CN103449485A - Method for continuously producing pseudoboehmite by using ejector - Google Patents

Method for continuously producing pseudoboehmite by using ejector Download PDF

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CN103449485A
CN103449485A CN 201310373875 CN201310373875A CN103449485A CN 103449485 A CN103449485 A CN 103449485A CN 201310373875 CN201310373875 CN 201310373875 CN 201310373875 A CN201310373875 A CN 201310373875A CN 103449485 A CN103449485 A CN 103449485A
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pseudoboehmite
ejector
method
continuously
metaaluminate
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CN 201310373875
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CN103449485B (en )
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丁安平
武建生
薛文忠
朱小龙
高晓辉
张红莉
李超
樊文贞
刘淑清
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中国铝业股份有限公司
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Abstract

The invention discloses a method for continuously producing pseudoboehmite by using an ejector, belonging to the technical field of boehmite preparation. The method comprises the following steps: continuously adding a sodium metaaluminate solution into the ejector, and introducing an air-carbon dioxide gas mixture into the ejector, and forming a strong liquid flow of the sodium metaaluminate solution to be thoroughly mixed with the carbon dioxide gas; controlling the flow rates of the gas mixture and the sodium metaaluminate solution to control the temperature of the slurry generated by reaction at 25-55 DEG C and the pH value at 9.5-11; and aging the slurry, filtering, washing with water to a neutral state, and drying to obtain the pseudoboehmite. The pseudoboehmite prepared by the method has the characteristics of large specific area and pore volume, reasonable peptization, continuous production, simple technique, high production efficiency, stable product quality, low equipment investment, low energy consumption, low labor intensity and the like, is reliable in operation, is convenient to operate and maintain, and is especially suitable for producing common pseudoboehmite, superfine aluminum hydroxide or aluminum oxide.

Description

ー种利用射流器连续生产拟薄水铝石的方法ー jet method using a continuous production of boehmite is pseudoboehmite

技术领域 FIELD

[0001] 本发明涉及铝石制备技术领域,特别涉及ー种利用射流器连续生产拟薄水铝石的方法。 [0001] Technical Field The present invention relates to the preparation of boehmite, particularly to a method using a kind of ejector ー continuous production of quasi boehmite. 背景技术 Background technique

[0002] 拟薄水铝石又称一水合氧化铝、假一水软铝石,无毒、无味、无臭、白色胶体状(湿品)或粉末(干品),晶相纯度高、胶溶性能好,粘结性强,具有比表面高、孔容大等特点,其含水态为触变性凝胶。 [0002] Also known as pseudoboehmite alumina monohydrate boehmite, pseudo boehmite a non-toxic, tasteless, odorless, white colloidal (wet) or a powder (dry product), high-crystal phase purity, gum good melting properties, strong adhesion, having a high specific surface area, pore volume and other characteristics, which form the aqueous thixotropic gel.

[0003] 拟薄水铝石的生产方法有多种:目前国外常采用醇铝法,产品质量高且孔结构很容易控制,但是生产成本高,存在环境污染;目前国内最经济、应用最广的是酸法或碱法。 [0003] The method of producing quasi boehmite are more of: aluminum alkoxides in foreign countries, often used method, high product quality and pore structure is easily controlled, but the high production costs, the presence of environmental pollution; currently the most economical and most widely It is acid or soda process. エ业上拟薄水铝石的生产方法主要包括如下三种: The method of producing quasi boehmite Ester industry include the following three:

[0004] (I)铝盐和碱的中和: [0004] (I) and the aluminum salt and a base:

[0005] A1C13+3NH30H->A1 (OH) 3+3NH4Cl [0005] A1C13 + 3NH30H-> A1 (OH) 3 + 3NH4Cl

[0006] (2)铝盐和偏铝酸钠的复分解反应法: [0006] (2) an aluminum salt and sodium aluminate metathesis reaction method:

[0007] Al2 (SO4) 3+6NaA102 + 12H20->8A1 (OH) 3 + 3Na2S04 [0007] Al2 (SO4) 3 + 6NaA102 + 12H20-> 8A1 (OH) 3 + 3Na2S04

[0008] (3)偏铝酸钠和酸的中和,如碳化法: [0008] (3) sodium aluminate and acid neutralization, as carbonization:

