A kind of method of preparing cement retarder with titanium gypsum
A technology of cement retarder and titanium gypsum is applied in the field of preparing cement retarder from titanium gypsum, which can solve the problems of difficult disk-forming of titanium gypsum, the need to dry titanium gypsum, and the rising cost, so as to avoid drying titanium gypsum. Process, strength increase, effect of reducing production cost
Active Publication Date: 2016-07-13
TONGLING CHEM IND GRP
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[0003] The purpose of the present invention is to provide a method for preparing cement retarder with titanium gypsum, so as to solve the problem that titanium gypsum is difficult to form pellets due to its muddy shape, or the titanium gypsum needs to be dried when extruded into balls, the cost rises, and no economic problems
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[0014] The titanium gypsum used in the present invention is the titanium gypsum produced by Anhui Ananda Titanium Industry Co., Ltd. to process the wastewater discharged during the production of titanium dioxide. The titanium gypsum has a water content of 45%. The specific ingredients of the titanium gypsum (dry basis) are as follows:
[0015] CaO: 28%, SO 3 :37%,Al 2 o 3 :2.2%,Fe 2 o 3 :8.5%,MgO:0.8%
[0016] The phosphogypsum used in the present invention is the phosphogypsum produced in the wet-process phosphoric acid production process of Anhui Liuguo Chemical Industry Co., Ltd., the moisture content of the phosphogypsum is 15%, and the specific components of the phosphogypsum are as follows:
[0017] CaO: 29.22%, SO 3 :44.10%,P 2 o 5 : 1.02%, F: 1.28%, SiO 2 :2.51%,Al 2 o 3 :0.81%,Fe 2 o 3 : 1.05%, MgO: 1.37%, Na 2 O: 0.36%
[0018] Each embodiment of the present invention is carried out according to the following technological process: titanium gypsum, phos...
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Abstract
The invention discloses a method for preparing a cement retarder by using titanium gypsum. The method comprises stirring and mixing titanium gypsum, phosphogypsum, silicon-aluminum substances, and quicklime in proportion, extruding it into bricks with an extruder, and aging for three days. Obtain cement retarder product; Wherein, the weight proportion of titanium gypsum and phosphogypsum is controlled in the scope of 18~25% according to the water content after both are mixed and determines, and the weight of silicon-alumina material is the total weight of titanium gypsum and phosphogypsum 2-6%, the weight of quicklime is 6% of the total weight of titanium gypsum and phosphogypsum. The present invention selects the process of extruding into bricks, and uses phosphogypsum with a lower moisture content to reduce the moisture content of titanium gypsum, thus avoiding the drying process of titanium gypsum. The process is simple, the production cost is low, and the strength of the formed bricks is increased. It can better meet the requirements of product transportation and cement plant blanking, and has a very broad application prospect.
Description
technical field [0001] The invention relates to a method for preparing cement retarder by using titanium gypsum. Background technique [0002] Titanium gypsum is a muddy waste residue obtained from the treatment of wastewater discharged during the production of titanium dioxide, with a high moisture content of 40-60%. Nearly 7 tons of titanium gypsum are produced per ton of titanium dioxide. With the development of the titanium dioxide industry, a large amount of titanium gypsum has been produced in China. The titanium dioxide production capacity of Ananda Titanium Industry Company of Tongling Chemical Group alone is 80,000 to 100,000 tons per year, and the amount of titanium gypsum slag will reach 560,000 to 700,000 tons per year. If such a large amount of neutralized slag cannot be fully utilized, it will bring great environmental protection pressure to the enterprise. Because titanium gypsum has a high water content (about 45%), it is muddy and difficult to disperse, so...
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IPC IPC(8): C04B22/16C04B22/14C04B22/06C04B103/22
Inventor 胡成军石庆忠潘建罗根宏姜跃孙荣
Owner TONGLING CHEM IND GRP