In the heat of July, the land of Qilu is also the annual season of corn fragrance.

The reporter of China Mining News came to Hongda Mining Co., Ltd. in Dongping County, Shandong Province, and saw a happy picture of strong development, high quality, excellent ecological environment, and good living mining area. Three years ago, the company was still a "mess" that could not make ends meet and suffered long-term losses.

"Ecology is the foundation of mining. Green is the lifeblood of enterprise development. In recent years, through the establishment of green mines, we have not only completely changed the ore capacity and appearance, but also realized the efficient utilization of resources, improved the core competitiveness, realized turning losses into profits, and put the enterprise on the road of green and high-quality development with coordinated development of ecological benefits and economic benefits." Duan Yude, the chairman and general manager of the company, said deeply.

1. Ecological mining to consolidate the foundation of development

"Our Hongda Mining Co., Ltd. is well built and is a veritable garden mining area. If you have time, please go and have a look!" As early as June this year, Sun Li, general manager of Shandong Jingu Holding Group Co., Ltd., recommended the green mine construction experience of Hongda Mining Co., Ltd. to reporters. Although I heard its name early, when I entered Hongda Mining Co., Ltd., the reporter still looked at it: when I entered the gate of the mining area, I was confronted with a magnificent picture of the Great Wall; On the green space on both sides of the gate, grass is green and flowers are in full bloom; On both sides of the tidy roads in the mining area, the tall and straight poplars and graceful weeping willows make the summer heat subside. If we had not seen the towering well tower and the transport corridor in the air, it would be hard to imagine that this is a large iron mine with an annual output of 2 million tons.

It is understood that the company was founded in May 2005, with iron ore reserves of 96.34 million tons and an average grade of 29%. In September 2006, the mine construction started. The mine is designed to have an annual production capacity of 2 million tons, with main and auxiliary shafts, east and west air shafts and supporting concentrators and filling stations with an annual processing capacity of 2 million tons. Due to the low grade of iron ore, complex mining conditions and other reasons, as well as the low domestic iron ore prices in previous years, the company has been losing money before 2020.

There are only loss making enterprises and no loss making industries. In October 2019, since Duan Yude took over the company, he began to make beneficial exploration on how to strengthen the construction of green mines, accelerate the transformation of intelligent mines, reduce mining and dressing costs, seek higher benefits, and build a first-class modern mining enterprise through green mines and intelligent construction.

Green mine construction focuses on efficient and comprehensive utilization of resources. The company places resource conservation and comprehensive utilization at an important position, strictly implements the Plan for the Development and Utilization of Mineral Resources, and constantly improves the utilization rate of resources. They will recycle, reprocess and grade the waste stone generated from the original waste disposal into usable aggregate for construction; The tailings are dewatered and classified, and processed into machine-made sand for sale to the society, which not only makes the resources clean, but also turns waste into treasure, creating a new economic growth point for the enterprise.

"Now we can create more than 10 million yuan of direct economic benefits for the company in terms of the comprehensive utilization of waste rocks and tailings every year." Duan Yude said happily that through the comprehensive utilization of waste rocks and tailings, the enterprise has not only created higher benefits, but also produced good ecological benefits, greatly reducing the exploitation of surrounding rocks, yellow sand and other non renewable resources, and also eliminating the land occupation and pollution caused by the discharge of solid wastes, Realizing the real sense of green.

For water resources, the company is also careful to make full and reasonable use. At present, through the implementation of water control schemes such as drainage in the whole pit and advanced drainage in the mine, the company has controlled the daily water discharge in the day and night to be less than 5000m3, which maximizes the reasonable discharge of water resources while meeting the water demand of the beneficiation workshop.

In order to build a beautiful mining area, the company has recently upgraded the roads in the entire plant area, implemented centralized surface placement and unified "shed design" for iron concentrate powder, coarse tailings, gravel yard, etc., widened and renovated all underground transportation roadways, and realized the "line project" of railway, lighting, and pipeline.

In the construction of green mines, the company also strictly ensures that the geological environment treatment and land reclamation are carried out in accordance with the requirements of the mine geological environment protection and land reclamation plan. It timely manages and restores the mine geological environment, reclaims the land occupied by the mine and damages the land, ensures that various sites after restoration and treatment do not pose a threat to animals and plants, and coordinate with the surrounding natural landscape, So as to minimize the occurrence of mine geological disasters and geological environmental problems, avoid or reduce the losses caused by geological disasters, and effectively curb the damage to land resources, topography and landscape.

In order to strengthen the comprehensive management of the mine environment, the company has also developed an environmental monitoring mechanism, established a special organization, equipped with full-time management and monitoring personnel, and carried out dynamic monitoring on pollution sources and pollutants such as mine water, dust, noise, etc. The monitoring data are managed by special personnel and disclosed to the public.

Taking the green mine construction as an opportunity, the company eliminated a number of processes and equipment with high energy consumption, high pollution and low efficiency, introduced and used new equipment with high efficiency and energy conservation, and realized energy conservation in the whole process of mine production; The energy consumption accounting system for the whole process of mine production has been established, and the relevant energy use responsibility system has been formulated and implemented in place; By taking energy conservation and emission reduction measures, we will control and reduce energy consumption, material consumption and water consumption per unit product, and reduce the emission of "three wastes".

2. The source of activating the development of mining by science and technology

Scientific and technological innovation is the key for enterprises to achieve green and high-quality development.

