42results about How to "Good for going straight" patented technology

The invention relates to a mineral processing technology for processing mixed iron ore difficult to separate and with various iron minerals. The mineral processing technology is characterized in thatraw ore with iron grade being of 21-23% and particle size being of 250mm-0mm is fed in a self-grinding machine to obtain a self-grinding product with the particle size being of 30mm-0mm, the self-grinding product is fed in a double-layer linear vibrating screen to obtain three kinds of screened products with the particle sizes separately being of +10mm, 10mm-1mm and 1mm-0mm, and the three kinds ofscreened products are subjected to different grading processing of grind grading, dry magnetic separation, wet magnetic separation and reverse flotation operation to obtain ore with concentrate gradebeing more than 64.5%. The mineral processing technology has the advantages that (1), through introduction of a high-pressure grinding roller closed circuit crushing autogenous mill stone, capacity of the autogenous mill is released; (2), a novel rotary kiln structure with chemical reaction and reduction reaction being conducted step by step is adopted, and the percent conversion of the magneticore is improved; and (3), compared with an original technology, the concentrate grade is improved by nearly 5 percentage points.

The invention discloses a self-adaptive temperature-control continuous rolling method for a magnesium alloy. The self-adaptive temperature-control continuous rolling method comprises the following steps of: (1) measuring an initial temperature and an initial thickness of a magnesium alloy plate strip, and obtaining and outputting a preset scheme according to the measured initial thickness and themeasured initial temperature, wherein the scheme at least comprises a preheating scheme and a rolling scheme of each rolling pass, and the rolling scheme at least comprises rolling passes and pre-pressing amount of each rolling pass; (2) rolling; and (3) completing rolling. The self-adaptive temperature-control continuous rolling method for the magnesium alloy disclosed by the invention measures the initial temperature and the initial thickness of the magnesium alloy plate strip; and a plate strip thickness measuring system is combined with a temperature measuring system, so that preset and real-time self-adaptive regulation is performed on the magnesium alloy plate strip rolling process by setting the preset scheme, and therefore, online temperature-control controlled rolling of the magnesium alloy plate strip is achieved. The method is beneficial for improving smooth performing of the rolling process and stabilizing product quality, and has the advantages of being less in manual intervention and realizing automatic production easily.

The invention discloses a size grading control method for coke at a blast-furnace tuyere and mainly solves technical a problem in precise control of size of coke at the blast-furnace tuyere during quality control of coke at the blast-furnace tuyere in the prior art. The technical scheme provided by the invention includes steps of removing iron particles in coke at the blast-furnace tuyere by using magnets; grading the coke at the blast-furnace tuyere with a mechanical sieve and measuring the percentage of the coke of different size grades in the total mass of the coke; crushing coke of different grades at the blast-furnace tuyere and detecting the mass ratio of iron slag in the coke of different grades at the blast-furnace tuyere through coke microscopic structure detection after sampling; and calculating the proportions of the coke of different grades at the blast-furnace tuyere in the total mass of the coke. According to the invention, correct evaluation of the degradation condition of the coke in the blast-furnace is realized and a guarantee is provided for smooth production operation control of the blast-furnace.

The invention relates to a method for mixing mineral balls, which belongs to the technical field of pellet mixing, and comprises the following steps: 1. reducing the opening of the gate of the weighing bucket; 2. controlling the feeding speed; The program realizes machine-burning and pelletizing, and machine-burning and pelletizing at the same time; 4. Arrange the feeding sequence according to the set distribution matrix; 5. Pass the feeding sequence set in step 4 and mix on the belt. The present invention is applicable to the ratio of 40-60% of the pellets, machine burning + pellets, machine burning + pellets at the same time to achieve the purpose of fully mixing, avoiding the pellets from being distributed to the center and edge, and placing them in the middle of the platform as much as possible Position to prevent the pellets from rolling to the center, and the air flow in the high-temperature pulverization center is suppressed; at the same time, it avoids frequent fluctuations of the furnace wall slag skin and reduces the impact on the furnace condition.

The invention relates to the technical field of ironmaking, in particular to a method for producing direct reduced iron by using lignin as a reducing agent. The invention provides a method for preparing direct reduced iron with energy saving and environmental protection, simple process and high production efficiency, and the method meets the requirements of low energy consumption, low cost and environmental protection in iron and steel production.

The invention discloses a method for eliminating a horizontal-vibration linear offset of the tail of short-process thin strip steel. The control method can eliminate the horizontal-vibration linear offset of the tail of short-process thin strip steel by control over centering of guide plates of rolling mills through measurement of rolling central lines, control over tail sleeving of loops, controlover the rolling force and roll bending force, control over the time sequence of a water system, control over the rolling tonnage of working roller, and control over the temperature of plate blanks.By adoption of the control method, the problem of the horizontal-vibration linear offset of the tail of ultra-thin CPS materials is solved; the technical problem that the plate shape of the tail of ultra-thin strip steel rolled through a short process is difficult to control, and consequentially, tail whipping and instable production are caused is solved; and high-quality and high-stability large-scale production of the ultra-thin strip steel rolled through the short process is realized.

The invention discloses a method for inhibiting bonding of pellets in a COREX shaft furnace and belongs to the technical field of melt reduction ironmaking. The method comprises (1) roasting green pellets to obtain finished products of oxidized pellets, (2) placing the roasted oxidized pellets into a disc pelletizer, spraying water to wet the pellets, carrying out rotation of the pelletizer along with addition of solid inhibitor powder and spraying of a certain amount of water so that the pellets are uniformly coated with solid inhibitor layers and coated pellets are prepared, and (3) drying the coated pellets, adding the coated pellets into a load reduction furnace and carrying out reduction at a reduction gas temperature of 800-950 DEG C. The method can effectively improve the problem of the agglomeration of the pellets in the COREX shaft furnace process, is beneficial to smooth production of the pre-reduction furnace, improves utilization efficiency of the COREX shaft furnace, and reduces a direct reduction iron production cost. The reduced pellets have a bonding index less than 25%.

The invention discloses a magnesium alloy continuous extrusion and temperature controlled continuous rolling production method. The method includes the following steps: (1) extruding magnesium alloy billet into magnesium alloy plates and strips; (2) measuring initial temperature and initial thickness of the magnesium alloy plates and strips, and obtaining and inputting a preset scheme according tothe measured initial temperature and initial thickness, wherein the scheme at least includes a preheating scheme and a rolling scheme for rolling passes and the rolling scheme at least includes the rolling passes and pre-press quantity of the rolling passes; (3) rolling; and (4) completing the rolling. The magnesium alloy continuous extrusion and temperature controlled continuous rolling production method adopts a rolling method of combining the continuous extrusion and on-line temperature controlled rolling, realizes the efficient continuous operation of the continuous extrusion and temperature controlled rolling process of the magnesium alloy billet through adaptive control of the extrusion and rolling process of the magnesium alloy billet, and matches real-time state of the plates andstrips, which is beneficial to improve the smoothness of the rolling process and the stability of the product quality.