HU230531B1 - Process for recycling of titanium oxide from read mud - Google Patents

Abstract

Red sludge recovery is a method for extracting titanium content. Before pressing, treat the sludge with acid a to neutralize residual caustic soda. Sulfuric acid is used to neutralize pH 6.5 to pH 9.5, a adjusting the alkalinity, preferably from about one to two. pH 8.5 or the alkali content of red mud with hydrochloric acid (typically waste hydrochloric acid). Dissolve the iron (oxide) and other metal (oxide) content of red mud in an aqueous solution of hydrochloric acid to recover rare metal compounds. iron chloride solution. The silicate-based slurry remaining after acidic dissolution is typically SiO2 and TiO2 a mixture is obtained. From the metal salts introduced into the solution, the silicate-based slurry is separated. According to the specific gravity of the remaining sludge content of red mud separated from the copper chloride-based solution, titanium dioxide is \ t Separated from silica. Titanium dioxide is produced by a method known per se known as titanium dioxide separation after the remaining slurry, shaped bodies are prepared in a manner known per se.

Description

Process for the recovery of titanium dioxide from red sludge Ellama proceeds from the recovery of red sludge.

X is a slurry of empty slurry ^

Construction utilization: cement production, construction molds for geo-polymers.

Chemical applications: production of & l & lizers, sorbents, ceramics, coatings, plastic fillers, pigments.

- Environment: treatment of wastewater and acid mine water, treatment of contaminated soil * treatment of acid waste and tail gas. SO> CCo working.

Agriculture: Improvement of soil compaction, soil support, phosphorus retention, management of contaminated soils.

Metallurgy: metal recovery. Steel production. Extraction of non-major components.

From the i96O to the year 20011 the construction industry (construction of railway, railway, water protection structures) has a remarkable share in the utilization of red sludge. Chewing sludge is well used for the treatment of acidic industrial and mining waters, the result of which is water-soluble salt. Is the adsorption question 'Jha »mahs e.'this old-fashioned noodle \ soccerL · alljvt sv? you can follow seaferé.mm documents Knowledge material is close to our patent application.

Dl: Like GB 1598331, it is treated with · red soda · acid, pH adjusted, <formed; rooms are separated and washed, and pressure bodies are formed. (Esp. P. I, 39-56, p. 2, 55-5.75-9O. P. 3, ex. 1, 1,2, h, 9).

D2: V'nresl vom '?' Of WÖ2018879369 for processing red sludge into useful material ame.y.'rá so \ n the ivapof «avval, lye ^ \ · 1ικ. ? Kdeiké.ért - / son.; ', V Elira MX2 eh'abash, wash, used in the cement industry. (Ess. Extract, Flowchart, 3, pp., 1-9-30, 4, 33-16, 6th Cause, 7-22).

D3: Patent Specification 1306248,362 discloses a process for recovering metals from red mud. According to the solution, the red sludge is treated with acid, washed, and the so-called "phase" is separated from the system, the aluminum phase precipitates from the liquid phase by adjusting the pH (Esd, aura 1, column 2, 30-5, column 3, 18-27. 5, column 64h, column 1-11}.

194; Hungarian Patent 3113 1.84318 for the production of aramin me-ox.id machine center rama for use in the processing of mainly poor quality bauxite and clay minerals for cold processing xonarárt / tk \ kud? S erx'ns ypo, os3m? s \ ti <, χ lord, hands The solution containing it 'is dissolved from the dissolved eagle by iron rescuing and iron fho-chlorldol eluting & reducing the iron residue by digestion.

The disadvantages of the above solutions are that they do not deal with the issue of the disposal and utilization of red sludge in a complex way and do not separate the SRE and TRE mixture. The documents revealed during the novelty examination do not cover SitE and Tiú _? This was a breath of air, the state of the art, and a series of red mud processing methods? violation; offended, so we can declare that we are a profession ... Pseudomotorists and elaborate prophylaxis for pulse, travel, seduction, pendulum pendulum; layer 10 O% S; _O & --f _t, -t tamdort TliE 100% / y and f, and ECC-thio-1> can be separated $ tartaimuzó taxi much. This is the mixed phase! vimavert s sly - ,; n. \ - !? top.

Have we discovered that the use of red sludge has resulted in sand and phylloxide oxidation using methods known to date? economically and quickly cl »rdtvk chose each other for the requested oxide. based on brewer's wheat and kangaroo gravel, and thus will the verb be valuable, especially titanium verbs? economical extraction.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a solution for utilizing red sludge as described in the preamble, which is capable of solving the approx. The full utilization of 50 million tons of red mud is ancient.

recovering your precious rare metal amtk is enriched in the remaining insoluble slurry. This exercise t <<jk ubrane,> lm u '> i anpon ^s c ^! uitOt Ji>. '> 1? ' eo hell mte-. <. <,?