[0009] 2NaA102 + CO2 + 3H20->2A1 (OH) 3 + Na2CO3 [0009] 2NaA102 + CO2 + 3H20-> 2A1 (OH) 3 + Na2CO3

[0010] 其中,碳化法生产拟薄水铝石的过程如下:以低温低浓度的エ业铝酸钠溶液为原料,快速通入高浓度CO2气体作为沉淀剂中和成胶,控制成胶温度及終点的pH值,然后经升温、老化、洗涤、干燥,得到普通拟薄水铝石产品。 [0010] wherein carbonization quasi boehmite production process is as follows: Ester to a solution of sodium aluminum industry as a raw material of low temperature and low concentration, rapid high concentration into CO2 gas and as a precipitating agent into the gum drop temperature controlled and pH of the end point, and then by heating, aging, washed, and dried, to give ordinary quasi boehmite product.

[0011] 碳化法制备拟薄水铝石可以依托氧化铝厂,原料来源广泛、生产成本低,生产中的废液可以返回氧化铝生产流程再利用,基本无废料排出,环境污染小,由此得到了广泛的应用。 Pseudo [0011] SYSTEM carbonation can rely boehmite alumina plant, widely available raw material, low production cost, the waste liquid produced in the production process can be recycled to return alumina, substantially no waste discharge, environmental pollution, thereby It has been widely used. 但是,碳化法制备拟薄水铝石的过程多为间断生产,设备投资大、人员劳动强度大、生产率低,产品质量波动大。 However, the process of carbonization Preparation Method quasi boehmite more intermittent production, equipment investment, high labor intensity, low productivity, large fluctuations in product quality.

发明内容 SUMMARY

[0012] 为了解决现有碳化法制备拟薄水铝石的间断生产,劳动强度大、生产率低,以及产品质量波动大等问题,本发明提供了ー种利用射流器连续生产拟薄水铝石的方法,包括:将偏铝酸钠溶液连续地加入到射流器中,并将空气和ニ氧化碳的混合气体通入到所述射流器中,使偏铝酸钠溶液形成强劲的液流与ニ氧化碳气体进行充分混合;控制混合气体和偏铝酸钠溶液的流量,使反应生成的料浆温度为25-55°C,pH值为9.5-11 ;将料浆经过老化、过滤、水洗至中性及干燥处理,得到拟薄水铝石。 [0012] In order to solve the conventional production of carbonized intermittently Method Pseudo boehmite is labor intensive, low productivity, and fluctuations in product quality and other issues, the present invention provides a continuous jet ー seed production using quasi boehmite the method comprising: sodium aluminate solution is continuously added to the ejector, and the mixed gas of air and carbon oxides into ni to the ejector in the sodium aluminate solution stream and form a strong ni carbon dioxide gas mixed well; controlling the mixed gas and the flow rate of sodium aluminate solution, the slurry produced by the reaction temperature is 25-55 ° C, pH value of 9.5 to 11; the slurry after aging was filtered, washed with water until neutral and dried to give a quasi boehmite.

[0013] 所述偏铝酸钠溶液的氧化铝浓度为15-80g/L。 [0013] The concentration of alumina is sodium aluminate solution 15-80g / L.

[0014] 所述将料浆经过老化、过滤、水洗至中性及干燥处理的步骤具体包括: [0014] The slurry after the aging was filtered, washed with water until neutral and drying process step comprises:

[0015] 将料浆通入老化槽升温,控制老化温度不低于90°C ; [0015] The slurry was heated into aging tank, the aging temperature is controlled not lower than 90 ° C;

[0016] 将老化升温后的料浆过滤,滤饼水洗至中性;[0017] 将水洗后的滤饼进行干燥处理。 [0016] The heated slurry after aging was filtered, the filter cake was washed with water until neutral; [0017] The filter cake was washed with water after the drying process.

[0018] 所述干燥处理的干燥温度为100-120°C。 The drying temperature [0018] The drying treatment is 100-120 ° C.

[0019] 所述混合气体中二氧化碳的体积百分数为30%-100%,所述混合气体的压カ为0.1MPa -0.3MPa。 [0019] The volume percentage of carbon dioxide in the mixed gas of 30% to 100%, the pressure of the gas mixture ka is 0.1MPa -0.3MPa.

