CN115215365A - Method for generating and separating gypsum from titanium extraction tailings - Google Patents
Method for generating and separating gypsum from titanium extraction tailings Download PDFInfo
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- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 119
- 239000010440 gypsum Substances 0.000 title claims abstract description 119
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 69
- 239000010936 titanium Substances 0.000 title claims abstract description 69
- 238000000605 extraction Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 48
- 239000002002 slurry Substances 0.000 claims abstract description 191
- 238000000926 separation method Methods 0.000 claims abstract description 48
- 238000001914 filtration Methods 0.000 claims abstract description 40
- 238000002386 leaching Methods 0.000 claims abstract description 39
- 238000003756 stirring Methods 0.000 claims abstract description 28
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 239000000654 additive Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 230000005484 gravity Effects 0.000 claims abstract description 14
- 230000000996 additive effect Effects 0.000 claims abstract description 9
- 230000000382 dechlorinating effect Effects 0.000 claims abstract 2
- 239000012065 filter cake Substances 0.000 claims description 47
- 238000001354 calcination Methods 0.000 claims description 11
- 238000006298 dechlorination reaction Methods 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 8
- 239000007790 solid phase Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 7
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 239000002893 slag Substances 0.000 description 13
- 239000013078 crystal Substances 0.000 description 6
- 238000004445 quantitative analysis Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012066 reaction slurry Substances 0.000 description 1
- PANBYUAFMMOFOV-UHFFFAOYSA-N sodium;sulfuric acid Chemical compound [Na].OS(O)(=O)=O PANBYUAFMMOFOV-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/005—Preparing or treating the raw materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/02—Methods and apparatus for dehydrating gypsum
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
- C04B11/262—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke waste gypsum other than phosphogypsum
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
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- Organic Chemistry (AREA)
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Abstract
Description
技术领域technical field
本发明涉及固废处理及资源化利用技术领域，更具体地，特别是指由提钛尾渣生成并分离石膏的方法。The invention relates to the technical field of solid waste treatment and resource utilization, and more particularly, to a method for generating and separating gypsum from titanium extraction tailings.
背景技术Background technique
现有技术中，高炉渣提钛后会获取提钛尾渣，提钛尾渣具有较好的水化活性，但其氯离子含量高达3％，远高于矿渣微粉要求的0.06％。因此需要对提钛尾渣进行脱氯处理，即将提钛尾渣加入添加剂浸出反应后，过滤，滤饼进行煅烧，可大幅降低氯离子含量。In the prior art, titanium extraction tailings are obtained after titanium extraction from blast furnace slag, and the titanium extraction tailings have good hydration activity, but their chloride ion content is as high as 3%, much higher than the 0.06% required for slag micropowder. Therefore, it is necessary to carry out dechlorination treatment on the titanium extraction tailings, that is, after adding the titanium extraction tailings to the leaching reaction with additives, filtering, and calcining the filter cake, the chloride ion content can be greatly reduced.
然而，在对提钛尾渣进行脱氯处理过程中，尾渣与添加剂反应形成了大量石膏，而石膏含大量结晶水，其晶体颗粒细，呈长条纤维状，粘度大，影响压滤性能，使得滤饼含水率高，后续耗费大量煅烧能耗。However, in the process of dechlorination of titanium extraction tailings, the tailings react with additives to form a large amount of gypsum, and the gypsum contains a large amount of crystal water, and its crystal particles are fine, long and fibrous, and the viscosity is large, which affects the filter press performance. , so that the moisture content of the filter cake is high, and the subsequent calcination consumes a lot of energy.
现有技术中尚未存在克服该技术问题的方案。There is no solution to overcome this technical problem in the prior art.
发明内容SUMMARY OF THE INVENTION
有鉴于此，本发明实施例的目的在于提出一种由提钛尾渣生成并分离石膏的方法，通过分离提钛尾渣中的石膏，进而降低滤饼中结晶水的含量，从而节约了后续煅烧步骤的能耗。In view of this, the purpose of the embodiments of the present invention is to propose a method for generating and separating gypsum from titanium extraction tailings, by separating the gypsum in the titanium extraction tailings, thereby reducing the content of crystal water in the filter cake, thereby saving subsequent Energy consumption of the calcination step.
