NO157257B - MATERIALS ON ANIMAL BASIS, PROCEDURE FOR ITS MANUFACTURING AND USE THEREOF AS A FILLING OR ANTI-ANTI-ADDITIVE ADDITIVE MATERIAL. - Google Patents

MATERIALS ON ANIMAL BASIS, PROCEDURE FOR ITS MANUFACTURING AND USE THEREOF AS A FILLING OR ANTI-ANTI-ADDITIVE ADDITIVE MATERIAL. Download PDF

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Publication number
NO157257B
NO157257B NO813152A NO813152A NO157257B NO 157257 B NO157257 B NO 157257B NO 813152 A NO813152 A NO 813152A NO 813152 A NO813152 A NO 813152A NO 157257 B NO157257 B NO 157257B
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Norway
Prior art keywords
red mud
material according
neutralization
aluminum
added
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NO813152A
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Norwegian (no)
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NO157257C (en
NO813152L (en
Inventor
Werner Siegmund
Gerhard Bayer
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Mannesmann Ag
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Priority claimed from DE3035626A external-priority patent/DE3035626C2/en
Priority claimed from DE3035598A external-priority patent/DE3035598C2/en
Application filed by Mannesmann Ag filed Critical Mannesmann Ag
Publication of NO813152L publication Critical patent/NO813152L/en
Publication of NO157257B publication Critical patent/NO157257B/en
Publication of NO157257C publication Critical patent/NO157257C/en

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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
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
    • C01F7/06—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
    • C01F7/066—Treatment of the separated residue
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/0409—Waste from the purification of bauxite, e.g. red mud
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00—Details of pavings
    • E01C11/24—Methods or arrangements for preventing slipperiness or protecting against influences of the weather
    • E01C11/245—Methods or arrangements for preventing slipperiness or protecting against influences of the weather for preventing ice formation or for loosening ice, e.g. special additives to the paving material, resilient coatings
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00—Coherent pavings made in situ
    • E01C7/08—Coherent pavings made in situ made of road-metal and binders
    • E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
    • E01C7/182—Aggregate or filler materials, except those according to E01C7/26
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Organic Chemistry (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Analytical Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Housing For Livestock And Birds (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Description

Oppfinnelsens gjenstand er et materiale på rødslambasis til anvendelse ved legging av veidekker samt en fremgangsmåte til dets fremstilling. The object of the invention is a red mud-based material for use in laying road surfaces as well as a method for its production.

Fremstillingen av et materiale på basis av rødslam til anvendelse som fyllstoff i bituminøse masser for veidekker er kjent, f.eks. fra DE-PS 18 05 829. Ifølge dette patent er rød-slammet spesielt egnet for ovennevnte formål når det før adskillelse fra restalumininatluten blandes med 3-10 vekt-% kalk i form av brent eller lesket kalk, beregnet som CaO og referert til tørr rødslam. Den frafiltrerte rødslam tørkes deretter og males på vanlig måte. Kompletterende til tek-nikkens stand henvises dessuten til tysk patent 23 06 145, The production of a material based on red mud for use as a filler in bituminous masses for road surfaces is known, e.g. from DE-PS 18 05 829. According to this patent, the red mud is particularly suitable for the above purposes when, before separation from the residual aluminate liquor, it is mixed with 3-10% by weight of lime in the form of burnt or slaked lime, calculated as CaO and referred to dry red mud. The filtered red mud is then dried and ground in the usual way. Complementary to the state of the art, reference is also made to German patent 23 06 145,

som er et tillegg til tysk patent 18 05 829, ifølge hvilket ved en fordelaktig tørkningsfremgangsmåte, nemlig forstøv-ningstørkningen, doserbarheten av dette kjente fyllstoff, which is an addition to German patent 18 05 829, according to which by an advantageous drying method, namely spray drying, the doseability of this known filler,

også betegnet som rødfyllstoff, forbedres. En henvisning til oppberedning av rødslam under geldannelse kan ikke ut-ledes av disse publikasjoner. also referred to as red filler, is improved. A reference to the preparation of red mud during gel formation cannot be derived from these publications.

