In the first half of 2021, according to the overall deployment of Chinalco, Chinalco and Yun Aluminum, the company adjusted the focus of production and operation according to the situation, and made great efforts to achieve good results in production and operation. From January to June, the annual production target was achieved by 61.23%, and the company's production and operation showed a steady trend.
According to reports, in the first half of the year, the company strengthened the implementation of responsibility by formulating a work plan for calibration and decomposing all factors. In June, the AO granularity was better than the alignment value of 0.69%, the first-grade product rate was better than the alignment value of 19.09%, the comprehensive energy consumption was better than the alignment value of 2.89 kg ceplink tmae ao, and the decomposition rate was 1.47% higher than the alignment value. From January to June, many key indexes such as comprehensive AC power consumption, current efficiency and unit consumption of alumina have reached the annual target value.
In addition, the company relies on scientific and technological innovation to overcome the difficulty of easy damage of high current density anode carbon block. New breakthroughs have been made in tackling key problems of high carbon and high sulfur in ores, key technologies have been mastered, and ore consumption has been reduced under the condition of declining ore quality. Vigorously promote the reduction of red mud and achieve a cumulative comprehensive utilization of red mud; more than 79241 tons of metal aluminum in primary aluminum ash have been effectively recovered, which is 1.4 ‰ lower than last year; and the test results of the new leaching process in Qiu Coal Mine have been achieved by the end of June. a total of 164800 tons of Qiu Coal Mine was consumed, and the relative leaching rate was optimized by 3.05%, a record high level.
At the same time, the company carried out a large number of benchmarking experiments on key equipment such as mill filling rate, ball ratio, cyclone, discharge screen, etc., and achieved the target of 2.09% increase in raw pulp-150 μ m compared with the same period last year, and an increase of 3.13% in-63 μ m compared with the same period last year. By taking the "innovative and effective" project as the carrier and encouraging post workers to contribute to improve the recovery rate of filter cake, the recovery rate of leaf filter cake was as high as 95.5%, and the difference between the last filter cake and dissolved red mud A _ S was reduced by 0.09. The cost was saved by more than 100 yuan / t AO; by optimizing the operation process and carrying out index competitions, the gasifier saved 3tmax of steam and reduced the steam for self-use of thermoelectric boilers by about 1.5th. by optimizing the operation process and carrying out the index competition, the gasifier saved 3tComph of steam and reduced the steam for self-use of thermoelectric boilers. By blending raw coal and improving fuel economy, the steam cost has been reduced by 15.71 yuan / t-steam compared with the same period last year, and the comprehensive cooperative operation and peak-shifting maintenance of mine, yard and second-stage crushing station have been strengthened through reasonable regional planning. the continuous reduction of ore crushing cost has been realized. The experiment of mixed combustion of various kinds of coal in boilers and gasifiers has been successfully carried out to reduce the impact of market price fluctuations on production to a great extent.
Under the condition that the resources of the two self-owned mines in the Jiuping mining area and Hongsheke mining area have been exhausted, the company has achieved an increase of 4.26% in the supply of 813700 tons of ore from mining by increasing the recovery of residual ore in the goaf, the development and utilization of peripheral sporadic orebodies, and the development and utilization of low-grade ore, the progress of the annual target has been achieved by 98.63%, and the target of ore supply has been overfulfilled. The cost of purchased ore is obviously reduced and the quality of alumina is basically controllable.
