A sintering ratio calculation and sinter cost optimization method
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A cost-optimized, sintered ore technology, applied in the field of smelting, can solve problems such as the difficulty of accurate quantification of sintering manufacturability, large fluctuations in sintered ore quality, and misleading production
Active Publication Date: 2019-04-05
WUKUN STEEL
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However, it is difficult to accurately quantify sintering manufacturability and quality in actual production, and it deviates far from linear programming, resulting in large deviations in the results of some optimization methods based on linear programming, which will also mislead production, resulting in The quality of sinter sintered by the ligand sintering fluctuates greatly
The above methods generally need to set certain restrictions to form a certain guidance for production. For example, the fuel ratio required based on iron material and flux is basically stable, and the fuel ratio required for different batches of returning ore is not the same. However, it is an optimization method aimed at reducing the fuel ratio as much as possible to achieve fuel optimization and energy saving, but it can only be limited to some specific situations
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Embodiment 1
[0038] S100: According to the relationship between sintering raw materials and sintering ore ratio, with cost as the optimization target, establish a linear programming model and bring it into an Excel table. The linear programming model includes:
[0039] Decision variable: X i =(x 1 , x 2 , x 3 ..., x n ),
[0040] Objective function: ,
[0041] Restrictions: g j （X） ≤1 (j=1,2,...m,m),
[0042] where: X i ∈R,X i is the amount of the i-th raw material; R is the basicity base number specified by the sinter, that is, the content of CaO and SiO in the composition of the sinter 2 Content ratio; i is a natural number, i=1, 2, 3,..., n, n is the type of sintering raw material; minf(X i ） = cost of the i-th raw material in the sinter ore; j is a natural number, j=1, 2, ... m, m is the number of constraints;
[0043] In this embodiment, since the raw material is a wet material, the wet unit consumption of the raw material is used as a decision variable, and the dry ...
Embodiment 2
[0059] S100-S500 are the same as in Embodiment 1.
[0060] S600: Adjust the mixing ratio in Table 3 in the Excel table of S100, then the raw material cost U is:
[0061] ,in m i is the unit cost of the i-th raw material;
[0062] Then bring other items of sintered ore into Table 4:
[0063] Table 3 Sintering ratio and cost forecast table
[0064]
[0065] Table 4 Sintering cost forecast table
[0066]
[0067] It can be seen from Table 4 that the calculated value of the unit cost of sintering ore is U=831.188 yuan / t.
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Abstract
The invention discloses a sintering ratio calculation and sinter cost optimization method, which comprises the following steps of: establishing a linear programming model by taking cost as an optimization target according to a sintering raw material and sinter ratio relation; Acquiring test components of the sintering raw materials and calculating a mean value; Obtaining the average price of eachsintering raw material within a certain period; Inputting the TFe grade and price of each heaped iron ore into a linear programming model, and calculating an optimal solution of the sintering ratio; Inputting the test components and prices of the sintering raw materials into a linear programming model, and adjusting the proportion of the sintering solvent to minimize the cost of the sintering solvent on the premise that the alkalinity and the MgO content of the sintered ore meet the requirements; On the premise that the use amount of the sintering fuel is met, the ratio of the fuels in each pile-making sintering raw material is adjusted to minimize the cost of the sintering fuel; And inputting the result into a linear programming model to obtain the optimized cost and sintering proportionof the sintered ore. The method has the characteristics that the proportioned sinter is stable in quality, reasonable in cost control and high in calculation speed.
Description
technical field [0001] The invention belongs to the technical field of smelting, and in particular relates to a sintering ratio calculation and sintering cost optimization method with stable quality of sintered ore, reasonable cost control and fast calculation speed. Background technique [0002] Iron ore pellets refer to the spherical iron-containing raw materials that are ground into fine powder, rolled into balls, and then solidified by high-temperature roasting. The blast furnace process has always been the link that consumes the most cost in the smelting process, and its cost accounts for about 60-70% of the entire smelting process of iron and steel enterprises, and sintering production has an important impact on the entire blast furnace smelting process. Therefore, optimizing and adjusting the cost of sintering production It is the key link to reduce the cost of the blast furnace process. [0003] In sintering production, the cost is mainly composed of iron ore cost, ...
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