基于上述目的，本发明实施例的一方面提供了一种由提钛尾渣生成并分离石膏的方法，包括以下步骤：(1)浆料浸出：向提钛尾渣中加入水和添加剂，浸出反应后得到尾渣浆料；其中，所述浸出反应的过程生成石膏；(2)浆料搅拌：将所述尾渣浆料搅拌均匀；(3)浆料分离：通过渣浆泵将所述尾渣浆料送至水力旋流器进行重选分离，以得到底流尾渣浆料和溢流石膏浆料；(4)浆料过滤：将所述溢流石膏浆料过滤得到石膏。Based on the above purpose, one aspect of the embodiments of the present invention provides a method for generating and separating gypsum from titanium extraction tailings, comprising the following steps: (1) slurry leaching: adding water and additives to the titanium extraction tailings, leaching out After the reaction, tailings slurry is obtained; wherein, gypsum is generated in the process of the leaching reaction; (2) slurry stirring: the tailings slurry is stirred evenly; (3) slurry separation: the slurry is separated by a slurry pump. The tailings slurry is sent to a hydrocyclone for gravity separation to obtain underflow tailings slurry and overflow gypsum slurry; (4) Slurry filtration: filter the overflow gypsum slurry to obtain gypsum.
在一些实施方式中，所述添加剂用于对所述提钛尾渣进行脱氯。In some embodiments, the additive is used to dechlorinate the titanium extraction tailings.
在一些实施方式中，所述尾渣浆料中固相的质量分数为10％～50％。In some embodiments, the mass fraction of the solid phase in the tailings slurry is 10% to 50%.
在一些实施方式中，所述固相中的石膏按质量含量的百分比为3～20％。In some embodiments, the percentage by mass of the gypsum in the solid phase is 3-20%.
在一些实施方式中，在所述(3)浆料分离步骤中，所述重选分离的级数≥1。In some embodiments, in the (3) slurry separation step, the number of stages of the re-selection separation is ≥1.
在一些实施方式中，所述水力旋流器的直径为60-300mm；以及所述水力旋流器上沉沙嘴的直径为10-40mm。In some embodiments, the diameter of the hydrocyclone is 60-300 mm; and the diameter of the grit spout on the hydrocyclone is 10-40 mm.
在一些实施方式中，在所述(3)浆料分离步骤中，给料压力为0.05-0.3MPa。In some embodiments, in the (3) slurry separation step, the feeding pressure is 0.05-0.3 MPa.
在一些实施方式中，在所述(4)浆料过滤步骤中，将所述溢流石膏浆料过滤得到石膏，包括：通过常压箱式板框压滤机对所述溢流石膏浆料进行过滤，得到石膏。In some embodiments, in the (4) slurry filtering step, filtering the overflow gypsum slurry to obtain gypsum, comprising: filtering the overflow gypsum slurry through an atmospheric pressure box-type plate and frame filter press Filtration was carried out to obtain gypsum.
本发明实施例的另一方面，提供了一种提钛尾渣深脱氯的方法，包括以下步骤：(1)浆料浸出：向提钛尾渣中加入水和添加剂，浸出反应后得到尾渣浆料；其中，所述浸出反应的过程生成石膏；以及所述添加剂用于对所述提钛尾渣进行脱氯；(2)浆料搅拌：将所述尾渣浆料搅拌均匀；(3)浆料分离：通过渣浆泵将所述尾渣浆料送至水力旋流器进行重选分离，以得到底流尾渣浆料和溢流石膏浆料；(4)浆料过滤：将所述底流尾渣浆料过滤得到尾渣滤饼；(5)滤饼煅烧：将所述尾渣滤饼进行煅烧。Another aspect of the embodiments of the present invention provides a method for deep dechlorination of tailings of titanium extraction, comprising the following steps: (1) slurry leaching: adding water and additives to the tailings of titanium extraction, and obtaining tailings after leaching reaction slag slurry; wherein, gypsum is generated in the process of the leaching reaction; and the additive is used for dechlorination of the titanium extraction tailings; (2) slurry stirring: stirring the tailings slurry uniformly; ( 3) Slurry separation: the tailings slurry is sent to a hydrocyclone by a slurry pump for gravity separation to obtain underflow tailings slurry and overflow gypsum slurry; (4) Slurry filtration: the The underflow tailings slurry is filtered to obtain a tailings filter cake; (5) filter cake calcination: the tailings filter cake is calcined.
在一些实施方式中，在所述(4)浆料过滤步骤中，将所述底流尾渣浆料过滤得到尾渣滤饼，包括：通过常压箱式板框压滤机对所述底流尾渣浆料进行过滤，得到尾渣滤饼。In some embodiments, in the (4) slurry filtration step, filtering the underflow tailings slurry to obtain a tailings filter cake, comprising: filtering the underflow tails through an atmospheric pressure box-type plate and frame filter press The slag slurry is filtered to obtain a tailings filter cake.