[0020] 所述射流器为单个射流器或由多个射流器串联构成。 [0020] The ejector is constructed as a single unit or in series by a plurality of jet ejector.

[0021] 所述混合气体和偏铝酸钠溶液的流量比值为10-100。 The [0021] mixture gas flow rate ratio and the sodium aluminate solution is 10-100.

[0022] 本发明的方法具有连续生产、エ艺简单、生产效率高、产品质量稳定、设备投资少、操作维护简便、运行可靠、能耗低及劳动强度小等特点,特别适用于普通拟薄水铝石或超细氢氧化铝、氧化铝的生产。 [0022] The method of the present invention having a continuous production, Ester simple process, high production efficiency, product quality and stability, low investment, operation and maintenance is simple, reliable, low energy consumption and labor intensity and other characteristics, especially suitable for ordinary pseudoboehmite ultrafine boehmite or aluminum hydroxide, alumina production. 通过本发明方法所制备的拟薄水铝石的比表面积大、孔容、胶溶均能够达到普通拟薄水铝石的质量标准。 Large surface area ratio of the quasi boehmite prepared by the process of the present invention, the pore volume, are able to meet quality peptized pseudoboehmite ordinary standard stone.

附图说明 BRIEF DESCRIPTION

[0023] 图1是本发明实施例的利用射流器连续生产拟薄水铝石的方法流程图。 [0023] FIG. 1 is a flowchart of an embodiment of the ejector of the present invention is intended for continuous production method of boehmite.

具体实施方式 detailed description

[0024] 下面结合附图和实施例,对本发明技术方案作进ー步描述。 [0024] accompanying drawings and the following embodiments, the technical solutions of the present invention will be further described ー feed.

[0025] 參见图1,本发明实施例提供了ー种利用射流器连续生产拟薄水铝石的方法,该方法包括如下步骤: [0025] Referring to Figure 1, embodiments of the present invention provides a method ー seed production using a continuous jet quasi boehmite, the method comprising the steps of:

[0026] 步骤101:将偏铝酸钠溶液连续地加入到射流器中,并将空气和ニ氧化碳的混合气体通入到该射流器中,使偏铝酸钠溶液形成强劲的液流与ニ氧化碳气体进行充分混合,实现偏铝酸钠溶液与ニ氧化碳气体的快速反应,产生多而细腻的气泡; [0026] Step 101: The sodium aluminate solution was continuously added to the ejector, and the mixed gas of air and carbon oxides ni jet into the vessel to the sodium aluminate solution stream and form a strong ni thorough mixing carbon dioxide gas, sodium aluminate solution to achieve the rapid reaction of carbon dioxide gas and Ni, and generate a plurality of fine bubbles;

[0027] 本实施例中,偏铝酸钠溶液的氧化铝浓度为15-80g/L ;混合气体中二氧化碳的体积百分数为30%-100%,混合气体的压カ为0.1MPa-0.3MPa ;在具体生产实践中,可以根据偏铝酸钠溶液的浓度,选择使用I个或多个射流器串联,通常低浓度时单个射流器可满足流量要求,氧化铝浓度大于40g/L时可以考虑使用多个射流器串联。 [0027] In this embodiment, the alumina concentration of sodium aluminate solution is 15-80g / L; volume percentage of carbon dioxide in the mixed gas of 30% to 100%, the pressure of the mixed gas ka 0.1MPa-0.3MPa; may be considered in particular when used in production practice, according to the concentration of the sodium aluminate solution, I choose to use one or more jets in series, a single jet may flow requirements to meet the normal low concentration, alumina concentration greater than 40g / L a plurality of jets connected in series.

[0028] 步骤102:控制混合气体和偏铝酸钠溶液的流量比值在10-100,使反应生成的料浆温度为25-55 °C,pH值为9.5-11,停止成胶; [0028] Step 102: the control gas mixture and sodium aluminate solution flow rate ratio of 10-100, the temperature of the slurry produced by the reaction is 25-55 ° C, pH value of 9.5 to 11, stopping gelation;

[0029] 步骤103:将料浆经过老化、过滤、水洗至中性及干燥处理,得到拟薄水铝石; [0029] Step 103: After the slurry aged, filtered, washed with water until neutral and dried to give a quasi boehmite;

[0030] 本实施例中,先将料浆通入老化槽升温,控制老化温度不低于90°C ;将老化升温后的料浆过滤,滤饼水洗至中性;再将水洗后的滤饼进行干燥处理,干燥温度为100-120°C,最終得到拟薄水铝石。 [0030] In this embodiment, the first slurry tank into heating aging, the aging temperature is controlled not lower than 90 ° C; the slurry after the aging was filtered warm and the filter cake washed with water to neutral; after filtration and then washed with water cake is dried, the drying temperature is 100-120 ° C, to give the final quasi boehmite.

