Method for curing sludge and sludge curing agent using titanium extracting slag

Abstract

The invention provides a method for curing sludge and a sludge curing agent using titanium extracting slag. The curing agent is prepared from the following raw materials in parts by mass: 25 to 50 parts of titanium extracting slag, 12 to 26 parts of lime, 0 to 18 parts of metakaolin, 10 to 30 parts of steel slag micro powder, 1 to 3 parts of excitant and 0.1 to 0.5 part of acrylate. The method forcuring sludge comprises the following step of curing the sludge by adopting the sludge curing agent. The method has the beneficial effects that the titanium extracting slag is taken as the main raw material of the curing agent, so that reasonable utilization of industrial solid waste materials can be realized. The best curing effect can be achieved by adjusting the adding amount of the curing agent according to the organic matter content, porous ratio and water content of the sludge to be cured. The curing agent has the advantages of low curing cost, high sludge strength after curing and highwater stability, can be applied to engineering backfill and the like, and has good economical benefits and high practical value.

Description

technical field [0001] The invention relates to the field of environmental treatment and resource regeneration, in particular to a sludge solidifying agent using titanium slag extraction and a method for solidifying sludge. Background technique [0002] As the world-famous capital of vanadium and titanium, Panzhihua is rich in vanadium-titanium magnetite resources, among which TiO2 reserves are as high as 130 million tons, accounting for more than 90% of the known domestic reserves and more than 1 / 3 of the world's proven reserves , ranking first in the country. Under Panzhihua Iron and Steel's current smelting technology conditions, about 50% of the titanium resources in the raw ore enter the blast furnace slag, forming Panzhihua Iron and Steel's unique titanium-containing blast furnace slag. The speed increase of more than 10,000 tons is Panzhihua Iron and Steel Co., Ltd., which is also a unique secondary titanium resource in my country. [0003] In order to effectively ut...

AI Technical Summary

Problems solved by technology

However, while recovering the titanium resources, a large amount of chlorine-containing tailing slag—titanium extraction slag is produced. Due to the low-temperature selective chlorination, the slag contains about 2% to 7% chloride, far exceeding the current industry standard "for Granulated blast furnace slag powder in cement, mortar and concrete" (GBT 18046-2017) requires that the chloride ion content is not higher than 0.06% (mass fraction), so it cannot be directly used in cement and concrete like ordinary blast furnace slag. It can only be piled up for treatment, and the piled up titanium slag not only takes up a lot of land resources, but also takes up valuable land resources, and also causes serious pollution to the surrounding environment, which brings huge environmental pressure to the enterprise, seriously affects and restricts Related industry development