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Environment-friendly sludge modifier

A modifier and environment-friendly technology, applied in the direction of dehydration/drying/thickened sludge treatment, etc., can solve the problems of secondary pollution, low comprehensive utilization efficiency of metallurgical slag, high treatment cost, etc., achieve low production cost, improve treatment Good effect with disposal efficiency and product quality

Inactive Publication Date: 2010-10-20
WUHAN IRON & STEEL (GROUP) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, at present, the comprehensive utilization efficiency of metallurgical slag in iron and steel enterprises is low, the treatment cost is expensive, and secondary pollution is serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Preparation of environment-friendly sludge modifier:

[0015] (1) Weigh blast furnace slag powder, gypsum and FDN water reducer from iron and steel enterprises, and their weight percentages are 93%, 5%, and 2% respectively, and grind them finely so that the specific surface area is not less than 450m 2 / kg, and then put it in an oven and dry at 85°C for 2 hours to obtain slag composite powder for future use; (2) take steel slag from iron and steel enterprises, crush and magnetically separate it, and control its particle size to no more than 5mm to obtain steel slag for future use. (3) the slag composite powder that step (1) obtains is mixed with the steel slag that step (2) obtains, wherein the slag composite powder accounts for 15% by weight of the slag composite powder and steel slag weight sum, and steel slag accounts for slag composite powder and steel slag The weight percentage of the weight sum is 85%, and the weight percentage is dried to obtain an environment-fr...

Embodiment 2

[0019] Preparation of environment-friendly sludge modifier:

[0020] (1) Take iron and steel enterprise blast furnace slag powder, gypsum, calcium lignosulfonate water reducer and FDN water reducer, and its percentage by weight is respectively 96%, 3%, 0.3%, 0.7%, grind finely, make it compare Surface area not less than 450m 2 / kg, and then put it in an oven and dry at 85°C for 2 hours to obtain slag composite powder for future use; (2) take steel slag from iron and steel enterprises, crush and magnetically separate it, and control its particle size to no more than 5mm to obtain steel slag for future use. (3) get the slag composite powder that step (1) obtains and the steel slag that step (2) obtains and mix, wherein the slag composite powder accounts for slag composite powder and steel slag weight and percentage by weight is 50%, and steel slag accounts for slag composite powder and steel slag The weight percentage of the weight sum is 50% and dried to obtain an environment-...

Embodiment 3～5

[0024] Preparation of environment-friendly sludge modifier:

[0025] The raw materials were selected according to the corresponding raw material proportions of each embodiment in Table 2 and Table 3, and the method of Example 1 was used to prepare the environment-friendly sludge improver.

[0026] Modified sludge:

[0027] Weigh 5 Kg of the environment-friendly sludge modifiers prepared in Examples 3 to 5, respectively, and modify the sludge by the method of Example 1 to obtain the modified sludge.

[0028] Table 1

[0029]

[0030] Table 2

[0031]

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Abstract

The invention belongs to the technical field of environmental protection in metallurgy, and particularly relates to an environment-friendly sludge modifier. The environment-friendly sludge modifier is characterized by comprising the following components in percentage by weight accounting for the gross weight of the environment-friendly sludge modifier: 15 to 50 percent of slag compound powder and 50 to 85 percent of steel slag, wherein the slag compound powder is formed by finely grinding and drying blast furnace slag, gypsum and a water reducing agent, the specific surface area thereof is not lower than 450m<2> / kg, the slag compound powder comprises the following components in percentage by weight accounting for the gross weight of the slag compound powder: 93 to 99.5 percent of blast furnace slag, 0 to 5 percent of gypsum and 0.5 to 2 percent of water reducing agent, and the water reducing agent is one or the mixture of a calcium lignosulfonate water reducing agent and an FDN water reducing agent. The environment-friendly sludge modifier has low cost and good quality, and the modified sludge can satisfy the requirements of filling and rolling, i.e. the shearing force C value is not smaller than 25KN, and the internal frictional angle f value is not smaller than 30 degrees.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and environmental protection, and in particular relates to an environment-friendly sludge modifier. Background technique [0002] With the development of the economy, the content of silt has increased greatly, but due to negative factors such as high water content, high organic matter content, weak acidity and poor mechanical properties, it is difficult to utilize as a resource. An effective method of sludge treatment is: add solidifying agent to solidify the sludge in situ, and then use it as building filler. [0003] In addition, the current comprehensive utilization efficiency of metallurgical slag in iron and steel enterprises is low, the treatment cost is expensive, and secondary pollution is serious. It is of great significance if it can be effectively applied. Contents of the invention [0004] The technical problem to be solved by the invention is to provide an environment-friendly ...

Claims

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Application Information

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IPC IPC(8): C02F11/14
Inventor 朱书景方宏辉
Owner WUHAN IRON & STEEL (GROUP) CORP
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