JP5781106B2 - Aluminum dust collection and aluminum smelting slag recycling method - Google Patents
Aluminum dust collection and aluminum smelting slag recycling method Download PDFInfo
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- 239000002893 slag Substances 0.000 title claims description 75
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 56
- 229910052782 aluminium Inorganic materials 0.000 title claims description 52
- 238000003723 Smelting Methods 0.000 title claims description 37
- 238000000034 method Methods 0.000 title claims description 26
- 239000000428 dust Substances 0.000 title claims description 11
- 238000004064 recycling Methods 0.000 title claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 44
- 239000002245 particle Substances 0.000 claims description 27
- 229910052757 nitrogen Inorganic materials 0.000 claims description 22
- 239000011819 refractory material Substances 0.000 claims description 22
- 239000000853 adhesive Substances 0.000 claims description 16
- 230000001070 adhesive effect Effects 0.000 claims description 16
- 239000007864 aqueous solution Substances 0.000 claims description 15
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 6
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 6
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 5
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 13
- 239000011449 brick Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 10
- 238000005245 sintering Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 6
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 150000004767 nitrides Chemical class 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000003442 weekly effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000001165 gas chromatography-thermal conductivity detection Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000003826 uniaxial pressing Methods 0.000 description 1
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- Compositions Of Oxide Ceramics (AREA)
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- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Description
本発明は、アルミニウム集塵とアルミニウム製錬スラグ再利用方法に関し、特に、スラグ粒の粒径を制御して、スラグ粒の窒素含有量を有効に低下させ、また、上記スラグ粒を粘着剤水溶液に混合した後、水と窒化アルミニウムとの反応によってアンモニアガスが生成される現象を有効に低減でき、耐火材ブランクや耐火材のクラックや破裂現象が低下し、そのため、作製のコストダウンや耐火材の表面が細緻化される効果が実現されるものに関する。
The present invention relates to aluminum dust and aluminum smelting slag recycling process, in particular, by controlling the particle size of the slag particles, the nitrogen content of the slag grains effectively reduces the, also, the slag grains adhesive After mixing in an aqueous solution, the phenomenon of ammonia gas generation due to the reaction between water and aluminum nitride can be effectively reduced, reducing the cracking and rupture phenomena of the refractory blank and refractory material. The present invention relates to a material in which the effect of refining the surface of the material is realized.
アルミニウムを溶解する過程において、スラグが生成され、スラグにアルミニウムの酸化物と窒化物が含まれ、その中、窒化物が湿り空気内の水分や雨水と反応して、アンモニアガスが形成されて排出され、そのため、処理されていないスラグが、環境に対して一定の程度に影響を与える。
中華民国発明特許第５８３１５５号に、アルミニウムスラグを資源化させて利用する方法が掲示され、主として、アルミニウム製錬スラグを選別して、金属アルミニウムを回収した後のアルミニウムスラグ廃棄物を、か焼して、耐火材の原料に作製し、アルミニウムスラグ資源化の目的が実現されて、より高い経済価値が創造され、その方法は、アルミニウムスラグを、高温炉で、主な成分が酸化アルミニウム（鉱物結晶相が鋼玉石で）の材料にか焼して、耐火材の原料とし、それにより、有効にアルミニウムスラグ廃棄物処理の問題を解決でき、それとともに、耐火材の生産エネルギーを節約でき、資源の無駄を解消できる。
上記第５８３１５５号発明特許によれば、アルミニウムスラグを耐火煉瓦や耐火泥或いは鋳込材の原料に処理できるが、如何に耐火煉瓦を作製することや、如何に作製する耐火煉瓦の歩留まりを確保することについて、完全に触れていない。
また、２０１１年３月出版の「鉱業冶金」週刊誌のＰ．５１に、「アルミニウム製錬スラグを原料として、耐火材を作製する研究」が記載され、その中、耐火材の作製方式が、アルミニウム製錬スラグ（粒径が、１００−２００ｍｅｓｈの範囲で）を、割合で、粘着剤水溶液（カルボキシメチルセルロース水溶液）と混合撹拌し、単軸加圧（２０トン）で成形して高温焼結（１１００−１４００℃）させて、耐火材を作製する。
しかし、上記「アルミニウム製錬スラグを原料として、耐火材を作製する研究」に記載されている内容に基づいて、耐火材（耐火煉瓦）を作製して試すと、次の問題点がある。
アルミニウム製錬スラグと粘着剤水溶液とを混合して耐火材ブランクに加圧成形した後、焼結する前、上記耐火材ブランクが加圧によりクラックや破裂する現象が発生する。
耐火煉瓦のブランクに窒素含有量がやや高くて湿りに遇うと、下記の化学反応により臭いアンモニアガスが発生する。
In the process of melting aluminum, slag is generated, and the slag contains aluminum oxide and nitride, in which the nitride reacts with moisture and rainwater in the humid air, and ammonia gas is formed and discharged Thus, untreated slag affects the environment to a certain extent.
