Method for preparing lightweight energy-saving building wall material from high-content steel slag

A high-volume, steel slag technology, applied in applications, household utensils, ceramic products, etc., can solve the problem of low utilization rate of steel slag

Inactive Publication Date: 2021-06-08
安徽马钢嘉华新型建材有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the low utilization rate of steel slag in existing wall materials, the purpose of the present invention is to provide a light-weight, high-st

Method used

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  • Method for preparing lightweight energy-saving building wall material from high-content steel slag
  • Method for preparing lightweight energy-saving building wall material from high-content steel slag

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preparation example Construction

[0070] The preparation method of grinding aid early strength agent in the embodiment, the weight portion of raw material that it comprises is:

[0071] 50 parts of triethanolamine;

[0072] 50 parts of acrylic acid;

[0073] 100 parts of water;

[0074] Include the following steps:

[0075] (1) Take the raw materials according to the proportion, put into the round bottom flask and mix evenly;

[0076] (2) Put the round-bottomed flask into a magnetic stirrer with a rotating speed of 500r / min and a temperature of 70°C, add a condensing reflux device, and react for 3h;

[0077] (3) Stop heating, continue to stir, and wait for the solution to cool down to room temperature to obtain a grinding aid early-strength agent for future use.

[0078] The obtained grinding-aid early-strength agent is measured by liquid chromatography for various substance contents, and it is calculated that in the grinding-aid early-strength agent organic matter, the ester compound accounts for 71.3% by...

Embodiment 1

[0082] Such as figure 1 As shown, the inorganic solid raw material of the present embodiment comprises 44 parts of steel slag, 8 parts of clinker, 0 part of blast furnace slag, 43 parts of fly ash, and 5 parts of desulfurized gypsum powder; 0.03%, the specific surface area of ​​the material after grinding is 520kg / m 2 Add glass fibers with a length of 4 to 6 mm for grinding, and the quality is 0.5% of the grinding material; the average diameter of bubbles in the foaming slurry is 1 mm, according to the requirements of 120 plates in GB / T23450-2009, and the dry density of the product after 28 days is ( 800±10)kg / m 3 design, adding the amount of foaming slurry and water reducer shown in Table 1; pouring; the specimens were cured at 30°C for 1 day, then removed from the mold, and then cured at 60°C for 4 days, and then transferred to After natural curing for 28 days, a qualified light-weight and energy-saving wall material can be prepared. The dry density of the product is 806k...

Embodiment 2

[0084] Such as figure 1 As shown, the inorganic solid raw material of the present embodiment comprises 43 parts of steel slag, 10 parts of clinker, 0 part of blast furnace slag, 42 parts of fly ash, and 5 parts of desulfurized gypsum powder; 0.03%, the specific surface area of ​​the material after grinding is 502kg / m 2; The average diameter of bubbles in the foaming slurry is 1mm, according to the requirements of 120 plates in GB / T23450-2009, and the dry density of the product after 28 days is (800±10)kg / m 3 Design, adding the amount of foaming slurry and water reducing amount shown in Table 1; pouring, adding three layers of glass fiber mesh cloth; the specimen was demoulded after being cured at 30°C and constant humidity for 1 day, and then kept at 55°C It was cured under wet conditions for 5 days, and then transferred to natural curing for 28 days to prepare qualified lightweight energy-saving wall materials. Product dry density is 810kg / m 3 , 28d compressive strength is...

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Abstract

The invention discloses a method for preparing a lightweight energy-saving building wall material by using high-content steel slag, and solves the problems of low utilization rate, low additional value and low consumption of the existing steel slag. The preparation method comprises the following steps: mixing 40-50 parts of steel slag, 10-20 parts of clinker, 0-20 parts of blast furnace slag, 40-50 parts of fly ash and 5 parts of desulfurized gypsum powder; performing mixing, adding 0.02-0.05% of a grinding-aid early strength agent, and performing fine grinding; adding 0-2% of reinforcing fibers into the mixture after fine grinding; mixing with foaming slurry, and adding a water reducing agent; after uniform stirring, pouring the mixture into a mold; curing the test piece for 1 day under the condition of constant humidity of 30 DEG C, performing demolding, performing curing for 3-6 days under the condition of constant humidity of 35-65 DEG C, and performing natural curing for 28 days to prepare the qualified light energy-saving wall material. The solid waste utilization rate can reach 90%, and the steel slag utilization rate can reach 42.5% or above.

Description

technical field [0001] The invention relates to a method for coupling the comprehensive utilization of metallurgical solid waste with the preparation of energy-saving building wall materials, in particular to a method for preparing light-weight energy-saving building wall materials by using high-volume steel slag. Background technique [0002] Steel slag is the waste slag produced in the steelmaking process, and its output is 12% to 15% of the crude steel output. In 2019, my country's annual output of steel slag is nearly 150 million tons, but the current comprehensive utilization rate of steel slag is less than 40%. The discharge of steel slag continues to grow, with a cumulative stockpiling of more than 1 billion tons. Its stockpiling not only occupies land, but also seriously pollutes the environment, which is the key target of national environmental protection inspection. Steel slag can be used as cement mixture, but the amount of f-CaO is limited; when used as concret...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B38/10C04B18/14C04B111/40
CPCC04B28/144C04B18/142C04B2111/40C04B2201/20C04B2201/50C04B2201/32C04B18/08C04B7/00C04B24/045C04B24/2641C04B24/122C04B24/04C04B24/14C04B16/02C04B38/10C04B14/42Y02W30/91
Inventor 雷国元王宗森魏中华郭卫东
Owner 安徽马钢嘉华新型建材有限公司
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