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Method for measuring high furnace burden face appearance and material flow track using laser ranging technique

InactiveCN101256069AMeasurement has little effectAccurate and Practical Measurement MethodsUsing optical meansLaser rangingLaser scanning
The invention relates to a method for measuring blast burden shape and burden flow trajectory with the laser range-finding technique, which mainly includes the following steps: fetching the point group data in the blast furnace by the laser scanner equipped on the upper part of the blast burden with laser scanning method, rebuilding a three-dimensional model from the point group data by computer, achieving the measurement of blast burden shape, measuring the burden flow trajectory by the two-dimensional laser scanner equipped above the blast burden to form a blanking curve down from the hopper, and integrating the curve with the three-dimensional model by computer, for operators to confirm whether the blanking position is in accordance with the original set position, and according to the result verifying the burden distribution angle and burden turns number. The invention mainly uses the characters that the laser scanner is rapid, stable and accurate and the measurement is not affected by the blast furnace environment, coordinated with the computer process, which can be applied in blast burden investigation of the burden surface after burden distribution and the burden flow trajectory, in order to provide an accurate and practical measure method.
Owner:CHINA STEEL

Chromium-manganese-nitrogen austenitic stainless steel

The invention relates to Cr-Mn-N austenite stainless steel. A proper amount of Mn and N are used to substitute expensive nickel to produce a novel Cr-Mn-N steel grade for reducing the cost for materials and maintaining the prior physical property and mechanical property. The Cr-Mn-N austenite stainless steel comprises the following composing elements in percentage by weight: 0.005 to 0.08 percent of carbon element, 0.3 to 0.9 percent of silicon element, 12.1 to 14.8 percent of manganese element, 0.001 to 0.04 percent of phosphorus element, 0.001 to 0.03 percent of sulfur element, 16 to 19 percent of chromium element, 0.5 to 1.8 percent of nickel element, 0.2 to 0.45 percent of nitrogen element, 0.001 to 0.3 percent of molybdenum element, 0.001 to 0.3 percent of copper element, and unavoidable trace elements during most manufacturing processes. The corrosion resistance, the strength and the elongation percentage of the Cr-Mn-N austenite stainless steel in marine atmosphere and acid atmosphere are the same as those of a 304 stainless steel material or are better than those of the 304 stainless steel material, and the Cr-Mn-N austenite stainless steel can reduce the cost for the materials. The Cr-Mn-N austenite stainless steel has the advantages of high elongation percentage, strong corrosion resistance, excellent casting formability and good high-temperature oxidation resistance.
Owner:ADVANCED INT MULTITECH CO LTD

Foam concrete composite heat preservation wall body with concrete blocks and construction method thereof

The invention provides a foam concrete composite heat preservation wall body with concrete blocks, belonging to the field of building energy conservation. The foam concrete composite heat preservation wall body is used for buildings, such as dwellings, workshops, hotels and the like, and is particularly suitable for new rural reconstruction. The wall body provided by the invention is prepared by constructing different combinations of five concrete precast blocks with different shapes with cement mortar. According to a quantity of floors, the wall body is reinforced, and a wall post and a ring beam can be borne by using wall body reinforcing ribs with different quantities, different manners and different specifications. Ordinary concrete is cast at positions of posts and beams in the hollow wall body, and foam concrete with a concentration of 200-400 kg/m<3> is cast at the other positions, so as to form the heat preservation and sound insulation wall body, and carry out mortar plastering and decoration. When the wall body provided by the invention is more than or equal to 250 mm thick, an average volume weight of the wall body is less than or equal to 600 kg/m<3>, a heat conduction coefficient is less than or equal to 0.4 W/(m2.K), and a pressure-resistant strength of a wall surface is more than or equal to 20 MPa. The wall body provided by the invention has the advantages of convenience and rapidness of construction. Furthermore, the wall body is firm, durable, mild, environment-friendly and safe.
Owner:洛阳原生建筑工程技术有限公司
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