Oppfinnelsen vedrører et materiale på rødslambasis for anvendelse i veidekker, idet materialet er karakterisert ved at rødslammet inneholder gelformet aluminiumhydroksyd og alkalisalter, idet begge bestanddeler er dannet ved minst delvis nøytralisering av de i rødslammet inneholdte alkalier. The invention relates to a red mud-based material for use in road surfaces, the material being characterized in that the red mud contains gelled aluminum hydroxide and alkali salts, both components being formed by at least partial neutralization of the alkalis contained in the red mud.

Oppfinnelsen vedrører videre en fremgangsmåte til fremstilling av materialet på rødslambasis, idet fremgangsmåten er karakterisert ved at a) til rødslammet settes under omrøring et middel til nøytralisering av de i rødslammet inneholdte alkalier, The invention further relates to a method for producing the material on a red mud basis, the method being characterized in that a) a means for neutralizing the alkalis contained in the red mud is added to the red mud while stirring,

og and

b) den med nøytraliseringen dannede gel tørkes og oppmales deretter. b) the gel formed with the neutralization is dried and then ground up.

På ikke forutsebar måte er det aluminiumhydroksydgelholdige fyllstoff meget godt egnet for veidekker. Sluttproduktet er støvfritt. Fremstillingsmåten er enkel og billig. Unpredictably, the aluminum hydroxide gel-containing filler is very well suited for road surfaces. The end product is dust-free. The method of manufacture is simple and cheap.

Det ved Bayer-oppslutningen som avfallsprodukt dannede rød-slam (bauksittresiduet) inneholder i avhengighet av vaske-prosessen 1 - 1,5 vekt-% alkali (beregnet som NaOH) i form av vannoppløselig natriumaluminat og 3 - 13 vekt-% alkali i form av natriumaluminiumsilikat (Na20 . A^O^ . 2SiC>2 ) . The red mud (bauxite residue) formed as a waste product during the Bayer digestion contains, depending on the washing process, 1 - 1.5% by weight of alkali (calculated as NaOH) in the form of water-soluble sodium aluminate and 3 - 13% by weight of alkali in the form of sodium aluminum silicate (Na20 . A^O^ . 2SiC>2 ) .

Ved nøytraliseringen spaltes natriumaluminiumsilikat under utskillelse av gelformet Si02, gelformet Al(OH)^ og det tilsvarende natriumsalt. During the neutralization, sodium aluminum silicate splits with the release of gel-form SiO2, gel-form Al(OH)^ and the corresponding sodium salt.

Som nøytralisasjonsmiddel anvendes her fortrinnsvis sure aluminiumsalter, spesielt aluminiumklorid. Anvendelse av dette salt er av spesiell betydning på grunn av den ekstra dannelse av gelformet A1(0H)^. 1 stedet for aluminiumklorid kan det selvsagt også anvendes andre aluminiumsalter, f.eks. aluminiumsulfat og aluminiumnitrat. Acidic aluminum salts, especially aluminum chloride, are preferably used as neutralizing agent here. Use of this salt is of particular importance because of the additional formation of gelled Al(OH)^. 1 instead of aluminum chloride, other aluminum salts can of course also be used, e.g. aluminum sulfate and aluminum nitrate.

En ytterligere fordel ved fremgangsmåten ifølge oppfinnelsen skjer deri at til nøytralisasjon kan det også anvendes syrer, eventuelt billige avfallssyrer, spesielt saltsyre, svovelsyre eller blandinger av disse syrer. A further advantage of the method according to the invention is that acids, possibly cheap waste acids, especially hydrochloric acid, sulfuric acid or mixtures of these acids can also be used for neutralization.

