CN1785837A - Method of preparing poly-silicon iron aluminium sulphate using metallugical slag - Google Patents

Method of preparing poly-silicon iron aluminium sulphate using metallugical slag Download PDF

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Publication number
CN1785837A
CN1785837A CNA2005100949671A CN200510094967A CN1785837A CN 1785837 A CN1785837 A CN 1785837A CN A2005100949671 A CNA2005100949671 A CN A2005100949671A CN 200510094967 A CN200510094967 A CN 200510094967A CN 1785837 A CN1785837 A CN 1785837A
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slag
acidolysis
value
aluminium sulphate
silicon iron
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CN100344551C (en
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李辽沙
董元篪
王平
伍娟
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Anhui Polytechnic University
Anhui University of Technology AHUT
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Anhui University of Technology AHUT
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  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Manufacture Of Iron (AREA)

Abstract

The present invention provides a method for preparing poly aluminium ferric silicate sulphate by using metallurgical slag. Said method includes the following main steps: acidolysizing slag, filtering acidolysis reaction product to remove precipitate, extracting supernatant fluid, using hydrogen peroxide to make oxidation, making Fe(II) in the system be completely converted into Fe(III), placing the oxidated system into water bath to make hydrolysis and polymerization so as to obtain the invented product.

Description

The method for preparing poly-silicon iron aluminium sulphate with metallurgical slag
Affiliated technical field:
The invention belongs to the flocculation agent preparing technical field, be specifically related to prepare the method for poly-silicon iron aluminium sulphate with metallurgical slag.
Background technology:
The raw material of existing preparation poly-silicon iron aluminium sulphate has water glass, ferric sulfate and Tai-Ace S 150, or iron content, the more mineral substance of aluminum ion, and the preparation method is with behind the poly-silicic acid of water glass acidifying preparation, introduces iron again, aluminum ion is polymerized.It is main raw material that this preparation method needs expensive industrial chemicals or limited mineral wealth, and cost is higher.
Summary of the invention:
At the problem that exists among the above-mentioned existing preparation method, the invention provides a kind of is the method for feedstock production poly-silicon iron aluminium sulphate with the blast furnace metallurgical slag.
Now that this preparation method is related raw material, preparation principle and concrete preparation method are as follows.
1, the main raw material and the physicochemical property of preparation poly-silicon iron aluminium sulphate
Main preparation raw material involved in the present invention is blast furnace metallurgical slag and converter mud.The blast furnace metallurgical slag is the chilling grain slag that the ironmaking slag at high temperature produces through high pressure water impact, main thing is not decided the oozy glass body for having mutually, has good chemically reactive, its main chemical constitution is the oxide compound of silicon, calcium, aluminium, its typical chemical ingredients sees Table 1, and the silicon that contains in this slag, al composition are the sources that this method prepares silicon, aluminium in the ferric sulfate of polymerized silica aluminium flocculating agent.The raw material converter mud derives from steelmaking process, and required iron component in the preparation poly-silicon iron aluminium sulphate is provided, and its main thing is iron, rhombohedral iron ore, potassium sodium plagioclase and hornblende mutually.Its typical chemical ingredients sees Table 2:
The main component of table 1. metallurgical slag
Composition SiO 2 MgO Al 2O 3 CaO FeO Other
Content (%) 31.2 10.02 14.08 37.31 0.44 6.95
The main component of table 2. converter mud
Composition Fe 2O 3 FeO SiO 2 CaO Al 2O 3 MgO Other
Content (%) 21.38 49.62 2.67 17.62 0.72 4.76 3.23
2, preparation principle
The principle of preparation is: by predetermined composition requirement, blast furnace metallurgical slag, converter mud are mixed with proper ratio, after acidolysis, filtering separation, obtain mixing solutions based on ferrous salt, trivalent iron salt, aluminium salt and silicic acid, with this mixing solutions through adjusting the pH value, with ferrous in the strong oxidizer hydrogen peroxide oxidation solution is high ferro, through hydrolysis, polymerization, adjust pH value of filtrate again, finally make poly-silicon iron aluminium sulphate (PFASS).
3, preparation method's concrete steps are as follows:
(1) according to Al: the mass ratio of Fe: Si quantitatively took by weighing the mixing of blast furnace metallurgical slag and converter mud and puts into acid-resistant reacting kettle at 1: 6: 1.
(2) prepare the sulfuric acid of determining concentration:
Suitable sulfuric acid concentration: w=5%～20%.
(3) according to the chemical constitution of blast furnace metallurgical slag and converter mud,, control SO by acid and the required stoichiometry [seeing following reaction (1) and (2)] of slag (blast furnace metallurgical slag and converter mud mixture) reaction 4 2-/ Fe 2+Mol ratio in 1.85 scope, is measured acid solution greater than 1.25.