本发明具有以下有益技术效果：通过将加入脱氯剂后的除钛尾渣，以预设力度送入预设尺寸的水力旋流器，进行搅拌、分离操作，获得较高纯度的石膏和滤饼；石膏可以用做材料，滤饼经煅烧后可获得矿渣微粉；除钛尾渣中的结晶水大部分随石膏一起被分离出来，滤饼含水量较低，降低了煅烧能耗从而节约了煅烧成本。The invention has the following beneficial technical effects: the titanium-removing tailings after adding the dechlorination agent are fed into a hydrocyclone with a preset size with a preset force, and stirring and separation operations are performed to obtain high-purity gypsum and filter Gypsum can be used as a material, and slag powder can be obtained after the filter cake is calcined; most of the crystal water in the titanium tailings is separated with the gypsum, and the water content of the filter cake is low, which reduces the energy consumption of calcination and saves energy. Calcination cost.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的实施例。In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other embodiments can also be obtained according to these drawings without creative efforts.
图1为本发明提供的由提钛尾渣生成并分离石膏的方法的流程图。Fig. 1 is the flow chart of the method for generating and separating gypsum from titanium extraction tailings provided by the present invention.
具体实施方式Detailed ways
为使本发明的目的、技术方案和优点更加清楚明白，以下结合具体实施例，并参照附图，对本发明实施例进一步详细说明。In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention will be further described in detail below with reference to the specific embodiments and the accompanying drawings.
根据需要，本发明说明书中公开了本发明的具体实施例；然而，应当理解在此公开的实施例仅为可通过多种、可替代形式实施的本发明的示例。在下文的描述中，在构想的多个实施例中描述了多个操作参数和部件。这些具体的参数和部件在本说明书中仅作为示例而并不意味着限定。As required, specific embodiments of this invention are disclosed in this specification; however, it is to be understood that the embodiments disclosed herein are merely exemplary of the invention that may be embodied in various and alternative forms. In the following description, various operating parameters and components are described in various embodiments contemplated. These specific parameters and components are presented in this specification as examples only and are not meant to be limiting.
基于上述目的，本发明实施例的第一个方面，提出了一种由提钛尾渣生成并分离石膏的方法的实施例。图1示出的是本发明提供的由提钛尾渣生成并分离石膏的方法的流程图。如图1所示，由提钛尾渣生成并分离石膏的方法包括如下步骤：(1)浆料浸出：向提钛尾渣中加入水和添加剂，浸出反应后得到尾渣浆料；其中，浸出反应的过程生成石膏；(2)浆料搅拌：将尾渣浆料搅拌均匀；(3)浆料分离：通过渣浆泵将尾渣浆料送至水力旋流器进行重选分离，以得到底流尾渣浆料和溢流石膏浆料；(4)浆料过滤：将溢流石膏浆料过滤得到石膏。可以得到的是，尾渣浆液中石膏结晶粒度小，密度轻，而尾渣粒度大，密度重，通过搅拌使二者在矿浆中充分分散，经重选设备可实现分离。本发明通过对提钛尾渣中的石膏进行分离过滤，操作方式环保易行，获得了较高纯度的石膏，提高了提钛尾渣的资源利用率，为高炉渣提钛产业带来了更多的经济效益。Based on the above purpose, the first aspect of the embodiments of the present invention provides an embodiment of a method for generating and separating gypsum from titanium extraction tailings. Figure 1 shows a flow chart of the method for generating and separating gypsum from titanium extraction tailings provided by the present invention. As shown in Fig. 1, the method for generating and separating gypsum from titanium-extracting tailings includes the following steps: (1) slurry leaching: adding water and additives to titanium-extracting tailings, and obtaining tailings slurry after leaching reaction; wherein, The process of leaching reaction generates gypsum; (2) slurry stirring: the tailings slurry is stirred evenly; (3) slurry separation: the tailings slurry is sent to a hydrocyclone by a slurry pump for re-selection and separation, and Underflow tailings slurry and overflow gypsum slurry are obtained; (4) slurry filtration: filter the overflow gypsum slurry to obtain gypsum. It can be obtained that the gypsum crystal size in the tailings slurry is small and the density is light, while the size of the tailings is large and the density is heavy. The two can be fully dispersed in the slurry by stirring, and the separation can be realized by the gravity separation equipment. By separating and filtering the gypsum in the titanium extraction tailing slag, the operation method is environmentally friendly and easy to operate, obtains gypsum of higher purity, improves the resource utilization rate of the titanium extraction tailings, and brings more advantages to the titanium extraction industry from blast furnace slag. many economic benefits.
