SU1018997A1 - Automatic control system for process of magnesium-thermic reduction of titanium tetrachloride - Google Patents

Description

The invention relates to the production of metals in the rare metal industrial industry and can be used to control a group of reactors in the preparation of a titanium sponge.

A known system for automatically controlling the processes of magnesium-thermal reduction of titanium tetrachloride, comprising titanium tetrachloride metering units, a weighing system, a program-computing device consisting of a random access memory, a program block, an operational device and a drain control device,

All flows entering and leaving the reactor are monitored by weighing the reactor. During discharge, TiC simultaneously enters the reactor, which introduces an error both in determining the weight of the discharge and in determining the start of the next discharge. This reduces control accuracy and eliminates the possibility of obtaining a product of stable quality. In addition, if the drain modes are interrupted (due to the freezing of the drain of the drain device, the absence of a cart with a drain bucket of work time), TTCED continues to flow according to a strictly defined time program. quality of the product.

The closest in technical essence and the achieved result to the invention is an automatic control system for the magnesium thermal reduction of titanium tetrachloride, which contains a dosing system, a weighing system, an information transmission addressing device to a program-computing device, whose RAM inputs are connected addressing with weighing and metering systems, and the output is connected to the input of the operating device, the second input D which is connected to the program block, and the outputs through the addressing devices are connected to the control devices for the discharge of magnesium chloride, the dosing of titanium tetrachloride and the filling of magnesium

In a known system, a more accurate control of material flows ensures

It is produced by the presence of autonomous crane weighing systems, the weighing of a trolley with a drain bucket and a dosing system TtCt. However, in case of violations of the MtfCE discharge modes, the required balance of the input and output reagents is violated, and the operating device issues a command at the next drain according to a fixed program without taking into account the violation of the previous drain. As a result, the reproducibility of the process is impaired, the quality of the product decreases.

5 The purpose of the invention is to increase the process reproducibility and product quality.

The goal is achieved by those. that a system containing a titanium tetrachloride dosing system, a reactor weighing system, a programmer’s computing device having an operating device, a program block and an on-line memory device whose inputs are connected through the addressing device to the dosing and weighing systems, and the outputs to the operational device inputs, others the inputs of which are connected to the program block, and the outputs through the addressing devices are connected to the control devices for the discharge of magnesium chloride, the dosing of tetra titanium chloride and magnesium pouring and to the information board is equipped with an electronic clock and switchgear connected to the input of the operating device, a drain sensor with an addressing device, a differentiating device whose input is connected to the weighing system through the addressing device, and the output is connected to one of the distributive inputs device and through the addressing device with the dosage system, the prohibition scheme, through which the operating device is connected to the information board and device addressing control devices dosing, draining and pouring,