Rødslammet anvendes ved den nye fremgangsmåten hensiktsmessig filterfuktig, altså med et restvanninnhold fra ca. 35 - 50 vekt-%. I denne tilstand har rødslammet en pastaformig konsistens. Aluminiumsaltet innarbeides hensiktsmessig i oppløst form i rødslammet. Ved opphevelse av skjæreinnvirkninger stivner rødslamsuspensjonen til en gel. Etter tørking av gelen, f.eks. i en dreietrommel-tørker ved en temperatur over 100°C foreligger et stykk-formet gods som etter avkjøling males til en kornstørrelse på under 1 mm. Maleproduktet er ikke hygroskopisk, godt risledyktig og viser en meget god bindeevne med bitumen eller asfalt. Ved tilsetning av høyere hydrokarboner, eksempelvis fyringsolje eller dieselolje før maling til tørrgods, kan fyllstoffets bindingsevne ytterligere økes. Nøytralisasjonsmidlets mengde er oppad begrenset ved rød-slammets alkaliinnhold. Den innstilles hver gang hensiktsmessig på den ønskede gelkonsistens. In the new method, the red sludge is used suitably filter-moist, i.e. with a residual water content of approx. 35 - 50% by weight. In this state, the red mud has a pasty consistency. The aluminum salt is appropriately incorporated in dissolved form into the red mud. Upon removal of shearing effects, the red mud suspension solidifies into a gel. After drying the gel, e.g. in a rotary drum dryer at a temperature above 100°C there is a piece-shaped material which, after cooling, is ground to a grain size of less than 1 mm. The paint product is not hygroscopic, has a good drip capacity and shows a very good bonding ability with bitumen or asphalt. By adding higher hydrocarbons, for example fuel oil or diesel oil before painting dry goods, the binding capacity of the filler can be further increased. The amount of the neutralizing agent is limited upwards by the alkali content of the red mud. It is set appropriately each time to the desired gel consistency.

I denne forbindelse må det videre ansees som overraskende at ovennevnte materiale på rødslambasis ved tilsetning av frosthemmende midler, spesielt natriumklorid, gir et utmer-ket frosthemmende tilslagsstoff for veilegning. Derved er det vesentlig at de i rødslammet inneholdte alkalier først nøytraliseres etter tilsetning av det frosthemmende middel. På ikke forutsebar måte forsinker nemlig aluminiumhydrok-sydgelen i det frosthemmende tilslagsstoff tilgang av vann til det frosthemmende middel og dermed dets for tidlige oppløsning,således at tilsetning av kostbare hydrofoberings-midler bortfaller. Sjansene for den praktiske anvendelse av frosthemmende midler i veilegning er dermed vesentlig øket. In this connection, it must also be considered surprising that the above-mentioned material on a red mud basis, when antifreeze agents are added, especially sodium chloride, provides an excellent antifreeze aggregate for guidance. It is therefore essential that the alkalis contained in the red mud are first neutralized after the addition of the antifreeze agent. Namely, in an unpredictable manner, the aluminum hydroxide sydgel in the anti-freeze aggregate delays the access of water to the anti-freeze agent and thus its premature dissolution, so that the addition of expensive hydrophobing agents is omitted. The chances of the practical use of antifreeze agents in guidance are thus significantly increased.

Anvendelsen av aluminiumklorid som nøytralisasjonsmiddel er av spesiell fordel på grunn av den samtidige dannelse av gelformet A1(0H)^ og natriumklorid, da kloridet allerede er til stede som frosthemmende tilsetning i rødslammet. Dessuten økes på denne måte geldelen. Ved tilsetning av natriumklorid flytendegjøres rødslammet således at det sure aluminiumsalt lar seg innarbeide i oppløst eller fast form i rødslamsuspensjonen som stivner til en gel ved opphevelse av skjæreinnvirkning. The use of aluminum chloride as a neutralizing agent is of particular advantage due to the simultaneous formation of gel-form Al(OH)^ and sodium chloride, as the chloride is already present as an antifreeze additive in the red mud. In addition, the gel part is increased in this way. By adding sodium chloride, the red mud is liquefied so that the acidic aluminum salt can be incorporated in dissolved or solid form into the red mud suspension, which solidifies into a gel when the shearing effect is removed.

