34results about How to "Guarantee smooth production" patented technology

The invention discloses a jacking method of a rack of double-sided shears. The jacking method comprises the following steps of (1) determining the full load weight and the unbalanced centre-of-gravity position of the rack under the condition that components on the rack are not dismantled; (2) determining jacking devices for jacking the rack; (3) manufacturing a jacking tool and assisting contour blocks; (4) placing a sufficient number of jacking devices at the reasonable jacking positions in a jacking area of the double-sided shears; and (5) progressively increasing the height of the rack with the aid of the assisting high-equivalent blocks so as to jack the rack to the required height during the repeated station switching jacking of all the jacking devices, on the contrary, progressively reducing the height of the rack with the aid of the assisting high-equivalent blocks to complete falling and resetting of the rack during the repeated station switching jacking of all the jacking devices. According to the jacking method, rack jacking is completed reasonably and safely under the condition that components on the rack are not required to be dismantled, so that not only is the working intensity of maintainers reduced, but also the maintaining efficiency is improved, and smooth production is ensured.

A method for eliminating casting blank corner transverse cracks under a high-scrap-ratio production mode comprises the following steps that a, scrap steel classified preparation is conducted; b, control over scrap steel adding in the converter smelting process is conducted, specifically, the relation of Cueq<=0.15% serves as a scrap steel adding principle; c, heat-carrying materials are added in the converter smelting process, specifically, according to the temperature and component of molten iron and the adding quantity of scrap steel, the adding quantity of the heat-carrying materials is determined; and d, control of the N content in the converter smelting process is conduced, specifically, good-quality white ash is adopted for slagging materials, and the content of N in the steel is conducted to be smaller than or equal to 50 ppm. According to the method for eliminating the casting blank corner transverse cracks under the high-scrap-ratio production mode, quantum chemistry calculation of the influence of the content of elements such as Cu, Ni, As and N in the scrap steel on the casting blank corner quality is obtained according to long-term exploration and repeated tests, the adding quantity and types of the scrap steel are controlled in a refined mode, and the adverse factor of the high microelement content on the casting blank quality is eliminated; through titanium nitrogen fixation, steel hardening caused by the high N content is prevented; and the casting blank corner cracks can be effectively controlled under the condition of the converter large-scrap-ratio production mode.

The invention discloses a smelting method for improving the fluidity of molten steel after refining and desulfurization of rebar. The refining and desulfurization process of rebar comprises: converter smelting - post-furnace and argon station treatment - LF refining - continuous casting. The LF refining process includes: refining and sending The slag-forming material lime is added before electricity, and fluorite is added at the same time to adjust the fluidity of the slag and control the alkalinity of the refining slag to meet the standard requirements. During the power transmission process, diffusion and deoxidation are carried out. After the slag is completely melted, the power is cut off. The desulfurization efficiency meets the standard requirements; particle steel is added to increase the oxygen content in the molten steel, and the fluidity of the molten steel is improved; the components of the molten steel are adjusted to ensure that the components of the molten steel meet the standard requirements, and the temperature is qualified for continuous casting; the technical scheme provided by the present invention , After the sulfur content in the molten steel through the refining process reaches the standard requirements, an appropriate amount of high-quality particle steel of oxidizing material is added to improve the fluidity of the molten steel, avoid the clogging of the pouring nozzle, and make the continuous casting process flow smoothly.

The invention relates to a treatment method for scale, in particular to a treatment method for scale on the surface of vanadium production equipment and belongs to the field of metallurgy. The treatment method for the scale on the surface of the vanadium production equipment comprises the following steps that firstly, measuring is conducted; secondly, calculating is conducted, wherein the dosage of an anti-scaling agent is calculated according to the formula that the thickness of a scale layer times the inner surface area of the equipment is equal to 200 kg / m<3> to 250 kg / m<3>; thirdly, the scale is removed; fourthly, cleaning is conducted; and fifthly, waste liquid is recycled. According to the treatment method for the scale on the surface of the vanadium production equipment, the scale problem of the equipment under the calcified roasting-acid pickling vanadium liquid technology is effectively solved, it is ensured that production is smoothly conducted, and the production efficiency is improved.

The invention discloses a pinch roll interlock protection control method which comprises the following steps: Step 1, running pinch roll action under the automatic or manual mode; Step 2, judging whether finishing mill throws steel, if yes, moving to Step 3; otherwise, moving to Step 4; Step 3, carrying out the quick-opening process of cleaning between rolls; and Step 4, carrying out the lifting process of cleaning between rolls. According to the pinch roll interlock protection control method, under the conditions that the production technology is met and equipment safety is ensured, other detecting equipment of a rolling line area is introduced, and novel interlock protection logic is designed at the same time, so that the risk that a pinch roll is collided is effectively eliminated, and smooth production of a rolling line is ensured.

The present invention discloses a method for preventing collision of a pre-straightening steel plate and subsequent equipment, and a steel plate head warping detection apparatus. The method comprises: detecting the head warping height of the steel plate when outputting a pre-straightening machine on the head portion of the steel plate, and if the head warping height is larger than the alarm threshold, starting the roller seam rapid-opening protection of the pre-straightening machine. According to the present invention, the method uses the multiple protection mechanisms to carry out abnormal protection on the pre-straightening process; and with the apparatus, the steel plate head warping condition output by the equipment and meeting the alarming condition can be alarmed, such that the collision of the pre-straightening steel plate and the subsequent equipment can be effectively prevented so as to ensure safe production.

The invention provides a pretreatment of high-carbon and high-alloy continuous casting slabs, which comprises the following steps: A) stacking and slowly cooling the high-carbon and high-alloy continuous casting slabs; B) stacking and slowly cooling the high-carbon The high-alloy continuous casting slab is preheated; the application also provides a method for cold charging and heating of the high-carbon and high-alloy continuous casting slab, that is, the high-carbon and high-alloy continuous casting slab that has undergone the above-mentioned pre-treatment for furnace charging is subjected to cold charging and heating. In this application, by optimizing the slow cooling and cold charging heating process system of the billet off-line, the microstructure of the corners of the billet has been changed, the formation of brittle structures and oxidized decarburization layers at the corners has been suppressed, and the problem of high carbon and high alloy steel has been effectively solved. The difficult problem of cold-loading and fracture of cast slabs ensures the smooth production of high-carbon and high-alloy steels and reduces the rejection rate.