Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
  • C09D7/40—Additives
  • C09D7/60—Additives non-macromolecular
  • C09D7/61—Additives non-macromolecular inorganic
  • C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
• • 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
  • C04B18/14—Waste materials; Refuse from metallurgical processes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
  • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
  • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
  • B01J20/0211—Compounds of Ti, Zr, Hf
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
  • B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
  • B01J21/063—Titanium; Oxides or hydroxides thereof
• • 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
  • C04B18/02—Agglomerated materials, e.g. artificial aggregates
  • C04B18/021—Agglomerated materials, e.g. artificial aggregates agglomerated by a mineral binder, e.g. cement
• • 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
  • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
  • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium 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
  • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
  • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
  • C04B40/0039—Premixtures of ingredients
• • 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
  • C04B5/00—Treatment of  metallurgical  slag ; Artificial stone from molten  metallurgical  slag 
• • 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
  • C04B7/00—Hydraulic cements
  • C04B7/24—Cements from oil shales, residues or waste other than slag
• • C—CHEMISTRY; METALLURGY
  • C05—FERTILISERS; MANUFACTURE THEREOF
  • C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
  • C05D9/00—Other inorganic fertilisers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
  • C08K3/013—Fillers, pigments or reinforcing additives
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
• • 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
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F27—FURNACES; KILNS; OVENS; RETORTS
  • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
  • F27D3/00—Charging; Discharging; Manipulation of charge
  • F27D3/0033—Charging; Discharging; Manipulation of charge charging of particulate material
• • 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
  • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
  • C04B2111/20—Resistance against chemical, physical or biological attack
  • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
• • 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
  • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
  • C04B2111/72—Repairing or restoring existing buildings or building materials
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2555/00—Characteristics of bituminous mixtures
  • C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
  • C08L2555/50—Inorganic non-macromolecular ingredients
  • C08L2555/52—Aggregate, e.g. crushed stone, sand, gravel or cement
• • C—CHEMISTRY; METALLURGY
  • C21—METALLURGY OF IRON
  • C21B—MANUFACTURE OF IRON OR STEEL
  • C21B2200/00—Recycling of non-gaseous waste material
• • C—CHEMISTRY; METALLURGY
  • C21—METALLURGY OF IRON
  • C21B—MANUFACTURE OF IRON OR STEEL
  • C21B2400/00—Treatment of slags originating from iron or steel processes
  • C21B2400/02—Physical or chemical treatment of slags
  • C21B2400/022—Methods of cooling or quenching molten slag
  • C21B2400/028—Methods of cooling or quenching molten slag with the permanent addition of cooled slag or other solids
• • C—CHEMISTRY; METALLURGY
  • C21—METALLURGY OF IRON
  • C21B—MANUFACTURE OF IRON OR STEEL
  • C21B7/00—Blast furnaces
  • C21B7/04—Blast furnaces with special refractories
  • C21B7/06—Linings for furnaces
• • 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
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P10/00—Technologies related to metal processing
  • Y02P10/20—Recycling
• • 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
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P40/00—Technologies relating to the processing of minerals
  • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
• • 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
• • 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

Definitions

• Titanium-containing aggregate process for its preparation and its
• the invention relates to a titanium-containing aggregate, process for its preparation and its use in metallurgical processes, in particular for introduction in the cupola, furnace and shaft and blast furnace, as aggregate and / or filler for concrete, cement, asphalt, refractory materials, repair materials, Simple, low-permeability coatings such as landfill covers, for filling manholes and underground cavities, for sealing and strengthening the ground, for landscaping or road construction and for use in metallurgy to increase the durability of Ofenausmauerept and / or slag formers for controlling the slag viscosity in metallurgical vessels, for lowering the melting point of slags, as fertilizer or aggregate (raw material) for cement production, as a catalyst.
• Titanium dioxide-containing raw materials slag, ilmenite
• slag, ilmenite dried and ground and then digested with concentrated sulfuric acid.
• the reaction between the raw materials and the concentrated sulfuric acid is
• Digestion reaction all present in the raw materials metal oxides, which react with sulfuric acid, converted into the corresponding metal sulfates. After the reaction remains a solid mass (digestion cake) which is dissolved with water and / or dilute sulfuric acid.
• the digestion solution the so-called black liquor or black liquor, is completely removed from the undissolved constituents by sedimentation and filtration processes
• a metatitanic acid suspension is prepared from the solids-free digestion solution, by hydrolysis.
