia that the nitride chance cakingagent aqueous solution in the thick embryo of this refractory materials produces escapes phenomenon, is the main cause causing 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 Chief of Decrepitation Phenomena.
Summary of the invention
The invention provides a kind of aluminum metal smelted furnace cinder reuse method; its main purpose is; the particle diameter of slag granules can be controlled; the nitrogen content of slag granules is effectively reduced; and when after this slag granules mixing cakingagent aqueous solution; effectively can reduce because water and aluminium nitride react and the phenomenon of ammonia of overflowing, 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 aluminum metal smelted furnace cinder of the present invention reuse method, comprises the following steps:
Step one: aluminium metallurgy slag is processed as slag granules;
Step 2: make the particle diameter of above-mentioned slag granules be 200 mesh ~ 400 meshes;
Step 3: make the slag granules and the cakingagent aqueous solution that meet step 2 condition, form a stock;
Step 4: moulding to the pressurization of this stock, forms the thick embryo of a refractory materials;
Step 5: the thick embryo of this refractory materials is sintered under 1050 DEG C ~ 1450 DEG C working temperatures, and through cooling formation one refractory materials.
In aforesaid method, in step 2, perform a slag granules nitrogen content trace routine further, to confirm that the nitrogen content of slag granules is 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% ~ 12wt%.
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 controlling slag granules, be 200 mesh ~ 400 meshes (mesh), the nitrogen content in slag granules can be made to be down to 4705ppm-6880ppm, the problems such as the be full of cracks of effective solution refractory materials or explosion, be full of cracks or explosion.
2. control the particle diameter of slag granules and meet above-mentioned mesh, only can need 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. control the size controlling of slag granules between 200 mesh ~ 400 meshes, the surperficial fineness of refractory brick is better.
Accompanying drawing explanation
Fig. 1 is step one 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 one 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 aluminum metal smelted furnace cinder reuse method, and it at least comprises the following step:
Step one: aluminium metallurgy slag 1 is carried out granulation with lapping mode, forms slag granules 1a.
Step 2: the slag granules 1a of screening particle diameter between 200 meshes (mesh) to 400 meshes, screen the slag granules 10a of 400 meshes for refractory brick raw material in the embodiment of the present invention, one nitrogen content trace routine is performed to the slag granules 10a of this 400 mesh, confirms that its nitrogen content is between 4000ppm-4500ppm.
Step 3: mixed with cakingagent 2 by the slag granules 10a of this 400 mesh, forms a stock 3, and this cakingagent 2 aqueous solution is the mixing solutions containing carboxymethyl cellulose, and the present embodiment cakingagent 2 aqueous solution addition is 8wt%.
Step 4: the compression strength above-mentioned stock 3 being imposed to 25 tons ~ 250 tons, and be shaped as the thick embryo 4 of a refractory materials, this process can perform pressurized operation and complete in a brick mould.
Step 5: the thick embryo 4 of this refractory materials is sintered under the working temperature of 1050 DEG C to 1450 DEG C, and through cooling formation one refractory materials 5, and in sintering process with 1400 DEG C for preferred temperature.
Fig. 6 with the series connection of two GC and 3 groups of detectors (gas chromatography+thermal conductance detector)+(gas chromatography+flame ion detector+nitrogen chemical luminescence detection device) form (GC-TCD/FID/NCD) to detect the relative nitrogen content contrast figure of different-grain diameter aluminium metallurgy slag, get 10 kilograms, aluminium metallurgy slag in experiment and be placed in closed whipping appts, emulation plant operation operating parameters, add the carboxyl methyl cellulose cakingagent aqueous solution to scale, control agitating unit rotating speed to stir, closed whipping appts air outlet arranges an off-gas pump, gas in reactor is evacuated to built a series of Analytical equipment (before describing), carry out continuous on-line analysis.As shown in Figure 6, when 100 ~ 200 mesh of aluminium smelter slag particle footpath disclosed by known technology, its nitrogen content is 9506ppm, but aluminium smelter slag particle footpath is when 200 ~ 325 mesh, its nitrogen content then obviously reduces 6880ppm, if aluminium smelter slag particle footpath is when 325 ~ 400 mesh, its nitrogen content is then more obviously reduced to 4705ppm, and aluminium smelter slag particle footpath is when being greater than 400 mesh, nitrogen content only has 4405ppm.Therefore, the particle diameter that the present invention controls aluminium metallurgy slag is 200 meshes (mesh) ~ 400 mesh (mesh), itself and known art, 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 after adding and pressing to 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 when 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, when 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 the refractory materials before sintering, but the thick embryo of refractory materials is in high-temperature sintering process, refractory brick can produce be full of cracks or explosion because of ammonia loss during sintering, the thick embryo of the following refractory materials of 200 mesh causes ammonia loss amount high because nitrogen content is higher, when 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, when causing high temperature, be full of cracks or explosion ratio are less than 0.5%.
Use and make the present invention at least have following effect:
1. by the particle diameter controlling slag granules, be 200 meshes (mesh) ~ 400 mesh (mesh), the nitrogen content in slag granules can be made to be down to 4705ppm-6880ppm, the problems such as the be full of cracks of effective solution refractory materials or explosion, be full of cracks or explosion.
2. control the particle diameter of slag granules and meet above-mentioned mesh, only can need 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. control the size controlling of slag granules between 200 mesh ~ 400 meshes, the surperficial fineness of refractory brick is better.
In sum, aluminum metal smelted furnace cinder reuse method of the present invention effectively can improve various shortcoming, the particle diameter of slag granules can be controlled, the nitrogen content of slag granules is effectively reduced, and when after this slag granules mixing cakingagent aqueous solution, effectively can reduce because water and aluminium nitride react and the phenomenon of ammonia of overflowing, 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, indeed meet application for a patent for invention important document, whence patent application is proposed in accordance with the law.
Claims (4)
1. an aluminum metal smelted furnace cinder reuse method, is characterized in that comprising the following steps:
Step one: aluminium metallurgy slag is processed as slag granules;
Step 2: make the particle diameter of above-mentioned slag granules be 200 mesh ~ 400 meshes;
Step 3: make the slag granules and the cakingagent aqueous solution that meet step 2 condition, form a stock;
Step 4: moulding to the pressurization of this stock, forms the thick embryo of a refractory materials;
Step 5: the thick embryo of this refractory materials is sintered under 1050 DEG C ~ 1450 DEG C working temperatures, and through cooling formation one refractory materials.
2. aluminum metal smelted furnace cinder reuse method as claimed in claim 1, is characterized in that, performs a slag granules nitrogen content trace routine further, to confirm that the nitrogen content of slag granules is between 4400ppm ~ 7000ppm in step 2.
3. aluminum metal smelted furnace cinder reuse method as claimed in claim 1, it is characterized in that, this cakingagent aqueous solution is the mixing solutions of water and carboxymethyl cellulose, and this cakingagent addition is between 3wt% ~ 12wt%.
4. aluminum metal smelted furnace cinder reuse method as claimed in claim 1, it 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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| CN103964709B true CN103964709B (en) | 2016-03-09 |
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| 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 |
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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. |
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