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In the mining activities, a large amount of valuable manpower, equipment, energy and materials are not only consumed in the production activities of the ore raw materials, but also have to be consumed in the activities of stripping or excavating the rocks around the deposit. Therefore, the rule of black gold mine production statistics the results not only to "Black metallurgical and mining product production" and to include the statistics of the total mining, stripping, tunneling work, including three in order to be able to fully reflect investment in ferrous metallurgy and mine production activities Output situation.
Black metallurgical mine operation
(1) Total amount of mining and excavation
The total amount of mining and excavation refers to the total amount of work for mining, stripping, and excavation operations in a specific period of time. It is a comprehensive indicator reflecting the workload of the mine and the basis for calculating other relevant technical and economic indicators. The amount of work is calculated in “tonsâ€.
Its calculation formula is:
Total amount of mining (excavation) (tons) = amount of mining (tons) of ten pieces (distribution) (tons) ten other operations (tons)
Calculation instructions:
The total amount of mining and stripping (excavation) does not include the amount of work completed by the nature of capital construction, renovation and renovation, and the amount of ore produced by-product. This part of the workload should be reflected in the statistics of capital construction, renovation and renovation.
(2) The amount of minerals in the palm
The amount of gold produced in the palm is the workload indicator for the ore operation during a specific period of time. It is the calculation basis for the mining work efficiency, equipment efficiency, depletion rate, recovery rate, stripping (excavation) and other indicators.
The amount of ore produced by the palm refers to the amount of ore blasted from the face, including the interlayer that cannot be mined and the surrounding rock that has collapsed. Through various means of transportation, it is transported to the well or through the open pit. The amount of ore transporting the roadway, not including
Including the production of excavation, the production of ore from the stripping, as well as the ore from the various projects of capital construction, renovation and maintenance, and the non-production sector (such as employee mining) and enterprises outside the enterprise. The amount of ore purchased.
(3) Peeling amount
The amount of stripping refers to the amount of mine work that the open-pit mining mine strips and transports the surrounding rock and interlayer of the deposit to a designated dump site outside the mining boundary in order to obtain useful minerals.
The amount of peeling includes the following items:
(1) Production stripping, expansion and stripping, and trenching development;
(2) Renovating the amount of work in the slope and the boundary;
(3) The amount of waste rock and surface soil outside the specified boundary line is thrown during directional blasting.
The amount of peeling does not include the following items:
(1) The workload of the single-walled road turn over the lower step and the amount of waste rock and topsoil that fall within the specified boundary line by directional blasting;
(2) Production prospecting, the amount of work laying railway, motor lane, road and track winch;
(3) The amount of demolition of capital construction, renovation and renovation and maintenance of expenses.
If the geological conditions of the mine are unclear, it is found that in the past where the waste rock was piled up, there was sufficient burial capacity of industrial grades. When it was necessary to mine and the waste rock piled up in the past and the surface were re-transported twice, this had to be re-transported twice. The amount of waste rock should also be counted as the amount of stripping. If it is not because the geological conditions are not clear, but because of the poor management of production management, or the pursuit of temporary peeling efficiency caused by the secondary reversal, it should not be considered as the amount of stripping.
When calculating the amount of peeling, the amount of stripped ore should be listed.
(4) Excavation volume
Excavation refers to the excavation of underground mining mines for normal production needs (such as transportation, ventilation, pedestrians, drainage, storage, and ensuring the “three-level ore†and the normal duration of the mining area and mining face). The workload of the wells and diverticulum.
The unit of calculation of the amount of excavation is expressed in terms of the natural extension "meter" and is used to check the completion of the tunneling plan. It is also necessary to calculate the amount of excavation in terms of “ton†and “m3†(calculated by design section) in order to adapt to the calculation of total mining volume, tunneling efficiency,
The need to dig indicators such as material consumption.