• the metatitanic acid is after washing, bleaching and
• the digestion residues which depend on the raw materials used consisting essentially of titanium dioxide, silicon dioxide, aluminum and iron oxide and adhering metal sulfates, eg titanyl sulfate, iron sulfate, magnesium sulfate, aluminum sulfate and adhering sulfuric acid, are separated by conventional solid / liquid separation processes such as sedimentation and filtration. These process steps largely, but not completely, remove the soluble TiO 2 constituents still adhering to the digestion residues and the adhering metal sulfates and sulfuric acid. The resulting in the solid / liquid separation processes as sediment or filter cake
• Digestion residues are mashed with water and / or dilute sulfuric acid and deposited after neutralization with usually calcium hydroxide suspension and re-filtration.
• washing steps which have different composition and different pH values (acidic to slightly alkaline), cf. suitable disposal and treated.
• titanium tetrachloride is obtained by chlorination of titanium-containing raw materials in a first step.
• the chlorination takes place at temperatures around 1000 ° C in one
• the moisture of the initial filter cake is usually at 20 to 40 wt.%.
• the digestion residue after the sulphate process may contain from 20 to 60% by weight of titanium dioxide. Instead of depositing this residue, it is desirable to make use of the remaining TiO 2 content.
• DE 29 51 749 C2 describes a process in which 5 to 95 wt .-% of a titanium dioxide-containing digestion residue, which was obtained by rotary filtration with subsequent washing, together with 95 to 5 wt .-% finely divided slag in sulfuric acid with a Content of> 86 wt .-% is digested.
• DE 40 27 105 A1 describes a process in which the digestion residue is treated with concentrated sulfuric acid while supplying energy, e.g. is digested in screws, rotary tubes or similar apparatus.
• Digestion residue in a membrane chamber filter press filtered and the digestion residue containing filter cake can with a basic
• TiO 2 residues as an aggregate in the metallurgical industry is known.
• DE-C-4419816 discloses a titanium-containing additive consisting of TiO 2 residues and further substances.
• DE-C-19705996 discloses a process for producing a TiO 2 -containing aggregate. In this case, a mixture of TiO 2 residues and iron or iron compounds at 200 to 1300 ° C is thermally treated.
• a disadvantage of this technical solution is the complicated dosage and mixing and subsequent thermal treatment of the TiO 2 residues with the respective further constituents of the additive.
• EP-A-0 61 1 740 describes the use of residues from the TiO 2 - Production (TiO 2 residues) with constituents other than titanium containing aggregate to increase the durability of the refractory lining of a furnace.
• TiO 2 -containing shaped bodies such as briquettes, pellets or granules are produced.
• Filling mine shafts and subterranean cavities, for sealing and consolidating the ground, for landscaping or road construction and for use in metallurgy to increase the durability of furnace linings and / or slag formers, to control slag viscosity metallurgical vessels, as a fertilizer or aggregate (raw material) can be used for cement production.
• the titanium-containing materials used to prepare the additive according to the invention generally contain 10 to 100 wt.%, Preferably 20 to 95 wt .-% TiO 2 , usually as TiO 2 or with other metals than titanates.
• synthetic titanium dioxide-containing materials those from the production of titanium dioxide, by the sulfate or chloride process, as intermediate or
• Co-products or residues from the ongoing TiO 2 production can be used. It is also possible that residues or wastes from the chemical industry or paper industry or from titanium extraction are used as synthetic titanium-containing materials.
• the typical titanium-containing residues are titanium-containing residues from TiO 2 production by the sulphate process or chloride process. It is likewise possible to advantageously use spent titanium-containing catalysts, for example DENOX catalysts or Claus catalysts, in the context of the invention. Furthermore, materials such as natural titanium support such. B llmenite, ilmenite sand, rutile sand and / or titanium slags (eg slag) which are capable of refractory under blast furnace reaction site conditions
• Titancarbonitride to be used.
• the above-mentioned synthetic and natural titanium-containing carriers can be used singly or in mixtures for the preparation.
• the used residues from the TiO 2 production can filter moist
• Filter cake or used as a powder can be used as a powder. Besides, these can be used as a powder. Besides, these can be used as a powder. Besides, these can be used as a powder.
• Residues sour, washed, unneutralized, partially neutralized or neutralized for the production of the additive according to the invention can be used.