[0031] 为了更加清楚地阐述本发明实施例的利用射流器连续生产拟薄水铝石的方法,下面通过几个典型的应用实施例来进ー步说明。 [0031] In order to more clearly set forth the use of the jet embodiment of the present invention, continuous production of quasi boehmite, the following examples several typical applications to further advance ー described.

[0032] 实施例1 [0032] Example 1

[0033] 将氧化铝浓度为15.9g/L的偏铝酸钠溶液通过泵连续地加入到射流器中,同时通入空气和ニ氧化碳的混合气体至该射流器中,混合气体中二氧化碳的体积百分数为30%,混合气体的压カ为0.3MPa,使偏铝酸钠溶液形成强劲的液流与ニ氧化碳气体进行充分混合,产生多而细腻的气泡;控制混合气体和偏铝酸钠溶液的流量比值为10,使反应生成的料浆温度为25°C及pH值为9.5时,停止成胶;将反应所得的料浆通过道输送至老化槽,料浆在老化槽内升温,老化温度为90°C ;将老化后的料浆过滤,滤饼水洗至中性;将水洗后的滤饼进行烘干处理,烘干温度为100°C,最終得到普通拟薄水铝石产品,其物化性质见下表I。 [0033] The alumina concentration of 15.9g / L of sodium aluminate solution was continuously added by the pump to the ejector while a gas mixture of air and carbon monoxide to ni in the ejector, a mixed gas of carbon dioxide volume percentage of 30%, a mixed gas pressure of 0.3MPa ka, so that sodium aluminate solution stream and form a strong carbon dioxide gas ni sufficiently mixed, and fine bubbles generate multiple; control gas mixture and sodium aluminate solution flow rate ratio of 10, the temperature of the slurry produced by the reaction is 25 ° C and a pH of 9.5, the gelation is stopped; the resulting reaction slurry delivered to the aging tank through the channel, heating the slurry in the aging tank, the aging temperature was 90 ° C; the slurry after aging was filtered, the filter cake was washed with water to neutrality; the filter cake was washed with water after the drying process, the drying temperature is 100 ° C, to give the final ordinary quasi boehmite product its physical and chemical properties following table I.

[0034] 实施例2 [0034] Example 2

[0035] 将氧化铝浓度为25.2g/L的偏铝酸钠溶液通过泵连续地加入到射流器中,同时通入空气和ニ氧化碳的混合气体至该射流器中,混合气体中二氧化碳的体积百分数为40%,混合气体的压カ为0.2MPa,使偏铝酸钠溶液形成强劲的液流与ニ氧化碳气体进行充分混合,产生多而细腻的气泡;控制混合气体和偏铝酸钠溶液的流量比值为30,使反应生成的料浆温度为30°C及pH值为9.5时,停止成胶;将反应所得的料浆通过管道输送至老化槽,料浆在老化槽内升温,老化温度为95°C ;将老化后的料浆过滤,滤饼水洗至中性;将水洗后的滤饼进行烘干处理,烘干温度为102°C,最終得到普通拟薄水铝石产品,其物化性质见下表I。 [0035] The alumina concentration of 25.2g / L of sodium aluminate solution added continuously via a pump to the ejector while passing air and a mixed gas of carbon monoxide ni jet into the vessel, the mixed gas of carbon dioxide volume percentage of 40%, the pressure is 0.2MPa ka mixed gas, that the sodium aluminate solution stream and form a strong carbon dioxide gas ni sufficiently mixed, and fine bubbles generate multiple; control gas mixture and sodium aluminate the flow rate ratio of the solution was 30, the temperature of the slurry produced by the reaction is 30 ° C and a pH of 9.5, the gelation is stopped; the resulting reaction slurry was conveyed through the conduit to the aging tank, heating the slurry in the aging tank, the aging temperature was 95 ° C; the slurry after aging was filtered, the filter cake was washed with water to neutrality; the filter cake was washed with water after the drying process, the drying temperature is 102 ° C, to give the final ordinary quasi boehmite product its physical and chemical properties following table I.

