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Device and method for monitoring flux quality changes on line

A quality change and flux technology, applied in the direction of transportation and packaging, conveyor objects, etc., can solve the problems of reduced sintering output, low BTP temperature, increased production cost of sintering process, etc., to improve sintering yield, material layer temperature uniformity, Eliminate the effect of high return rate

Active Publication Date: 2016-02-10
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to strengthen quality control, companies generally formulate detailed sampling and analysis plans. Operators in each shift take samples and send samples according to the sampling standards. However, when the daily analysis results come out, the raw materials corresponding to the sampling time may have been used up, even if the quality Abnormal, and unable to guide production operations in a timely manner, so there is a certain lag in quality monitoring
At the same time, the routinely used CFW quantitative feeding device and other equipment can ensure a more accurate hourly cutting amount, but there is no way to deal with changes in raw material quality.
In addition, for raw materials that are of good or bad quality, it is restricted by the allocation factors of the fixed number of personnel, and it is impossible for the on-site operators to wait and monitor all the time.
Once the quality of flux raw materials such as quicklime changes, the operators in the central control room cannot know and make adjustments in time, which is extremely unfavorable to the sintering process, such as deterioration of air permeability, low BTP temperature, abnormal alkalinity, and return rate A sharp increase will eventually lead to a decrease in sintering output and an increase in process energy consumption, thereby increasing the production cost of the sintering process

Method used

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  • Device and method for monitoring flux quality changes on line
  • Device and method for monitoring flux quality changes on line
  • Device and method for monitoring flux quality changes on line

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0048] Material filling coefficient φ: 0.33, screw feeder inclination coefficient β: 1, material bulk density r: 0.9t / m 3 , the speed of the screw feeder n: 90r / min, the screw pitch S: 0.25m; the screw diameter D: 0.25m, the theoretical instantaneous delivery volume Q is calculated according to formula 1 0 : 25t / h, the actual instantaneous delivery volume Q of this batch of materials: 19t / h, the degree of deviation R=19 / 25100%=76%.

[0049] When R < 80% alarm occurs frequently in the deviation degree R, the process will not be adjusted, but pay close attention to whether the discharge volume is normal, whether the equipment has deviation, jamming, etc., and notify the inspection personnel to go to the site to check and deal with the equipment. problem, make sure the load rate is normal.

example 2

[0051] As described in Example 1, when the degree of deviation R is 80% to 100%, it is a normal state and no adjustment is required.

example 3

[0053] As described in Example 1, when the degree of deviation R is 100% to 120%, and there are frequent alarms that exceed 120% instantaneously, most of the quicklime at this time has a phenomenon of coarser particle size and darker color, and it is necessary to reduce the water ratio of the mixer in time 0.1-0.2%, if necessary, increase the coke powder by 0.5%, and closely follow the change of CaO content in sintered ore.

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Abstract

The invention relates to a device and method for monitoring flux quality changes on line. The device comprises a control system, an operation display system, a material bin, a gate valve, a screw feeder, a variable frequency motor, a speed sensor, a weighing sensor and a belt. A storage device is arranged in the control system, the operation display system displays monitoring data to achieve real-time early warning, the gate valve is installed on a cone-shaped discharging hopper of the material bin, the screw feeder is located at the end of an outlet of the cone-shaped discharging hopper, the variable frequency motor drives the screw feeder, the speed sensor is installed on the variable frequency motor, and the weighing sensor is fixed to the belt to operate accordingly. By the utilization of the method, the quality changes of quick lime and other flux can be automatically monitored on line, an operator away from an on-site central control room can easily find the quality changes in time and adopt operation adjustment to reduce fluctuations of sintering quality, the sintering effects of a full BTP graph, relatively even material layer temperature, good permeability and others are achieved, in this way, the sintering finished product rate is increased, and process energy consumption is lowered.

Description

technical field [0001] The present invention relates to flux quality monitoring technology, more specifically, relates to an on-line monitoring flux quality change equipment and method. Background technique [0002] The extensive use of sinter in iron and steel smelting is conducive to reducing the cost of blast furnace smelting. Therefore, efficient production of sinter is always the direction that the industry in the field of iron and steel metallurgy is constantly striving to explore. [0003] The flux raw materials commonly used in sintering are: quicklime, limestone, serpentine and dolomite. Among them, quicklime (CaO) plays a vital role in the sintering process: adding quicklime can improve many smelting indicators of sintering, and quicklime reacts with water to form calcium hydroxide (Ca(OH) 2 ) exothermic reaction, the released heat of digestion can increase the material temperature of the mixture, and the sintering production practice shows that: the increase of t...

Claims

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Application Information

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IPC IPC(8): B65G47/19
CPCY02P70/10
Inventor 谢学荣姜伟忠王跃飞向家发鲁健
Owner BAOSHAN IRON & STEEL CO LTD
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