The invention relates to a process for utilizing red sludge. The way it came is the extraction of rare metals, especially titanium. Before pressing, the residue is treated with tannic acid. wrönáíron. neutralize. A. Adjust the pH to pH 8.5 from pH 6.5 to pH 9.5, or the alkaline solution of the sludge slurry with hydrochloric acid (typical · ;. ';: drizzle \ S. V Ο,' X 'V \ s <\. XO <>. '<i \ íi \ X i \ OOSOS'ps> \, P ft \ 'Is ti'»'X),' - The rare earth metal compounds. \ 's _f , \ tnvt u'o 5-? dik, it.tirt «, n, ek nO ud ok-gyet a? oUatb from sut torosok as / d \ .u-dapn, \ '' \ \ Lrtt kü'ot, \> o- -pin <.e \! Based on the basis weight, the silica of the diethyldibxldsf u is separated (nm) (4 "^:;iW" .tw · ™ 3.64). az i '>Ό' Atdbo '' χ. ό ¹ pc! k ·, <unubovfö, fe> í n ”·, sv ''<\>''«.k's -un \ <o tyrcofe Ln. i *

The notices. űotálássat. Separation of titanium dioxide from the titanium dioxide by sedimentation, eeutralization, and sedation techniques. (original description}.

To give the hoe; titanium and silicon dioxide-containing sediment · water sediment mixture; Preferably, the oeotrifugation of 4,000 to 450,000 rpm is carried out by four densities, by density, into an aqueous phase containing one kg of FeAlAbnH and one oxide of silica (p-Oj) kg / dro ⁵ ). (2015.07.22)

To the resulting slurry / vlz sediment mixture was added oamum chlorthod and a saturated saline solution (p-2,165 kg / dnr'i) was added and floated to the top of the solution with lower density TiCb (ρ-1.9 Rg / dm?). i g - 3.8 kg''dm '') is settled on a saturated solution lead. {Priority: 22/07/2015}

V X '' <lem kjeifö o \ '' t> í euge bei c'xtt h'rwtfK 'tthfeft olo.'fa \ ux neszen -> n. After adding to the contaminated water, the resulting mixture is blocked to purify the contaminated mixture. flavor.

From the solution containing the metal chlorides, the iron and aluminum ions are selectively separated with ironClfloxide and ', m -j (. E' c A '*'.! -!!>, \ 'T.Kek («Ίοι ^r \? Ukllem οη > Rt / ma / O υό, χ esabo 'until concentrated or dry evaporated.

Figure L; the red; Composition of sludge (lips te; u Composition of timearhaa Figure .2; Rare earth composition of red sludge formed in lips alumina plant (MAI)

Figure A: Chemical composition of the detailed trace element content of the red mud of Azajka

Description of the diagrams;

Claims (4)