(4) acid solution is at room temperature slowly poured in the reactor slag is carried out acidolysis, and constantly stir, the question response system is cooled to room temperature and there is no bubble and produce, and pH value value of tending towards stability, acidolysis reaction finishes, and the acidolysis time is controlled at 50min, and temperature is controlled at room temperature during acidolysis.
(5) reaction product is filtered removal throw out (being mainly gypsum and acid non-soluble substance), extract supernatant liquor (being mainly ferrous salt, trivalent iron salt, aluminium salt and silicate hydrate is main mixing solutions), the pH value that sodium hydroxide with 10% is adjusted solution is about 2.2, use 30% hydrogen peroxide oxidation again, make the Fe (II) in the system all be converted into Fe (III).Oxidizing reaction is at room temperature carried out, and its oxidation terminal point of the process of Oxidation of Fe (II) is determined with the Tripotassium iron hexacyanide.
(6) system after the oxidation is placed heating in water bath 2～3h, maintain the temperature at about 80 ℃, system hydrolysis voluntarily, polymerization in the process, regulating the pH value is 2.0 to 2.5, the liquid product of reddish-brown occurs, Prolong this process time, can make the yellow solid product, be poly-silicon iron aluminium sulphate (PFASS).
The principal reaction of preparation process can be written as:
(1)
(2)
(3)
(4)
(5)
The present invention be with the blast furnace metallurgical slag as main material production high value added product poly-silicon iron aluminium sulphate, prepared poly-silicon iron aluminium sulphate is applicable to handles high turbidity suspension liquid, sanitary sewage and trade effluent.Because the used main raw material of preparation is the blast furnace waste residue, has reduced the wasting of resources, also alleviated simultaneously the pollution that it directly drains in the environment to be caused.This preparation method is with low cost, and process is simple, has the remarkable economical social benefit.
Embodiment:
Embodiment 1:
Elder generation's compound concentration is 10% sulphuric acid soln, and is standby.Converter mud and blast furnace slag are mixed with 2: 1 (mass ratio), add the sulphuric acid soln that has prepared then.We get converter mud 40g blast furnace slag 20g and add 10% sulphuric acid soln 552ml, and the order of adding is that the sulfuric acid that will prepare adds toward mixing the slag the inside, and the acidolysis time is controlled at 50min.After the slag dissolving fully, it is carried out suction filtration, then filtrate taking-up is placed beaker, standby.Preparation 10%NaOH solution is regulated filtrate pH value to 2.2.After the pH value is regulated, just in the solution that has prepared, dropwise add 30%H 2O 2, the oxidation terminal point utilizes Tripotassium iron hexacyanide detection method to control and (takes out small volume of solution and drip on Tripotassium iron hexacyanide solid, all be oxidized to ferric ion, then nondiscoloration as ferrous ion; Not by complete oxidation, then can generate blue complex as ferrous ion).Will fully stir in initial reaction stage, churning time is controlled at 30min.The water bath with thermostatic control that the solution that the last step had been prepared is put into about 80 ℃ makes its polymerization, when the reddish-brown thick liquid appears in system,, continue in water bath with thermostatic control, to place 2 hours with 10%NaOH solution regulation system pH value to 2.0, its abundant polymerization forms the cotton-shaped coloured particles of reddish yellow.It can be continued then to place transpiring moisture in water bath with thermostatic control, until becoming the yellow solid state.Grind and promptly obtain the finished product---[Al xFe 1-x(OH) 3-2y(SO 4) yZSiO 2] n.
Embodiment 2:
Elder generation's compound concentration is 15% sulphuric acid soln, and is standby.Converter mud and blast furnace slag are mixed with 2: 1 (mass ratio), add the sulphuric acid soln that has prepared then.Get converter mud 40g blast furnace slag 20g and mix, the back adds 15% sulphuric acid soln 368ml (containing 98% vitriol oil 30ml in this sulphuric acid soln) acidolysis, and the order of adding is that the sulfuric acid that will prepare adds toward mixing the slag the inside.The acidolysis time is controlled at 50min.After treating slag acidolysis fully, it is carried out suction filtration, then filtrate taking-up is placed beaker, standby.Preparation 10%NaOH solution is regulated filtrate pH value 2.2.After the pH value is regulated, just in the solution that has prepared, dropwise add 30%H 2O 2, the oxidation terminal point utilizes Tripotassium iron hexacyanide detection method to control.Will fully stir in initial reaction stage, churning time is controlled at 30min.The water bath with thermostatic control that the solution that the last step had been prepared is put into about 80 ℃ makes its polymerization, when the reddish-brown thick liquid appears in system,, continue in water bath with thermostatic control, to place 2 hours with 10%NaOH solution regulation system pH value to 2.5, its abundant polymerization forms the cotton-shaped particle of reddish yellow.It can be continued then to place transpiring moisture in water bath with thermostatic control, until becoming the yellow solid state.Grind and promptly obtain the finished product---[Al xFe 1-x(OH) 3-2y(SO 4) yZSiO 2] n.