In Taiwan Patent No. 583155, a method for using aluminum slag as a resource is posted, and mainly smelting aluminum slag after smelting aluminum slag and recovering metallic aluminum is calcined. As a raw material for refractory materials, the purpose of reusing aluminum slag is realized, and higher economic value is created. The method is to use aluminum slag in a high-temperature furnace, and the main component is aluminum oxide (mineral crystals). The material is calcined into a material with a boulder as a raw material for refractory, thereby effectively solving the problem of aluminum slag waste disposal, and at the same time, saving the production energy of refractory, You can eliminate waste.
According to the above-mentioned patent No. 583155 invention, aluminum slag can be processed into refractory bricks, refractory mud or cast material, but how to make refractory bricks and how to make refractory bricks to be produced is ensured. I haven't touched it completely.
In addition, “Mineral Metallurgy” weekly magazine published March 2011 51, "Research to produce refractory material using aluminum smelting slag as a raw material" is described. Among them, the production method of refractory material is aluminum smelting slag (particle diameter is in the range of 100-200 mesh). The mixture is mixed and stirred with a pressure-sensitive adhesive aqueous solution (carboxymethylcellulose aqueous solution) at a ratio, molded by uniaxial pressing (20 tons), and sintered at high temperature (1100 to 1400 ° C.) to produce a refractory material.
However, when a refractory material (refractory brick) is produced and tested based on the contents described in the above-mentioned “Research for producing a refractory material using aluminum smelting slag as a raw material”, there are the following problems.
After the aluminum smelting slag and the pressure-sensitive adhesive aqueous solution are mixed and pressure-molded into a refractory material blank, before the sintering, the refractory material blank is cracked or ruptured by pressurization.
When a refractory blank has a slightly high nitrogen content and is exposed to moisture, odorous ammonia gas is generated by the following chemical reaction.
耐火煉瓦表面の細緻化が良くない（粗い）。
上記の問題点は、主として、上記研究による製造方法によれば、アルミニウム製錬スラグ中の窒化物（窒化アルミニウム）含有量がやや高い（約９５０６ｐｐｍ）ことを解明したが、上記研究によると、アルミニウム製錬スラグの窒化物含有量を有効に低減できないため、上記耐火材ブランク中の窒化物が粘着剤水溶液に遭ってアンモニアガスを生成する現象が発生し、耐火材ブランクにクラックが入ったり破裂する。
そのため、如何に、アルミニウム製錬スラグ中の窒化物含有量を有効に低減させるかは、アンモニアガスの発生や耐火材ブランクのクラックや破裂の現象を低下させるためのキーになる。
The refractory brick surface is not fine (rough).
The above-mentioned problems are mainly clarified that the nitride (aluminum nitride) content in the aluminum smelting slag is slightly high (about 9506 ppm) according to the production method by the above research. Since the nitride content of smelting slag cannot be reduced effectively, the phenomenon that the nitride in the refractory blank encounters the adhesive aqueous solution and generates ammonia gas occurs, and the refractory blank is cracked or ruptured. .