[0036] 实施例3 [0036] Example 3

[0037] 将氧化铝浓度为33.6g/L的偏铝酸钠溶液通过泵连续地加入到射流器中,同时通入空气和ニ氧化碳的混合气体至该射流器中,混合气体中二氧化碳的体积百分数为50%,混合气体的压カ为0.15MPa,使偏铝酸钠溶液形成强劲的液流与ニ氧化碳气体进行充分混合,产生多而细腻的气泡;控制混合气体和偏铝酸钠溶液的流量比值为40,使反应生成的料浆温度为35°C及pH值为10时,停止成胶;将反应所得的料浆通过管道输送至老化槽,浆料在老化槽内升温,老化温度为100°C;将老化后的料浆过滤,滤饼水洗至中性;将水洗后的滤饼进行烘干处理,烘干温度为105°C,最終得到普通拟薄水铝石产品,其物化性质见下表I。 [0037] The alumina concentration of 33.6g / L of sodium aluminate solution was continuously added by the pump to the ejector while a gas mixture of air and carbon monoxide to ni in the ejector, a mixed gas of carbon dioxide volume percentage is 50%, the pressure of 0.15 MPa ka mixed gas, that the sodium aluminate solution stream and form a strong carbon dioxide gas ni sufficiently mixed, and fine bubbles generate multiple; control gas mixture and sodium aluminate the flow rate ratio of the solution was 40, the temperature of the slurry produced by the reaction is 35 ° C and pH at 10, the gelation is stopped; the resulting reaction slurry was conveyed through the conduit to the aging tank, the slurry heated in the aging tank, the aging temperature is 100 ° C; the slurry after aging was filtered, the filter cake was washed with water to neutrality; the filter cake was washed with water after the drying process, the drying temperature is 105 ° C, to give the final ordinary quasi boehmite product its physical and chemical properties following table I.

[0038] 实施例4 [0038] Example 4

[0039] 将氧化铝浓度为40.4g/L的偏铝酸钠溶液通过泵连续地加入到射流器中,同时通入空气和ニ氧化碳的混合气体至该射流器中,混合气体中二氧化碳的体积百分数为60%,混合气体的压カ为0.15MPa,使偏铝酸钠溶液形成强劲的液流与ニ氧化碳气体进行充分混合,产生多而细腻的气泡;控制混合气体和偏铝酸钠溶液的流量比值为50,使反应生成的料浆温度为40°C及pH值为10时,停止成胶;将反应所得的料浆通过管道输送至老化槽,料浆在老化槽内升温,老化温度为100°C;将老化后的料浆过滤,滤饼水洗至中性;将水洗后的滤饼进行烘干处理,烘干温度为110°C,最終得到普通拟薄水铝石产品,其物化性质见下表I。 [0039] The alumina concentration of 40.4g / L of sodium aluminate solution was continuously added by the pump to the ejector while a gas mixture of air and carbon monoxide to ni in the ejector, a mixed gas of carbon dioxide volume percentage of 60%, the pressure of 0.15 MPa ka mixed gas, that the sodium aluminate solution stream and form a strong carbon dioxide gas ni sufficiently mixed, and fine bubbles generate multiple; control gas mixture and sodium aluminate the flow rate ratio of the solution was 50, the temperature of the slurry produced by the reaction and 40 ° C for a pH of 10, to stop acacia; the resulting reaction slurry delivered to the aging tank through a pipe, the slurry heated in the aging tank, the aging temperature is 100 ° C; the slurry after aging was filtered, the filter cake was washed with water to neutrality; the filter cake was washed with water after the drying process, the drying temperature is 110 ° C, to give the final ordinary quasi boehmite product its physical and chemical properties following table I.