Mengden av tilsatt krystallinsk natriumklorid utgjør The amount of crystalline sodium chloride added is

ca. 2 - 3 ganger rødslammet, referert til rødslammets tørr-residu. Mengden av nøytralisasjonsmiddel er oppad begrenset ved rødslammets alkaliinnhold. Den innstilles hver gang hensiktsmessig på den ønskede gelkonsistens. about. 2 - 3 times the red mud, referred to the dry residue of the red mud. The quantity of neutralizing agent is limited upwards by the alkali content of the red mud. It is set appropriately each time to the desired gel consistency.

Oppfinnelsen skal forklares nærmere ved hjelp av noen eksempler. The invention will be explained in more detail with the help of some examples.

Eksemp_el_l Example_el_l

Utgangsstoff er et filterfuktig rødslam med et vanninnhold på 46,3% og en samlet Na20-del på 6,1% (referert til tørrvekt). 1,1% Na20 foreligger i form av oppløselig natriumaluminat og 4,9% Na20 som uoppløselig natriumaluminiumsilikat. The starting material is a filter-moistened red mud with a water content of 46.3% and a total Na20 portion of 6.1% (referred to dry weight). 1.1% Na20 is available in the form of soluble sodium aluminate and 4.9% Na20 as insoluble sodium aluminum silicate.

2000 kg av ovennevnte rødslam underkastes en intens rørebe-handling, derved oppsto en flytende mask. I denne mask ble det satt 45 kg AlCl^ i form av 20%-ig oppløsning. Etter 5 minutters kontakttid dannet det seg en pasta som ble tørket i en trommeltørker ved en temperatur på 14 5°C uten tilbak-ningsforeteelser. Tørrgodset ble deretter tilblandet 5% dieselolje og malt til en kornstørrelse under 1 mm. Diesel-oljetilsetningen påvirket ikke tørrgodsets gode maleegenskaper. Det ble aannet et ikke-støvende produkt med meget gode fyllstoffegenskaper. 2,000 kg of the above-mentioned red mud is subjected to an intense stirring treatment, thereby creating a liquid mask. In this mask, 45 kg of AlCl^ was added in the form of a 20% solution. After a contact time of 5 minutes, a paste was formed which was dried in a tumble drier at a temperature of 145°C without caking. The dry material was then mixed with 5% diesel oil and ground to a grain size below 1 mm. The addition of diesel oil did not affect the good grinding properties of the dry goods. It was considered a non-dusting product with very good filler properties.

Eksermoel 2_ Exermoel 2_

1000 kg rødslam ifølge eksempel 1 ble i en tvangsblander utsatt for høye skjærekrefter, idet det oppsto en flytende mask. TH masken ble det blandet 45 kg H2S0^ i form av 4 0%-ig svovelsyre. Under varmeutvikling inntrådte etter 1000 kg of red mud according to example 1 was subjected to high shearing forces in a forced mixer, as a liquid mask was formed. TH mask was mixed with 45 kg of H2S0^ in the form of 40% sulfuric acid. During heat development occurred after

4 minutter en fastgjøring til et pastaformet materiale. Pastaen ble tørket i en trommeltørker ved en temperatur 4 minutes a fixation to a pasty material. The paste was dried in a drum dryer at a temperature

på 140°C, idet det i selve tørkeren ikke inntrådte noen sammenbakninger. Tørkegodset lar seg etter tilsetning av 5% dieselolje uten støvutvikling male til en korn-størrelse under 1 mm. Produktet har en pH-verdi på 6,0 at 140°C, as no caking occurred in the dryer itself. After adding 5% diesel oil, the dried material can be ground to a grain size of less than 1 mm without generating dust. The product has a pH value of 6.0

og viser fremragende fyllstoffegenskaper ved anvendelse i veilegning. and shows excellent filler properties when used in guidance.

Eksempel_3_ Example_3_

Utgangspunktet er et rødslam med et vanninnhold på 42% The starting point is a red mud with a water content of 42%

vann og et Na20-innhold på 6,1% (referert til tørrvekt). water and a Na2O content of 6.1% (referred to dry weight).