The amount of excavation includes all kinds of shafts, inclined shafts, flat shafts, slopes, slides, patios, ventilation shafts, buckets, and necks, etc., which are excavated by production development, mining preparation, cutting roadway and production prospecting. Including the amount of ore brought by various excavation works; but it does not include the amount of rock transported to repair the roof and clear the roadway, and does not include the tunneling of the project or project for capital construction, renovation and maintenance. the amount.
The amount of excavation shall be subject to the actual acceptance of the geological survey department. Unqualified excavation (including those that do not meet the design requirements, blind construction and over-excavation) shall not be counted. The repairable excavation works shall be counted after the completion of the repair and the acceptance of the experience.
When calculating the tunneling footage, the following conditions should be dealt with separately:
(l) Various diverticulums are converted into footage according to the design section of the roadway.
(2) Repairing the original roadway (even if the roadway is seriously damaged) does not calculate the tunneling footage.
(3) If there is an accident in the mining face or a change in natural conditions such as a small fault, while taking measures while taking measures, the roadway will not calculate the amount of excavation. However, the amount of excavation should be calculated due to the cutting and sloping lanes that are separately excavated due to major roofing accidents or major changes in natural conditions.
(4) In the roadway that has been excavated, due to geological changes, measurement errors and other technical errors, the footage that fails to meet the expected effect of the design and the wells that cannot be used for scrapping are all ineffective. The invalid footage can be calculated within the group and team tasks within the enterprise. If the invalid footage roadway is officially opened in the future and can meet the production needs, the tunneling capacity can still be calculated.
(5) Other workload
The other work volume refers to the amount of work that does not fall within the scope of the above-mentioned work such as peeling, tunneling, and mining in a certain period of time. It includes the amount of excavation work carried out by underground mining mines for roadway maintenance; the mines mined by filling method are used to fill the filling amount of mined areas; the old mined areas are recovered, and the amount of ore produced in the past has not been counted; Unqualified amount of ore.
Other workloads do not include the amount of work required to rework and repair unqualified roadways that were drilled during the reporting period.
Second, the output of black metallurgical mine products
For the calculation of the output of black metallurgical mine products, the following conditions must be met:
(l) meet the quality standards, pass the inspection, or meet the grade and grain requirements specified in the user contract;
(2) The iron ore that has been weighed or measured and accepted, including the natural water content, the open-pit ore does not exceed 2%, the pit ore does not exceed 3%, and the excess should be deducted.
Its calculation formula is:
The amount of ore containing moisture allowed = the amount of ore weighed × [1 - (measured moisture - allowable moisture)]
(3) to the designated location, such as mines storage, processing plant or other designated location.
Product production statistics are required to be accurate. Mines with weighing equipment should be calculated according to the actual weighing quantity; mines with temporary measuring equipment should be calculated according to the weighing quantity of the user unit, but the road loss calculated by both parties should be taken into account.
The production of products should be subject to a regular inventory system. For the reasons of production, the profit and loss should be adjusted in time for the discovery.
The formula for calculating product yield is:
Product output during the reporting period = ending stocks, ten export visas, ten self-use, initial stocks
Calculation instructions:
(1) The stocks at the end of the period and at the beginning of the period include the product balance of the ore mining, mining platform and mining bins;
(2) The number of export visas refers to the number of acceptance certificates or demand-side visas at the station or other delivery location:
(3) Self-use refers to the ore-selecting mines being ore-selected by the enterprise, which is subject to the weighing quantity of the mining (company) measurement department.
(1) The ore amount of iron ore
The ore amount of iron ore refers to the amount of ore that has been inspected by the mine during the specified period of time, and the ore is transported to a designated storage yard, concentrator or other ore processing site, which has not been processed, ore-selected, meets quality standards, and has passed the inspection. The ore amount of iron ore is calculated based on the actual amount weighed or measured. The ore volume of iron ore is a representative indicator reflecting the scale of production of mining enterprises.
