As we all know, the Green Manufacturing Engineering Implementation Guide (2016-2020) was officially released on September 14, aiming to achieve efficient, clean, low-carbon cycle and sustainable development of the manufacturing industry.
In view of the above, the current Cement mining enterprises How to innovate“ conserve energy ,reduce emissions ”Measures? How to improve economic and environmental benefits? What are the specific measures for building a green landscape mine? With these questions in mind, the reporter from China Cement Network recently interviewed the first batch of national registered mining engineers, senior mining engineering experts, and Tianjin Cement Industry Design and Research Institute Xie Xianzhong Professor level senior engineer.
1、 Innovation is the soul of "energy conservation and emission reduction" in mines
Reporter: As we all know, the Green Manufacturing Engineering Implementation Guide (2016-2020) was officially released on September 14, aiming to achieve efficient, clean, low-carbon cycle and sustainable development of the manufacturing industry, and promote the harmonious integration of industrial civilization and ecological civilization. In view of the above, what are the main aspects of the concrete measures for the current cement mining enterprises to innovate "energy conservation and emission reduction"?
Xie Xianzhong: Innovation is the soul of "energy conservation and emission reduction". Cement mining enterprises should not adhere to the usual practice, not violate the normal situation, dare to innovate, improve quality and efficiency, and practically achieve: innovate the "two savings and three reductions" measures, improve economic and environmental benefits, and build green landscape mines.
The so-called "two savings and three reductions" refers to energy conservation, resource conservation and reduction of "three wastes" emissions.
At present, concrete measures for cement mining enterprises to innovate "energy conservation and emission reduction" include the following main aspects:
Not used for mines that have been put into production Belt conveyor The conveyor of the self generating system (under negative power condition) can be transformed into the belt conveyor self generating system for energy saving.
For mine waste soil that cannot be processed into building aggregate, neutron activation online analyzer should be used to ensure real-time and accurate collocation of waste soil, reduce waste soil dumping, and even achieve "zero" discharge.
In a word, we should comprehensively promote the energy conservation, low-carbon emission reduction, comprehensive utilization of resources, recycling of waste soil, and green landscape development of cement mining enterprises from the above aspects to achieve the specific goals of the Guidelines for the Implementation of Green Manufacturing Projects (2016-2020).
Xie Xianzhong, a mining engineering expert and professor of Tianjin Cement Industry Design and Research Institute, made a field survey
Over the past 60 years, Tianjin Institute of Design and Research has designed and built a number of green mines with low-carbon mining methods, efficient resource utilization, environment-friendly production processes and ecological mine environment: as early as the beginning of this world, I innovatively designed belt conveyors in Yiyang Mine, Henan Province since the power generation system (saving more than 1 million yuan of electricity annually), and successively in Gulang, Gansu Province, Panxian, Guizhou Province and other places, Make full use of the natural terrain elevation difference, and successfully design the belt conveyor self generating system when negative power occurs during downward transportation, so that multiple belt conveyors can be connected to the grid at the same time and self generating and fed back to the power grid of the enterprise for the use of crushing system, dust removal system, lighting, etc., and achieve soft start and soft brake, effectively avoiding the "old difficulties" such as flying of downward negative power belt conveyor due to improper control The problem has been solved by turning harm into benefit, which has greatly reduced the operation cost of the mine, effectively guaranteed the production safety, reasonably developed clean energy, and completed the design and construction of energy-saving and low-carbon mines.
In particular, the above owners dare to accept new ideas and concepts, and they are real innovators and beneficiaries of "energy conservation and emission reduction"; For the belt conveyor that has been put into operation but does not use the belt conveyor self power generation system (downward moving negative power condition), energy-saving transformation can be carried out to enable the belt conveyor to be connected to the grid at the same time and self power generation and feedback to the power grid of the enterprise, so as to reduce costs, build a green landscape mine, promote the technical progress of the construction material mine, and design and build a veritable energy-saving, low-carbon and environmental protection demonstration mine.
2、 Precision is the key to "energy conservation and emission reduction" in mines
Reporter: As a senior and authoritative mining engineering expert, how can you achieve accurate "energy conservation and emission reduction", comprehensively realize the efficient, clean, low-carbon cycle and sustainable development of the manufacturing industry, and promote the harmonious integration of industrial civilization and ecological civilization?
Xie Xianzhong: Under the condition of market prospect, cement mining enterprises should make full use of the waste rock (cover and inclusion) in the cement limestone ore to process into construction aggregate, so as to turn waste into treasure for recycling, so that cement products and construction aggregate can be directly and synchronously synthesized into concrete products on construction sites, to maximize the output value and profit of enterprises.