Therefore, how to effectively reduce the nitride content in the aluminum smelting slag is a key for reducing the generation of ammonia gas and the phenomenon of cracking and rupture of the refractory blank.
本発明者は、上記欠点を解消するため、慎重に研究し、また、学理を活用して、有効に上記欠点を解消でき、設計が合理である本発明を提案する。 The present inventor proposes the present invention in which the above-mentioned drawbacks are solved by careful research, and the above-mentioned drawbacks can be effectively eliminated by utilizing science, and the design is rational.
本発明の主な目的は、スラグ粒の粒径を制御して、スラグ粒の窒素含有量を有効に低下させ、また、上記スラグ粒を粘着剤水溶液に混合して、水と窒化アルミニウムとの反応によるアンモニアガスが発生する現象を有効に低減でき、耐火材のブランクや耐火材のクラックや破裂現象を有効に低下でき、作製コストダウンや耐火材表面の細緻化が実現されるアルミニウム集塵とアルミニウム金属製錬スラグ再利用方法を提供する。 The main object of the present invention is to control the particle size of the slag particles to effectively reduce the nitrogen content of the slag particles, and to mix the slag particles with the adhesive aqueous solution so that water and aluminum nitride are mixed. Aluminum dust collection that can effectively reduce the phenomenon of ammonia gas generated by the reaction, can effectively reduce the refractory blank and refractory cracks and rupture phenomenon, reduce the production cost and refine the surface of the refractory Provide a method for reusing aluminum metal smelting slag.
本発明は、アルミニウム集塵とアルミニウム製錬スラグ再利用方法であって、
アルミニウム製錬スラグを研磨してスラグ粒に加工するステップ一と、
研磨した上記スラグ粒の粒径を２００メッシュ（ｍｅｓｈ）乃至４００メッシュ（ｍｅｓｈ）の範囲内にするステップ二と、
ステップ二の条件を満たすスラグ粒を粘着剤水溶液と混合してブランクを形成するステップ三と、
上記ブランクを加圧整形して、耐火材ブランクが形成されるステップ四と、
上記耐火材ブランクを１０５０℃〜１４５０℃の運転温度で焼結させ、徐冷して耐火材が形成されるステップ五と、を含み、
アルミニウムを溶解する過程でできるアルミニウム製錬スラグを回収してから前記ステップ四までの間に前記アルミ製錬スラグを加熱処理する工程は無い
ことを特徴とする。
The present invention provides a aluminum dust and aluminum smelting slag recycling process,
Step 1 to grind aluminum smelting slag and process it into slag grains,
Step 2 to bring the particle size of the polished slag grains to a range of 200 mesh (mesh) to 400 mesh (mesh);
Step 3 for forming a blank by mixing slag particles satisfying the condition of Step 2 with an adhesive aqueous solution,
Step 4 in which the blank is pressurized and shaped to form a refractory blank,
Step 5 in which the refractory material blank is sintered at an operating temperature of 1050 ° C. to 1450 ° C. and slowly cooled to form a refractory material,
There is no step of heat-treating the aluminum smelting slag after the recovery of the aluminum smelting slag formed in the process of melting aluminum until the step 4 .
本発明の上記の実施例によれば、上記ステップ二において、更に、スラグ粒の窒素含有量が４４００ｐｐｍ〜７０００ｐｐｍ範囲内になることを確認するスラグ粒の窒素含有量検出手順が含まれる。
本発明の上記実施例において、上記粘着剤水溶液はカルボキシメチルセルロース含有の混合溶液であり、粘着剤水溶液添加量が３ｗｔ％〜１２ｗｔ％の範囲内にある。
本発明の上記実施例において、上記ステップ四の圧力は２５トン〜２５０トンの範囲内にある。
According to the above-described embodiment of the present invention, the step 2 further includes a procedure for detecting the nitrogen content of the slag grains, which confirms that the nitrogen content of the slag grains falls within the range of 4400 ppm to 7000 ppm.