[0040] 实施例5 [0040] Example 5

[0041] 将氧化铝浓度为55.3g/L的偏铝酸钠溶液通过泵连续地加入到射流器中,同时通入空气和ニ氧化碳的混合气体至该射流器中,混合气体中二氧化碳的体积百分数为70%,混合气体的压カ为0.14MPa,使偏铝酸钠溶液形成强劲的液流与ニ氧化碳气体进行充分混合,产生多而细腻的气泡;控制混合气体和偏铝酸钠溶液的流量比值为60,使反应生成的料浆温度为45°C和pH值为11时,停止成胶;将反应所得的料浆通过管道输送至老化槽,料浆在老化槽内升温,老化温度为102°C;将老化后的料浆过滤,滤饼水洗至中性;将水洗后的滤饼进行烘干处理,烘干温度为115°C,最終得到普通拟薄水铝石产品,其物化性质见下表I。 [0041] The alumina concentration of 55.3g / L of sodium aluminate solution was continuously added by the pump to the ejector while a gas mixture of air and carbon monoxide to ni in the ejector, a mixed gas of carbon dioxide volume percentage of 70%, the pressure is 0.14MPa ka mixed gas, that the sodium aluminate solution stream and form a strong carbon dioxide gas ni sufficiently mixed, and fine bubbles generate multiple; control gas mixture and sodium aluminate the flow rate ratio of the solution was 60, the temperature of the slurry produced by the reaction is 45 ° C and a pH of 11, to stop acacia; the resulting reaction slurry was conveyed through the conduit to the aging tank, heating the slurry in the aging tank, the aging temperature is 102 ° C; the slurry after aging was filtered, the filter cake was washed with water to neutrality; the filter cake was washed with water after the drying process, the drying temperature is 115 ° C, to give the final ordinary quasi boehmite product its physical and chemical properties following table I.

[0042] 实施例6 [0042] Example 6

[0043] 将氧化铝浓度为64.7g/L的偏铝酸钠溶液通过泵连续地加入到射流器中,同时通入空气和ニ氧化碳的混合气体至该射流器中,混合气体中二氧化碳的体积百分数为80%,混合气体的压カ为0.13MPa,使偏铝酸钠溶液形成强劲的液流与ニ氧化碳气体进行充分混合,产生多而细腻的气泡;控制混合气体和偏铝酸钠溶液的流量比值为80,使反应生成的料浆温度为50°C及pH值为11时,停止成胶;将反应所得的料浆通过管道输送至老化槽,料浆在老化槽内升温,老化温度为95°C ;将老化后的料浆过滤,滤饼水洗至中性;将水洗后的滤饼进行烘干处理,烘干温度为120°C,最終得到普通拟薄水铝石产品,其物化性质见下表I。 [0043] The alumina concentration in the mixed gas of carbon dioxide was 64.7g / L of sodium aluminate solution added continuously via a pump to the ejector while a gas mixture of air and carbon monoxide to ni in the ejector, the volume percentage of 80%, the pressure is 0.13MPa ka mixed gas, so that sodium aluminate solution stream and form a strong carbon dioxide gas ni sufficiently mixed, and fine bubbles generate multiple; control gas mixture and sodium aluminate the flow rate ratio of the solution was 80, the temperature of the slurry produced by the reaction is 50 ° C and a pH of 11, to stop acacia; the resulting reaction slurry was conveyed through the conduit to the aging tank, heating the slurry in the aging tank, the aging temperature was 95 ° C; the slurry after aging was filtered, the filter cake was washed with water to neutrality; the filter cake was washed with water after the drying process, the drying temperature is 120 ° C, to give the final ordinary quasi boehmite product its physical and chemical properties following table I.

[0044] 实施例7 [0044] Example 7

[0045] 将氧化铝浓度为73.5g/L的偏铝酸钠溶液通过泵连续地加入到射流器中,同时通入空气和二氧化碳的混合气体至该射流器中,混合气体中二氧化碳的体积百分数为100%,混合气体的压カ为0.12MPa,使偏铝酸钠溶液形成强劲的液流与二氧化碳气体进行充分混合,产生多而细腻的气泡;控制混合气体和偏铝酸钠溶液的流量比值为90,使反应生成的料浆温度为55°C及pH值为11时,停止成胶;将反应所得的料浆通过管道输送至老化槽,料浆在老化槽内升温,老化温度为97°C ;将老化后的料浆过滤,滤饼水洗至中性;将水洗后的滤饼进行烘干处理,烘干温度为120°C,最終得到普通拟薄水铝石产品,其物化性质见下表 [0045] The alumina concentration of 73.5g / L of sodium aluminate solution added continuously via a pump to the ejector while a gas mixture of air and carbon dioxide to the ejector, the volume percentage of carbon dioxide in the mixed gas 100%, the pressure is 0.12MPa ka mixed gas, so that a solution of sodium aluminate with carbon dioxide to form a strong flow of mixed gas, and multiple fine bubbles generated; controlling the flow rate ratio of the mixed gas and the sodium aluminate solution 90, the temperature of the slurry produced by the reaction is 55 ° C and a pH of 11, to stop acacia; the resulting reaction slurry delivered to the aging tank through a conduit, heating the slurry in the aging tank, the aging temperature is 97 ° C; the slurry after aging was filtered, the filter cake was washed with water to neutrality; the filter cake was washed with water after the drying process, the drying temperature is 120 ° C, to give the final ordinary quasi boehmite product which physicochemical properties the table below

