Process system for improving limestone quality of cement production line

Abstract

The invention introduces a process system for improving the limestone quality of a cement production line, the process system comprises a crushing system, a desilting system and a water spraying system, the crushing system comprises a plate feeder, a crusher, a first belt conveyor, a dust remover, a dust removal fan, a dehydration sieve shaker and a second belt conveyor; the desilting system comprises a first slurry pump, a cyclone group, a concentration tank, a flocculation automatic dosing machine, a second slurry pump, a filter press, a clean water tank and a clean water pump; the water spraying system comprises a pre-filter, an electric ball valve, a water tank, a water pump, a valve group and a nozzle. Products such as stone chips, mud cakes and clear water in the process system all enter a production system of a cement plant to be recycled, internal circulation of production is achieved, and energy conservation and emission reduction are achieved; the water spraying system ensures the production indexes of limestone products, the quality of the limestone products is accurately controlled, the stable quality of the whole production line is ensured, the cement mark number and the product quality are improved, and the economic benefits of a cement plant are improved.

Description

Technical field [0001] The invention involves the field of cement production technology, and specially involves a process system that improves the quality of limestone in cement production lines. Background technique [0002] In the production of cement, limestone is the main raw material for production of cement.In the cement ingredients, limestone accounts for about 80%of the proportion of cement raw materials. The quality of limestone is good or bad, which directly affects the quality of cement clinkers.The design specifications of the GB50295-2016 Cement Factory are specified. The quality requirements for limestone are: calcium oxide (CAO)> 48%, magnesium oxide (MGO) <3%, alkali (K2O+NA2O) <0.6%, sulfur oxide (SO3)<0.5%, free calcium oxide (F-SO2) <8%(quartz) or <4%(venoma), chloride (CL-) <0.03%, five phosphorus (P2O5) <0.8%; butIn actual production, limestone contains a large amount of cylinder and other impurities. Especially in the rainy season in ...

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Problems solved by technology

In the GB50295-2016 cement plant design specification, the quality requirements for limestone are: calcium oxide (CaO) > 48%, magnesium oxide (MgO) < 3%, alkali (K2O+Na2O) < 0.6%, sulfur trioxide (SO3) <0.5%, free calcium oxide (f-SO2) <8% (quartz) or <4% (chert), chloride ion (Cl-) <0.03%, phosphorus pentoxide (P2O5) <0.8%; but In actual production, limestone contains a large amount of impurities such as clay, especially in the rainy season in the south, limestone contains a large amount of mud, water and other substances, resulting in unqualified quality indicators of limestone, especially laboratory indicators such as calcium oxide; Moreover, the content of impurities in each car is not uniform, and there is no way to adjust it through the later batching; or the later batching adjustment is not stable, resulting in unqualified or unstable quality of the fired cement clinker, resulting in cement grinding system. The amount of industrial waste such as slag is low, and the cement is shipped with a lower label, which affects the economic benefits of cement enterprises

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