| Patent Number |
Title Of Patent |
Date Issued |
| 4921613 |
Method for purifying resin-containing waste liquor in the manufacture of cellulose pulps |
May 1, 1990 |
| The present invention solves the problem of managing resin-containing waste liquors within the cellulose pulp industry. The invention relates to a method for purifying resin-containing waste liquor in the manufacture of cellulose pulp, in which method a pH-adjusting chemical is, when |
| 4856716 |
Gyratory crusher control |
August 15, 1989 |
| A method for controlling a crushing gap width of a gyratory crusher of the kind including a crusher head is disclosed. The crusher head of the crusher is driven by a power unit and is positionally adjustable in relation to a crusher shell by a hydraulic motor. The hydraulic motor mov |
| 4780214 |
Treatment of mercury contaminated lakes |
October 25, 1988 |
| The present invention relates to a method for treating lakes with selenium with the intention of lowering the mercury content of fish, and is characterized by supplying to the lake selenium in the form of a selenium salt incorporated in a carrier material capable of dispensing selenium t |
| 4738762 |
Electrowinning system |
April 19, 1988 |
| The invention relates to an electrowinning cell for extracting metals in powder form from solutions, and simultaneously oxidizing the solution. The cell is characterized by radially extending electrodes comprising mutually alternating anodes and cathodes; by a diaphragm which delimits se |
| 4734172 |
Method for selectively recovering lead from complex sulphidic non-ferrous metal concentrates |
March 29, 1988 |
| The invention relates to a method for selectively recovering lead from complex sulphidic non-ferrous metal concentrates in an electrolytic cell incorporating at least one anode and one cathode and an electrolyte containing chlorine ions, at a temperature beneath the boiling point of |
| 4732679 |
Sewage-water purifying process |
March 22, 1988 |
| A water purifying method, particularly a sewage purification method, for eliminating nitrogen therefrom, in which (a) the water is subjected to a preprecipitation process with the aid of trivalent and/or multivalent metal salts for prereduction of incoming contaminants; (b) the NO.sub.3 |
| 4725164 |
Method of excavating a storage complex in rock for storing radioactive waste |
February 16, 1988 |
| The present invention relates to a method of excavating a storage complex in rock for storing radioactive material, or other harmful material. The complex to which the method relates comprises a hollow body which is formed from a solid material and the interior of which constitutes a |
| 4710277 |
Method for manufacturing zinc hydrometallurgically |
December 1, 1987 |
| The present invention relates to a method for manufacturing zinc hydrometallurgically from zinc-containing starting materials. The method comprises one or more leaching stages, one or more solution purifying stages and one or more electrowinning stages for recovering metallic zinc fr |
| 4708523 |
Rock cavity |
November 24, 1987 |
| A rock cavity for storing fluids, solid products for some other purpose, such as the protected manufacture or production of goods, comprising a substantially vertical, cylindrical rock cavity comprising a conical top section (14), and a conical or horizontal bottom section (15) and a |
| 4708522 |
Storage complex for storing radioactive material in rock formation |
November 24, 1987 |
| The present invention relates to a structure for storing radioactive material in rock, having a body (4) for accommodating radioactive material, the body (4) being encompassed by rock around which a cavity (3) may optionally be formed, there being arranged in the cavity a barrier (5) |
| 4705562 |
Method for working-up waste products containing valuable metals |
November 10, 1987 |
| The invention relates to a method for working-up valuable metal-bearing waste products, particularly but not exclusively copper scrap, containing a substantial amount of organic constituents, to a product form suitable for recovering the valuable-metal content, while expelling the organi |
| 4686105 |
Granular product containing magnesium oxide as its main constituent |
August 11, 1987 |
| The present invention relates to a granular product comprising a reaction product between magnesium oxide and phosphoric acid; this product exhibiting high solubility in neutral citrate solubility tests and the weight ratio of magnesium to phoshorous being smaller than 1.8:1. |
| 4681268 |
Autogenous grinding method |
July 21, 1987 |
| The present invention relates to a method for comminuting a coarse lump mineral material in an autogenous grinding system, in which feed to the grinder is divided into a coarse fraction and a fine fraction. The coarse fraction is coarser than the inflection point on the coarse side of th |
