The invention discloses a method for quickly testing the appropriate granulation moisture content of an iron ore sinter mixture The appropriate granulation moisture content refers to the moisture content required by the granulated mixture for obtaining optimal breathability The moisture includes the moisture of the raw materials and the added water during mixing and granulation The method comprises the following steps: 1) preparing a slurry mixture of which the humidity is 10 to 20 percent from iron ore, solvent, coke powder and sinter return ore; 2) rinsing and sieving the mixture by using saturated lime water as a medium, obtaining adhesive powder and shell grains and testing the content Xa of the adhesive powder; 3) testing the inner hole water-holding capacity of the shell grains by centrifugation; 4) testing the saturated water-holding capacity of the adhesive poser by using saturated water absorption process; and 5) calculating the appropriate moisture content required for the granulation of the mixture according to a formula The method has the characteristics of simple operation and high accuracy Based on an absolute error range from -03 to +03, the accuracy of the prediction of the appropriate moisture content reaches 933 percent according to the results of the tests of the moisture content of mixtures prepared by 30 material mixing schemes

Method for quickly testing appropriate granulation moisture content of iron ore sinter mixture

The invention discloses a method of producing titanium-bearing metallic pellets used for protecting a blast furnace with a rotary hearth furnace through direct reduction The method comprises the steps of adding gas ash containing 5%-40% of carbon to titanium-bearing concentrate powder according to the proportion of 1-12 of carbon to oxygen atoms iron oxides in a mixture, adding 1%-3% of compound binder, and conducting compounding, humidifying, mixing, double-roll pellet pressing, baking and high-temperature reducing at 1000-1350 DEG C in the rotary hearth furnace, thereby producing the titanium-bearing metallic pellets serving as high-quality furnace protecting materials for the blast furnace The producing method takes full advantage of the carbon in gravity ash and cloth bag ash of the blast furnace as a reducing agent; the adverse effects brought by cycle enrichment of harmful elements such as potassium, sodium and zinc in the blast furnace ironmaking process are eliminated; the cost-effective titanium-bearing metallic pellets used for protecting the blast furnace are obtained

Method of producing titanium-bearing metallic pellets used for protecting blast furnace with rotary hearth furnace through direct reduction

The invention relates to a device for using high-temperature converter gas and increasing the heat value. The device comprises a movable flue gas hood, a fixed flue, a carbon loss reactor, a water-cooling elbow and a dust removal tank; the movable flue gas hood is arranged above a converter; one end of the fixed flue is connected with the movable flue gas hood; the other end of the fixed flue is connected with the carbon loss reactor; the lower end of the carbon loss reactor is connected with the water-cooling elbow; the dust removal tank is arranged below the water-cooling elbow; a flue gas analysis meter is arranged at the tail of the water-cooling elbow; the carbon loss reactor is filled with one or more of coke, machine-pressed charcoal and semi-coke with the lumpiness not lower than 10 mm; and valves are mounted at the upper end and the lower end of the carbon loss reactor. A method is simple and easy to implement, the carbon loss reactor, is arranged on the basis of an original gasification cooling pipeline, the temperature of the high-temperature converter gas is reduced from 1,500-1,600 DEG C to 800-950 DEG C by the aid of the carbon loss reaction absorbing a large quantityof heat, meanwhile, CO is enriched, the content of CO in the converter gas is increased from 50%-70% to more than 80%, and subsequent application is facilitated.

Device for using high-temperature converter gas and increasing heat value and use method of device

The invention discloses a high-vanadium and high-chromium type vanadium titano-magnetite pellet, and belongs to the technical field of blast furnace smelting in a high-vanadium and high-chromium type vanadium titano-magnetite comprehensive utilization method. The high-vanadium and high-chromium type vanadium titano-magnetite pellet comprises, by mass percentage, 0.45-0.62% of V2O5, 2.29-3.20% of TiO2, 0.22-0.48% of Cr2O3, 61.88-64.22% of TFe, 0.11-0.63% of CaO, 3.18-4.77% of SiO2, 0.32-0.89% of MgO, 1.62-4.0% of Al2O3, and the balance inevitable impurities, wherein in the TFe, Fe2O3 accounts for 87.51-91.41% of the mass percentage of the pellet, and FeO accounts for 0.3-0.8% of the mass percentage of the pellet. The high-vanadium and high-chromium type vanadium titano-magnetite pellet has the advantaged that in the raw material proportion for preparing the pellet, the proportion of bentonite is decreased by more than 1%, and therefore the grade of the pellet can be improved; and the quality of the fresh pellet can be practically and effectively improved, and the yield and the quality of the pellet can be ensured.

High-vanadium and high-chromium type vanadium-titanium magnetite pellet

The invention discloses an interference-free weighing device applied to a specific temperature and humidity environment. The device comprises a water bath containing water, and a sealed tank containing a saturated salt solution, wherein a box cover is arranged on the water bath; a sealing cover is arranged on the sealed tank; a hole is formed in the box cover; the sealing cover covers the sealed tank and is exposed out of the water bath by virtue of the hole in the box cover; a test piece is arranged in a sample carrying basket, a hanging rod is inserted into the sealing cover, the lower end of the hanging rod hooks the sample carrying basket, the sample carrying basket is arranged in the sealed tank, and the sealed tank is arranged in the water bath; a guide rail rack is erected above the water bath; and an electronic scale is arranged on the guide rail rack. According to the interference-free weighing device applied to the specific temperature and humidity environment disclosed by the invention, the sample can be repeatedly weighed under the condition that the sealed tank is not opened, and disturbance of water vapor in the sealed tank is avoided, so that the sample is always positioned in the specific temperature and humidity environment.

