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Recently, the Ministry of Supply Management s Shougang Jingtang completed ahead of the cold solid pellet quality and expansion transformation, and practical results. After the transformation, the cold pellets Nissan
Capacity from 200 tons to 350-400 tons, monthly production reached 12,000 tons, with a steel-making will once DUST all processed into pellets of cold
Force per month for the company to create more than 400 million yuan in economic returns.
Cold pellet project is the production of dust production of steel required coolant line steelmaking dry. The process principle is to add the the steelmaking dry DUST
Wetted by water, then add a certain percentage of bonding plastic storage after a certain period of time to digest, and then integration by powerful grinding roll Pressing, and the use of sets of
Hot exhaust gases of the tube kiln drying molding semi-finished products to increase the strength, and then the shaker screen the small particle size and powder materials, the final production issued by the successful
Points of stability, uniform size and good strength of the product – the cold pellets. Cold solid pellets as steelmaking coolant, replace part of the sinter amount
Of solid waste recycling, effectively reducing the cost of steel making.
To continue to improve product quality, the Department, in coordination of the units in the October pre-production process, production line fluctuations in product quality, production
Capacity do not increase, the organization of professional and technical personnel according to the technology, process, operation, and other aspects of fixed-point detection through the layers of check, seriously divided
Analysis, technical deficiencies in existing production line to supplement and improve, to solve the bottleneck problem of restricting the production: First, to raise the temperature to meet the original
Material digestion conditions.
Increase in heating them in sealed digestion positions, increase the surface temperature of the steel warehouse to meet the basic requirements of the digestion of raw materials. With
They have also taken a cold-water heating methods, raw materials and improve the digestion rate and temperature, a better solution to the issue of raw material digestion delay. Two
Adjust the screening area, to improve the screening effect. Before the transformation, the sieve used in the production line is only applicable to the screening requirements of daily production capacity of 200 tons. After the transformation
Daily output has reached more than 300 tons, the existing sieve screening capacity is insufficient, and with gray sifting, affecting the
The quality of raw material. To this end, they sieve aperture, sifting area of ??re-estimates, the replacement of the two sieve. Through the transformation, the product catalog
Before with flour yield dropped significantly, to meet the needs of the raw materials and screening. The third is to control the water to ensure the raw material digestion characteristics of needs. According to the electrostatic precipitator ash
Inherent characteristics of the steel-making once dust ash by adding water, and more adequate time in order to reduce dust ashes lime activity, to meet production
Requirements. Water control and digest the length of time is a key link in the organization of production process. Is to solve the difficulties of adding water, they organized the professional and technical
Continuous attendant jobs, re-calibration and to grasp the relationship between the amount of water and raw material digestion time, amount of water on product strength, humidity and other data
. Based on these data, they take the limit card to limit the amount of water control valve opening, so that the open limit, check basis. After a week of the inspection
Measurement, the moisture content of the wet bulb control in the 1.8 to 2%, the initial average intensity of 250 Newton 400 Newton, an effective solution to the product powder
Of the problem. Is to seize the key areas to strengthen the post operation. In Cold solid pellet production processes, they focused on capturing the raw material, add water, raw materials mixed grind
Repression, product shipments and other important links, to strengthen the management of posts. They use in front of the class to staff positions, lectures, focusing on the digestion
Relationship between the ratio of the material and return material; mixed with crushed dry material, wet material and rubber; pressure dome pressure and the product strength; control and production of the product loading time
The product contains the powder rate. By strengthening job hands-on training, product quality, production has been significantly improved. At present, the first sieve into a ball
Rate of 15 percent in the past, now more than 80% of the finished product containing the powder rate dropped to 10-15%, product quality steelmaking operations department affirmed.
