Method for producing high-strength clinker from high-magnesium limestone

Abstract

The invention relates to a method for producing high-strength clinker from high-magnesium limestone. The method uses the following raw materials in parts by weight: 50-70 g of sulfuric acid slag, 80-200 g of high-magnesium limestone, 600-760 g of low-magnesium limestone, 20-40 g of shale, 20-40 g of sandstone and 20-30 g of coal gangue, summing to 1000 g. According to the invention, the high-magnesium limestone is adopted to replace part of low-magnesium high-calcium high-quality limestone, the coal gangue is added, and the values of the three rates of the clinker are reformulated. Compared with the composition of traditional silicate clinker, the invention has the following advantages: the high-magnesium limestone and the coal gangue are used as substitute materials, so a clinker firing temperature is easily reduced, the burnability of the clinker is improved, and the energy consumption of the clinker is reduced; and since high-magnesium limestone resources and waste coal gangue of amine are effectively utilized, resource problems and environmental pollution problems are solved, a way is found for improving the ecological environment, and high social benefits and environmental benefits are achieved.

Description

Technical field [0001] The invention relates to the technical field of high-magnesium limestone production, in particular to a method for producing high-strength clinker from high-magnesium limestone. Background technique [0002] At present, low-magnesium, high-calcium, high-quality limestone is commonly used as the limestone material in the domestic silicate clinker preparation process. This high-quality limestone has higher requirements for mines. With the increase in dosage, the supply of low-magnesium and high-calcium limestone is increasing. Tension, rising corporate costs, and unsustainable production in some companies. [0003] High-magnesium limestone is used as a raw ore in limestone mines, with a MgO content of 3%-15%. In the mining process of cement enterprises, mines are generally used as waste ore or only for aggregate production, which is wasteful and is not conducive to comprehensive utilization of resources. Some enterprises use part of high-magnesium limestone in...

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Problems solved by technology

[0002] At present, low-magnesium and high-calcium high-quality limestone is generally used as limestone in the domestic silicate clinker preparation process. This kind of high-quality limestone has high requirements for mines. With the increase of consumption, the supply of low-magnesium and high-calcium limestone is increasing. Nervous, business costs are rising, and some companies are struggling to sustain production

[0003] High-magnesium limestone is used as a raw ore in limestone mines, and its MgO content is 3%-15%. During the mining process of cement enterprises, it is generally used as waste ore or only used for aggregate production, which is a serious waste and is not conducive to the comprehensive utilization of resources.

Some enterprises use some high-magnesia limestone in the production process, but kiln production process failures occur frequently, clinker energy consumption is high, clinker strength is lower than 50MPa, and the 28-day strength of cement cannot be guaranteed

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