However, mine waste soil cannot be processed into building aggregate. A cement plant in East China innovatively introduced DF-5701 neutron activation online analyzer, which is installed on the belt conveyor. Through cloud computing, massive chemical element big data of ore and waste soil can be processed in real time and accurately, and ore pre homogenization can be achieved accurately, It also saves the equipment and civil engineering investment of the pre homogenization yard, and at the same time, it will not generate the operation power consumption of the stacker and reclaimer.
The successful application of online neutron activation analyzer proves that:
1. It has innovatively solved the problem of real-time and accurate collocation of waste soil. Because there is no "time difference" in collocation, the traditional post control has been innovatively transformed into real-time, accurate and reliable control, and the rate of waste soil incorporation has been greatly increased to about 9.5%. Waste soil has become a gold ingot, saving resources.
2. It saves about 10 million yuan of investment in equipment and civil engineering of the pre homogenization yard.
3. The land requisition of pre homogenization yard is saved, and the precious land resources of nearly 20 mu are saved.
4. It will not produce the operation power consumption of stacker and reclaimer, and will actually "save energy and reduce emissions".
5. Due to the real-time and accurate collocation of waste soil, various investments in the waste rock yard can be saved and valuable land resources can be saved:
A、 The investment in the blind drain at the bottom of the waste rock yard is saved: the investment in the blind drain at the bottom of the waste rock yard is about 1 million yuan for 2 km under two types of terrain conditions.
B、 The investment in the intercepting ditch at the upstream of the waste rock yard has been saved: under the two types of terrain conditions, the investment in the mortar rubble intercepting ditch at the upstream of the waste rock yard is about 1 million yuan.
C、 The investment in the downstream rock retaining dam of the waste rock yard is saved: for Class 2 terrain conditions, the investment in the downstream rock retaining dam of the waste rock yard is as follows: the dam is 6.5 meters high and 40 meters long, about 1 million yuan.
D、 The investment in waste rock transportation road is saved: for Class 2 terrain conditions, the investment in waste rock transportation road is as follows: the pavement width is 10.5m, and the investment in Class Q-60 waste rock transportation road is about 2.6 million yuan per kilometer.
E、 The logistics cost of high-power waste rock transport vehicles is saved, and chemical energy is saved: the number of large tonnage fuel oil mining dump trucks used for dumping is effectively reduced, the oil consumption and exhaust emissions are greatly reduced, the pollution of exhaust gas is avoided, and the production cost is greatly reduced. This is one of the important ways to build a green mine.
F、 The investment in land reclamation of waste rock yard is saved: the investment in land reclamation of waste rock yard is about 2 million yuan per 100 mu.
G、 The greening investment of waste rock yard is saved: the greening investment of waste rock yard is about 2.2 million yuan per hundred mu.
H、 Dust pollution during waste rock disposal is avoided.
I、 It avoids the occupation and destruction of green vegetation due to waste rock disposal.
J、 The risk of debris flow in the waste rock yard is avoided.
It must be emphasized that the Green Manufacturing Engineering Implementation Guide (2016-2020) clearly stipulates that by 2020, the level of green manufacturing will be significantly improved and the green manufacturing system will be initially established. The green development concept of enterprises and governments at all levels has been significantly enhanced. Compared with 2015, the intensity of material consumption, energy consumption, water consumption, pollutants and carbon emissions of traditional manufacturing industry has been significantly reduced, the emission intensity of major pollutants in key industries has been reduced by 20%, the comprehensive utilization rate of industrial solid waste has reached 73%, and the consumption and emissions of some heavy chemical industry resources have reached the peak. The energy consumption per unit of industrial added value above designated size dropped by 18%, the comprehensive energy consumption per ton of cement dropped to 85 kg of coal equivalent, the operating efficiency of motor and boiler systems increased by 5 percentage points, and the proportion of efficient distribution transformers in grid operation increased by 20%. CO2 emissions and water consumption per unit of industrial added value decreased by 22% and 23% respectively. Most cement enterprises have a long way to go, which is gratifying: Yatai Acheng, Mingcheng, Tonghua, Shuangyang, Benxi Cement Co., Ltd., Tai'an Zoomlion Cement Star enterprises such as Co., Ltd., Nanyang Zhonglian Cement Co., Ltd., Pingquan Jidong Cement Co., Ltd., Benxi Transportation Cement Co., Ltd. have already taken the lead in innovating "energy conservation and emission reduction" measures, improving economic and environmental benefits, and building green landscape mines, It has played a typical demonstration and leading role: these mines supporting the cement group have successfully adopted the neutron activation online analyzer, which has realized the accurate collocation of waste soil and rock, saved resources and energy, reduced the discharge of stripping materials, effectively improved economic benefits and beautified the surrounding environment.
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