Transmission type cement raw material on-line neutron activated sulfur alkali ratio analysis device and analysis method

Abstract

The invention relates to a transmission type cement raw material on-line neutron activated sulfur alkali ratio analysis device and an analysis method. A measuring device is a gamma detector fixed between an upper belt and a lower belt, a neutron source is placed above the upper belt and above a cement raw material, neutrons are downwards irradiated on the cement raw material on the belt to generate action with nucleus in the cement raw material, the gamma detector transforms the received ray into a pulse signal and transmits the pulse signal to a multi-channel energy spectrum analyzer to be processed, the multi-channel energy spectrum analyzer uploads effective information to an upper computer, and the upper computer calculates the sulfur alkali ratio of the cement raw material according to the corresponding formula. The sulfur alkali ratio finally obtained by calculation is a ratio relation between SO3 content and the sum of K2O content and Na2O content, so the sulfur alkali ratio is not influenced by the total amount of the cement raw material on the belt; the overall shielding protection of the instrument adopts a two-layer structure, the inner layer is lead and the outer layer is polyethylene, so the use amount of the lead is reduced, and the cost and the weight of the instrument are reduced; and a detector shielding body adopts a two-layer structure, the outer layer is polyethylene and the inner layer is a cadmium plate, so the influence on the gamma detector by the neutrons is minimized, and the analysis precision of the instrument is improved.

Description

technical field [0001] The invention relates to an online neutron activation analysis device and a use method thereof, in particular to a transmission type cement raw material online neutron activation sulfur-alkaline ratio analysis device and a use method. Background technique [0002] In the new dry production calcination system of cement production, the sulfur brought in by the raw meal can be combined with alkali to form alkali sulfate, which is fixed in the clinker and discharged out of the kiln with the clinker. However, if the sulfur content exceeds the amount that the alkali can combine quantity, it will form CaSO with CaO in the raw meal 4 or with C 2 S forms calcium sulfosilicate (2C 2 S·CaSO 4 ) resulting in a crust. In addition, the part of the sulfur-containing gas produced during the calcination process that is not absorbed by the alkaline components will be discharged with the flue gas, which will also pollute the environment. Therefore, controlling the c...

AI Technical Summary

Problems solved by technology

[0004] However, the sulfur-alkali ratio of cement raw meal is obtained through manual sampling to the laboratory through chemical analysis and calculation. In the process, there are also processes such as drying, grinding, and screening. When the final alkalinity value comes out, it is already several After hour

Images