在一些实施方式中，添加剂用于对提钛尾渣进行脱氯。其中，提钛尾渣是指含钛高炉渣进行提钛后所得到的废渣。需要说明的是，现有技术中提钛尾渣具有较好的水化活性，但其氯离子含量高达3％，远高于矿渣微粉要求的0.06％。因此，需要对提钛尾渣进行脱氯处理。可选的，在(1)浆料浸出步骤中，所加水的量与提钛尾渣的质量之比为1:1～6:1，添加剂的种类可以包括以下至少之一：硫酸铵、硫酸钠、硫酸铝、硫酸铁，添加剂的量可以为提钛尾渣质量的3％～15％。In some embodiments, the additive is used to dechlorinate the titanium stripping tailings. Among them, the titanium tailings refer to the waste slag obtained after the titanium-containing blast furnace slag is subjected to titanium extraction. It should be noted that the titanium extraction tailings in the prior art have good hydration activity, but the chloride ion content is as high as 3%, which is much higher than the 0.06% required for the slag micropowder. Therefore, it is necessary to perform dechlorination treatment on the tailings of titanium extraction. Optionally, in (1) the slurry leaching step, the ratio of the amount of added water to the mass of the titanium tailings is 1:1 to 6:1, and the types of additives may include at least one of the following: ammonium sulfate, sulfuric acid Sodium, aluminum sulfate, ferric sulfate, and the amount of the additives can be 3% to 15% of the mass of the titanium tailings.
在上述实施例的基础上，本发明的实施方式还可以包括：在(3)浆料分离步骤中，重选分离的级数≥1。进一步的，水力旋流器的直径为60-300mm；以及水力旋流器上沉沙嘴的直径为10-40mm。再进一步的，在(3)浆料分离步骤中，给料压力为0.05-0.3MPa。本发明将尾渣浆液混匀后，送入水力旋流器分离，石膏主要进入溢流中，而提钛尾渣则进入底流中，通过合理控制压力、旋流器直径和沉沙嘴尺寸，可获得理想的分离效果。On the basis of the above-mentioned embodiments, the embodiments of the present invention may further include: in (3) the slurry separation step, the number of stages of re-selection separation is greater than or equal to 1. Further, the diameter of the hydrocyclone is 60-300mm; and the diameter of the sand settling nozzle on the hydrocyclone is 10-40mm. Still further, in (3) the slurry separation step, the feeding pressure is 0.05-0.3 MPa. In the invention, after the tailing slag slurry is uniformly mixed, it is sent to a hydrocyclone for separation, the gypsum mainly enters the overflow, and the tailings of the titanium extraction enter the underflow. Get the ideal separation.
在一些实施方式中，尾渣浆料中固相的质量分数为10％～50％。进一步的，固相中的石膏按质量含量的百分比为3～20％。能够理解的是，提钛尾渣加入添加剂浸出反应后，过滤，滤饼进行煅烧，可大幅降低氯离子含量。需要说明的是，该浸出反应过程中，尾渣与添加剂反应形成了大量石膏，受反应时搅拌的影响，其晶体粒度均很小，基本为10um以下的长条状，甚至为nm级别，而提钛尾渣的粒度90％在30um以上，且密度远大于石膏，具有良好的重选分离条件。In some embodiments, the mass fraction of the solid phase in the tailings slurry is 10% to 50%. Further, the percentage by mass of the gypsum in the solid phase is 3-20%. It can be understood that after the titanium extraction tailings are added to the additive leaching reaction, filtered, and the filter cake is calcined, the chloride ion content can be greatly reduced. It should be noted that, during the leaching reaction, the tailings reacted with the additives to form a large amount of gypsum. Under the influence of the stirring during the reaction, the crystal size of the gypsum was very small, basically in the shape of strips below 10um, or even in the nm level. The particle size of titanium extraction tailings is 90% above 30um, and the density is much larger than that of gypsum, which has good gravity separation conditions.
此外，在(4)浆料过滤步骤中，将溢流石膏浆料过滤得到石膏，包括：通过常压箱式板框压滤机对溢流石膏浆料进行过滤，得到石膏。In addition, in (4) the slurry filtering step, filtering the overflow gypsum slurry to obtain gypsum includes: filtering the overflow gypsum slurry through an atmospheric pressure box-type plate and frame filter press to obtain gypsum.