The ttihL './; ab, n; In the taNa / m, the percentage composition of the main components of the red mud is given. In addition to these, many other metals can be measured in ppm. for example, the percentage composition of the rare earths chemical composition is prevented. A. The valuable rare earth metal content of the red sludge, as shown in Figure 2, is given in ppm. In the table in the third figure, the red mud trace element is stored We would like to illustrate our solution with the following examples; EXAMPLE L: Red Sludge Fat Dispersion: The red stomach p used has a moisture content of 10%, has a pH of about 12, has been neutralized with acidity, and the resulting N.k'1 series of sue dtavhtmk has been restored to below 10% of the "ground-wet" * obtained using 200-250 kp / ent press speeds, for example construction blocks are pressed. Example 2: Utilization of red slurry after dissolution of hydrochloric acid soluble metals. The l. Following the procedure of Example 1, the soluble metal content of the red slurry is dissolved in dilute hydrochloric acid only after neutralization. The metal salt solution is removed from the pellet mixture and washed free of metal salt. From the thus neutralized, salt-free red sludge residue, the construction molded bodies of Example 1 were pressed with a phaebob fuzz at 21) 0-250 kpfem2. Example I: Example 2 is now being pressed live - the red slurry residue is treated with hot concentrated sulfuric acid and the dissolved titanium sulfate, titanium osyl sulfate. for further utilization eh, 0wl | ti \ a shin ucap rhyme 'moe' is tgv coupon red tv, ^ p rn ^ tadek aleoek sas <> mdego maradu verb with lime and leave calcium oxide to neutralize the remaining acidity. The performance of the raw material thus obtained is improved by the addition of 5% poriland cement. The procedure was continued as in Example I. Example 4: yoke of Example .This 2... The settled sediment from the top, peeling off of the iron chloride (salt) solution (jeslcmzően) easily removable (e.g. szuröpréseléssel centrifugal pumping etc. i Λ residue Ο ^Λ 02 von- s ? p utraadck a \ ek ttt nd \ Jo tcrat, β h ott out t eg- '< concentration suitable for recovery. In the event that a non-masonry block is pressed from the red sludge residue, it will be flushed with water! 2: 1 ~ pellet: dilute the red sludge residue pellet mixture to a liquid phase ratio and centrifuge to remove the titanium doxide from the silicon dlox by centrifugation. Example 2: Preparation of a solution containing iron and ahtminiurochloride for the preparation of a water-purifying flocculant from red sludge. The red sludge is neutralized with waste hydrochloric acid to a pH of about -6.5-7.5.-0. -the sediment mixture containing the silicon and liana dloxide containing solid particles is introduced into a basin of at least 50 n where the solid particles are sedimented along the length of the basin and the solution containing pure metal chlorides is drained at the end of the basin, or 3 poultry phases The excess water is removed and the remaining sardine phase is bagged and transported to its destination. Example: Preparation of a solution containing iron and alumimom chloride in lemon chloride for the preparation of a water purifying flocculant from red sludge. The red sludge waste with hydrochloric acid is neutral fkb. pR ~ 7 / 0.5-7.5 /). The solution / solid particle sediments (containing srilleium and thas-dloxld) thus worn are fed into a modem of at least 50 meters in length, where solid particles settle over the length of the basin. and dropping at the end of the basin a solution containing the pure metal chlorides. the excess water is removed, and the remaining crystallized solid phase is shaken and destined. száibtmk. (ri ricüri {health-care-stuff vriülriüririü ü Itriyt waterworks riririarire mr líívsv · rik-w rizriüüÜhhizsrixraes níriHyí verik odísízilveri ri Example 7: The procedure was carried out as in Example 5, except that on five occasions of water removal, the iron was precipitated by aeration, and the aluminum chloride was hydrolyzed to an aluminum hydroxide by hydrolysis. then the remaining liquid phase is subjected to an ion exchange to selectively extract the rare earth metals. Ü. example: pel Pel 4, which is a solution saturated as a liquid, saturated as cubic acid, ng, tp, 'tck kg / dm ^? ), so the SIO (q ^::: 3, kg / dm ') will settle at the bottom of the saturated NaCl solution, while T5O ((> 1.9 kg / dmri) will float at the top of the saturated brine. 1. 'i ί-. has ».» Controversial chinese tatodon: gate «falls ak>» la U'i'vt _t apui i '' mA ·· tóeu oaul Our vetoes are nt> «aőc \ aat © natiun lake>.enitóMtescte,> t 'cubait oentóo . ke '«e,?: \ t»' a ''> k „h íí-s. \\> i. there ο ^ς e \ 11 ^Cl '\ <>' -? ' iwü k'í;ctós> ri.n kb pl 's' «w ', \ <ι \ κ \ ί;' checker ',.-avn ^ al pctk'«'> knP.ukk xxew.d) ko ..'. uiobo>. :: to.k _s vü ste.es solution cause the \ e: o? te .. apb.is <o \ idi e ^ ou \ metal body) content of .sa ntka total compounds from ferric chloride based solution, remaining on the siccate based on acid solution 1 0? t><«\ kg «lake! otóntó s _v > i Horse 's \ v. w, characterized in that the red mud separated from the iron chloride-based gemstone is oleateek zagMa'tebuak'l tohoh senn ί WámH <»\ jdot a víitóosn-dknulmt e \? og-koto. we made titanium from your vanilla toto by a method known per se, (the separation of the chanotype is, for example, the oc-W \ g \ l \ itself known as the ako \ mtóeke 'i'.iio's lake' (Superior: 2 «U2» 2a; '»Toi A, a'!> Y, -> oí -. <\. \ 'Υ: ν.ί eh-eos., Characterized by toriéi.ornk ttei, tói !, y? S fi, 1! i 'b \ -> / ^ (1' thank UO \? ι k, »'* lake \ 0> 1 í k <.) íOvOktenufol from szükltnn'd'iovtdt (Priority: .tetem Otto