• the additive according to the invention may contain, in addition to residues of TiO 2 production, further synthetic and / or natural titanium dioxide-containing materials selected from the materials listed below or mixtures thereof: Intermediate, domed and / or finished products from the production of titanium dioxide.
• the materials may originate from the production of titanium dioxide after the sulphate process as well as from the production of titanium dioxide by the chloride process.
• the intermediate and co-products may be withdrawn from the ongoing TiO 2 production;
• Residues from the chemical industry for example from TiO 2 -containing catalysts, in turn, for example, from DENOX catalysts or from papermaking (so-called Fangstoff).
• the additive according to the invention may contain further auxiliaries and / or additives, for example carbonaceous materials, reduction carbon and / or metal oxides, again for example iron oxides.
• the additive according to the invention can thus contain titanium dioxide-containing materials selected from titanium ores, titanium dioxide-rich slags, synthetic titanium dioxide-containing materials or a mixture of two or more of these materials in addition to the metal slags and the residues from TiO 2 production.
• the synthetic titanium dioxide-containing materials used to prepare the additive according to the invention generally contain about 10 to 100 wt .-%, preferably 20 to 95 wt .-% TiO 2 (calculated from the total titanium content).
• the additive can be subjected to a temperature treatment, preferably a drying, particularly preferably a thermal treatment at temperatures between 100 ° and 1200 ° C.
• the aggregate according to the invention contains from 5 to 90, preferably from 10 to 85, particularly preferably from 20 to 85, very particularly preferably from 30 to 80,% by weight of TiO 2 (calculated from the total titer content).
• the aggregate according to the invention may have a particle size between 0 and 15 cm, preferably between> 0 to 10 cm, more preferably between> 0 to 8 cm and most preferably between> 0 to 5 cm, the upper limit being included in each case ,
• the aggregate according to the invention may in particular also have a fineness of> 0 to 100 mm, preferably> 0 to 10 mm and particularly preferably of> 0 to 3 mm, the upper limit being included in each case.
• slags are used according to the invention, which are formed in the extraction of metals from the raw materials used as non-metallic substances.
• These slags are composed of basic oxides oxidic mixtures, which arise in the metal extraction in the Erzverhüttung and have porous to massive properties.
• slag is used as a secondary raw material in construction as aggregate for base courses or as an additive for cement.
• non-metallic substances are referred to in the art as metal slags and ironworks slags.
• the metallurgical slags are the slags produced in the extraction of metals such as aluminum, chromium, copper, lead, etc. They are also known as aluminum, chrome, copper and lead varnishes.
• the metal slag used is preferably the so-called aluminum salt slag. In addition to Al 2 O 3 , this slag still contains considerable amounts of aluminum nitride. The proportion of aluminum nitride may be up to 30 wt .-% or more, depending on the process control and method. Due to the AIN content, it is generally not possible to utilize the aluminum salt slags because, on contact with air or water, AIN reacts to undesired ammonia gas. Methods are known for working up and recycling such Al salt slags.
• the salt slag is crushed, separated by classification of the metallic portion. Subsequently, the salt components are washed out with water and thereby the resulting ammonia gases are converted by process gas purification into aluminum sulfate. After filtering off the water-insoluble oxides and crystallization of the dissolved molten salt then arise products that can be used as a low-cost raw material for the production of cement clinker and mineral wool. Despite elaborate treatment, however, a residual amount of aluminum remains unreacted as AIN or as ammonia in the product, which continues to cause a significant smell of ammonia. Only by thermal treatment, in particular complete drying, can the ammonia volatilize. However, this process is very expensive and not economical. A further disadvantage of metalworks slags is generally seen in the fact that they react very alkaline and as a result the usability is usually considerably restricted.
• nitride in the inventive use has the advantage that after production of the additive according to the invention, for example, when introduced into metallurgical furnace, the yield for the formation and deposition of titanium nitride and titanium carbonitride or on Feuerfestenausmauerungen is significantly accelerated.
• the ironworks slags are blast furnace, steelworks and secondary metallurgical slags.
• steelworks slag a distinction is made according to the production process of the steel.
• LDS LD slags
• electric furnace slags in the production of steel by the electric furnace process
• SM slags in the production of steel by the Siemens-Martin process.
• the majority of ironworks slag is used in construction and road construction.
• slags according to the invention in particular steelworks slags such as LD slag or electric furnace slag can be used.
• steelworks slags such as LD slag or electric furnace slag.
• the ironworks slags thus contain SiO 2 , Al 2 O 3 , CaO and / or MgO as main constituents. In addition, they still contain iron oxide, free iron and metal oxides and hydroxides. Due to the mineralogical and chemical composition as well as the physical properties of these slags, further processing steps are usually required before the slags can be recycled.
• the steelworks slags always contain free oxides, in particular free lime (CaO); MgO-rich slags also contain it free MgO (Table 2).
• the constituents of a basic slag from a cupola furnace are in% by weight, for example: 1
• the free lime content in the steel slag may be up to 10% by weight or more. With MgO, the free fraction is 8 wt% or more. Depending on the lime content of the LD slags, these are suitable as road building materials (with low lime content) or can be processed into fertilizers. The steelworks slags are therefore very alkaline, which significantly limits the usability.
• Slags can be used singly or in mixture in the production of titanium-containing aggregates.
• the additive according to the invention can be prepared by mixing the titanium-containing residues from the production of titanium dioxide with the slags from the metal extraction.
• different procedures are provided, and these are exemplified as follows.
• Metal slags are mixed with residues from TiO 2 production, for example by mixing in a mixer.
• the slags used may have a grain size of 0 to 200 mm, preferably 0 to 50 mm and especially preferably ⁇ 5 mm.
• the residues from the production of TiO 2 by the sulphate process and the chloride process can be used as filter cake individually or in a mixture.
• the metal slags used may have a grain size in this case of 0 to 80 mm, preferably 0 to 50 mm and particularly preferably of ⁇ 20 mm.
• the residues from TiO2 production after The sulphate process can be used as a filter cake individually or in a mixture.
• a finely divided, dry aggregate with a grain size of 100% ⁇ 4 mm, preferably ⁇ 2 mm and particularly preferably ⁇ 1 mm can be obtained.
• Such shaped bodies can have a particle size in the range of 0.5 cm to 10 cm, preferably 2 to 8 cm
• Coarse metal slags can be crushed on a crushing plant and then ground. It is also possible that the metal slags are first ground in a grinding-drying plant or before
• Crushing / grinding can be dried in a dryer. Subsequently, the ground slag is mixed with the filter moisture residues from TiO2 production. If necessary, this mixture can then be dried or thermally treated.
• the slag used after grinding has a sieve residue of 100% ⁇ 5 mm, especially of 100% ⁇ 3 mm and especially of 100% ⁇ 1 mm.
• the finished product as an additive has a grain size of> 0 to 5 mm, preferably> 0 to 3 mm and particularly preferably> 0 to 1 mm.
• chemically basic metal drosses are used according to the invention. If in the context of the invention of basic metal slags is spoken, including the chemically basic metal dross to understand. These metal slags may have a degree of basicity indicated by the slag number of more than 0.8, especially more than 1, especially more than 1, 2 and especially more than 1.5.
• the metallurgical basicity degree B is the molar ratio of the alkaline components, such as CaO, MgO, to the acidic ones Components in the slag, such as SiO 2 , the so-called
• the degree of basicity B is an empirical quantity which, in its simplest form, is the
• Slag components eg MgO, Al 2 O 3
• the concept of slag basicity B therefore does not correspond to the chemical basicity.
• basic slags At a basicity greater than one is called basic slags and at a basicity of less than one of acidic
• Quantity addition to highly alkaline metal slags a neutral product can be obtained, which is ideal for the above applications.
• the otherwise disadvantageous alkaline property of slags is used to neutralize the acidic residues from the production of TiO 2 .
• the slag and residues from the production of TiO 2 can generally be mixed in amounts depending on their pH values to give a pH of the product around the neutral point.
• resulting product has so often a pH of 5 to 1 1, preferably 6 to 10.
• the grain size is in the above ranges.
• the present invention is therefore an aggregate of titanium-containing residues from titanium dioxide production and slags from metal extraction, which is useful as aggregate and / or filler and by an inventive cost, energy-saving, technically easy to carry out process for the preparation of the resulting metal slags and residues TiO 2 preparation can be produced.
• the invention further provides a titanium-containing additive for use in metallurgical processes, in particular in metallurgical vessels and melting aggregates, to provide, in particular for use in high, cupola and shaft furnace provide.
• Another object of the present invention is to provide a titanium-containing additive for use in refractory materials, in spray, gutter and / or repair compounds.
• Another object of the present invention is to provide an additive for use in sizing to form a thin coating on molds, cores or casting tools. Various tasks such as heat insulation, smoothing, separation etc. are fulfilled.
• Another object of the present invention is to provide a titanium-containing additive for injection into metallurgical furnaces to increase the durability of the furnace linings as well as to influence the viscosity of the slag viscosity in the metallurgical furnace.
• Another object of the present invention is to provide a titanium-containing aggregate for incorporation into metallurgical furnaces to increase the durability of the furnace linings and at the same time as slag formers.
• Another object of the present invention is a titanium-containing To provide aggregate for incorporation into metallurgical furnaces to increase the durability of the furnace linings and at the same time as slag formers and to control slag viscosity.
• Another object of the present invention is to provide a titanium-containing aggregate for incorporation into metallurgical furnaces to increase the durability of the furnace linings and at the same time as slag formers and to lower the melting point of the slags.
• Another object of the present invention is to provide a titanium-containing additive for use in a stitch hole mass.
• Another object of the present invention is to provide a titanium-containing additive for use as an aggregate for building materials, for example for concrete and / or cement and in road construction.
• Another object of the present invention is to provide a titanium-containing additive for use as a filler and / or pigment.
• Another object of the present invention is to provide a titanium-containing aggregate for the low water permeable coatings such as landfill covers, for filling in mine shafts and underground cavities, for sealing and strengthening the ground, for landscaping or road construction.
• Another object of the present invention is to provide a titanium-containing additive for use as a fertilizer or aggregate (raw material) for cement production.
• a procedure of the invention is that the digestion solution from TiO 2 production is neutralized by the sulphate process before filtration with metal slags, then filtered and, if necessary, washed.
• Another procedure of the invention is that the digestion solution from production by the sulphate process or the cyclone dust from the production by the chloride process is first filtered and washed free of sulphate or chloride. Subsequently, the filter cake is slurried in water and neutralized with the addition of metal slags and filtered off. The filtration and washing is carried out according to the state of the art.
• Another procedure of the invention is that the addition of the residues from TiO 2 production takes place directly after the occurrence of slag melt in the steel mill at high temperatures. The addition can take place directly at these high temperatures or during the cooling of the melt.
• addition can also be carried out in downstream steps during the treatment of the metal slags directly in the respective production facilities.
• a titanium-containing aggregate can be prepared, which has a grain size of up to 15 cm.
• the aggregate can then be broken according to the prior art to different particle size and processed in different sieve fractions. The setting of the
• Grain size depends on the application of the aggregate.
• Titanium dioxide production is subjected together with the slags to a crushing step such as a grinding, crushing or similar method, wherein a particularly intimate mixing is achieved and so a particularly uniform neutralization can be achieved within the mixture.
• This aggregate thus obtained may have a grain size of 0.01 ⁇ up to 3mm, especially 0.1 ⁇ to 2 mm and is particularly well suited for injection into metallurgical vessels via injection lances.
• the grain size up to 150 mm, preferably up to 100 mm. If, however, the titanium-containing aggregate is blown into the blast furnace via the injection lances, the grain size is set to ⁇ 10 mm, preferably ⁇ 5 mm and very particularly ⁇ 3 mm, by breaking or grinding. In this procedure, the residues from the TiO 2 preparation unwashed, unwashed and partially or fully neutralized, but washed acidic, or washed and part. or fully neutralized. Residues from TiO 2 production can be used as a filter cake moisture or as a dry material.
• a method can be provided which on the one hand, by the formation of high temperature resistant and wear resistant Ti (C, N) compounds to protect the Ofenausmauerungen from premature wear on the other hand, to reduce the viscosity of the slag already in the blast furnace and thus both the
• the blast furnace slag is formed in the blast furnace where prevailing
• Blast furnace slag consists mainly of MgO, Al 2 O 3 , CaO and SiO 2 .
• the quality of the liquid blast furnace slag is determined by its chemical composition and the heat treatment conditions.
• Blast furnace slag is also its porosity. This can u. a. be influenced by suitable additives to liquid blast furnace slag. These additives have the task of regulating the release of the gases dissolved in the liquid slag. Thus, on the one hand, the release of the gases can be prevented or at least limited or intensified on the other, so that a large part of the gases released during the cooling can escape from the slag before solidification. Is influenced by these additives, the viscosity of the blast furnace slag such that a
• Viscosity reduction is achieved, the escape of gases during solidification is facilitated and prevents the inclusion of gas bubbles.

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• 2013
  • 2013-12-24 BR BR112015015692A patent/BR112015015692A2/pt not_active Application Discontinuation
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