| 4663055 |
Method and apparatus for distributing water purifying chemicals |
May 5, 1987 |
| A method and apparatus for distributing a water purifying chemical, particularly a flocculating-agent concentrate, throughout a stream of water to be purified. In accordance with the method, the concentrate is introduced into the stream of water transversally to its direction of flow |
| 4652181 |
Storage complex for storing radioactive material in rock formations |
March 24, 1987 |
| The present invention relates to a storage plant for storing radioactive material in rock formations, the plant comprising a cavity (4) for accommodating radioactive material, the cavity (4) having therearound a rock shield (6) in which a further cavity (7) is optionally formed, there |
| 4640751 |
Method for the purification of gases containing mercury and simultaneous recovery of the mercury |
February 3, 1987 |
| A method for the purification of gases containing mercury and simultaneous recovery of the mercury in metallic form by a process where primarily a reaction takes place between metallic vapory mercury and mercury (II)-chloride compounds in solution in a liquid phase, during which the |
| 4629704 |
Method for assaying sulphur trioxide |
December 16, 1986 |
| A method for assaying dry gases comprising sulphur trioxide capable of forming a mist. The gas to be assayed is introduced into a closed space and contacted therein with air comprising normal humidity which reacts with the gas to form a mist, whereafter the light-extinction properties of |
| 4626279 |
Method for processing copper smelting materials and the like containing high percentages of arse |
December 2, 1986 |
| The invention relates to a method for preparing a sulphidic concentrate which is intended for further processing to copper and/or precious metals and which contains high percentages of arsenic and/or antimony, and possibly also bismuth in quantities likely to disturb subsequent proce |
| 4613365 |
Method for recovering precious metals |
September 23, 1986 |
| The invention relates to a method for pyrometallurgically recovering the precious metal content, such as gold, silver and platinum metals, of halogen-bearing materials rich in silver. The material is caused to rapidly disperse in or be finely distributed throughout an at least partia |
| 4612171 |
Method for recovering metal values from materials containing copper and/or precious metals |
September 16, 1986 |
| The invention relates to an improvement in a method for recovering metal values from copper-containing and/or precious-metal containing materials which also contain antimony and/or bismuth in such high quantities as to render working-up of the materials with conventional metallurgical |
| 4608083 |
Method for recovering the valuable metal content of contaminated copper raw material |
August 26, 1986 |
| The invention relates to a method for recovering the valuable metal content of a mix of contaminated copper raw materials, of which materials at least one is sulphide bearing, and which contain one or more impurities forming the group arsenic, antimony, bismuth, mercury, tin, chlorine an |
| 4605544 |
Method for producing selenium salts |
August 12, 1986 |
| Method for producing alkali metal selenite and alkali metal selenate from metallic selenium through selenous acid. The selenium is dissolved in nitric acid to form silenous acid, which is reacted with an alkali metal base to from alkali metal selenite. The formed selenite is then spray |
| 4587847 |
Method for indicating concealed deposits |
May 13, 1986 |
| The invention relates to a method for indicating the presence of concealed minerals and/or deposits in prospecting or exploration operations. A flow of ascending free geogas is analyzed with respect to its content of entrained substances of exploration interest. The gas is suitably sampl |
| 4585477 |
Method for separating and recovering nickel and copper from complex materials |
April 29, 1986 |
| A method of recovering copper and nickel from sulphidic minerals containing copper, nickel and iron comprises the steps of roasting the mineral, preferably to provide magnetite; sulphating, for example with sulphuric acid, sulphur trioxide, metal sulphate and/or sulphur dioxide together |
| 4584017 |
Method for producing metallic lead by direct lead-smelting |
April 22, 1986 |
| The invention relates to a method for producing metallic lead from lead-containing starting materials by an oxidizing smelting process and subsequent reduction of the resultant oxidic molten bath. The reduction is effected with solid carbonaceous reduction agent present in the melt, and |
| 4572707 |
Method in the excavation of underground caverns in rock |
February 25, 1986 |
