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Method for preparing cement additive by taking titanium gypsum as raw material

A technology of cement additive and titanium gypsum, which is applied in the field of building materials, can solve the problems of large economic burden, environmental pollution, occupation, etc., and achieve the effects of reducing industrial waste residue, improving the fixation effect, and improving the reaction effect

Inactive Publication Date: 2018-12-14
DANYANG LANSI INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The discharge of titanium gypsum not only occupies a large amount of land and pollutes the environment, but also causes a great economic burden to titanium dioxide enterprises

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of method that raw material prepares cement additive with titanium gypsum, comprises the following steps:

[0030] A. After mixing titanium gypsum, caustic white mud slag and a small amount of graphene in proportion, carry out wet grinding in a cement ball mill for 2.5 hours;

[0031] B. Pour into an extruder and extrude into bricks;

[0032] C. Natural stacking for 4 days;

[0033] The titanium gypsum and causticizing white mud slag in the step A need to be pretreated before being mixed, and the water content is controlled at 15-25%;

[0034] In the step A, the weight ratio of titanium gypsum and caustic white mud slag is calculated as 2:1 in dry weight;

[0035] In the step A, the added amount of the graphene is calculated as dry weight: 0.02‰ of the weight of titanium gypsum and caustic white mud slag.

Embodiment 2

[0037] A kind of method that raw material prepares cement additive with titanium gypsum, comprises the following steps:

[0038] A. After mixing titanium gypsum, caustic white mud slag and a small amount of graphene in proportion, carry out wet grinding in a cement ball mill for 2 hours;

[0039] B. Pour into an extruder and extrude into bricks;

[0040] C. Natural stacking for 5 days;

[0041] Before the titanium gypsum and causticizing white mud slag in the described step A are mixed, they need to be pretreated to control their water content at 15%;

[0042] In the step A, the weight ratio of titanium gypsum and caustic white mud slag is calculated as: 3:1 in dry weight;

[0043] In the step A, the added amount of the graphene is calculated as dry weight: 0.01‰ of the weight of titanium gypsum and caustic white mud slag.

Embodiment 3

[0045] A kind of method that raw material prepares cement additive with titanium gypsum, comprises the following steps:

[0046] A. After mixing titanium gypsum, caustic white mud slag and a small amount of graphene in proportion, carry out wet grinding in a cement ball mill for 3 hours;

[0047] B. Pour into an extruder and extrude into bricks;

[0048] C. Natural stacking for 3 days;

[0049] Before the titanium gypsum and causticizing white mud slag in the described step A are mixed, they need to be pretreated to control their water content at 25%;

[0050] In the step A, the weight ratio of titanium gypsum and caustic white mud slag is calculated as 1.5:1 in dry weight;

[0051] In the step A, the added amount of the graphene is calculated as dry weight: 0.03‰ of the weight of titanium gypsum and caustic white mud slag.

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Abstract

The invention provides a method for preparing a cement additive by taking titanium gypsum as the raw material. The main raw materials comprise titanium gypsum and causticized white sludge; titanium gypsum and causticized white sludge are by-products of chemical production and are mixed, so that industrial waste residue can be reduced, and acid-base neutralization can be realized to fix heavy metalelements including lead, zinc, copper, cadmium, mercury, arsenic, chromium and the like in titanium gypsum; trace graphene is added and ground to improve the reaction effect of titanium gypsum and causticized white sludge and improve the fixing effect of the heavy metal elements; after grinding, the mixture is poured in an extruding machine to be extruded into brick fragments; the material required by forming has low water content requirement and is then naturally piled and aired to be normally transported and meet the unloading requirement of a cement plant.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a method for preparing cement additives from titanium gypsum. Background technique [0002] Titanium gypsum is a waste residue mainly composed of dihydrate gypsum produced by adding lime (or carbide slag) to neutralize a large amount of acid wastewater in order to treat acid wastewater when sulfuric acid method is used to produce titanium dioxide. [0003] In recent years, in the non-ferrous smelting sewage treatment process, the lime / calcium carbide mud method is used as the arsenic removal agent, and the polymerized ferric sulfate is used as the flocculant. Colloids containing ferric hydroxide are produced, and the arsenate and ferric hydroxide in the solution can also undergo adsorption and co-precipitation. After pressure filtration, it becomes viscous sludge, which is red or yellow due to containing ferric ions, and is generally called red Mud, yellow mud or waste gypsum, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/14
CPCC04B40/0039C04B22/146C04B22/10C04B22/14C04B14/024
Inventor 王小玲
Owner DANYANG LANSI INFORMATION TECH CO LTD
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