The ore content of iron ore consists of the following sources:
(1) the amount of minerals in the palm;
(2) The amount of ore produced by the production of excavation and excavation;
(3) The amount of ore produced by various engineering by-products for infrastructure construction, renovation and maintenance;
(4) Clean up and recycle the amount of ore left over from the old stope that has not been counted in the past;
(5) The amount of ore and workers recovered in waste rock;
(6) The amount of ore that has been reprocessed and used in the past without counting the output.
Some explanations for calculating the ore amount of iron ore:
(l) The ore deposits and the narrow veins, together with some of the ore that have not reached the quality standard, are calculated according to the amount of ore after simple washing, sorting and treatment.
(2) Any material that does not meet the current smelting or beneficiation processing grade requirements, and due to the failure to complete the basic construction, renovation and maintenance projects, etc., the ore that cannot be used at present, does not calculate the iron ore output, and reuses the ore later. Then, calculate the output again.
(3) In order to avoid repeated statistics, iron ore mining enterprises should not include the amount of ore purchased when counting iron ore production. The amount of ore is reported by the local government statistics bureaus.
The ore content of iron ore is divided into two types: raw ore into the furnace and selected ore.
In-situ ore refers to ore that can be used as iron ore lump ore, steel-making lump ore and rich ore by simple beneficiation and crushing and screening. The selected ore is the ore that must be sent to the ore dressing for beneficiation.
(2) Iron ore finished mine
Iron ore finished ore is a mine product that meets the smelting requirements produced during a specific period of time. The iron ore finished ore is divided into four categories: iron ore lump ore, steel lump ore, iron rich ore and iron concentrate. Among them, iron ore lump ore, steel-making lump ore, iron-rich ore-rich ore is an ore that can be used as a finished product as long as it is crushed and sieved and simply beneficiated; and iron concentrate must be subjected to crushing, grinding and beneficiation and enrichment. In order to become the finished ore, China's iron ore mostly belongs to this category.
Steelmaking ore
Steel-making lump ore refers to the grade and particle size that can be directly used for steelmaking after simple beneficiation, crushing and sieving, and meets the requirements of steelmaking. The general ore grade is greater than 56%.
Iron ore lump
Iron ore lump ore refers to the grade and particle size that meets the requirements of ironmaking after simple beneficiation, crushing and sieving. It can be directly used for iron ore of ironmaking (the general grade of ore is more than 45%).
3. Iron rich powder mine
Iron-rich powder ore refers to the powder produced during the mining process of rich ore (containing 45% or more of iron) and in the process of beneficiation and crushing of steel-making ore and iron ore, known as iron-rich ore. Mainly used as a sintering material.
4. Iron concentrate
Iron concentrate refers to the iron ore after the beneficiation process, and the products obtained after processing and enrichment have higher iron content, less impurities and meet quality requirements.
According to different ore dressing methods, iron concentrates are listed as magnetic ore concentrate, red ore concentrate, and polymetallic iron concentrate.
Iron concentrates and steel-making lump ore, iron-bearing lump ore, and iron-rich ore are to be calculated separately for iron metal content and physical quantity, and iron concentrate output is calculated by dry weight.
The iron content of the ore processing capacity of the ore dressing is calculated on the basis of total iron.
(III) A few points of auxiliary raw materials ore and processed products:
Manganese ore (1) auxiliary materials ore, chrome ore ore production, refractory clay mineral, magnesite, limestone, fluorite, dolomite, silica mine iron ore production method of calculating a reference, divided ore and Two types of finished ore.
(2) Processing products of auxiliary raw materials and minerals. Manganese powder refers to the product that meets the requirements of the supply contract after the manganese sand has been crushed by a ball mill or a Raymond machine.
(3) Fluorite concentrate refers to products that meet the quality standards produced by fluorite through ball milling and beneficiation process.
(4) All kinds of selected mineral powders are calculated according to the dry amount after deducting water.
(5) The quantity and quality of refractory clay mineral products are calculated according to the finished ore after calcination.
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