RU98117566A - DEVICE FOR MAINTAINING AN OPTIMUM DEPTH OF PENETRATION OF THE FRONT END OF OXYGEN LASER, AND ALSO WAY OF ITS SUPPORT - Google Patents

Claims (5)

1. Device for maintaining optimal penetration depth of the front end of the oxygen tuyere, including also a melting and gasification module for the production of molten iron, oxygen tuyeres located outside the circumference of the lower part of the specified melting and gasification module, a cyclone for passing the exhaust gas of the specified melting and gasification module and for separating dust from the exhaust gas, a preliminary reduction module for receiving the exhaust gas passed through the specified cyclone and for reduction of iron ore and a scrubber with a cone for regulating the pressure in the melting and gasification module, the device including a sensor for measuring distance using a laser mounted on any of the oxygen tuyeres and designed to continuously measure the depth of penetration, a computer for controlling the technological process, designed to continuously obtain distance measurements from a sensor using a laser the obtained penetration depth with a given optimal penetration depth, and to determine the difference between the actual penetration depth and the optimal penetration depth, and to determine the pressure change in the melting gasification module from the ratio between the specified pressure change in the melting gasification module and the change in penetration depth based on the difference between the actual penetration depth and the optimal penetration depth, and the cone control device in the scrubber, intended Achen for receiving from the computer for controlling the technological process data about pressure changes in the melter gasifier and to change the degree of uncovering scrubber cone to change the pressure in the melter gasifier.  2. A device for maintaining the optimal penetration depth of the front end of the oxygen lance according to claim 1, wherein a casing of high strength steel is provided on the outer part of the distance measuring sensor using a laser, and a constant slit is made at the front end of the casing.  3. A device for maintaining the optimal penetration depth of the front end of the oxygen tuyere according to claim 1 or 2, while quartz glass of constant thickness is inserted into a slot made at the front end of the casing.  4. A method for maintaining an optimal penetration depth of the front end of an oxygen lance using a method for producing molten iron using a device for producing molten iron using non-coking coal, the apparatus including a smelting and gasification module for producing molten iron, a plurality of oxygen lances located outside on the circumference of the lower part of the melting gasification module, a cyclone for passing the exhaust gas from the melting gasification module and for separating whether from the exhaust gas, a preliminary reduction module for receiving exhaust gas passed through the cyclone and for preliminary reduction of iron ore and a scrubber with a cone for regulating the pressure in the melting gasification module, the method including the following operations: setting the optimum penetration depth depending on pressure in the specified melting and gasification module at a constant flow rate of injected oxygen, determining the relationship between the pressure change in the melting gas device with a constant flow rate of injected oxygen and a change in the depth of penetration, continuous measurement of the depth of penetration by a distance measuring sensor using a laser mounted randomly on one of the oxygen tuyeres, continuous determination of the difference between the measured actual depth of penetration and the optimal penetration depth, determination of the magnitude of the pressure change in the melting -gasification module based on the relationship between the pressure change in the melting gasification module and and changing the penetration depth on the basis of the difference between the measured actual penetration depth and the optimal penetration depth, adjusting the pressure in the melting and gasification module in the amount of the change in pressure obtained by adjusting the degree of opening of the scrubber cone, and repeating the operations until the actual penetration depth is optimal penetration depth will not be the same. 5. The method of maintaining the optimal penetration depth of the front end of the oxygen lance according to claim 4, wherein the interdependence between the change in pressure in the melting gasification module and the change in the specified penetration depth at a constant flow rate of oxygen blast is determined using the following formulas:
L _o (penetration depth) = lance diameter x a x RF + b (2)
RF (circulation coefficient) = (p _go · V _o ² / g · S ² ) x (T _b P _o / T _o P) x
(1 / d _a - P _a ) (2a)
Here a and b are constant, d _a is the density of coal corresponding to 60-85% of the density of coal before loading (d _so ) and p _o is the particle size of coal corresponding to 30-70% of the size of the portion of coal before loading (p _so ).