A method for comprehensive utilization of low-grade magnesite
A magnesite and low-grade technology, applied in the field of low-grade magnesite product utilization, can solve the problems of large waste, serious pollution, low utilization degree and utilization rate, etc., and achieve the effect of huge economic effect.
Active Publication Date: 2021-09-03
王选福 +2
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Problems solved by technology
In short, this method of comprehensive utilization of low-grade magnesite has enabled low-grade magnesite to be applied to a certain extent, but its utilization degree and utilization rate are still relatively low; more importantly, the vacancy rate of product quality is also relatively low
[0004] It can be seen that in the prior art, there are problems such as low product quality, serious pollution, and large waste in the processing technology of low-grade magnesite
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[0018] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0019] figure 1 It is a schematic flow chart of the comprehensive utilization method of low-grade magnesite in the present invention. figure 2 It is a schematic diagram of the process framework for the comprehensive utilization of low-grade magnesite in the present invention. Such as figure 1 , figure 2 Shown, a kind of low-grade magnesite comprehensive utilization method of the present invention comprises the steps:
[0020] Step 1. In the flash kiln, the high-temperature gas from the reduction furnace is used as the combustible gas, and the mixed gas of the cooled flue gas and oxygen from the carbon dioxide storage tank is used as the combustion aid. Low-grade magnesite is roasted to obtain lightly burned powder and high-temperatu...
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Abstract
The invention provides a method for comprehensive utilization of low-grade magnesite, comprising the steps of: roasting the pretreated low-grade magnesite in a flash kiln; sending the high-temperature flue gas obtained from the roasting to a waste heat boiler to provide heat energy for power generation, On the other hand, it is used as the raw material of combustion aid or other raw materials used in other processes; the light-burned powder obtained by roasting is physically selected according to the content of magnesium oxide, and the light-burned powder after material selection and classification is transported to mid-range kiln, soda ash process, light carbonic acid Magnesium production process and corrugated magnesium board process are used as raw materials for production; carbon dioxide produced by mid-range kilns is reduced, and the obtained gas is used as fuel on the one hand, and sent to waste heat boilers to provide heat energy for power generation on the other hand. The invention provides a method for comprehensive utilization of low-grade magnesite, which has the characteristics of high product quality, very low pollution, high degree of energy saving, effective utilization of low-grade mineral resources, huge economic benefits, etc., and can be widely used in the field of mineral products.
Description
technical field [0001] The invention relates to the technical field of utilization of low-grade magnesite products, in particular to a comprehensive utilization method of low-grade magnesite. Background technique [0002] At present, magnesite, which belongs to special mineral resources, has been mined for a long time, and its reserves have been greatly reduced. Moreover, for the processing of magnesite, the traditional way is to discard the poor and use the rich, which makes a large amount of low-grade magnesite discarded. The tailings after beneficiation have caused waste of resources and new pollution, and even encroached on farmland or forests. In addition, due to the relatively backward traditional technology, there are still problems such as uncontrollable product quality, high labor intensity of operators, and poor energy-saving effect during the processing of magnesite. [0003] In the Chinese invention patent with the application number "201710584845.3" and the na...
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IPC IPC(8): C04B2/10C01F5/24C01D7/00C01B32/50C05D7/00F22B1/18C10L3/08
CPCC01D7/00C01F5/24C01P2006/80C04B2/102C04B2/108C05D7/00C10L3/08C01B32/50F22B1/1807Y02E20/30Y02P20/10Y02P20/129
Inventor 王选福吴建国邓守国
Owner 王选福