1,1% Na20 foreligger som natriumaluminat og 5% Na20 i form av natriumaluminiumsilikat. 1.1% Na20 is available as sodium aluminate and 5% Na20 in the form of sodium aluminum silicate.

100 kg av dette rødslam blandes godt med 100 kg koksalt, 100 kg of this red mud is mixed well with 100 kg of common salt,

det oppstår en flytende mask. Denne mask innblandes 20 kg aluminiumkiorid-oppløsning (tilsvarende 4,7 kg AlCl^). a liquid mask is created. This mask is mixed with 20 kg of aluminum chloride solution (corresponding to 4.7 kg of AlCl^).

Under varmeutvikling danner det seg en pasta som uten sammenbakninger kan tørkes i en trommeltørker ved 130°C. Tørke-godset er ikke hygroskopisk og viser ved maling til en korn-størrelse på under 1 mm gode maleegenskaper. Tilsettes til tørrgodset før malingen 5% dieselolje, så nedsettes støv-dannelsen, idet maleegenskapene ikke ødelegges. During heat development, a paste is formed which can be dried in a tumble drier at 130°C without caking. The dry material is not hygroscopic and shows good grinding properties when ground to a grain size of less than 1 mm. If 5% diesel oil is added to the dry goods before painting, the formation of dust is reduced, as the painting properties are not destroyed.

Dette materiale kan anvendes som f rosthemmende tilslagssto.fi:. This material can be used as anti-frost aggregate.fi:.

Eksemp_el_4 Example_el_4

100 kg rødslam ifølge eksempel 3 underkastes etter tilsetning av 100 kg koksalt en blandebehandling, idet det oppstår en flytende blanding. I masken innblandes 10 kg HC1 36%-ig. Under varmeutvikling inntrer en fastgjøring til en hard masse. Reaksjonsproduktet tørkes i en trommel-tørker ved 145°C og etter tilsetning av 6% lett fyringsolje males til en kornstørrelse under 1 mm. Tørrgodset lar seg meget godt male i blanding med lett fyringsolje med liten støvdannelse. 100 kg of red mud according to example 3 is subjected to a mixing treatment after the addition of 100 kg of sodium chloride, resulting in a liquid mixture. 10 kg of HC1 36% is mixed into the mask. During heat development, a fixation occurs into a hard mass. The reaction product is dried in a drum dryer at 145°C and, after adding 6% light fuel oil, is ground to a grain size below 1 mm. The dry material can be ground very well in a mixture with light fuel oil with little dust formation.

Til slutt skal det dessuten nevnes at et ifølge eksemplene fremstilt tilslagsstoff i et bituminøst veidekke skal ut-gjøre ca. 4-5%. Det kan da regnes med den ønskede fryse-punktsenkning av overflatevannet. Finally, it should also be mentioned that an aggregate produced according to the examples in a bituminous road surface must amount to approx. 4-5%. The desired freezing point lowering of the surface water can then be calculated.

Claims (20)

