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New Patents III mixing and dispersing section (6) being 20 times the width of the annular slot (Q3). The dist- ributing cone (2) and the middle piece (10) can be screwed together or inserted into each other. The air slot can be regulated by spacing rings (13). Screw-shaped strips (8) within the mixing and dispersing section (6) can generate therein a whirl. The aerating device has been tested for the flotation of mineral coal sludges. 4840985 treated for the insolubilization of the solid to be recovered and the formation of a suspension maintained under stirring conditions (stirrer 2), at least a flotation cell (5) supplied with said suspension, at least a device (4) provided bet- ween said vat (1) and said flotation cell (5) adap- ted to generate within the cell a rising non- turbulent stream intended to convey the desired solid towards the surface of said suspension while maintaining at said surface a calm area for the accumulation of said solid and at least one means for the recovery of said solid (6-7). GRINDING AGENT BASED AND[OR COPOLYMERS FOR AQUEOUS SUSPENSION OF COARSE MINERAL MATERIALS FOR PIGMENT APPLICATIONS Olivier Gonnet, Georges Ravet, Jacky Rousset, St AndrCorcy, Francn assigned to Coatex S A Grinding agent based upon acrylic polymers and/or copolymers for aqueous suspension of coarse mineral materials for applications in pig- ments. Grinding agent for aqueous suspensions of mineral materials intended for application in pigments, consisting of an acid acrylic polymer and/or copolymer which is partially neutralized by at least one neutralizing agent having at least one monovalent function. The grinding agent ac- cording to the invention is applicable more par- ticularly to the preparation by grinding of mineral materials such as calcium carbonate, dolomites, calcium sulphate, kaolin, titanium dioxide, intended for pigmentary applications as varied as paper coating, pigmentation of paints, fillers of rubbers or synthetic resins or matting synthetic textiles. 4844873 SEPARATION AND RECOVERY OF SOLIDS FROM LIQUIDS CONTAINING THEM USING THE IONIC FLOTATION PROCESS Marc Lebon, vost Michgra/e/ le Prgra/e/, El Jdid, Pierre Blazy, Etampes, France assigned to Institut National de Recherche Chimique Appli- que Improvement to the separation and recovery of solids from liqiuds containing them, and using a ionic flotation process, implementing an in- stallation characterized in that it comprises at least a vat (1) for pretreating the solution to be 4845191 PROCESS FOR GRINDING IN AQUEOUS SUSPENSION OF COARSE MINERAL INTENDED FOR PIGMENT APPLICATIONS Gabriel Hautier, Champagne au Mt d'OR, France assigned to Coatex Grinding agent for aqueous suspension of coarse mineral materials intended for pigment applications, composed of an alkaline acrylic polymer and/or copolymer, with an average specific viscosity of less than 0.8, formed of a fraction of this polymer and/or copolymer isolated by means of a polar solvent, the specific viscosity of said fraction comprised between 0.3 and 0.8. 4846884 PROCESS FOR PRODUCING COLD-BONDED IRON ORE FOR USE IN A BLAST FURNACE Tatsuhik Shigematsu, Minoru Ichidate, Chitose Shiotani, Yohzi Tozawa, Amagasaki, Japan as- signed to Sumitomo Metal Industries Ltd A process for producing cold-bonded or non- fired iron ore which introduced as a charge into a blast furnace. The iron ore, which contains 10 to 70~o of particles having a diameter ranging from 1 to 10 ram, is molded into a block, preferably by a pressure-molding method, a shock-molding method or a packing-molding method with vibrations. The block is then cured or hardened. This hardened block is crushed to have a pre- determined shape. An additive such as CaO, A1203, or MgO may be added to the iron ore to adjust the basicity as a whole to 0.8 to 2.0. Moreover, the molding step is conducted so that

4844873 Separation and recovery of solids from liquids containing them using the ionic flotation process

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New Patents III

mixing and dispersing section (6) being 20 times the width of the annular slot (Q3). The dist- ributing cone (2) and the middle piece (10) can be screwed together or inserted into each other. The air slot can be regulated by spacing rings (13). Screw-shaped strips (8) within the mixing and dispersing section ( 6 ) can generate therein a whirl. The aerating device has been tested for the flotation of mineral coal sludges.

4840985

treated for the insolubilization of the solid to be recovered and the formation of a suspension maintained under stirring conditions (stirrer 2), at least a flotation cell (5) supplied with said suspension, at least a device (4) provided bet- ween said vat (1) and said flotation cell (5) adap- ted to generate within the cell a rising non- turbulent stream intended to convey the desired solid towards the surface of said suspension while maintaining at said surface a calm area for the accumulation of said solid and at least one means for the recovery of said solid (6-7).

GRINDING AGENT BASED AND[OR COPOLYMERS FOR AQUEOUS SUSPENSION OF

COARSE MINERAL MATERIALS FOR PIGMENT APPLICATIONS

Olivier Gonnet, Georges Ravet, Jacky Rousset, St AndrCorcy, Francn assigned to Coatex S A

Grinding agent based upon acrylic polymers and/or copolymers for aqueous suspension of coarse mineral materials for applications in pig- ments. Grinding agent for aqueous suspensions of mineral materials intended for application in pigments, consisting of an acid acrylic polymer and/or copolymer which is partially neutralized by at least one neutralizing agent having at least one monovalent function. The grinding agent ac- cording to the invention is applicable more par- ticularly to the preparation by grinding of mineral materials such as calcium carbonate, dolomites, calcium sulphate, kaolin, titanium dioxide, intended for pigmentary applications as varied as paper coating, pigmentation of paints, fillers of rubbers or synthetic resins or matting synthetic textiles.

4844873

SEPARATION AND RECOVERY OF SOLIDS FROM LIQUIDS

CONTAINING THEM USING THE IONIC FLOTATION PROCESS

Marc Lebon, vost Michgra/e/ le Prgra/e/, El Jdid, Pierre Blazy, Etampes, France assigned to Institut National de Recherche Chimique Appli- que

Improvement to the separation and recovery of solids from liqiuds containing them, and using a ionic flotation process, implementing an in- stallation characterized in that it comprises at least a vat (1) for pretreating the solution to be

4845191

PROCESS FOR GRINDING IN AQUEOUS SUSPENSION OF

COARSE MINERAL INTENDED FOR PIGMENT APPLICATIONS

Gabriel Hautier, Champagne au Mt d'OR, France assigned to Coatex

Grinding agent for aqueous suspension of coarse mineral materials intended for pigment applications, composed of an alkaline acrylic polymer and/or copolymer, with an average specific viscosity of less than 0.8, formed of a fraction of this polymer and/or copolymer isolated by means of a polar solvent, the specific viscosity of said fraction comprised between 0.3 and 0.8.

4846884

PROCESS FOR PRODUCING COLD-BONDED IRON ORE FOR

USE IN A BLAST FURNACE

Tatsuhik Shigematsu, Minoru Ichidate, Chitose Shiotani, Yohzi Tozawa, Amagasaki, Japan as- signed to Sumitomo Metal Industries Ltd

A process for producing cold-bonded or non- fired iron ore which introduced as a charge into a blast furnace. The iron ore, which contains 10 to 70~o of particles having a diameter ranging from 1 to 10 ram, is molded into a block, preferably by a pressure-molding method, a shock-molding method or a packing-molding method with vibrations. The block is then cured or hardened. This hardened block is crushed to have a pre- determined shape. An additive such as CaO, A1203, or MgO may be added to the iron ore to adjust the basicity as a whole to 0.8 to 2.0. Moreover, the molding step is conducted so that