In the said Example of this invention, the said adhesive aqueous solution is a carboxymethylcellulose containing mixed solution, and the addition amount of adhesive aqueous solution exists in the range of 3 wt%-12 wt%.
In the above embodiment of the present invention, the pressure in Step 4 is in the range of 25 to 250 tons.
以下、図面を参照しながら、本発明の特徴や技術内容について、詳しく説明するが、それらの図面等は、参考や説明のためであり、本発明はそれによって制限されることは無い。 Hereinafter, the features and technical contents of the present invention will be described in detail with reference to the drawings. However, the drawings and the like are for reference and explanation, and the present invention is not limited thereby.
図１〜図５は、それぞれ、本発明のステップ一の概念図と本発明のステップ二の概念図、本発明のステップ三の概念図、本発明のステップ四の概念図及び本発明のステップ五の概念図である。図のように、本発明に係るアルミニウム集塵とアルミニウム金属製錬スラグ再利用方法は、少なくとも、アルミニウム製錬スラグ１を研磨して造粒し、スラグ粒１ａが形成されるステップ一と、粒径が２００メッシュ（ｍｅｓｈ）乃至４００メッシュの範囲のスラグ粒１ａを選別し、本発明の実施例において、４００メッシュのスラグ粒１０ａを耐火煉瓦原料として選別し、上記４００メッシュのスラグ粒１０ａに対して窒素含有量検出手順を行い、その窒素含有量が４０００ｐｐｍ−４５００ｐｐｍの範囲内にあることを確認するステップ二と、上記４００メッシュのスラグ粒１０ａを粘着剤２と混合してブランク３が形成され、上記粘着剤２水溶液がカルボキシメチルセルロース含有の混合溶液で、本実施例の粘着剤２水溶液添加量が８ｗｔ％であるステップ三と、上記ブランク３に対して２５トン〜２５０トンの圧力を印加して、耐火材ブランク４に整形され、上記過程が、煉瓦型モールドにおいて、加圧することにより実行されても良いステップ四と、上記耐火材ブランク４を１０５０℃乃至１４５０℃の運転温度下で焼結し、徐冷して耐火材５が形成され、焼結過程において１４００℃の温度が好ましいステップ五と、が含有される。 1 to 5 are a conceptual diagram of Step 1 of the present invention, a conceptual diagram of Step 2 of the present invention, a conceptual diagram of Step 3 of the present invention, a conceptual diagram of Step 4 of the present invention, and a step 5 of the present invention, respectively. FIG. As shown in the figure, the aluminum dust collection and aluminum metal smelting slag recycling method according to the present invention includes at least step 1 of polishing and granulating aluminum smelting slag 1 to form slag grains 1a, A slag particle 1a having a diameter in the range of 200 mesh to 400 mesh is selected. In an embodiment of the present invention, a 400 mesh slag particle 10a is selected as a refractory brick material, and the 400 mesh slag particle 10a is selected. Step 2 for performing the nitrogen content detection procedure and confirming that the nitrogen content is within the range of 4000 ppm to 4500 ppm and the 400 mesh slag particles 10a are mixed with the adhesive 2 to form the blank 3. The adhesive 2 aqueous solution is a mixed solution containing carboxymethyl cellulose, and the amount of the adhesive 2 aqueous solution added in this example is 8 Applying a pressure of 25 to 250 tons to Step 3 which is t% and the blank 3 is shaped into a refractory material blank 4, and the above process is executed by pressing in a brick mold Step 4 and Step 5 in which the refractory material blank 4 is sintered at an operating temperature of 1050 ° C. to 1450 ° C. and slowly cooled to form the refractory material 5, and a temperature of 1400 ° C. is preferable in the sintering process. , Is contained.
