Chain grate-rotary kiln pellet burn-up control method and device
A technology of chain grate and rotary kiln, applied in the field of metallurgy, can solve the problems of fuel waste cost, fuel waste, inability to change production conditions, etc.
Active Publication Date: 2017-08-11
ZHONGYE-CHANGTIAN INT ENG CO LTD
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Problems solved by technology
In the existing technology, the amount of fuel that should be needed is often estimated based on the situation of the raw materials based on experience. Not only is the accuracy not high, it is relatively extensive, but also the timeliness is poor, and it is impossible to respond to changes in production conditions in time, so it is easy to cause fuel shortage. waste (the fuel ratio is too large) or the pellets are not burned through (the fuel ratio is too small), and sometimes in order to avoid the occurrence of the pellets not being burned through, the fuel ratio is deliberately designed to be too large, which is even more Resulting in wasted fuel and increased costs
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[0139] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.
[0140] figure 1 It is a flow chart of a grate-rotary kiln pellet fuel consumption control method shown according to an exemplary embodiment. This method can be used in the process of producing iron ore oxide pellets using the grate machine-rotary kiln method, which can be found in figure 2 as shown, figure 2 It is a schematic diagram of equipment for the grate-rotary kiln oxidation pellet p...
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The embodiment of the invention provides a chain grate-rotary kiln pellet burn-up control method and device. The method comprises the steps that i) the estimation value G1 of fuel required for pellet combustion is acquired; ii) the actual combustion heat release value Q7 of the fuel is acquired according to G1, the technology and environment condition parameters of pellet combustion and the heat balance formula; iii) the actual consumption value G2 of the fuel is acquired according to Q7; iv) whether G2 and G1 are equal is judged; v) if the judgment result is no, G2 is assigned to G1 and the steps ii)-v) are repeated until G2 and G1 are equal; and vi) the fuel is controlled according to G2. The pellet fuel proportioning amount under the premise of guaranteeing the quality index of the finished pellet ore is calculated according to the material balance and the heat balance of the pellet production process, and the burn-up is accurately controlled according to the result of recursive calculation so as to achieve the effects of cost reduction and energy saving and environmental protection.
Description
technical field [0001] The invention relates to the technical field of metallurgy, in particular to a grate-rotary kiln pellet fuel consumption control method and device. Background technique [0002] In the iron and steel industry, iron ore oxidized pellets are an important blast furnace charge, and its production technology is the development direction of optimizing the blast furnace charge structure. The production process of oxidized pellets generally includes: firstly, raw materials such as mixed concentrate and fuel such as coal powder are made into green pellets with uniform viscosity and sufficient strength, and after drying and preheating, they are roasted in an oxidizing atmosphere such as a rotary kiln. Agglomerates the green pellets to produce finished pellets. [0003] Today, when energy conservation and emission reduction are advocated, how to reduce fuel consumption in the production of oxidized pellets has become an urgent problem to be solved. In the exist...
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IPC IPC(8): G05B19/418
CPCY02P90/02G05B19/41875
Inventor 曾辉孙英
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD