Sachtleben Chemie Gmbh

Metallgesellschaft Aktiengesellschaft

Djamschid Amirzadeh-Asl

Wolf-Dieter Griebler

Dieter Fünders

Karl-Heinz Schwarz

Jürgen Bäuml

Udo Selter

Dieter F&uuml;nders

Wolfgang Roder

A method for the introduction of inorganic solid bodies into hot, liquid melts, whereby inorganic solid bodies are added to a plastic containing hydrocarbon and the mixture obtained is added to the hot, liquid melt.

Process for the introduction of inorganic solids into hot liquid melts

An aggregate and/or filler extracted from slag, a method for the production thereof, and the use thereof.

Aggregate and filler extracted from slag

A titanium-containing additive, a method for its production and methods of using the additive.

Titanium-containing additive

The invention relates to a method for producing carbon or HV graphite electrodes, in which a carbon carrier is mixed with a hydrocarbon-containing binder, and the mixture is subjected to a coking process and/or graphitization process, and one or more synthetic titanium compounds are additionally added to the raw materials. The titanium compound is preferably comprised of TiO. Iron oxide can be added as an accompanying substance.

Method for improving the durability of carbon or graphite electrodes by using Tio2&#x2014;containing products

Barium sulfate particles having an average particle diameter dof from 0.1 to 10 &#x3bc;m which are produced by precipitation can be dispersed better if they are covered with at least one organic additive.

Barium sulfate, process for its preparation, and its use

A process for the production of finely particulate, inorganic solids by precipitation of the finely particulate inorganic solids from solution is described, in which the surface of the inorganic solids particles is covered (coated) with at least one additive, in which the additive(s) contains a dispersing agent or deflocculating agent, in which the proportion of the additives is overall at most 80 wt. %, preferably at most 40 wt. % or 30 wt. % and particularly preferably at most 15 wt. % of the coated solids, and wherein the additive(s) is added to the starting solution or solutions. Uses of the inorganic solids produced according to the invention are also described.

Method for producing inorganic solid substances in the form of fine coated particles and the use thereof

This patent describes the use of barium sulfate as filler for thermosetting and thermoplastic plastics, elastomers, sealants, adhesives, fillers, varnishes, paints, paper, glass and as substrate for colored pigment formulations as well as for single-layer or multilayer coatings consisting of metal oxides, metal oxide mixtures and/or metal compounds, as a nucleus of crystallization for lead sulfate in the negative electrode paste of lead accumulators and as an X-ray contrast medium, the barium sulfate being produced by a continuous process wherein a barium salt solution and a sulfate solution are simultaneously and continuously brought together in equimolar quantities in a precipitating suspension at a temperature of 30 to 90&#xb0; C., with constant stirring, the precipitating suspension is withdrawn continuously in a steady volume and the barium sulfate precipitate is filtered, washed and optionally dried, wherein the barium salt solution has a concentration of 0.1 to 0.8 Bamol/l and the sulfuric acid has a concentration of 0.1 to 2.0 SOmol/l, and the flow rate and stirring speed are controlled, at a constant precipitation volume, in such a way that a pH value of 1 to 5 is obtained in the precipitating suspension, and the lamellar barium sulfate particles produced as result of the precipitation are 0.1 to 50 &#x3bc;m wide, 0.1 to 50 &#x3bc;m long and 0.1 to 2 &#x3bc;m thick and the needle-shaped particles produced as result of the precipitation are 1 to 50 &#x3bc;m long and 0.1 to 2 &#x3bc;m thick, the ratio of length or width to the thickness being 3:1 to 500:1.

Process for producing barium sulfate, barium sulfate and use thereof

Disclosed is a method for producing coated, fine-particle, inorganic solids, the surface of which is coated with fine inorganic solid particles containing at least two different organic additives. At least one of said additives contains a wetting agent, dispersing agent, or deflocculant. The additives represent a maximum of 15 percent by weight of the coated solids.

Method for the production of coated, fine-particle, inorganic solids and use thereof

In order to reduce wear on refractory linings due to corrosion and the infiltration of slags and molten metals, particulate materials containing TiO are added to the refractory products consisting of a mixture of aggregates and binding agents.

Use of particulate materials containing TiO2 in refractory products

A fine-grained product with a grain size of 100%<5 mm is obtained during the production of titanium dioxide in the chloride method in which titanium-containing raw material is reacted with gaseous chlorine in the presence of a carbon-rich substance, preferably coal and/or coke, in a chlorination reactor, preferably with a fluidized bed, to form titanium tetrachloride, the fine-grained product consisting, in the dried state, of the main constituents TiO , coal and SiO , mixed with filter salt (iron sulfate that is obtained during dilute acid recovery), residues containing TiO from TiO -production according to the sulfate method, coal, sulfur, and ilmenite/TiO -slag. This mixture is treated in a fluidized bed furnace or rotating tubular furnace at temperatures of 900 to 1,300&deg; C. The mixture is used as a flux for the purpose of improving the durability of the brick lining of a furnace for the smelting-metallurgical production of metallic materials.

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Djamschid Amirzadeh-Asl