本发明实施例的另一方面，提供了一种提钛尾渣深脱氯的方法，包括以下步骤：(1)浆料浸出：向提钛尾渣中加入水和添加剂，浸出反应后得到尾渣浆料；其中，浸出反应的过程生成石膏；以及添加剂用于对提钛尾渣进行脱氯；(2)浆料搅拌：将尾渣浆料搅拌均匀；(3)浆料分离：通过渣浆泵将尾渣浆料送至水力旋流器进行重选分离，以得到底流尾渣浆料和溢流石膏浆料；(4)浆料过滤：将底流尾渣浆料过滤得到尾渣滤饼；(5)滤饼煅烧：将尾渣滤饼进行煅烧。本发明工艺简单、流程短、成本低、分离效果好且效率高，尾渣浆料搅拌均匀后直接泵送入水力旋流器，即实现石膏的分离，石膏脱除率可达95％以上，使得尾渣滤饼的含水率降低10个百分点以上，从而减少后续煅烧工序的能耗，减少烟气中二氧化硫的含量，并降低煅烧产品的硫含量。Another aspect of the embodiments of the present invention provides a method for deep dechlorination of tailings of titanium extraction, comprising the following steps: (1) slurry leaching: adding water and additives to the tailings of titanium extraction, and obtaining tailings after leaching reaction Slag slurry; wherein, gypsum is generated in the process of leaching reaction; and additives are used for dechlorination of titanium extraction tailings; (2) slurry stirring: the tailings slurry is stirred evenly; (3) slurry separation: through the slag The slurry pump sends the tailings slurry to the hydrocyclone for re-selection and separation to obtain underflow tailings slurry and overflow gypsum slurry; (4) Slurry filtration: filter the underflow tailings slurry to obtain tailings filter (5) filter cake calcination: the tailings filter cake is calcined. The method has the advantages of simple process, short process, low cost, good separation effect and high efficiency. After the tailings slurry is evenly stirred, it is directly pumped into the hydrocyclone, that is, the separation of gypsum is realized, and the removal rate of gypsum can reach more than 95%. The moisture content of the tailings filter cake is reduced by more than 10 percentage points, thereby reducing the energy consumption of the subsequent calcination process, reducing the content of sulfur dioxide in the flue gas, and reducing the sulfur content of the calcined product.
在一些实施方式中，在(4)浆料过滤步骤中，将底流尾渣浆料过滤得到尾渣滤饼，包括：通过常压箱式板框压滤机对底流尾渣浆料进行过滤，得到尾渣滤饼。In some embodiments, in (4) the slurry filtration step, filtering the underflow tailings slurry to obtain a tailings filter cake, comprising: filtering the underflow tailings slurry through an atmospheric pressure box-type plate and frame filter press, A tailings filter cake is obtained.
下面通过具体的实施例和对比例对本发明进行具体的说明。The present invention will be specifically described below through specific examples and comparative examples.
实施例和对比例使用的是化工企业的提钛尾渣，向该提钛尾渣中加入水和脱氯剂，浸出反应后得到尾渣浆料；其中，尾渣浆料的矿浆浓度为30％，过滤干燥后所得固形物的主要化学成分如表1所示：The examples and comparative examples used the titanium extraction tailings of chemical enterprises, water and dechlorination agent were added to the titanium extraction tailings, and the tailings slurry was obtained after the leaching reaction; wherein, the slurry concentration of the tailings slurry was 30%. %, the main chemical components of the solid obtained after filtration and drying are shown in Table 1:
表1提钛尾渣反应浆液滤饼的主要成分(重量百分比，wt％)Table 1 Main components (weight percent, wt%) of titanium tailings reaction slurry filter cake
实施例1Example 1
该实施例是运用本发明提供的一种由提钛尾渣生成并分离石膏的方法，来实现石膏的分离，具体包括以下步骤：This embodiment utilizes a kind of method provided by the present invention to generate and separate gypsum from titanium tailings to realize the separation of gypsum, and specifically comprises the following steps:
(1)浆料浸出：向提钛尾渣中加入水和添加剂，浸出反应后得到尾渣浆料；(1) Slurry leaching: add water and additives to the titanium tailings, and obtain tailings slurry after leaching reaction;
(2)浆料搅拌：将尾渣浆料搅拌均匀；(2) Slurry stirring: stir the tailings slurry evenly;
(3)浆料分离：通过渣浆泵将尾渣浆料送至水力旋流器进行重选分离，以得到底流尾渣浆料和溢流石膏浆料；水力旋流器的直径为180mm；水力旋流器上沉沙嘴的直径为25mm；以及给料压力为0.15MPa；(3) Slurry separation: the tailings slurry is sent to the hydrocyclone by the slurry pump for gravity separation to obtain the underflow tailings slurry and the overflow gypsum slurry; the diameter of the hydrocyclone is 180mm; The diameter of the sand settling nozzle on the hydrocyclone is 25mm; and the feeding pressure is 0.15MPa;
(4)浆料过滤：通过常压箱式板框压滤机对溢流石膏浆料压滤，得到石膏；以及通过常压箱式板框压滤机对底流尾渣浆料压滤，得到尾渣滤饼；其中，最大进料压力为9kg/cm2；(4) Slurry filtration: filter the overflow gypsum slurry by an atmospheric pressure box-type plate and frame filter press to obtain gypsum; and filter the underflow tailings slurry through an atmospheric pressure box-type plate and frame filter press to obtain tailings filter cake; wherein, the maximum feed pressure is 9kg/cm 2 ;
采用实施例1的工艺可以得到石膏和尾渣滤饼。其中，尾渣滤饼的含水率经检测为15.9％，尾渣滤饼中的石膏含量通过XRD物相定量分析为1.8％；而过滤所得到石膏经分析可知纯度为82％。Using the process of Example 1, gypsum and tailings filter cake can be obtained. Among them, the moisture content of the tailings filter cake is 15.9%, and the gypsum content in the tailings filter cake is 1.8% by XRD quantitative analysis; and the gypsum obtained by filtration is 82% pure.
