Abstract: The invention relates to a method for quantitative analysis of one or more elements in a molten metal bath. Light from one or more light sources are focused against the surface of the molten bath and is reflected from the surface of the metal bath to a monochromator or a polychromator connected to detectors for detecting absorbed light in a gas layer associated with the melt of a wavelength or wavelengths corresponding to the element or elements to be analyzed. The absorption signals are proportional to the atom- or molecular density of the components to be analyzed and a function of the thickness of the gas layer and the concentration of the element or elements in the molten metal bath. The concentration of the elements to be analyzed is the calculated based or known relations between absorption signal, the thickness of the gas layer and the temperature of the metal bath.

Abstract: The process feeds a mixture of scrap metal, quartzite, carbonaceous material and wood chips to a submerged arc furnace to make a base iron suitable for iron foundry purposes. The mixture contains 1 to 20% quartzite, 5 to 15% carbonaceous material, 0 to 10% wood chips, all based on the weight of scrap in the mixture. By maintaining the charge in the furnace, good efficiencies are obtained.

Abstract: The present invention relates to a silicon powder, which is characterized in that it is produced by gas atomizing of molten silicon and having a particle size between 0,1 and 1000 .mu.m, a specific surface area between 0.001 and 1 m.sup.2 /g, and the following chemical composition in percent by weight:0.1-1% iron, 0.01-1% aluminium, 0-8% copper, 0-1% calcium, 0-1% zinc, 0-1% tin, 0-5% boron, 0-0.5% phosphorus, 0-0.5% sodium, 0-0.5% lithium, 0-0.5% potassium, 0-0.5% magnesium, 0-0.5% strontium, 0-0.5% barium, 0-0.5% beryllium, the rest being silicon and less than 0.3% impurities such as Ti, V, Cr, Mo, W and Zr.

Abstract: The present invention relates to the use of manganomanganic oxide particles containing at least 90% by weight of manganomanganic oxide, said particles having a density of 4.50 to 4.75 g/cm.sup.3 and a particle size of at least 98% below 10 .mu.m, as a weight material for drilling mud fluids and for cement slurries for cementing oil wells.The manganomanganic oxide particles which are used are preferably recovered from off-gases which evolves during refining of ferro-manganese melts.

Abstract: The present invention relates to a dispensing equipment for adding inoculants to the stream of molten iron flowing from the spout of a tilting ladle. The dispensing equipment comprises a hopper (4) for the inoculant which hopper has an outlet opening (5) which extends through the wall of a first pipe 6. Means (9) is arranged for continuously and adjustably transportation of inoculant from the hopper (4) through the first pipe (6) and a second pipe 8 into the spout (1) of the ladle. The second pipe (8) is rotatably connected to the first pipe (6). A mounting frame (18) is suspended from the first pipe (6) by means of at least two bearings (16, 17), which bearings (16, 17) are rotatably arranged about the first pipe (6). The mounting frame (18) is firmly affixed to the second pipe (8), and a mounting arm (21) is fixed to the mounting frame (18), said mounting arm being intended to cooperate with a mounting bracket (3) on the ladle spout (1).

Abstract: The present invention relates to a method and a means for charging liquid slag to a closed smelting furnace. The means for charging liquid slag comprises a double walled tube extending through an opening in the furnace roof, said tube being connected to means for raising and lowering the tube relatively to the furnace roof. Means for gas tight sealing are provided between the furnace roof and the double walled tube. A funnel shaped part is secured to the upper end of the tube, said funnel shaped part being equipped with a closeable lid for gas tight closing of the funnel shaped part. For charging of liquid slag to the furnace the tube is lowered down into the furnace to such an extent that the lower end of the tube is under the slag level in the furnace, whereafter the lid is opened and liquid slag is charged into the furnace. When charging of liquid slag is finished, the lid is closed and the tube is raised to such an extent that the lower end of the tube is above the slag level in the furnace.

