Horizontal type screw settling centrifuge product-enlarging method

The invention provides a production capacity expanding method for a horizontal decanter centrifuge. After the completion of chemical combination, the liquid is separated by the horizontal decanter centrifuge; the rotation speed of the horizontal decanter centrifuge is 1,800rpm and the current is 30A; after separation, the obtained filtrate is clarified for twice by a clarifying tank and after two clarifications, the obtained barium mud therefrom is returned to an inlet of the horizontal decanter centrifuge for a second separation; the whole process is a closed circulation. By adopting the method, the filtrate is clarified continuously without increasing energy consumption, therefore, the increase of wet content does no influence the production and the barium content of the obtained product is superior to that obtained by the original technology; furthermore, the production capacity is doubled and the facility is reduced, thus saving the investment and the freight as well as having remarkable economic benefit.