Limestone mine tailing dolomite cement production batching method

Abstract

The invention provides a limestone mine tailing dolomite cement production batching method which comprises the following steps: drilling and sampling before exploitation, detecting the content of MgOin mineral aggregate, dividing sampling points with the MgO content difference exceeding 0.5% into different areas, and exploiting in different areas; respectively crushing the ores in each area by adopting a hammer crusher; and piling and storing in a homogenizing stock bin by adopting a round pile, determining the size and height of the round pile according to the treatment capacity of one day of cement production, and calculating the proportion of mineral aggregate in each area mined in different areas in the round pile according to a detection result, so that the MgO content in the piled round pile is not more than 2.7%. According to the invention, the component uniformity of each batch of raw materials in the cement production process is ensured, the influence of the loading speed onthe batching uniformity is avoided, the percent of pass of the cement raw materials is increased from 65% to 88% or above, and the percent of pass of cement is increased; in addition, the utilizationrate of dolomite is increased, the mining cost is reduced, and the environment is protected.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of dolomite; in particular, it relates to a method for using limestone mine tailings dolomite as ingredients in cement production. Background technique [0002] Limestone ore is a kind of sedimentary rock, its mineral composition is mainly CaCO3, it is often used as building materials, and it is also an important raw material for many industries. In the mining of limestone, a large amount of dolomite is often associated with it, resulting in more impurities in the mineral. Dolomite is an ore similar to limestone, but its composition is quite different. Dolomite contains a large amount of unstable component MgO, and the content of MgO in dolomite in most mining areas is between 3% and 27%. The collected limestone is used to produce cement. When the content of MgO in the raw material exceeds 3%, it is easy to cause the quality of the cement to be unqualified. At the same time, be...

AI Technical Summary

Problems solved by technology

However, in the actual operation, the batching by car is used, and the ore is transported into the homogenization silo for storage according to the calculated ratio. During the transfer process, due to the different speeds of the loading and unloading trucks, the detection ratio of MgO in some storage areas reaches 6-8%. As a result, the qualified rate of cement is greatly reduced. When sampling and testing the raw material warehouse, the qualified rate is only about 65%.

And dolomite is mixed according to the original method, the utilization rate of dolomite is still low, and the discarded material rate cannot be reduced to below 10%. The disposal of a large number of collected dolomite not only causes waste of mining manpower and material resources, but also causes waste of resources and environmental pollution.