Abstract: A condenser for isolating solid substances from a vapor and gas mixture and pulps comprises a vertical cylindrical casing having a conical bottom and a vertical rotary drum accommodated in the casing and adjoining with its outer periphery to vertically extending internal protrusions of the casing walls in such a manner that the drum and the protrusions form a vertical transversal partition wall which is in a spaced relationship with respect to the casing bottom, and the interior of the casing represents a U-shaped space. Pipes for admission of a vapor and gas mixture and a pulp that does not contain rare-earth metals are provided in the upper portion of one inlet branch of the U-shaped space, and a pipe for discharge of the vapor and gas mixture cleaned from solid substances is provided in the upper portion of the other outlet branch of the U-shaped space. A pipe for removal of solid substances is provided in the lower portion of the conical bottom.

Abstract: The apparatus according to the invention comprises a casing. The casing consists of two chambers: an inlet chamber and a filtering chamber each having a conical receptacle for collecting solid chlorides. The inlet chamber and the filtering chamber are provided each with guide webs and are separated from each other by a partition wall comprising a gas duct. The gas duct establishes a communication between the lower portions of the chambers in such a manner that the inlet end of the gas duct is arranged under the guide webs of the inlet chamber and the outlet end is arranged under the guide webs of the filtering chamber. The filtering chamber has inlet pipes for admission of pulp. A pipe for admission of a chloride pulp is arranged above the guide webs at a distance of from one to two times the diameter of the filtering chamber. The pipes for an oxychloride pulp is arranged below the guide webs which are permanently covered with a filtering material.

Abstract: A raw mix for the production of portland cement mix consists of a lime component, a clay component, an iron-containing component, and a modifying additive comprising hydrolysis and yeast production waste liquors and products of neutralization of chlorine-containing off-gas from titanium and magnesium production, with the following proportioning of the components (% by weight):______________________________________ lime component 50-52 clay component 7.5-10 iron-containing component 1-1.5 hydrolysis and yeast production waste liquors 30-38 products of neutralization of chlorine- containing off-gas from titanium and magnesium production 1-9. ______________________________________The raw mix according to the invention exhibits improved physico-chemical and mechanical properties. Fluidity of the mix is from 58 to 60 mm, the degree of decarbonization is as high as 18%. Clinker prepared from the mix according to the invention has a strength of from 550 to 560 kgf/cm.sup.2, and the roasting temperature is 80.degree.

Abstract: According to the invention, the raw mix for producing portland cement clinker comprises a lime component, a clay component, an iron-containing component and a modifying agent. The latter is a cake byproduct readily available at titanium and magnesium works. The percentage by weight composition of the mix is as follows:______________________________________ lime component, 88.3 to 77.8 clay component, 9.2 to 11.2 iron-containing component, 2.0 to 5.0 modifying agent, 0.5 to 6.0 ______________________________________The raw mix according to the invention possesses better properties than conventional mixes. For example, its plasticity is 140 to 160 units, and the degree of mineralization is as high as 19 percent.

Abstract: A process for the preparation of Portland cement clinker resides in that limey, clayey and iron-containing components are ground together. The mix is then homogeneized pelletized, decarbonized at 800.degree. to 1000.degree. C. and roasted at 1200.degree. to 1350.degree. C. Dust sublimates--wastes of the titanium production--are added at the stage of grinding or homogeneization in an amount of 0.5 to 6.0% by total weight of raw mix, and, in case the dust sublimates are added at the homogeneization stage, an aqueous suspension of cakes--wastes of the titanium and magnesium production--is added at the pelletizing stage, at a volumetric ratio of water to cakes of 3-6:1, and in an amount of 10 to 14% by total weight of raw mix.The process according to the invention enables the preparation of clinker exhibiting an improved strength. With the process according to the invention, the degree of decarbonization of raw mix is as high as 35-50%, and roasting temperature is 120.degree.-150.degree. C. lower.

Abstract: A graphitization and reducing charge intended for thermal processing of carbon and graphite products consists of 85 to 95 percent by mass of coke containing not less than 90 percent by volume of size fraction ranging from 0.5 to 2 mm and not more than 10 percent by volume of size fraction ranging from 2 to 10 mm and of 5 to 15 percent by mass of sawdust.The graphitization charge, after having been subjected to not less than 2000.degree. C. in the graphitization oven, may be used as a reducing agent in ferrous and nonferrous metallurgy. As a reducing agent it possesses greater reactivity than known reducing agents, since its oxidation capacity is 54%.The use of the aforesaid charge provides a means to economize coke which is a scarce carbon material.

Abstract: The method of preparing a batch for the manufacture of clay bricks consists in that clay is mixed with chloride wastes of non-ferrous metallurgy, that are used as additives in the form of their aqueous solution, added in the quantity of from 5 to 20 per cent with respect to the weight of clay, which is obtained by dissolving said chloride wastes in water and adjusting the pH of the resultant solution to 1-5 and the density of the solution to 1.03-1.1 g/cc, depending on the mineralogical composition of the clay.