实施例2Example 2
该实施例是运用本发明提供的一种由提钛尾渣生成并分离石膏的方法，来实现石膏的分离，具体包括以下步骤：This embodiment utilizes a kind of method provided by the present invention to generate and separate gypsum from titanium tailings to realize the separation of gypsum, and specifically comprises the following steps:
(1)浆料浸出：向提钛尾渣中加入水和添加剂，浸出反应后得到尾渣浆料；(1) Slurry leaching: add water and additives to the titanium tailings, and obtain tailings slurry after leaching reaction;
(2)浆料搅拌：将尾渣浆料搅拌均匀；(2) Slurry stirring: stir the tailings slurry evenly;
(3)浆料分离：通过渣浆泵将尾渣浆料送至水力旋流器进行重选分离，以得到一级底流尾渣浆料和一级溢流石膏浆料；水力旋流器的直径为180mm；水力旋流器上沉沙嘴的直径为25mm；以及给料压力为0.15MPa；(3) Slurry separation: The tailings slurry is sent to the hydrocyclone by the slurry pump for gravity separation to obtain the first-level underflow tailings slurry and the first-level overflow gypsum slurry; The diameter is 180mm; the diameter of the sand settling nozzle on the hydrocyclone is 25mm; and the feeding pressure is 0.15MPa;
(4)一级底流尾渣浆料搅拌：将一级底流尾渣浆料搅拌均匀；(4) Stirring of the first-stage underflow tailings slurry: stir the first-stage underflow tailings slurry evenly;
(5)一级底流尾渣浆料分离：通过渣浆泵将一级底流尾渣浆料送至水力旋流器进行重选分离，以得到二级底流尾渣浆料和二级溢流石膏浆料；水力旋流器的直径为150mm；水力旋流器上沉沙嘴的直径为16mm；以及给料压力为0.16MPa；(5) Separation of first-stage underflow tailings slurry: The first-stage underflow tailings slurry is sent to a hydrocyclone for gravity separation through a slurry pump, so as to obtain a second-stage underflow tailings slurry and a second-stage overflow gypsum. Slurry; the diameter of the hydrocyclone is 150mm; the diameter of the sand settling nozzle on the hydrocyclone is 16mm; and the feeding pressure is 0.16MPa;
(6)浆料混合：将一级溢流石膏浆料与二级溢流石膏浆料混合得到溢流石膏浆料；(6) Slurry mixing: mixing the primary overflow gypsum slurry with the secondary overflow gypsum slurry to obtain the overflow gypsum slurry;
(7)浆料过滤：通过常压箱式板框压滤机对溢流石膏浆料压滤，得到石膏；以及通过常压箱式板框压滤机对二级底流尾渣浆料压滤，得到尾渣滤饼；其中，最大进料压力为9kg/cm2；(7) Slurry filtration: filter the overflow gypsum slurry through an atmospheric pressure box-type plate and frame filter press to obtain gypsum; and filter the secondary underflow tailings slurry through an atmospheric-pressure box-type plate and frame filter press , obtain the tailings filter cake; Wherein, the maximum feed pressure is 9kg/cm 2 ;
采用实施例2的工艺可以得到石膏和尾渣滤饼。其中，尾渣滤饼的含水率经检测为15.1％，尾渣滤饼中的石膏含量通过XRD物相定量分析为0.6％；而过滤所得到石膏经分析可知纯度为78％。Using the process of Example 2, gypsum and tailings filter cake can be obtained. Among them, the moisture content of the tailings filter cake is 15.1%, and the gypsum content in the tailings filter cake is 0.6% by XRD quantitative analysis; and the gypsum obtained by filtration is 78% pure.
