Abstract: A mounting structure for a chemical injection tube for geothermal wells utilized for power generation from geothermal energy. A chemical injection tube is extended into a geothermal well, having an upper end fastened by a sealing flange and a lower end extending down below the flashing point in the well, wherein scale inhibiting chemicals can be supplied from the ground and injected through the tube directly to the geothermal fluid in the well. Thus, the chemical injection tube facilitates the prevention of carbonate scale deposition in the well and results in a stable power plant operation.

Abstract: A process for electrolytically producing a metallic oxide for a ferrite comprising the steps of electrolyzing an inorganic ammonium salt solution of 2-20% containing 0.01-5% of fluoride compound as an electrode with metals or mixture of metals necessary for producing the ferrite as an anode and graphite as a cathode to produce the hydroxide of the metal used as the anode, oxidizing and separating the hydroxide, and then drying and calcining the hydroxide. Thus, a low silica metal oxide of uniform composition is produced by mixing the composition of a ferrite to be produced with iron and/or manganese or iron and/or manganese in case of producing the metal oxide for the ferrite, and electrolyzing various metal with the resultant mixture as an anode.

Abstract: A method of providing a conductor pipe to an opening portion of a well such as an oil well, gas well, geothermal power well or the like. A bore is formed in the ground with a casing tube and an auger screw, inserted into the casing tube, to a predetermined depth, after which the auger screw is withdrawn from the casing tube. Then, the conductor pipe is inserted and concentrically positioned in the casing tube, placed in the bore, to form an annular space between them, to which space a solidifiable filler is supplied from the bottom portion of the space to the upper portion thereof. The casing tube is thereafter withdrawn from the bore and then the filler is solidified to thereby fix the conductor pipe to the opening portion of the well.

Abstract: Drilling fluid additives are prepared by complexing humic acids and/or lignins, with three compounds of zirconium, nickel and iron. The metal composition of the additives is 1.3 to 2.5% of zirconium, 0.8 to 1.5% of nickel and 0.8 to 1.5% of iron, and is totally 3.0 to 5.5%. Thus, the drilling fluid additives, containing no chromium, can be used in wide temperature range for the drilling of oil, geothermal or gas wells with less gelation even by various contamination and cause no serious environmental pollution.

Abstract: In producing a mixed phosphatic fertilizer, humic acid is mixed with fused phosphate to cause the humic acid to react on alkaline ingredients of the fused phosphate for turning these alkaline ingredients into chelate compounds, so that water-soluble phosphoric acid contents of succeedingly added phosphatic fertilizers such as calcium superphosphate and calcium triple-superphosphate are not reduced or insolubilized by being reacted with such alkaline ingredients. Thus, unlike the prior art, a stabilized predetermined level of water-soluble phosphoric acid contents can be secured in the resultant mixed phosphatic fertilizer along with a predetermined level of citric acid-soluble phosphoric acid contents.

Abstract: A drilling fluid additive comprising a complex compound or complex compounds, at least one compound to be selected out of a group of compounds of titanium, zirconium and hafnium belonging to group IVb of the periodic table and, as desired, at least one lignin ensures, for a long period, significantly improved mud functions even at elevated temperatures under high pressure such as encountered in the depths of the earth.

Abstract: A fuel tank for a hydrogen vehicle in which a plurality of fuel cylinders are disposed and contained in a casing of the fuel tank for containing hydrogen storage alloy, the fuel cylinders are connected to a header mounted integrally with the casing for containing the fuel cylinders, a conduit for supplying engine exhaust gas is connected to the casing for externally heating the fuel cylinders in the casing.

Abstract: A process which enables high-chromium alloy such as ferrochromium heretofore obtained by the use of electricity to be produced less expensively in higher yield of chromium by the smelting reduction using solid carbonaceous material such as coke in the place of electricity.The process of smelting reduction is so performed in the top and bottom blowing converter divided into two stages: the first stage for carrying out the converter operation under continued supply of the raw materials containing pre-reduced chromium oxide (chromium ore) and the second stage for carrying out the converter operation under suspended supply of the raw materials containing the pre-reduced chromium oxide, and the first stage of converter operation is carried out under conditions such that the temperature of the molten metal remains at or below 1,650.degree. C.

Abstract: A process for producing magnetic metallic oxide which comprises the steps of pulverizing at least one member selected from the group consisting of ferro-manganese, ferro-nickel, electrolytic manganese, electrolytic iron and electrolytic zinc, adding to the substance thus pulverized at least one member selected from the group consisting of oxides of Fe, Mn, Ni, Cu, Mg, Zn and Co and salts of Fe, Mn, Ni, Cu, Mg, Zn and Co which become oxides by heating, wet pulverizing and mixing the mixture upon oxidation, thereby producing a slurry, and heating said slurry at 800.degree. to 1450.degree. C. By this process, a magnetic ferrite can be stably and inexpensively synthesized.

Abstract: Ferrite having a uniform degree of oxidation is produced at a higher rate of ferrite forming reaction by pelletizing a mixture of iron oxide and ferromanganese powders and calcining the mixture at a temperature of 900.degree. C. or higher. Zinc oxide, magnesium oxide and/or nickel oxide may be further added to the mixture, as required.