| The present invention relates to a method in the excavation of rock caverns, substantially cylindrical vertical caverns, for storing liquids or dry products, or for use in storing process units, in which method an upper and a lower circumferentially extending cavern (4, 11) is formed, |
| 4571261 |
Method for recovering lead from waste lead products |
February 18, 1986 |
| The invention relates to a method for recovering lead and lead-alloying elements from battery-type lead waste products, and fractions thereof, such as battery mud, and similar oxidic-sulphatic materials.In accordance with the method, the waste products, together with a solid reduction ag |
| 4571260 |
Method for recovering the metal values from materials containing tin and/or zinc |
February 18, 1986 |
| The invention relates to a method for recovering the metal values from materials containing at least one of zinc and tin, by smelting the starting materials under oxidizing conditions and reducing the resultant molten bath. The starting materials are first smelted in a furnace while |
| 4566975 |
Method for purifying aqueous solutions |
January 28, 1986 |
| The invention relates to a method for purifying aqueous solutions containing at least one impurity element from the group consisting of arsenic, phosphorus, mercury and other heavy metals and solid matter by precipitation in at least two stages with the aid of precipitation reagents |
| 4560540 |
Method for recovering useful products from waste products obtained when manufacturing aluminium |
December 24, 1985 |
| The invention relates to a method for recovering useable products from waste products deriving from the manufacture of aluminium fluoride on the basis of aluminium hydroxide and fluosilicic acid. Mother liquors and washing water from a scrubber in said process, which solutions contain |
| 4559220 |
Crystallization of polyaluminium hydroxide complexes |
December 17, 1985 |
| The present invention relates to a method for producing a polyaluminium hydroxide complex of a chloride and sulphate type in solid form, an aqueous solution of the polyaluminium hydroxide complex being admixed with at least one water-miscible organic solvent having 1-4 C, the weight rati |
| 4557918 |
Method for producing silica |
December 10, 1985 |
| The present invention relates to a method for purifying silica waste obtained in the manufacture of aluminium fluoride from hexafluosilicic acid and aluminium hydroxide, whereby the silica, is subjected to an acidic leaching at a pH below 3 to leach out part of the fluorine and subst |
| 4556525 |
Method for producing granulate sodium tripolyphosphate of low bulk density |
December 3, 1985 |
| The present invention relates to a method for producing lightweight granules of sodium tripolyphosphate from a powderous sodium-phosphate mixture. The material is first processed in the schugi-mixer, while adding a given quantity of water thereto, whereafter the moist mixture is fed to |
| 4555942 |
Method for continually controlling the quality of cathode copper |
December 3, 1985 |
| The invention relates to a method for controlling or monitoring the quality of copper cathodes. The method is characterized by stacking cathodes to form a bundle, preferably comprising 10-20 cathodes, and by determining the bulk density, or a value related thereto, of the bundle. The bul |
| 4544095 |
Method for atomization and device for carrying out the method |
October 1, 1985 |
| Liquid fuel, particularly slurry-type fuel, such as coal-water, slurry or coal-oil slurries, is atomized by bringing the fuel into contact with gas under pressure in an atomizing nozzle (1). To this end, a continuous stream of fuel is passed through a channel (17) of circular cross-secti |
| 4536384 |
Stable solutions of basic aluminium sulphate containing polynucleate aluminium hydroxide sulphat |
August 20, 1985 |
| The present invention relates to storage-stable solutions of basic aluminium sulphate containing polynucleate aluminium hydroxide sulphate complexes of the formulain which x is 0.75-2.0; y is 0.5-1.12; 2x+y=3; and z is >>4, which solutions contain a stabilizing agent in the form of |
| 4529444 |
Method for separating solutions |
July 16, 1985 |
| The invention relates to a method for continuously separating a hypoeutectic solution into two parts, of which parts, one comprises practically pure solvent and the other a solution which has a higher content of the dissolved substance than the original solution. In accordance with t |
| 4520003 |
Method of manufacturing sulphur-trioxide for the production of sulphuric acid |
May 28, 1985 |
| A method for manufacturing sulphur-trioxide for the production of sulphuric acid from sulphur-dioxide containing gas, particularly furnace gas obtained from metallurgical processes by oxidation to sulphur trioxide in the presence of a catalyst and conversion of the sulphur trioxide to |