Abstract: The present invention relates to a feed device for guiding rope onto a winding drum mounted on a frame 3. The device comprises a first guide pulley 5 which is mounted on the frame 3 between the winding drum 1 and a fixed frame pulley 4, and a second guide pulley 7 which is mounted at the upper end of an arm 6. The arm 6 is pivoted to the frame 3 at its lower end at a point below the first guide pulley 5.

Abstract: The publication relates to means for cooling a body, comprising at least a tube through which a liquid coolant is flowing in order to remove heat away from the at least one tube and its surroundings. The tube(s) houses an internally arranged hose having a wall thickness, permeability and/or porousity and a quality which corresponds to the heat energy to be removed from the tube(s) and/or it surroundings. The hose has preferably an outer diameter which corresponds substantially to the internal diameter of the tube(s) and the hose is formed of a texture of a flexible material such as for example textile or fiberglass. The hose may be fastened to the tube at its inlet end.

Abstract: A cement slurry of low specific density for cementation of oil-and gas wells is produced by mixing oil-well cement with finely divided emission products comprising amorphous silica dust which has been obtained during the electrothermal preparation of ferrosilicon and/or silicon metal, water, and any desirable dispersion components, the emission products being added in an amount in the range of 1-50% of the total weight of dry material. The emission products can either be mixed with the cement while both components are in the dry state whereupon there is added a sufficient quantity of water in order to obtain a desired specific weight of the slurry or first mixed with water and any other desired dispersion components and this slurry is mixed with the oil-well cement.

Abstract: The present invention relates to a pin tumbler cylinder lock comprising an outer cylinder, an inner cylinder rotatably arranged in a cylindrical opening in the outer cylinder, a key-way intended for a key and at least two rows of parallel bores arranged in the outer cylinder, in which bores spring loaded tumbler pins are slidably arranged. The at least two rows of bores have different number of bores, whereby the key will be prevented from retraction in one or more angular position of the inner cylinder. The present invention relates further to a key for such type of locks, the key having notches along its edge, the depth of which being interrelated with the length of the bottom tumbler pins. At least the notch at the extreme end of the key is removed, whereby the key may be retracted in both positions.

Abstract: The present invention relates to means for transporting/rotating the pot of a smelting furnace. The invention is particularly adapted to furnaces having rotating furnace pots and in particular to furnaces with a split furnace body. The pot is locked from rotation simply by letting the furnace pot rest on its foundation during intervals in which the pot is supposed to be at rest. The pot is rotatably arranged with respect to the furnace foundation and the rotation is produced by means of a plurality of transport means. The transport means are preferably evenly arranged around the circumference of the pot. The transport means comprises lifting means which periodically lift the pot partly or completely off its foundation. The lifting means are preferably of a type which provide a lifting force in vertical direction, either by means of a hydraulic medium or compressed air. The lifting means may for example be formed by one or more flexible hoses which communicates with a pressure producing source.

Abstract: The present invention relates to an anti-skid device for improving the traction of a wheel on an automotive vehicle on the ground. The invention relates also to a method of producing such anti-skid devices. The anti-skid device comprises at least one chain intended to run along the wall(s) of the tire and a plurality of chains intended to surround the entire tread face of the tire. The various chains are interconnected. The interconnection is provided by welding a certain number of neighboring links of two adjacent chain lengths together. The chain length may preferably be equipped with additional gripping elements welded on at least some of the links.

Abstract: The drum of a hoisting apparatus is axially shifted to frictionally engage a driving plate. The drum is shifted by rotating an adjacent, first disc about the drum axis relative to a coaxial stationary disc. Each of the discs has three holes of a particular configuration to define three cooperative pairs of holes. Each cooperative pair of holes receives a dowel of predetermined length so that rotation of the first disc causes the dowel to react against the discs and shift the first disc and drum away from the stationary disc and into frictional driving engagement with the driving plate.

Abstract: A method of detecting flaws in metal members is disclosed. The metal member is exposed to high frequency heating whereupon the temperature profile across the work piece is measured, preferably by recording with an infrared camera. The recorded data can be used for automatic marking or repair of the metal member.