Interference-free weighing device applied to specific temperature and humidity environment

The invention discloses a device and a method for determining the moisture content and the size composition of a sinter mixture. The device consists of a size heating chamber, a moisture heating chamber, a balance, a boss, a hanging basket, a heating member, and a temperature controller. The method comprises the following steps: putting two parts of equivalent sinter mixture samples into the sizeheating chamber and the moisture heating chamber having the same temperature respectively; acquiring the weight loss rates at each time in real time by an acquisition program; determining the end time of the moisture evaporation of the mixture and the time point for detecting the size composition of the mixture; computing and screening the mixtures respectively to obtain the moisture content and the size composition of the mixtures. The device and the method have the advantages that: by determining the end time of the moisture evaporation according to the weight loss rate, the heating time can be adjusted according to the characteristics of different materials per se so as to obtain accurate and reliable moisture content of the mixtures having strong contrastive property; and by determining the time point for detecting the size composition of the different materials according to the weight loss rate, the original size of mixtures can be maintained without blocking screens due to excessive humidity so as to obtain real size composition of the sinter mixture.

Device and method for determining moisture content and size composition of sinter mixture

The invention relates to a system and a method thereof for carrying out real-time online calculation on a titanium balance of a blast furnace, belonging to the technical field of metallurgical ironmaking The system comprises a terminal acquisition calculating industrial personnel computer and a field data management operating computer communicated with the terminal acquisition calculating industrial personnel computer, and system software loaded on the management operating computer comprises a data acquisition module, a titanium balance calculation module and a titanium balance online detection module Automatic online acquisition and balance acquisition of various data are carried out by using in-furnace material gravity, out-furnace material weight and titanium contents of various materials through the computer programming; data of titanium received quantity, titanium expanded quantity, received and expanded balance quantity, titanium load, titanium yield, and the like every day are continuously displayed on a user interface, and the titanium balance of the blast furnace can be calculated on line in real time The invention is suitable for various blast furnaces, saves manual complicated number recording and calculating processes because the calculating accuracy of the computer program is high and the acquisition of various data are fully automatic, is flexible and convenient because parameters and results are stored in a form of database, and provides accurate basis for a blast furnace operator to hold the received and expanded condition of titanium in the blast furnace in real time

System and method thereof for carrying out real-time online calculation on titanium balance of blast furnace

The invention discloses a control method for pellet material blending, belonging to the technical field of pellets. The control method for pellet material blending comprises the following steps: reading chemical components and prices of iron ore, bentonite, solvents, collected dust and coal dust, and optionally predicting the cost or optimizing material blending calculation. By adopting the control method for pellet material blending, the components of pellet ore, the consumption amounts of various raw materials, and the raw material cost, can be obtained, various raw material proportions which meet all constraint conditions can be obtained, and moreover the lowest raw material cost of the pellet ore can be achieved according to the proportions.

Control method for pellet material blending

A blast furnace gas enrichment apparatus and a method belong to the technical field of blast furnace gas. The apparatus comprise a feeder, a coal briquette preheater, a distributor, a heat exchanger, a gas-heating furnace, a gas bustle pipe, gas spray guns, a shunt, an ash tray, a gas enrichment furnace, a deduster, a gas storage tank, an oxygen pipeline and a gas outlet pipeline. Blast furnace gas is adopted as material, gas is adopted as energy, oxygen is adopted as oxidizer, and non-coking coal, nut coke and the like are adopted as reducers; after nitrogen is removed from the blast furnacegas and the blast furnace gas passes through a preheater and is enriched, the gas carries out heat exchange, and enters a gas heater, the gas heater utilizes the high-heat value gas to burn with oxygen to provide heat for the blast furnace gas, so that the temperature of the blast furnace gas reaches 800 DEG C to 900 DEG C, the blast furnace gas is blown into the furnace from around the furnace wall, coal briquettes are packed in the gas enrichment furnace, the main reduction task is fulfilled in the coal briquette-packed bed, and thereby high-heat value gas is produced. The invention has theadvantages that: the heat value of the blast furnace gas is increased, and the emission of carbon dioxide is reduced.

Blast furnace gas enrichment apparatus and method

The invention provides a measuring error calibration method. The method comprises the following steps: arranging a slag sample and heating the slag sample; when the temperature of the slag sample is 1500-1540 DEG C, cooling the slag sample, and measuring a viscosity value and a temperature value of the slag sample during cooling; generating a to-be-calibrated viscosity curve according to the viscosity value and the temperature value; comparing the to-be-calibrated viscosity curve with a standard viscosity curve, and calculating a measuring error; wherein the slag sample comprises 30-50 weight percent of CaO, 30-50 weight percent of SiO2, 3-13 weight percent of MgO and 5-20 weight percent of Al2O3. In this way, a temperature measuring error generated due to high temperature bending of a thermocouple hot end under high temperature, a temperature error resulted from temperature field change caused by silicon molybdenum bar oxidation, a sample putting height error generated by graphite base oxidation, system errors generated by viscometer rotor and rotating rod replacement, and the like are eliminated, so that an experimental result is more accurate and reliable, and the experiment accuracy is ensured.

Zhang Dianwei

Papers

Device and method for determining moisture content and size composition of sinter mixture

System and method thereof for carrying out real-time online calculation on titanium balance of blast furnace

Control method for pellet material blending

Blast furnace gas enrichment apparatus and method

Measuring error calibration method