0 by the first corrective device, the "inputs of which are connected via corresponding addressing devices with the dosing system and sensors for the presence of a drain, and the output with the operating device and the second corrective device connected to the program block and the operating device with the switchgear inputs connected; So, through the prohibition scheme to one of the outputs of the operating device, and through the corresponding addressing devices to the discharge sensors and the dosing system. The presence of an electronic clock allows you to control the processes not only by the material flow but also by the duration of individual operations: pouring magnesium, discharging MgCt. and feed TiCl. Thanks to the prohibition scheme, commands for control devices are issued on a combination of two signals: on the fulfillment of the regulation on the demand and on the material flow. Violation of the time limit is induced on the light panel. At the same time, a correction device: a program block makes changes to a given program for draining and feeding TiC |. Differentiation device, sensors for the presence of a drain through the switchgear ensure at the same time control over the flow of individual overations, and the correction device at the inlet of the dispensing system sums up the heater when measuring the weight of the fusion MgCf {j by changing the weight of the reactor during continuous flow TiC.4. Fig. 1 shows a functional diagram of the automated control system for the recovery of trathloride in a group of reactors; in fig. 2 is a block diagram of a software and computing device. The system contains a group of reactors 1 installed in letters 2 using an overhead crane 3 nepewattachgos along the group of serviced reactors. This way, the crane implements the 8/1 flow of the magnesium reactors by the vacuum bucket k. The discharge of chloride chloride from the reactors is carried out in a bucket 5t. Located on the carriage 6 moving along a "serving group of reactors. The supply of titanium tetrachloride to the reduction apparatus (reactors) is produced by H1 by dispensers 7, which are a dosing system that controls software and computing devices 8. A temperature sensor 9 is installed on the supply lines, connected to software-computing device 8. At Crane 3 is installed with the KMiee control unit, the magnesium pouring device 10 with the information receiving and receiving unit 1 7. 4 Connected to a software device 8. When installed in a furnace, the reactors are mounted on weight sensors 12, which are located on-site with ignition converters (they are not shown represent both weighing systems. Drainage devices of reactors are equipped with drain actuators and sensors 1 the presence of drains. The actuators and sensors 1 of the presence of drains are connected to a software-computing device 8. Software-computing device 8 (the ig ig. 27 contains an on-line memory The device (RAM) 15 whose inputs through the address devices 16 and 17 are connected to the weight sensors 12 and the dosing sensors 7, the program block 18 with the correction device 1E the electronic clock 20 and the switchgear 2V, whose inputs through the devices 17 and 22 addressing devices are connected to dispensers 7 and sensors 1 for the presence of drains, a correction device 23, whose inputs are connected through devices 17 and 22 to dispensers 7 and sensors 1 for plums, D1 ") a factoring device 2, whose input is through a device 1b addressing connection with sensors 12 weights, and output with a switchgear and through addressing device 17 with dispensers 7, and an operating device 25, the inputs of which are connected to the outputs of the RAM 15 of the program block 18, the switchgear 21, the electronic clock 20 and the corrective device 23, and the outputs through the prohibition circuit 26 and the corresponding addressing devices 17, 27J 28 are connected to the metering device. frame 7 Titl; to control device 10 for pouring Mg, device 13 s, liv and information board 29. The inputs of the correction device 19 are connected to the outputs of the operating device 25 (according to TiCt.H MgCI), Temperature Sensor E and block 18 of programs (according to go and exit). The output of the operating device 25 of the worm prohibition circuit 26 is also connected to one of the inputs of the switchgear 21. The system works as follows. After installing the reactor 6 Furnace and draining condensate magnesium, from the control panel to the operational memory, the device 15 receives a command to memorize the weight (the signal from the weight sensor 12 and the command to fill the miniature. With the start of the magnesium filling, the weight of the reactor device 2 appears with a signal which, through the distributor device 21 in the operating device 25, starts the counting of the pouring time on the electronic clock 20 In the operating device 25, it is a comparison of the weight of the filled in ( The weight measured by the signal from the sensor 12 takes into account the filled primary reactor weight with the programmed in block 18. When filling a specified amount, the signal from the inhibitor circuit 26 through the addressing device 27 sends a signal to the pouring device 10 to the pouring control device 10. After the completion of pouring by the signal from the differentiating device, the countdown of the time for pouring ends and at the same time the dosing units start up. If, for any reason, no signal is received at the time specified by the program block about the beginning and end of the pouring of Mp, then on the information board 29 a message is displayed about the failure of pouring fV. After the start of dosing of the Ti Civ signal from the metering units through the switchgear 2, the Dosing Time begins in the operating device 25. In the random access memory 15, the amount of missed TiC is read. Operational device 25 compares the number of programs launched with the 18 programs specified in the block. The program passes TiC v adana by two parameters: the value of the dose and the speed of passing the dose. The operating device determines the total amount of the skipped TUSA and the rate of supply of TiC, compares it with the specified one and, if it deviates from the specified values, issues a command to change the dosage regimen. When a certain dose is missed according to a predetermined program, the operating device 25, through the prohibition scheme 26, issues a command to drain the MSHG, and to the time countdown. After the time specified in the program block does not receive a signal from the drain sensors, the information about the violation of the mode plum. 97 With the start of the drain from the sensor 1 of the presence of a drain through the addressing device 28 and the switchgear 21 in the operating device 25, the time begins to count on the electronic clock 20. Information about the amount of the drained. It is formed in the operating device 25 by changing signals about the weight of the reactor. This takes into account the amount received during the draining period, according to the signal coming from the correction device 23. In the operating unit 25, the amount of the discharge is compared with the one specified in block 18 of the programs and when the prohibition specified through scheme 2b is reached, the command to the control unit 13 is issued to stop the drain. At the same time, the time is recorded on the electronic clock. If at a given time a signal about the end of the drain is not received from the G4 sensors of the presence of a drain, information about the violation is received through the prohibition scheme on the information board. drain mode. Information about the violation of the drain mode is also sent to the information board if the specified amount has not been drained in the prescribed time. At the moment when the drain is completed, the operating device determines the amount of the actually leaked fused, Ha at the moment and issues a signal to the correction device 19. Corrective device generates a command to adjust the value of the subsequent drain. If the deviation of the discharge exceeds the permissible value, the command is issued to re-drain or stop feeding hCH, In the event of a temporary holding at a predetermined temperature, the supply of TiCl is continued, and the program is drained. The function of the switchgear 21 is to select the signal necessary at a certain point in the course of the technological process from the presence of sensors for the drain, differentiating device, dispensers and prohibition scheme, by the presence of which funding is given for the start or end of a single operation. The switchgear is an electronic switch. The correction device 23e, implemented in schemes U1, provides for the correction of the task for discharge from the account of the missed TiCl / during discharge. Corrective device 18 is an operating device that compares the actually missed flows with a given number and generates for the program block an adjustment for its effect. All software and computing device 8 can be implemented on the basis of UVK MBOO. The use of the proposed system will improve the reproducibility of the recovery process and the quality of the titanium sponge due to more accurate material flow control and timely detection of disturbances in the process flow during the flow control. The economic effect of using-. of the invention on a group of furnaces is 100 thousand rubles. in year.

Claims (1)

AUTOMATED CONTROL SYSTEM FOR MAGNETIC THERMAL REDUCTION OF TITANIUM TETRACHLORIDE, containing a titanium tetrachloride dosing system, a reactor weighing system, a software and computing device having an operating device, a program unit and random access memory, the inputs of which are connected to the inputs with the inputs an operating device, the other inputs of which are connected to the program block, and the outputs through the address devices The circuits are connected to control devices for discharging magnesium chloride, dosing titanium tetrachloride and pouring magnesium and to an information board, distinguishing with “in that, in order to 'improve' the reproducibility of the process and the quality of the product, it is equipped with an electronic clock connected to the input of the operating device and a distribution device, sensors for the presence of a drain with an addressing device, a differentiating device, the input of which through the addressing device is connected to a weight measuring system, and the output to one of the inputs limiting device through an addressing device with a dosing system, a prohibition circuit through which the operating device is connected to information boards and addressing devices of control devices before dosing, draining and filling, the first corrective device whose inputs are connected through the corresponding · * addressing devices with a dosing system and sensors for the presence of a drain, and the output with an operating device and a second corrective device connected to the program unit and to the operating devices ohm, and the inputs of the switchgear are also connected through the prohibition circuit to one of the outputs of the operating device, and through the corresponding devices the addresses are; - to the sensors of the presence of the drain and the dosing system >