In recent years, Hongda Mining Co., Ltd. has actively selected and promoted the mechanized, automated, information-based and intelligent mining technologies and processes encouraged and supported by the state around the goal of "mechanized replacement and automation reduction". As early as the beginning of 2020, the company has realized automatic remote control of underground ventilation equipment. This year, they accelerated the advancement of filling automation, completed the transformation of the first group of equipment by the end of June, and expected to complete the transformation of the second group of equipment by the end of August. In addition, the company also realized the automatic control of underground drainage before the end of June. At present, they are investigating projects such as driverless transportation system and automation of belt grinding and dressing in the concentrator, and plan to put them all online this year.

The company has always been committed to the research and discussion of mining and filling balance, room mining and other aspects, constantly improved and innovated mining methods and methods in practice, and created a good circulation mode of dual promotion of ore production and goaf filling. They changed the original small section shallow hole shrinkage and mining into large and middle section mining and medium and deep hole mining through innovation in room mining, so as to improve the overall mining efficiency; By reducing the number of closed mines, it is estimated that the labor cost of 13 mines will be reduced by about 10 million yuan; By gradually reducing the thickness of the ore room and increasing the filling concentration, the ideal goal of "soft sealing of the ore room" is finally achieved.

At present, the automation transformation completed by the company mainly includes: the underground ventilation system realizes the remote control of fans, and the personnel on duty can adjust the fan frequency and ventilation volume at any time according to the underground ventilation situation in the dispatching room; The underground air pressure system realizes remote control of the air compressor, and the automatic control system automatically adjusts the start and stop of the air compressor according to the underground air consumption to ensure constant pressure air supply; The lifting system of the main and auxiliary shafts realizes centralized control to ensure safe and efficient operation of the main shaft ore handling and lifting, auxiliary shaft personnel and equipment and materials going up and down the shaft; The underground goaf filling system can be automatically transformed. The dosage of flocculant and cement powder can be automatically adjusted according to the slurry concentration and flow pumped by the concentrator, and the settling and mixing time can be automatically controlled to achieve high concentration filling.

"Next, we will continue to promote the automation transformation: first, the underground drainage is intelligent. According to the water level and rising speed of the water bin, the intelligent duty of the drainage pump is automatically arranged, taking into account the time of peak and valley electricity prices, so as to achieve efficient drainage on the premise of saving electricity costs. Second, the automation of the belt crushing system of the concentrator. The belt and crushing equipment can be started and stopped in reverse order, and the running time of the equipment in the area can be automatically adjusted according to the level of the transit bin. Third, grinding, screening and screening System automation. Through the built-in expert system, various monitoring data are used to make the mill and screening in the best operating condition. " Duan Yude said as he knows, the company will promote intelligent and intelligent mine construction through automation transformation; Through the construction of green mines, the discharge of solid wastes will be eliminated to form good enterprise society ecological benefits; Through the construction of smart mines, we will strive to achieve a truly "safe, green, scientific and technological" mine by 2022.

3. Protect mine safety and stick to the bottom line of development

Safety is the bottom line for the survival of mining enterprises and the cornerstone of green and high-quality development of mining enterprises. In recent years, Hongda Mining Co., Ltd. has been practicing the guideline of "resolutely shouldering responsibilities and keeping the bottom line of safety", earnestly implementing national laws and regulations, and strictly following relevant regulations to build mines.

The safety concept is imperceptible. In the mining area of the company, various safety signs can be seen everywhere. In the passageway leading to the auxiliary shaft, they have built a safety culture corridor with ingenuity. "On the scale of life, life is always more important than money", "Don't work against rules, and go home safely to ensure health" and other warm tips, safety culture concepts, and safety system specifications, always remind every employee of the "alarm bell ringing, prevention".

In line with the principle of breaking through the old ideas and methods and never letting go, the company tracked and implemented the rectification of hidden dangers, and carried out special rectification of eight common problems in non coal mine safety production and six aspects in underground mine safety production. Through this rectification, they solved the problem of project outsourcing, disbanded the original outsourcing team, reorganized and optimized the construction team and incorporated it into the company's centralized and unified management; We have solved the bureaucratic problem of replacing management with contracting, and the problem of shifting security responsibilities. At the same time, they upgraded and transformed the six major systems of safety and risk avoidance, and resolutely achieved zero potential safety hazards.

"The alarm bell is always ringing, and we always pay attention to it. It is our eternal pursuit to do a good job in safety production, fundamentally eliminate potential safety hazards, and achieve long-term peace and stability." Duan Yude said that in production, the company creates an atmosphere of catching up with each other, and strives to make progress; In terms of security, we will build an iron wall to ensure a safe and sound development.

Green is the greatest productivity. Through the construction of green mines, the company has achieved good economic benefits on the basis of manufacturing ecological products and creating good ecological benefits. In 2020, the company successfully passed the provincial green mine acceptance, and achieved the first profit since the mine was built. The company submitted a gratifying answer sheet with sales revenue of 340 million yuan, profits of 102.07 million yuan, and taxes of 41.95 million yuan.

"This year, we plan to apply for state-level green mines, and constantly improve the company's mine brand awareness and influence. At the same time, we strive to gradually increase the iron ore production from the existing capacity of 2 million tons to 3 million tons, and the annual iron concentrate output of the concentrator from 450000 tons to 650000 tons through cooperation with Beijing Jincheng Mining Management Co., Ltd., so as to truly build the company into a domestic first-class green mine with high efficiency, energy conservation, clean and environmental protection, and ecological Mine, intelligent mine, humanistic mine! " Duan Yude finally said.