| 4515631 |
Method for producing blister copper |
May 7, 1985 |
| The invention relates to a method for producing blister copper from copper-iron sulphide concentrates, and particularly from concentrates whose sulphur content is insufficient to effect autogenous smelting of the concentrates to matte. The invention is characterized in that the conce |
| 4514217 |
Method of producing lead from sulphidic lead raw-material |
April 30, 1985 |
| The invention relates to a method for producing lead from sulphidic lead raw-materials by direct smelting processes of the kind in which the lead raw-materials are smelted autogenously in a shaft with the aid of oxygen gas, or air enriched in oxygen, optionally by adding fluxes, there be |
| 4512803 |
Process for recovering lead from lead chloride containing raw material |
April 23, 1985 |
| The invention relates to a method for recovering lead from lead chloride raw materials, by reducing the lead chloride with gas in a reaction zone comprising one or more separate reaction chambers. The invention is characterized in that two reduction processes are carried out simultan |
| 4512798 |
Method for producing lead from sulphidic and oxidic and/or sulphatic lead raw materials |
April 23, 1985 |
| The invention relates to a method for producing lead from moist lead-sulphide concentrates and oxidic and/or sulphatic lead raw materials by the known roasting and reaction process. According to the method granules or pellets of oxidic and/or sulphatic lead raw materials are brought |
| 4508565 |
Method for producing lead from oxidic lead raw materials which contain sulphur |
April 2, 1985 |
| The invention relates to a method for producing lead having a sulphur content beneath about 2%, from sulphur-containing oxidic lead raw materials contaminated with zinc and/or other readily oxidized elements, by smelting the materials in a furnace in which the furnace contents can be |
| 4503017 |
Method of purifying waste aqueous solutions from heavy metals |
March 5, 1985 |
| A process for purifying an acid aqueous solution containing heavy metals by adding sulfide ions to said acid aqueous solution at a first pH lower than 3.4, precipitating a first heavy metal, adding sulfide ions again to said first precipitate containing acid aqueous solution, after adjus |
| 4492924 |
Method and apparatus for ore prospecting utilizing an aerial transmitter and aerial receiver |
January 8, 1985 |
| The present invention relates to a method and apparatus for determining the electrical conductivity of the ground, particularly in connection with aerial prospecting, with the use of a transmitter unit (S) and a receiver unit (M) located at a distance from said transmitter unit and parti |
| 4489046 |
Method for working-up arsenic-containing waste |
December 18, 1984 |
| A method is disclosed for converting an arsenic-containing waste product to a depositable, substantially arsenic-free form by fuming-off the arsenic content thereof. The method comprises melting the waste product under oxidizing conditions in a furnace to form an oxidic slag melt; causin |
| 4474506 |
Method for constructing in rock storage locations for liquid products, for example oil products |
October 2, 1984 |
| Method for constructing a liquid-product storage location in rock formations, said location comprising a first cavity, and a plurality of second cavities located outside the first cavity. In accordance with this method there is first formed a tunnel (7) which slopes from the surface of |
| 4468558 |
Method and apparatus for measuring radon beneath and above the level of the ground |
August 28, 1984 |
| The invention relates to a method and apparatus for measuring at least one of the parameters flow rate, flow velocity, concentration and quantity of radon and/or radon daughters in the ground. The method is characterized by collecting gas arriving from the ground in a first chamber which |
| 4460376 |
Method of recovering high-grade fuel from solid mineral-fuel raw material |
July 17, 1984 |
| A method of recovering high-grade, preferably sulphur-free fuel from a bituminous or pyrobituminous mineral-fuel material, such as coal, oil shale and alum shale, wherein the raw material is finely divided into a sufficiently fine particle size for freeing the major part of bituminous |
| 4447963 |
Method for producing a fuel from solid bituminous and/or lignocellulosic material |
May 15, 1984 |
| The invention relates to a method for producing fuel from solid bituminous or lignocellulosic material. The material is charged, optionally continuously, to a closed vessel together with oil heated to a temperature in excess of 65.degree. C., preferably in excess of 75.degree. C. A total |