図６は、二基のＧＣと３組のセンサー（ガスクロマトグラフィー＋熱伝導度検出器）＋（ガスクロマトグラフィー＋水素炎イオン化型検出器＋窒素化学発光検出器）を直列に接続してからなる（ＧＣ−ＴＣＤ／ＦＩＤ／ＮＣＤ）で、異なる粒径のアルミニウム製錬スラグを検知する相対窒素含量対照図で実験する時、１０キロのアルミニウム製錬スラグを閉鎖式攪拌装置に入れ込み、現場稼動操作パラメーターを模擬し、所定の割合でカルボキシメチルセルロースＣＭＣ粘着剤水溶液を添加し、攪拌単位の回転数を制御しながら攪拌し、閉鎖式攪拌装置のガス出口に空気抜きポンプが設置されて、反応器内の気体を系列分析設備（前述したように）に吸引して、連続的にオンライン分析を行う。
図６から分かるように、アルミニウム製錬スラグの粒径が、従来技術に示された１００〜２００メッシュの時、その窒素含有量が９５０６ｐｐｍであるが、アルミニウム製錬スラグの粒径が２００〜３２５メッシュの範囲内にある時、その窒素含有量が６８８０ｐｐｍまでに明白に低下され、アルミニウム製錬スラグの粒径が３２５〜４００メッシュである時、その窒素含有量が４７０５ｐｐｍまでより明白に低下され、アルミニウム製錬スラグの粒径が４００メッシュよりも大きい時、窒素含有量が４４０５ｐｐｍしかない。
そのため、本発明は、アルミニウム製錬スラグの粒径が２００メッシュ（ｍｅｓｈ）から４００メッシュ（ｍｅｓｈ）までの範囲内に制御すれば、従来技術と比較すると、窒素含有量が従来技術の４９．４９％乃至７２．３７％に有効に制御され、効果がより明白になる。
Fig. 6 shows two GCs and three sets of sensors (gas chromatography + thermal conductivity detector) + (gas chromatography + flame ionization detector + nitrogen chemiluminescence detector) connected in series. (GC-TCD / FID / NCD), when experimenting with a relative nitrogen content control diagram that detects aluminum smelting slag of different particle sizes, put 10 kg of aluminum smelting slag into a closed stirrer and put it into operation Simulate operating parameters, add carboxymethylcellulose CMC adhesive aqueous solution at a predetermined rate, stir while controlling the rotation speed of the stirring unit, and install an air vent pump at the gas outlet of the closed stirrer. Is continuously sucked into a series analysis facility (as described above) and continuously analyzed online.
As can be seen from FIG. 6, when the particle size of the aluminum smelting slag is 100 to 200 mesh shown in the prior art, the nitrogen content is 9506 ppm, but the particle size of the aluminum smelting slag is 200 to 325. When within the mesh range, its nitrogen content is clearly reduced to 6880 ppm, and when the particle size of the aluminum smelting slag is 325-400 mesh, its nitrogen content is more clearly reduced to 4705 ppm, When the particle size of the aluminum smelting slag is larger than 400 mesh, the nitrogen content is only 4405 ppm.
Therefore, according to the present invention, when the particle size of the aluminum smelting slag is controlled within the range of 200 mesh to 400 mesh, the nitrogen content is 49.49 of the prior art as compared with the prior art. % To 72.37% is effectively controlled, and the effect becomes more obvious.
アルミニウム製錬スラグと粘着剤水溶液とを混合して、耐火材ブランクに加圧された後、焼結する前、上記耐火材ブランクはクラックや破裂現象が発生し、そのため、２００メッシュ以下の耐火材ブランクであれば、窒素含有量が高いから、アンモニアガスが多く発生して、加圧する時、クラックや破裂割合が５％よりも大きく、２００メッシュ以上の耐火材ブランクであれば、窒素含有量が低いから、アンモニアガスの発生が低くなり、加圧する時、クラックや破裂割合が０．５％よりも小さい。 After the aluminum smelting slag and the adhesive aqueous solution are mixed and pressed onto the refractory material blank, before the sintering, the refractory material blank is cracked or ruptured. If it is a blank, since the nitrogen content is high, a large amount of ammonia gas is generated, and when pressurizing, the crack or rupture rate is greater than 5%, and if it is a refractory blank of 200 mesh or more, the nitrogen content is Since it is low, the generation of ammonia gas is low, and when pressurizing, the crack and rupture ratio are smaller than 0.5%.
焼結前の耐火材ブランクはクラックや破裂が発生しないが、耐火材ブランクは、高温焼結過程において、耐火煉瓦を焼結する時のアンモニアガス発生によりクラックや破裂が発生し、２００メッシュ以下の耐火材ブランクは、窒素含有量がやや高いから、アンモニアガスの発生量が高く、高温焼結の時、クラックや破裂の割合が５％よりも大きくなり、２００メッシュ以上の耐火材ブランクは、窒素含有量が、やや低いから、アンモニアガスの発生量が低く、高温の時、クラックや破裂の割合が０．５％よりも小さくなる。 Although the refractory blank before sintering does not crack or rupture, the refractory blank is cracked or ruptured due to the generation of ammonia gas during sintering of the refractory brick in the high-temperature sintering process. Since the refractory blank has a slightly high nitrogen content, the amount of ammonia gas generated is high. During high-temperature sintering, the crack and rupture rate is greater than 5%. Since the content is slightly low, the amount of ammonia gas generated is low, and at high temperatures, the ratio of cracks and ruptures is less than 0.5%.
本発明によれば、少なくとも、下記の利点が得られ、
1、スラグ粒の粒径を制御することにより、２００メッシュ（ｍｅｓｈ）乃至４００メッシュ（ｍｅｓｈ）の範囲内になり、スラグ粒中の窒素含有量を４７０５ｐｐｍ−６８８０ｐｐｍに低下させ、耐火材のクラックや破裂等の問題点を有効に解消できる。
２、スラグ粒の粒径を上記メッシュに満足できるように制御することは、研磨で達成でき、コストダウン且つ加工快速の利点が得られる。
３、スラグ粒中の窒素含有量が低下されて、耐火材ブランクのアンモニアガスの発生現象も、それとともに、有効に低減される。
４、スラグ粒の粒径を２００メッシュ〜４００メッシュの間に制御することにより、耐火煉瓦の表面細緻化がより優れる。
According to the present invention, at least the following advantages are obtained:
1. By controlling the particle size of the slag grains, it becomes in the range of 200 mesh (mesh) to 400 mesh (mesh), the nitrogen content in the slag grains is reduced to 4705 ppm-6880 ppm, Problems such as rupture can be effectively solved.
2. Controlling the particle size of the slag grains so as to satisfy the mesh can be achieved by polishing, and the advantages of cost reduction and processing speed can be obtained.
3. The nitrogen content in the slag grains is reduced, and the ammonia gas generation phenomenon of the refractory blank is also effectively reduced.
4. By controlling the particle size of the slag grains between 200 mesh and 400 mesh, surface refinement of the refractory brick is more excellent.
以上のように、本発明に係るアルミニウム集塵とアルミニウム金属製錬スラグ再利用方法によれば、有効に、従来の諸欠点を解消でき、スラグ粒の粒径を制御して、スラグ粒の窒素含有量を、有効に低下させ、また、上記スラグ粒を粘着剤水溶液に混合した後、有効に、水と窒化アルミニウムとの反応によってアンモニアガスが生成する現象を低減でき、そのため、耐火材ブランクや耐火材のクラックや破裂現象を低減でき、これにより、作製のコストダウンや耐火材表面の細緻化が良くなる効果が得られる。 As described above, according to the aluminum dust collection and aluminum metal smelting slag recycling method according to the present invention, it is possible to effectively eliminate the conventional drawbacks, control the particle diameter of the slag grains, After effectively reducing the content and mixing the slag particles with the adhesive aqueous solution, it is possible to effectively reduce the phenomenon that ammonia gas is generated due to the reaction between water and aluminum nitride. Cracks and rupture phenomena of the refractory material can be reduced, thereby obtaining the effects of reducing the production cost and improving the fineness of the surface of the refractory material.