Abstract: In producing a mixed phosphatic fertilizer, humic acid is mixed with fused phosphate to cause the humic acid to react on alkaline ingredients of the fused phosphate for turning these alkaline ingredients into chelate compounds, so that water-soluble phosphoric acid contents of succeedingly added phosphatic fertilizers such as calcium superphosphate and calcium triple-superphosphate are not reduced or insolubilized by being reacted with such alkaline ingredients. Thus, unlike the prior art, a stabilized predetermined level of water-soluble phosphoric acid contents can be secured in the resultant mixed phosphatic fertilizer along with a predetermined level of citric acid-soluble phosphoric acid contents.

Abstract: A method for producing electrolytic manganese dioxide is disclosed, comprising the electrolysis of a slurry of particles of manganese oxides in an aqueous solution of manganese sulfate. The concentration of the particles of manganese oxides is 0.01 to 0.4 grams per liter of the solution.

Abstract: A gas having high CO content evolved at reaction zone in a ferrosilicon-refining electric furnace is burned and deflected to wipe transversely on the top level of the charged raw materials with the aid of air introduced near electrodes through an air pipe. The burning of the gas is so controlled that a content of oxygen in the burned gas is within a range of 12-17% by volume by controlling a volume of the air to be introduced near electrodes as well as a volume of air invading into the furnace through a poking window and a gap between a shell of the furnace and a heat-shielding hood above the furnace. The CO-rich gas which has heretofore been exhausted in vain from the furnace can now be used to preheat the charged raw materials and prevents the furnace from blocking due to formation of crusts at the top level of the charged raw materials. The exhaust gas is now less noxious, has a higher temperature that can be used for driving a turbine of a generator.

Abstract: A gas having high CO content evolved at reaction zone in a ferrosilicon-refining electric furnace is burned and deflected to wipe transversely on the top level of the charged raw materials with the aid of air introduced near electrodes through an air pipe. The burning of the gas is so controlled that a content of oxygen in the burned gas is within a range of 12-17% by volume by controlling a volume of the air to be introduced near electrodes as well as a volume of air invading into the furnace through a poking window and a gap between a shell of the furnace and a heat-shielding hood above the furnace. The CO-rich gas which has heretofore been exhausted in vain from the furnace can now be used to preheat the charged raw materials and prevents the furnace from blocking due to formation of crusts at the top level of the charged raw materials. The exhaust gas is now less noxious, has a higher temperature that can be used for driving a turbine of a generator.

Abstract: A method of treating a plating sludge is disclosed, wherein a plating sludge, whose water content is decreased to not higher than 10% by weight, is mixed with scale, dust, both of which are formed in the alloy steel-making step, a binder and a carbonaceous material, and water is added to the mixture to adjust the water content of the mixture to 7-30% by weight, the mixture is kneaded and then molded into a briquet, and the briquet is subjected to a strength-improving treatment. The resulting briquet can be used as a raw material for ferroalloy. When the briquet is subjected to a reduction smelting to recover a metal, the metal can be used as a raw material for alloy steel.

Abstract: The electrode length in an electric furnace is measured by arranging a wire conductor to depend right above a hollow electrode such that it can be lowered and raised through the hollow electrode. When the wire conductor is lowered through the hollow electrode and brought into contact with the molten process material within the electric furnace, an electric circuit constituted by the wire conductor, the process material and a power supply is closed so as to determine the electrode length extending below an electrode holder from a certain relation between the distance of descent of the wire conductor as indicated by a measuring means in accordance with current caused in the electric circuit upon closure thereof and a previously measured distance between the initial position of the end of the wire conductor before the descent thereof and the position of the electric holder.

Abstract: A method of treating waste produced during stainless steel making is disclosed. The method comprises the steps of kneading a sludge cake with a mixture of dust and scale to obtain a kneaded mass, adding an organic binder and eventually adding water with an inorganic binder to said kneaded mass, shaping said kneaded mass into a briquette, and heating said briquette at a low temperature. The briquette obtained can be used as a ferroalloy making raw material.Metal oxides contained in the briquette are reduced by a dry reduction refining added with a carbonaceous reducing agent and eventually with a flux to separate usable metals.

Abstract: An ion exchanger consisting of crushed lignite or brown coal retaining alkali ions, which is obtained by immersing the particles in a dilute caustic alkali solution. The concentration of the caustic alkali ranges from 2 to 20 weight percent, preferably from 3 to 10 weight percent. Following the treatment with the alkali, the system is washed with an acid with a pH of 3 to 7 to remove the alkali liquid. The resultant lignite has less than 4 meq/g, for instance 2.60 to 3.50 meq/g, of sodium ions and exhibits abilities of ion exchange. By treating the alkali treated lignite with hydrochloric acid or sulfuric acid it is possible to retain hydrogen ions, and by using a solution of a calcium salt such as calcium chloride calcium ions can be retained. Thus, calcium ions or potassium ions may be exchanged with cations of a salt of metal of Group second in the periodic table such as calcium, magnesium, barium and zinc.