In 2014, the science and technology front of Chinalco Shanxi Branch kept a close eye on the implementation progress of major science and technology projects, accelerated the promotion of independent research and development projects, and promoted the latest research results in the application of processes and equipment, effectively improving the quality of alumina's main business. The innovative in-line alumina process is a major science and technology project for the company to reduce the aluminum-silicon ratio year by year and reduce the alumina production cost. In December last year, the overall technology of the project passed the technical acceptance and results appraisal of the China Nonferrous Metals Industry Association and has reached the international advanced level.
1.Automatic
continuous feeding, unlimited length, improve production efficiency and reduce
production costs.
2.It adopts
numerical control, running information and status feedback in time, and the
operation is simple.
3.The use of
numerical control program adjustment ensures the machining accuracy of the
workpiece.
4.Hydraulic
clamping of the material, smooth operation, to ensure the processing accuracy
of the workpiece.
5.The device is
simple and convenient to operate, safe and reliable in performance, and high in
production efficiency.
Heel Milling Machine,Milling Machine for Angle Steel Heel,Angle Steel Heel Milling,Steel Angle Milling Machine Shandong EN FIN CNC Machinery Co., Ltd , https://www.shuofangcn.com
Innovative Tandem Process Over the years, the Shanxi Branch has implemented a series of alumina production technologies to achieve comprehensive utilization of ores and drastically reduce the mineral and alkali consumption of alumina production, based on the hybrid production process. The pioneering innovative in-line process in China has significantly reduced alumina and sodium oxide in the red mud.
The company gathered technical advantages, vigorously promoted the important sub-item of the innovative in-line method, the Rapid Separation and Washing of Red Mud, and set up six unit offices including the first alumina plant, technical center, and production and operation department as the main test work group. Production preparation, on-site commissioning, security, technical support, and other aspects provide support. Since the process equipment of this project was used for the first time in the clinker dissolution and separation system, after more than half a year of trial run, it was found that the process, equipment, operation, and control still had some similar water quality that did not meet the requirements and caused the system to be blocked, and the electrical equipment was frequently de-energized. The problem of poor control of floating targets and other issues caused delays in the normal operation of the project. The working group quickly improved the management process by improving the soft water system and increasing the filter cloths of different manufacturers. In July of last year, all of the six belt filter units in the Red Mud Rapid Separation and Washing System had been fully equipped with production capacity and were included in normal production management. The three high-concentration and high-density liquids passed through the dissolution mill were successfully achieved. The amount of material discharged from the dissolution mill exceeded 240t/. h. Play the technical advantages of the innovative in-line process.
Breaking through the core links In addition, the effective promotion of the promotion and application of Bayer's technology is another major scientific and technological project of the Shanxi Branch. This project is supported by advanced testing, equipment, and process technology, and it is also used for the settlement of the second alumina plant's Bayer process system. Decomposition, evaporation, dissolution and other key aspects of the implementation of technological transformation, and ultimately achieve the purpose of improving Bayer's output rate and reducing process consumption.
In order to ensure the stable operation of the leaf filter process, in March of last year, the technical center of the enterprise and the second aluminum oxide plant decided to start the project of promoting the application of composite filter aid technology for sodium aluminate solution and change the original single filter aid composition. Explore the proportion of fly ash and lime milk to achieve better results.
It is understood that lime milk and fly ash in the filter aid role in the opposite, the lime milk can improve the filter effect of the leaf filter, increase process capacity, but excessive use will cause increased red mud displacement, increase the loss of alumina However, adding fly ash can reduce the loss of alumina, but adding too much will affect the quality of the product.
In response to these problems, the refinery of the plant established two fly ash storage silos near the original filter aid tank to form a simple deployment platform. The staff referenced the laboratory results and followed the lime milk, fly ash, and sedimentation crude liquor. A certain proportion of deployment, formed a set of fixed work procedures. After half a year's exploration, master the best proportion of deployment. Through improvement, the price per ton of lime milk is more than 300 yuan, and there is almost no cost for fly ash. The application of new filter aids has greatly reduced this cost, and the annual reduction is more than 3 million yuan.
Innovate to blossom in the face of the company's energy-saving emission reduction, improve recycling efficiency, comprehensive utilization of resources, etc., to promote the implementation of a number of independent research and development projects, the project plan achieve rate of 100%.
After the successful implementation of the waste heat recovery project of the roaster flue gas, the technical center of the enterprise's technology center and the first aluminum oxide plant technicians once again aimed their attention to the residual heat of the flue gas from the kiln. After preliminary calculations and tests, technicians added a set of serpentine pipes in the exhaust pipe between the electric kiln dust collection and the chimney in the first alumina plant. The high-temperature flue gas releases heat in the pipe, and the heat comes from evaporation. Evaporation stock solution in the workshop. Through continuous improvement, the residual heat of the kiln flue gas can heat the 200m3/h evaporation liquid, which can increase the temperature of the original liquid by 13 degrees Celsius and further reduce energy consumption.
Through independent research and development, a number of new technologies such as new-type red mud effluent equipment water diaphragm pump, clinker kiln new exhaust gas purification technology, new technology and equipment for intermediate cooling of seed separation tanks, and high-pressure dissolved steam condensate from secondary steam evaporating and other technologies Projects are being implemented in full swing.
In addition, the technology center also led the development of science and technology innovation management system, science and technology project management practices, technological innovations management practices, patent management practices, and issued for implementation, revision and improvement of the chief engineer, the engineer in charge of performance evaluation methods, scientists lit work enthusiasm. Shanxi Branch’s annual patent application received 11 items from the State Intellectual Property Office and 6 granted patents. In particular, the Technical Center completed the first externally-received project, “Preliminary Desilication and Dissolution Settlement Performance Tests of Four Mines in Wuyuan Mine,†and obtained the first external order.
The phrase "science and technology is productivity" has been vividly reflected in the Shanxi branch's scientific and technological innovation work. The vast number of scientific and technological workers explored the path of innovation and used new technologies and new equipment to eliminate barriers in the sustainable development of enterprises, and made outstanding contributions to continuously optimizing alumina technology, improving indicators, and reducing consumption.