そのため、本発明は、より進歩的かつより実用的で、法に従って特許を出願する。 As such, the present invention is more progressive and more practical and files patents according to law.
以上は、ただ、本発明のより良い実施例であり、本発明は、それによって制限されることが無く、本発明に係わる特許請求の範囲や明細書の内容に基づいて行った等価の変更や修正は、全てが、本発明の特許請求の範囲内に含まれる。 The above is merely a better embodiment of the present invention, and the present invention is not limited thereby, and equivalent changes made based on the scope of the claims and the description of the present invention. All modifications are within the scope of the claims of the present invention.
１ アルミニウム製錬スラグ
１ａ スラグ粒
１０ａ ４００メッシュのスラグ粒
２ 粘着剤
３ ブランク
４ 耐火材ブランク
５ 耐火材
DESCRIPTION OF SYMBOLS 1 Aluminum smelting slag 1a Slag grain 10a 400 mesh slag grain 2 Adhesive 3 Blank 4 Refractory material blank 5 Refractory material
Claims (3)
研磨した上記スラグ粒の粒径を２００メッシュ（ｍｅｓｈ）乃至４００メッシュ（ｍｅｓｈ）の範囲内にするステップ二と、
ステップ二の条件を満たすスラグ粒を粘着剤水溶液と混合してブランクを形成するステップ三と、
上記ブランクを加圧整形して、耐火材ブランクが形成されるステップ四と、
上記耐火材ブランクを１０５０℃〜１４５０℃の運転温度で焼結させ、徐冷して耐火材が形成されるステップ五と、を含み、
アルミニウムを溶解する過程でできるアルミニウム製錬スラグを回収してから前記ステップ四までの間に前記アルミ製錬スラグを加熱処理する工程は無い
ことを特徴とするアルミニウム集塵とアルミニウム製錬スラグ再利用方法。 Step 1 to grind aluminum smelting slag and process it into slag grains,
Step two you within the polished above slag grains 2 00 mesh particle size (mesh) to 400 mesh (mesh),
Step 3 for forming a blank by mixing slag particles satisfying the condition of Step 2 with an adhesive aqueous solution,
Step 4 in which the blank is pressurized and shaped to form a refractory blank,
The refractory material blank is sintered at a operating temperature of 1050 ° C. to 1450 ° C., and step five of refractory material is formed gradually cooled, only including,
There is no process of heat-treating the aluminum smelting slag after the recovery of the aluminum smelting slag formed in the process of melting aluminum until the step 4
Aluminum dust and aluminum smelting slag recycling method characterized by.
前記ステップ二において、更に、スラグ粒の窒素含有量を検出して、スラグ粒の窒素含有量が４４００ｐｐｍ〜７０００ｐｐｍの間にあることを確認する手順が備えられる
ことを特徴とするアルミニウム集塵とアルミニウム製錬スラグ再利用方法。 In aluminum dust and aluminum smelting slag recycling method according to claim 1,
In step 2, there is further provided a procedure for detecting the nitrogen content of the slag grains and confirming that the nitrogen content of the slag grains is between 4400 ppm and 7000 ppm. Aluminum dust collection and aluminum beam smelting slag recycling method.
前記粘着剤水溶液は、水とカルボキシメチルセルロースの混合溶液で、上記粘着剤添加量が３ｗｔ％〜１２ｗｔ％の範囲内にある
ことを特徴とするアルミニウム集塵とアルミニウム製錬スラグ再利用方法。
In aluminum dust and aluminum smelting slag recycling method according to claim 1 or claim 2,
The adhesive solution is a mixed solution of water and carboxymethyl cellulose, aluminum dust and aluminum smelting slag recycling method characterized by the adhesive quantity within the range of 3wt% ~12wt%.
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