实施例3Example 3
该实施例是运用本发明提供的一种由提钛尾渣生成并分离石膏的方法，来实现石膏的分离，具体包括以下步骤：This embodiment utilizes a kind of method provided by the present invention to generate and separate gypsum from titanium tailings to realize the separation of gypsum, and specifically comprises the following steps:
(1)浆料浸出：向提钛尾渣中加入水和添加剂，浸出反应后得到尾渣浆料；(1) Slurry leaching: add water and additives to the titanium tailings, and obtain tailings slurry after leaching reaction;
(2)浆料搅拌：将尾渣浆料搅拌均匀；(2) Slurry stirring: stir the tailings slurry evenly;
(3)浆料分离：通过渣浆泵将尾渣浆料送至水力旋流器进行重选分离，以得到底流尾渣浆料和溢流石膏浆料；水力旋流器的直径为260mm；水力旋流器上沉沙嘴的直径为35mm；以及给料压力为0.25MPa；(3) Slurry separation: The tailings slurry is sent to a hydrocyclone by a slurry pump for gravity separation to obtain underflow tailings slurry and overflow gypsum slurry; the diameter of the hydrocyclone is 260mm; The diameter of the sand settling nozzle on the hydrocyclone is 35mm; and the feeding pressure is 0.25MPa;
(4)浆料过滤：通过常压箱式板框压滤机对溢流石膏浆料压滤，得到石膏；以及通过常压箱式板框压滤机对底流尾渣浆料压滤，得到尾渣滤饼；其中，最大进料压力为9kg/cm2；(4) Slurry filtration: filter the overflow gypsum slurry by an atmospheric pressure box-type plate and frame filter press to obtain gypsum; and filter the underflow tailings slurry through an atmospheric pressure box-type plate and frame filter press to obtain tailings filter cake; wherein, the maximum feed pressure is 9kg/cm 2 ;
采用实施例3的工艺可以得到石膏和尾渣滤饼。其中，尾渣滤饼的含水率经检测为16.5％，尾渣滤饼中的石膏含量通过XRD物相定量分析为2.5％；而过滤所得到石膏经分析可知纯度为88％。Using the process of Example 3, gypsum and tailings filter cake can be obtained. Among them, the moisture content of the tailings filter cake was detected as 16.5%, the gypsum content in the tailings filter cake was 2.5% by XRD quantitative analysis, and the gypsum obtained by filtration was analyzed to be 88% pure.
实施例4Example 4
该实施例是运用本发明提供的一种由提钛尾渣生成并分离石膏的方法，来实现石膏的分离，具体包括以下步骤：This embodiment utilizes a kind of method provided by the present invention to generate and separate gypsum from titanium tailings to realize the separation of gypsum, and specifically comprises the following steps:
(1)浆料浸出：向提钛尾渣中加入水和添加剂，浸出反应后得到尾渣浆料；(1) Slurry leaching: add water and additives to the titanium tailings, and obtain tailings slurry after leaching reaction;
(2)浆料搅拌：将尾渣浆料搅拌均匀；(2) Slurry stirring: stir the tailings slurry evenly;
(3)浆料分离：通过渣浆泵将尾渣浆料送至水力旋流器进行重选分离，以得到底流尾渣浆料和溢流石膏浆料；水力旋流器的直径为60mm；水力旋流器上沉沙嘴的直径为10mm；以及给料压力为0.05MPa；(3) Slurry separation: The tailings slurry is sent to a hydrocyclone by a slurry pump for gravity separation to obtain underflow tailings slurry and overflow gypsum slurry; the diameter of the hydrocyclone is 60mm; The diameter of the sand settling nozzle on the hydrocyclone is 10mm; and the feeding pressure is 0.05MPa;
(4)浆料过滤：通过常压箱式板框压滤机对溢流石膏浆料压滤，得到石膏；以及通过常压箱式板框压滤机对底流尾渣浆料压滤，得到尾渣滤饼；其中，最大进料压力为9kg/cm2；(4) Slurry filtration: filter the overflow gypsum slurry by an atmospheric pressure box-type plate and frame filter press to obtain gypsum; and filter the underflow tailings slurry through an atmospheric pressure box-type plate and frame filter press to obtain tailings filter cake; wherein, the maximum feed pressure is 9kg/cm 2 ;
采用实施例4的工艺可以得到石膏和尾渣滤饼。其中，尾渣滤饼的含水率经检测为18.9％，尾渣滤饼中的石膏含量通过XRD物相定量分析为3.2％；而过滤所得到石膏经分析可知纯度为82％。Using the process of Example 4, gypsum and tailings filter cake can be obtained. Among them, the moisture content of the tailings filter cake is 18.9%, the gypsum content in the tailings filter cake is 3.2% by XRD quantitative analysis, and the gypsum obtained by filtration is 82% pure.