1. Material på rødslambasis for anvendelse i veidekker, karakterisert ved at rødslammet inneholder gelformet aluminiumhydroksyd og alkalisalter, idet begge bestanddeler er dannet ved minst delvis nøytralisering av de i rødslammet inneholdte alkalier.1. Red mud-based material for use in road surfaces, characterized in that the red mud contains gelled aluminum hydroxide and alkali salts, both components being formed by at least partial neutralization of the alkalis contained in the red mud. 2. Material ifølge krav 1, karakterisert ved at rødslammet i tillegg inneholder gelformet silisiumdioksyd.2. Material according to claim 1, characterized in that the red mud also contains gelled silicon dioxide. 3. Material ifølge krav 1, karakterisert ved at rødslammet inneholder gelformet aluminiumhydroksyd som er dannet ved nøy-tralisering av de i rødslammet i form av natriumaluminat inneholdte oppløste alkalier.3. Material according to claim 1, characterized in that the red mud contains gelled aluminum hydroxide which is formed by neutralizing the dissolved alkalis contained in the red mud in the form of sodium aluminate. 4. Material ifølge krav 2 og 3, karakterisert ved at rødslammet inneholder gelformede hydroksyder som er dannet ved nøy-tralisering av de i rødslammet i form av natriumaluminat inneholdte oppløste alkalier og de i form av natriumaluminiumsilikat inneholdte uoppløste alkalier.4. Material according to claims 2 and 3, characterized in that the red mud contains gelled hydroxides which are formed by neutralization of the dissolved alkalis contained in the red mud in the form of sodium aluminate and the undissolved alkalis contained in the form of sodium aluminum silicate. 5. Material ifølge krav 1-4, karakterisert ved at rødslammet i tillegg inneholder et frosthemmende middel, spesielt natriumklorid .5. Material according to claims 1-4, characterized by the fact that the red mud also contains an antifreeze agent, especially sodium chloride. 6. Material ifølge krav 1-5, karakterisert ved at det har en korn-størrelse under 1 mm.6. Material according to claims 1-5, characterized in that it has a grain size of less than 1 mm. 7. Material ifølge krav 1-6, karakterisert ved at det på kornene er tilleiret høyere hydrokarboner.7. Material according to claims 1-6, characterized by higher hydrocarbons being deposited on the grains. 8. Material ifølge krav 7, karakterisert ved at til kornene er tilleiret dieselolje.8. Material according to claim 7, characterized in that diesel oil is added to the grains. 9. Fremgangsmåte til fremstilling av et material på rødslam-basis ifølge kravene 1-4, karakterisert ved at a) til rødslammet settes under omrøring et middel til nøy-tralisering av de i rødslammet inneholdte alkalier, og b) den ved nøytraliseringen dannede gel tørkes og oppmales deretter.9. Method for producing a material on a red mud basis according to claims 1-4, characterized in that a) an agent for neutralizing the alkalis contained in the red mud is added to the red mud while stirring, and b) the gel formed during the neutralization is dried and then ground. 10. Fremgangsmåte til fremstilling av et material ifølge krav 5, karakterisert ved at a) rødslammet blandes med et frosthemmende middel, spesielt natriumklorid, at b) til denne blanding settes under omrøring et middel til nøytralisering av de i rødslammet inneholdte alkalier, og c) den ved nøytraliseringen dannede gel tørkes og oppmales deretter.10. Method for producing a material according to claim 5, characterized in that a) the red mud is mixed with an antifreeze agent, in particular sodium chloride, that b) an agent for neutralizing the alkalis contained in the red mud is added to this mixture while stirring, and c) the gel formed during the neutralization is dried and then ground. 11. Fremgangsmåte ifølge krav 9 og 10, karakterisert ved at de i rødslammet i form av natriumaluminat oppløste alkalier nøytraliseres.11. Method according to claims 9 and 10, characterized in that the alkalis dissolved in the red mud in the form of sodium aluminate are neutralized. 12. Fremgangsmåte ifølge krav 9-11, karakterisert ved at de i rødslammet i form av natriumaluminiumsilikat inneholdte alkalier nøytraliseres.12. Method according to claims 9-11, characterized in that the alkalis contained in the red mud in the form of sodium aluminum silicate are neutralized. 13. Fremgangsmåte ifølge krav 9-12, karakterisert ved at nøytraliseringen gjennomføres med et surt aluminiumsalt, spesielt med aluminiumklorid og/eller aluminiumsulfat.13. Method according to claims 9-12, characterized in that the neutralization is carried out with an acidic aluminum salt, especially with aluminum chloride and/or aluminum sulfate. 14. Fremgangsmåte ifølge krav 9-12, karakterisert ved at nøytraliseringen gjennomføres med en uorganisk syre, spesielt saltsyre eller svovelsyre.14. Method according to claims 9-12, characterized in that the neutralization is carried out with an inorganic acid, especially hydrochloric or sulfuric acid. 15. Fremgangsmåte ifølge krav 13 og 14, karakterisert ved at nøytraliseringen gjennomføres med en blanding av et surt aluminiumsalt og en uorganisk syre.15. Method according to claims 13 and 14, characterized in that the neutralization is carried out with a mixture of an acidic aluminum salt and an inorganic acid. 16. Fremgangsmåte ifølge krav 9-15, karakterisert ved at det anvendes et rødslam med en restfuktighet fra 35-50 vekt-%.16. Method according to claims 9-15, characterized in that a red mud with a residual moisture of 35-50% by weight is used. 17. Fremgangsmåte ifølge krav 9-16, karakterisert ved at det til det tørkede material før oppmalingen settes et høyere hydrokarbon.17. Method according to claims 9-16, characterized in that a higher hydrocarbon is added to the dried material before grinding. 18. Fremgangsmåte ifølge krav 17, karakterisert ved at det til det tørkede material før oppmalingen settes dieselolje.18. Method according to claim 17, characterized in that diesel oil is added to the dried material prior to grinding. 19. Anvendelse av materialet ifølge krav 1-4 og 6-8 som fyllstoff.19. Use of the material according to claims 1-4 and 6-8 as filler. 20. Anvendelse av materialet ifølge krav 1-8 som frosthemmende tilslagsstoff.20. Use of the material according to claims 1-8 as frost-inhibiting aggregate.
NO813152A 1980-09-20 1981-09-16 MATERIALS ON ANIMAL BASIS, PROCEDURE FOR ITS MANUFACTURING AND USE THEREOF AS A FILLING OR ANTI-ANTI-ADDITIVE ADDITIVE MATERIAL. NO157257C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3035626A DE3035626C2 (en) 1980-09-20 1980-09-20 Process for the production of a frost-resistant aggregate based on red mud for road construction
DE3035598A DE3035598C2 (en) 1980-09-20 1980-09-20 Process for the manufacture of a red mud-based filler for road surfaces

