High temperature-resistant micro-expansive caulking mud and preparation method thereof

A micro-expansion, high-temperature-resistant technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of secondary pollution, high cost of blasting clay, and non-expansion of blasting clay, so as to reduce the blast furnace Production cost, improvement of secondary pollution, and the effect of promoting environmental protection

Inactive Publication Date: 2015-07-22
BAOSTEEL STAINLESS STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing deficiencies are: (1) Use the gun mud of the blast furnace iron hole for caulking, because the gun mud contains tar, and the chemical substances released after heating and baking will cause secondary pollution
(2) The gunpowder has no expansibility and slightly shrinks. After being hardened by high temperature, it is easy to fall off from the gap, and the use effect is poor.
(3) The cost of gun mud is high (5000-10000 yuan / t), and it is a serious waste to fill the gaps in the cover plate

Method used

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  • High temperature-resistant micro-expansive caulking mud and preparation method thereof

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preparation example Construction

[0026] The above-mentioned high-temperature-resistant micro-expansion caulking mud has high strength, can avoid secondary pollution, is not easy to fall off, and has low cost. Such as figure 1 Shown, the preparation method of high temperature resistant micro-expansion caulking mud of the present invention comprises 5 main steps:

[0027] S1: Dissolve baking soda powder in water, take its saturated solution as swelling agent.

[0028] S2: Grinding the bauxite clinker, clay, slag fine powder and alum to the standard size range respectively.

[0029] S3: Bauxite clinker 50-60%, clay 20-30%, slag fine powder 10-20%, alum 2-6%, expansion agent 1-3%.

[0030] S4: maintaining the preparation temperature below 30°C.

[0031] S5: Add an expansion agent solution to the bauxite clinker, clay, slag fine powder, and alum and stir.

[0032] The details of the five steps are described below.

[0033] (1) The principle of micro-expansion: NaHCO in the expansion agent 3 Chemical reaction...

Embodiment 1

[0051] The first group A: Bauxite 56%, clay 26%, slag fine powder 15%, alum 2%, expansion agent 1%.

[0052] (1) Dissolve baking soda powder into pure water at 20-30°C, with a weight ratio of 1.5:10, stir for 5-10 minutes to obtain a saturated solution, and let stand for more than 15 minutes.

[0053] (2) After crushing bauxite, clay, slag fine powder and alum, grind them to the particle size range required in Table 3.

[0054] (3) According to the weight ratio of each raw material in the first group A in Table 4, weigh and put it into the stirring equipment, and the stirring time is 5-10 minutes.

[0055] (4) Weigh 1% expansion agent and stir for 10-15 minutes.

[0056] (5) Packed into bags, it is a finished product.

[0057] (6) Repeat steps (3)-(5) according to the proportion of the second group B and the third group C.

[0058] (7) After baking the caulking mud to 200°C for 2 hours, test its physical properties:

[0059] project

Embodiment 2

[0061] The second group B: bauxite 55%, clay 24%, slag fine powder 15%, alum 4%, expansion agent 2%.

[0062] (1) Dissolve baking soda powder into pure water at 20-30°C, with a weight ratio of 1.5:10, stir for 5-10 minutes to obtain a saturated solution, and let stand for more than 15 minutes.

[0063] (2) After crushing bauxite, clay, slag fine powder and alum, grind them to the particle size range required in Table 3.

[0064] (3) According to the weight ratio of each raw material in the first group A in Table 4, weigh and put it into the stirring equipment, and the stirring time is 5-10 minutes.

[0065] (4) Weigh 1% expansion agent and stir for 10-15 minutes.

[0066] (5) Packed into bags, it is a finished product.

[0067] (6) Repeat steps (3)-(5) according to the proportion of the second group B and the third group C.

[0068] (7) After baking the caulking mud to 200°C for 2 hours, test its physical properties:

[0069] project

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Abstract

The invention discloses a high temperature-resistant micro-expansive caulking mud and a preparation method thereof. The preparation method comprises the following steps: step 1, dissolving sodium bicarbonate powder in water and taking a saturated solution of the dissolved sodium bicarbonate as an expanding agent; step 2, separately grinding 50 to 60% of bauxitic clay clinker, 20 to 30% of clay, 10 to 20% of fine slag powder and 2 to 6% of alum to respective standard particle size ranges; and step 3, adding the expanding agent solution containing 1 to 3% of sodium bicarbonate into bauxitic clay clinker, clay, fine slag powder and alum and carrying out stirring. With such a technical scheme, defects of secondary pollution, easy falling and high cost of conventional stemming caulking technology are overcome, and the caulking mud provided by the invention has high strength and can meet requirements on caulking of joints of cover plates. The production cost of the caulking mud provided by the invention is 1/3 of the production cost of the stemming, so blast furnace production cost is reduced; moreover, the caulking mud does not cause secondary pollution, thereby substantially promoting environmental protection.

Description

technical field [0001] The invention relates to a technology for treating slag and iron in front of a blast furnace, and more specifically relates to a high-temperature-resistant micro-expansion caulking mud and a preparation method thereof. Background technique [0002] Both the slag ditch and the iron ditch of the blast furnace are covered with refractory material poured on the steel shell, and dust suction points are set on the slag ditch and the iron ditch to suck away the smoke and dust generated by the slag and iron ditch. There is a plane butt joint between the cover plates. Due to the harsh working environment of the slag-iron ditch, which belongs to the high-temperature area, the cover plates are easily deformed and the paving is difficult, resulting in a certain gap between the cover plates and some smoke and dust. Escaping from the gap, it cannot be dusted, which not only pollutes the environment, but also reduces the efficiency of the dust collector and wastes re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B14/10C04B18/10
CPCY02W30/91
Inventor 储滨陆俊辉徐振忠
Owner BAOSTEEL STAINLESS STEEL
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