Titanium gypsum used in cement, and treatment method thereof by using stalk black ash

Abstract

The invention relates to titanium gypsum used in cement, and a treatment method thereof by using stalk black ash. The method comprises processes that: 1, raw materials of titanium gypsum and stalk black ash with an ignition loss higher than 1% are adopted and mixed according to a weight ratio of 75:25; 2, the materials are blended and molded, wherein one part of the titanium gypsum with a pH value reaching 9 or higher than 9 is manufactured into brick-shaped blocks by using a brick machine, and the other part of the titanium gypsum is manufactured into balls by using a disc granulator; 3, thematerial is roasted by using a brick firing kiln or a rotary kiln, wherein a sintering temperature of the material reaches 760-860 DEG C. The method is advantaged in that: when the material is used independently as a cement coagulant or used in combination with dihydrate gypsum as a cement coagulant, the hydration strength of the cement can be improved, and the setting time of the cement can be appropriately shortened. At the respect of cement setting time shortening and strength improving, in terms of a blending ratio of the treated titanium gypsum and dihydrate gypsum, the higher the proportion of the treated titanium gypsum, the higher the improving extent of the strength, and the higher the shortening extent of the setting time. No secondary pollution is caused during a production procedure.

Description

technical field [0001] The invention relates to a treatment method for titanium gypsum and straw black ash used in cement. The titanium gypsum mentioned here refers to the waste residue discharged from the production of titanium dioxide products by titanium dioxide factories. In this waste residue, in addition to containing a large amount of CaSO 4 2H 2 In addition to O, it also contains a relatively high amount of hydrated ferric sulfate or ferric hydroxide. The iron in this is mainly in the form of low-priced ferrous iron. In addition, it also contains a small amount of impurities such as titanium dioxide; the straw black ash mentioned here is Refers to the black ash with high combustible components produced during the combustion of combustible materials such as rice straw, wheat straw and other plant poles and rice husks. Here, it is referred to as straw black ash for short. The composition is equal to or greater than 10% in terms of loss on ignition. Background techni...

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Problems solved by technology

Through this way of development and application, it not only solves the problem of using titanium gypsum alone as a cement coagulant, but also solves the problem of using titanium gypsum alone as a cement coagulant. When it is used, it will be afraid to use it because of unstable quality and many disadvantages in use.

This combustible component not only acts as a fuel; but also in this environment, the ash content of the completely burned combustibles is a very useful component in the treatment of titanium gypsum, which not only solves the problem of straw black ash outlet, but more importantly Straw black ash has also become an indispensable raw material in the production of titanium gypsum

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