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NO813152L NO813152L (en) 1982-03-22
NO157257B true NO157257B (en) 1987-11-09
NO157257C NO157257C (en) 1988-02-17

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DE3147773A1 (en) * 1981-11-30 1984-01-19 Mannesmann AG, 4000 Düsseldorf Additive for top surfacings of traffic areas
AUPS338102A0 (en) * 2002-07-04 2002-07-25 Nauveau Technology Investments Ltd Processes for the treatment of a waste material having a high ph and/or alkalinity
JP2009155160A (en) 2007-12-26 2009-07-16 Showa Denko Kk Method for neutralizing bauxite dissolution residual substance and method for producing aluminum hydroxide
CN108951337B (en) * 2018-09-30 2023-08-22 山东省交通科学研究院 Red mud-based light filler road extension splicing structure and method
CN112239345A (en) * 2020-09-10 2021-01-19 广东同创科鑫环保有限公司 Red mud-based highway cushion material
CN112341111B (en) * 2020-09-23 2022-07-22 广东同创科鑫环保有限公司 Red mud-based mine backfill material
CN112279541B (en) * 2020-09-23 2022-09-23 广东同创科鑫环保有限公司 Red mud-based highway base material and preparation method thereof
CN116041033B (en) * 2023-01-28 2023-06-06 山东绿达建设发展集团有限公司 Road base material and preparation method thereof

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DE1805829C3 (en) * 1968-10-29 1974-04-11 Vereinigte Aluminium-Werke Ag, 5300 Bonn Process for the production of a filler for bituminous masses from bauxite residues and its use
US3985567A (en) * 1974-09-18 1976-10-12 University Of Guyana Method of treating bauxite waste red mud with acid and making construction bricks from the treated material

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DE3163516D1 (en) 1984-06-14
EP0048417A1 (en) 1982-03-31
NO157257C (en) 1988-02-17
EP0048417B1 (en) 1984-05-09
FI70955B (en) 1986-07-18
FI812910L (en) 1982-03-21
NO813152L (en) 1982-03-22
FI70955C (en) 1986-10-27

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