实施例5Example 5
该实施例是运用本发明提供的一种由提钛尾渣生成并分离石膏的方法，来实现石膏的分离，具体包括以下步骤：This embodiment utilizes a kind of method provided by the present invention to generate and separate gypsum from titanium tailings to realize the separation of gypsum, and specifically comprises the following steps:
(1)浆料浸出：向提钛尾渣中加入水和添加剂，浸出反应后得到尾渣浆料；(1) Slurry leaching: add water and additives to the titanium tailings, and obtain tailings slurry after leaching reaction;
(2)浆料搅拌：将尾渣浆料搅拌均匀；(2) Slurry stirring: stir the tailings slurry evenly;
(3)浆料分离：通过渣浆泵将尾渣浆料送至水力旋流器进行重选分离，以得到底流尾渣浆料和溢流石膏浆料；水力旋流器的直径为300mm；水力旋流器上沉沙嘴的直径为40mm；以及给料压力为0.3MPa；(3) Slurry separation: The tailings slurry is sent to a hydrocyclone by a slurry pump for gravity separation to obtain underflow tailings slurry and overflow gypsum slurry; the diameter of the hydrocyclone is 300mm; The diameter of the sand settling nozzle on the hydrocyclone is 40mm; and the feeding pressure is 0.3MPa;
(4)浆料过滤：通过常压箱式板框压滤机对溢流石膏浆料压滤，得到石膏；以及通过常压箱式板框压滤机对底流尾渣浆料压滤，得到尾渣滤饼；其中，最大进料压力为9kg/cm2；(4) Slurry filtration: filter the overflow gypsum slurry by an atmospheric pressure box-type plate and frame filter press to obtain gypsum; and filter the underflow tailings slurry through an atmospheric pressure box-type plate and frame filter press to obtain tailings filter cake; wherein, the maximum feed pressure is 9kg/cm 2 ;
采用实施例5的工艺可以得到石膏和尾渣滤饼。其中，尾渣滤饼的含水率经检测为18.3％，尾渣滤饼中的石膏含量通过XRD物相定量分析为2.9％；而过滤所得到石膏经分析可知纯度为78％。Using the process of Example 5, gypsum and tailings filter cake can be obtained. Among them, the moisture content of the tailings filter cake is 18.3%, the gypsum content in the tailings filter cake is 2.9% by XRD quantitative analysis, and the gypsum obtained by filtration is 78% pure.
对比例1Comparative Example 1
该对比例具体包括以下步骤：The comparative example specifically includes the following steps:
(1)浆料浸出：向提钛尾渣中加入水和添加剂，浸出反应后得到尾渣浆料；(1) Slurry leaching: add water and additives to the titanium tailings, and obtain tailings slurry after leaching reaction;
(2)浆料搅拌：将尾渣浆料搅拌均匀；(2) Slurry stirring: stir the tailings slurry evenly;
(3)浆料分离：通过渣浆泵将尾渣浆料送入常压箱式板框压滤机，得到尾渣滤饼；其中，最大进料压力为9kg/cm2；(3) Slurry separation: the tailings slurry is sent to the atmospheric pressure box-type plate and frame filter press by the slurry pump to obtain the tailings filter cake; wherein, the maximum feeding pressure is 9kg/cm 2 ;
采用该工艺可以得到尾渣滤饼。其中，尾渣滤饼的含水率经检测为27.8％，尾渣滤饼中的石膏含量通过XRD物相定量分析为13.2％。Using this process, the tailings filter cake can be obtained. Among them, the moisture content of the tailings filter cake was detected to be 27.8%, and the gypsum content in the tailings filter cake was 13.2% by XRD quantitative analysis.
可以得到的是，本发明提供的由提钛尾渣生成并分离石膏的方法，具有工艺简单、流程短、成本低、分离效果好及效率高的特点，石膏脱除率可达95％以上，且尾渣滤饼的含水率降低10个百分点以上，从而减少后续煅烧工序的能耗，减少烟气中二氧化硫的含量，并降低煅烧产品的硫含量。对比例的方案达不到本发明实施例方案的技术效果。It can be obtained that the method for generating and separating gypsum from the titanium extraction tailings provided by the present invention has the characteristics of simple process, short process, low cost, good separation effect and high efficiency, and the gypsum removal rate can reach more than 95%, And the moisture content of the tailings filter cake is reduced by more than 10 percentage points, thereby reducing the energy consumption of the subsequent calcination process, reducing the content of sulfur dioxide in the flue gas, and reducing the sulfur content of the calcined product. The solution of the comparative example cannot achieve the technical effect of the solution of the embodiment of the present invention.
以上实施例仅表达了本发明的实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。The above examples only represent the embodiments of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.
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| US5215672A (en) * | 1992-09-01 | 1993-06-01 | The Babcock & Wilcox Company | Purification of FGD gypsum product |
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| CN110002779A (en) * | 2019-05-17 | 2019-07-12 | 攀钢集团攀枝花钢铁研究院有限公司 | With the method for titanium extraction tailings production slag micropowder |
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| DE20111900U1 (en) * | 2001-07-09 | 2001-10-18 | VEAG Vereinigte Energiewerke AG, 10115 Berlin | Arrangement for the continuous blowdown of a washer |
| CN110002779A (en) * | 2019-05-17 | 2019-07-12 | 攀钢集团攀枝花钢铁研究院有限公司 | With the method for titanium extraction tailings production slag micropowder |
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| CN116272850A (en) * | 2023-05-09 | 2023-06-23 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation of porous adsorption material by titanium extraction tailings coupled mineralization and CO sequestration 2 Method and application of (2) |
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