Figure CN103449485AD00061

[0046] 实施例8 [0046] Example 8

[0047] 将氧化铝浓度为80g/L的偏铝酸钠溶液通过泵连续地加入到射流器中,同时通入空气和二氧化碳的混合气体至该射流器中,混合气体中二氧化碳的体积百分数为100%,混合气体的压カ为0.1MPa,使偏铝酸钠溶液形成强劲的液流与二氧化碳气体进行充分混合,产生多而细腻的气泡;控制混合气体和偏铝酸钠溶液的流量比值为100,使反应生成的料浆温度为55°C及pH值为10.5时,停止成胶;将反应所得的料浆通过管道输送至老化槽,料浆在老化槽内升温,老化温度为94°C ;将老化后的料浆过滤,滤饼水洗至中性;将水洗后的滤饼进行烘干处理,烘干温度为120°C,最終得到普通拟薄水铝石产品,其物化性质见下表 [0047] The alumina concentration was 80g / L of sodium aluminate solution was continuously added by the pump to the ejector while a gas mixture of air and carbon dioxide to the ejector, the volume percent of carbon dioxide mixed gas 100%, the pressure is 0.1MPa ka mixed gas, so that a solution of sodium aluminate with carbon dioxide to form a strong flow of mixed gas, and produce multiple fine bubbles; and controlling the flow rate ratio of a mixed gas of sodium aluminate solution was 100, the temperature of the slurry produced by the reaction is 55 ° C and a pH of 10.5, stopping gelation; the resulting reaction slurry delivered to the aging tank through a conduit, heating the slurry in the aging tank, the aging temperature is 94 ° C; the slurry after aging was filtered, the filter cake was washed with water to neutrality; the filter cake was washed with water after the drying process, the drying temperature is 120 ° C, to give the final ordinary quasi boehmite product which physicochemical properties see The following table

[0048]表1 [0048] TABLE 1

Figure CN103449485AD00062

[0051] 由表I可以看出,通过本实施例的方法所制备的拟薄水铝石,比表面积大,孔容、胶溶均能够达到普通拟薄水铝石的质量标准。 [0051] As can be seen from Table I, quasi-boehmite prepared by the method of the present embodiment, the large specific surface area, pore volume, are able to meet quality peptized pseudoboehmite ordinary standard stone. 表I中孔容和比表面积的分析,可以采用低温液氮吸附法来完成。 Table I pore volume and specific surface area analysis can be employed to complete the N2 adsorption method. (注:普通拟薄水铝石质量标准Q/Chalco A020— 2004中,胶溶≤95%,比表面≤250m2/g,孔容≤0.3ml/L) (Note: Quasi Normal standard boehmite mass Q / Chalco A020- 2004, the peptized ≤95%, a specific surface ≤250m2 / g, a pore volume ≤0.3ml / L)

[0052] 本实施例通过泵连续地将偏铝酸钠溶液加入到射流器中,克服了拟薄水铝石间断生产的缺陷,具有连续生产、エ艺简单、设备投资少、操作维护简便、运行可靠、能耗低及劳动强度小等特点,提高了劳动生成率,稳定了产品质量,特别适用于普通拟薄水铝石或超细氢氧化铝、氧化铝的生产。 [0052] The present embodiment is continuously added a solution of sodium aluminate by the pump to the ejector has overcome discontinuities quasi boehmite production defects, having a continuous production, Ester simple process, low investment, easy operation and maintenance, reliable, low energy consumption and labor intensity and other characteristics, improve labor production rate, product quality stability, particularly intended for general ultrafine boehmite or aluminum hydroxide, alumina production. [0053] 以上所述的具体实施例,对本发明的目的、技术方案和有益效果进行了进ー步详细说明,所应理解的是,以上所述仅为本发明的具体实施例而已,并不用于限制本发明,凡在本发明的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。 [0053] The foregoing specific embodiments of the object, technical solutions, and advantages of the invention will be described in further detail in the intake ー, should be appreciated that the above descriptions are merely embodiments of the present invention only, not with to limit the present invention within the spirit and principle of the present invention, any modifications, equivalent replacements, improvements, etc., it should be included within the scope of the present invention. ` `