Claims (1)

1, the method for preparing poly-silicon iron aluminium sulphate with metallurgical slag is characterized in that this preparation method composition that has the following steps:
(1) according to Al: the mass ratio of Fe: Si quantitatively took by weighing the mixing of blast furnace metallurgical slag and converter mud and puts into acid-resistant reacting kettle at 1: 6: 1;
(2) prepare the sulfuric acid of determining concentration: suitable sulfuric acid concentration: w=5%～20%;
(3) according to the chemical constitution of blast furnace metallurgical slag and converter mud,, control SO by acid and the required stoichiometry of slag reaction 4 2-/ Fe 2+Mol ratio in 1.85 scope, is measured acid solution greater than 1.25;
(4) acid solution is at room temperature slowly poured in the reactor slag is carried out acidolysis, and constantly stir, the question response system is cooled to room temperature and there is no bubble and produce, and pH value value of tending towards stability, acidolysis reaction finishes, and the acidolysis time is controlled at 50min, and temperature is controlled at room temperature during acidolysis;
(5) reaction product is filtered the removal throw out, extract supernatant liquor, the pH value that the sodium hydroxide with 10% is adjusted solution is about 2.2, uses 30% hydrogen peroxide oxidation again, makes the Fe (II) in the system all be converted into Fe (III);
(6) system after the oxidation is placed heating in water bath 2～3h, maintain the temperature at about 80 ℃ system hydrolysis voluntarily, polymerization in the process, regulating the pH value is 2.0 to 2.5, the liquid product of reddish-brown occurs, prolongs this process time, make the yellow solid product, be poly-silicon iron aluminium sulphate.
CNB2005100949671A 2005-10-24 2005-10-24 Method of preparing poly-silicon iron aluminium sulphate using metallugical slag Expired - Fee Related CN100344551C (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101239721B (en) * 2007-02-08 2010-11-03 朱成林 Method for preparing polysilicon ferric sulfate water purifying agent from steel slag and water slag
CN103030200A (en) * 2013-01-09 2013-04-10 杨祺 Method for producing poly-silicon rare earth chloride sulfate aluminum iron by using rare earth-containing sludge and electroplated and pickled acid-containing sewage
CN106914248A (en) * 2017-01-22 2017-07-04 安徽工业大学 A kind of doping type CaFe2O4@α‑Fe2O3Heterojunction composite photocatalyst and its preparation method and application
CN107032466A (en) * 2017-05-25 2017-08-11 北京中矿东方矿业有限公司 A kind of ferric sulfate of polymerized silica aluminium water purifying agent production method
CN115043471A (en) * 2022-06-16 2022-09-13 白银有色集团股份有限公司 Method for preparing polysilicate aluminum ferric sulfate flocculant by using copper smelting furnace slag

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1076234C (en) * 1995-12-09 2001-12-19 樊枝花钢铁(集团)公司钢铁研究院 Method of preparing iron powder and its products by using steelmaking converter smoke or slude
AT407263B (en) * 1999-04-22 2001-02-26 Holderbank Financ Glarus METHOD FOR REPRODUCING STEEL SLAG

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101239721B (en) * 2007-02-08 2010-11-03 朱成林 Method for preparing polysilicon ferric sulfate water purifying agent from steel slag and water slag
CN103030200A (en) * 2013-01-09 2013-04-10 杨祺 Method for producing poly-silicon rare earth chloride sulfate aluminum iron by using rare earth-containing sludge and electroplated and pickled acid-containing sewage
CN106914248A (en) * 2017-01-22 2017-07-04 安徽工业大学 A kind of doping type CaFe2O4@α‑Fe2O3Heterojunction composite photocatalyst and its preparation method and application
CN106914248B (en) * 2017-01-22 2019-05-07 安徽工业大学 A kind of doping type CaFe2O4@α-Fe2O3Heterojunction composite photocatalyst and its preparation method and application
CN107032466A (en) * 2017-05-25 2017-08-11 北京中矿东方矿业有限公司 A kind of ferric sulfate of polymerized silica aluminium water purifying agent production method
CN115043471A (en) * 2022-06-16 2022-09-13 白银有色集团股份有限公司 Method for preparing polysilicate aluminum ferric sulfate flocculant by using copper smelting furnace slag

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