摘要:
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. and the ratio of the volume of the gas generated per minute by the substances supplied through the tuyere for bottom blowing to the combined weight of the molten metal and the molten slag falls in the range of 100 to 2,500 [Nl/min.t] and the second 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., the ratio of the volume of gas generated per minute by the substances supplied through the tuyere for bottom blowing to the combined weight of the molten metal and the molten slag falls in the range of 100 to 1,800 [Nl/min.t].
摘要:
There is provided a process for producing a high-manganese iron alloy from a manganese ore and/or a pre-reduced product thereof in a top and bottom blown converter type reaction vessel holding molten iron or a molten manganese iron alloy, together with a molten slag, said molten iron or alloy and said molten slag being the products of a separate smelting furnace, gas being blown into said vessel through a bottom blowing nozzle, said process comprising charging said vessel with a supply of raw materials including at least one source of manganese and iron selected from a manganese ore containing manganese oxide and iron oxide and a pre-reduced product thereof, a solid carbonaceous substance and a slag forming agent, while simultaneously blowing gas selected from oxygen and a gas containing oxygen into said vessel through a top blowing lance to burn said carbonaceous substance so as to heat, melt and reduce said raw materials to form a melt containing manganese oxide and iron oxide; supplying an additional carbonaceous substance into said melt to reduce said manganese oxide and said iron oxide to form a molten high-manganese iron alloy and a molten slag, discontinuing said blowing of gas through said top blowing lance, and removing said molten high-manganese iron alloy and said molten slag from said vessel, said molten alloy being used for casting.
摘要:
A process for producing high chromium steel is disclosed which comprises supplying molten iron in a smelting furnace with a solid chromium source, carbonaceous powder and oxygen-containing gas in amounts so controlled as to keep the melt at a temperature in the range of less than 1650.degree. C. and above the minimum melt temperature at the specific carbon and chromium levels in the melt and which is capable of performing preferential decarbonization while inhibiting the oxidation of chromium.
摘要:
The present invention relates to a composition for a thermosetting silicone resin including: a dual-end silanol type silicone oil; an alkenyl-containing silicon compound; an organohydrogensiloxane; a condensation catalyst; and a hydrosilylation catalyst, in which the condensation catalyst includes a tin complex compound.
摘要:
A thermoplastic silicone resin has a main chain consisting of a polysiloxane and at least two side chains which branch off from the main chain. The side chain contains a functional group having two or more atomic groups each capable of forming a hydrogen bonding.
摘要:
The present invention relates to a composition for a silicone resin, including: (1) an organopolysiloxane having a silanol group at an end thereof; (2) an organopolysiloxane having at least one alkenylsilyl group and at least two hydrosilyl groups in one molecule thereof; (3) a condensation catalyst; and (4) a hydrosilylation catalyst.
摘要:
A wet solar cell module includes two or more photoelectric conversion devices spaced from each other and sandwiched between a first insulating substrate and a second insulating substrate. The photoelectric conversion device includes a first electrode, a photoelectric conversion portion, and a second electrode that are stacked in this order on the first insulating substrate. One of the first electrode and the second electrode included in the photoelectric conversion device has a through portion. Between respective photoelectric conversion portions of two photoelectric conversion devices adjacent to each other, an inter-cell insulating portion extends through the through portion. In a space surrounded by the first insulating substrate, the second insulating substrate, and the inter-cell insulating portion, a carrier transporter is provided.
摘要:
The present invention relates to a zero-valent transition metal complex which can be used as a starting material for producing a catalyst usable for producing a polyolefin by ring-opening metathesis polymerization of an olefin and an epothilone by ring-closing metathesis reaction, and a method for efficiently producing, at low cost, an organometallic compound useful as a catalyst, using the zero-valent transition metal complex as a starting material. Provided is a method for producing a zero-valent transition metal complex (C), which comprises reacting a divalent transition metal complex (A) with an olefin (B), the complex (A) being selected from the group consisting of a divalent ruthenium complex (A1) and a divalent osmium complex (A2), thereby obtaining a zero-valent transition metal complex (C), wherein the reaction is conducted under reducing conditions and after the reaction, the resultant crude product is extracted at high temperature using a saturated hydrocarbon as an extracting solvent. Also provided is a method for producing an organometallic compound, which comprises reacting the metal complex (C) with a specific compound (D) and a neutral ligand (E) in one step.
摘要:
A method for synthesizing an organometallic compound, which is usefully utilized as a catalyst for manufacturing polyolefins by ring-opening metathesis polymerization of an olefin having strain in a molecule such as dicyclopentadiene or synthesizing epothilones by ring-dosing metathesis reaction, by an efficient and low cost synthesis method using a starting material which is easily available due to relatively simple chemical structure, and further without any possibility of coexistence of a vinylhetero compound or a vinyl compound exchanged which tends to accompany as an impurity in the system in conventional methods, characterized by reacting a starting material comprising a zero-valent transition metal complex (A) or a polyvalent transition metal complex (A′), a compound (B) or (B′) shown by the following general formula (1) or (4), respectively, and a neutral ligand (C) or (C′), in one step under non-reducing condition or reducing condition. R1Y1CR2X12 (1) R4Y2CR5X22 (4)
摘要:
The present magnetic recording and reproducing device is provided with a magnetic head (5), which, during recording, applies an external magnetic field to a recording medium (6) having a recording layer made of a ferrimagnetic material, and with a laser light source, which increases the temperature of the recording medium (6) in domains (Tr1 and Tr2) which are opposite the magnetic head (5), but exclude a track to be recorded (Tr), which is a domain for recording. Consequently, a magnetic recording and reproducing device can be provided which is capable of suppressing crosstalk and realizing higher recording density than conventionally.