Claims (7)

  1. 1.ー种利用射流器连续生产拟薄水铝石的方法,其特征在于,包括: 将偏铝酸钠溶液连续地加入到射流器中,并将空气和ニ氧化碳的混合气体通入到所述射流器中,使偏铝酸钠溶液形成强劲的液流与ニ氧化碳气体进行充分混合;控制混合气体和偏铝酸钠溶液的流量,使反应生成的料浆温度为25-55°C,pH值为9.5-11 ;料浆经过老化、过滤、水洗至中性及干燥处理,得到拟薄水铝石。 1. ー species using the method of the ejector quasi boehmite continuous production, characterized by comprising: a sodium aluminate solution is continuously added to the ejector, and the mixed gas of air and carbon dioxide is passed into ni the ejector in the sodium aluminate solution stream and form a strong carbon dioxide gas mixed well ni; gas flow rate and controlling the mixing sodium aluminate solution, the slurry produced by the reaction temperature is 25-55 ° C, pH value of 9.5-11; slurry after aging was filtered, washed with water until neutral and dried to give a quasi boehmite.
  2. 2.如权利要求1所述的利用射流器连续生产拟薄水铝石的方法,其特征在于,所述偏铝酸钠溶液的氧化铝浓度为15-80g/L。 2. The use of the ejector according to claim 1 for continuous production method of quasi boehmite, characterized in that the partial sodium aluminate solution alumina concentration of 15-80g / L.
  3. 3.如权利要求1所述的利用射流器连续生产拟薄水铝石的方法,其特征在于,所述将料浆经过老化、过滤、水洗至中性及干燥处理的步骤具体包括: 将料浆通入老化槽升温,控制老化温度不低于90°C ; 将老化升温后的料浆过滤,滤饼水洗至中性; 将水洗后的滤饼进行干燥处理。 3. The use of the ejector according to claim 1 for continuous production method of quasi boehmite, characterized in that said slurry after the aging was filtered, washed with water until neutral and drying process step comprises: a feed heating the slurry into the aging tank, the aging temperature is controlled not lower than 90 ° C; the slurry after the aging was filtered warm and the filter cake washed with water to neutrality; the filter cake was washed with water after the drying process.
  4. 4.如权利要求3所述的利用射流器连续生产拟薄水铝石的方法,其特征在干,所述干燥处理的干燥温度为100-120°C。 4. The use of the ejector according to claim 3, wherein the continuous production of boehmite is pseudoboehmite, characterized in that the dry, a drying temperature of the drying treatment is 100-120 ° C.
  5. 5.如权利要求1所述的利用射流器连续生产拟薄水铝石的方法,其特征在于,所述混合气体中ニ氧化碳的体积百分数为30%-100%,所述混合气体的压カ为0.1MPa-0.3MPa。 5. The use of the ejector according to claim 1 for continuous production method of quasi boehmite, characterized in that the volume percentage of carbon monoxide in the mixed gas is 30% Ni 100%, the pressure of the mixed gas ka is 0.1MPa-0.3MPa.
  6. 6.如权利要求1所述的利用射流器连续生产拟薄水铝石的方法,其特征在于,所述射流器为单个射流器或由多个射流器串联构成。 6. The use of the ejector according to claim 1 for continuous production method of the quasi boehmite, wherein the single ejector is a jet or a series constituted by a plurality of jets.
  7. 7.如权利要求1所述的利用射流器连续生产拟薄水铝石的方法,其特征在于,所述混合气体和偏铝酸钠溶液的流量比值为10-100。 7. The use of the ejector according to claim 1 quasi boehmite continuous production process, wherein the mixed gas flow rate ratio and the sodium aluminate solution is 10-100.
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