The calcium and magnesium content of slaked lime is regulated

EDTA coordination titration was used.

The sample is decomposed with dilute hydrochloric acid to prepare a sample solution. Under the condition of pH greater than 13, CMP was used as an indicator to titrate calcium with EDTA coordination. Under the condition of pH=10, the calcium-magnesium compound was titrated with EDTA coordination with Kb as the indicator, and the magnesium content was calculated by differential subtraction.

Of course, other indicators can be used.

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Summary. Hello dear <>

We are happy to serve you: the calcium and magnesium content of 12% lime-stabilized soil to lime is 58%; Jingcheng quicklime was used, and after full digestion, the calcium and magnesium content of slaked lime was 58%, which belonged to grade III ash; Water: Drinking water for humans and animals Compressive strength:

7-day immersion intensity. Quicklime quicklime should generally be made of dish-grade ash and qualified by the test, and the effective calcium and magnesium (CaO+MGO) content should not be less than 70%. Quicklime should be properly kept, and the storage time should be shortened as much as possible in use.

The above is my and advice, I hope it can help you, I wish you a happy life.

Calcium and magnesium content of 12% lime-stabilized soil to lime.

Hello dear <>

We are happy to serve you: the calcium and magnesium content of 12% lime-stabilized soil to lime is 58%; Jingcheng quicklime was used, and after full digestion, the calcium and magnesium content of slaked lime was 58%, which belonged to grade III ash; Water: Drinking water for humans and animals Compressive strength:

7-day immersion intensity. Quicklime quicklime should generally be made of dish-grade ash and passed the test, and the content of positive or effective calcium and magnesium (CAO+MGO) should not be less than 70%. Quicklime should be properly kept, and the storage time should be shortened as much as possible in use.

The above is my and advice, Qinglv hopes to help you, I wish you a happy life.

The technical specifications are that.

Hello [happy late], I am happy to serve you: ISO 6059-1984 "Water quality - Determination of total calcium and magnesium - EDTA titration".

Legal Analysis: 3 1 Classification.

The magnesium content of calcareous slaked lime powder is less than 4; The magnesium oxide content of magnesia slaked lime powder is equal to 4 to less than 24 in the large limb mold; Dolomite elimination.

The magnesium oxide content of lime powder is equal to more than 24 to less than 30.

3 2 levels.

Building slaked lime powder is an excellent product, a first-class product, and a qualified product.

Legal basis: State Building Materials Industry Bureau, "Building Materials Industry Standard of the People's Republic of China" JC T481-92 I. Subject content and scope of application.

This standard specifies the classification, grade, technical requirements, test methods, inspection rules, packaging, marking, transportation and storage of slaked lime powder for construction.

This standard is applicable to the construction slaked lime powder prepared by hydration and processing with building quicklime as raw material. Other uses of slaked lime powder also.

It can be used as a reference.

Summary. I have helped you find the results; Limestone burnt lime should not contain more than 1 percent magnesium. In the process of limestone firing, due to the low silicon content of limestone, the product quality and use performance cannot be affected.

Magnesium contained in limestone generally occurs in the form of magnesium oxide, which is mixed with lime powder to produce white soot. If the magnesium content in limestone exceeds 1%, it will reduce the activity of lime powder, deteriorate the weather resistance, reduce durability, reduce the strength of cement, increase the salt content of light sand, and other adverse effects.

I have helped you find the results; Limestone burnt lime should not contain more than 1 percent magnesium. In the process of limestone firing, due to the low silicon content of limestone, Zheng Buliang can not affect the quality of the product and the performance of use. The magnesium contained in limestone generally appears in the form of magnesium oxide, which is mixed with lime powder to produce white soot.

If the magnesium content in limestone exceeds 1%, the activity of lime powder will be reduced, the weather resistance will deteriorate, the durability will be reduced, the strength of cement will be reduced, and the salt content of light sand will increase.

If the magnesium content of limestone is high, what should the burned lime do to make aerated bricks?

When the limestone has high magnesium content, the impact of fired lime on aerated bricks is mainly in two aspects: one is to affect the appearance of the material, and the lime with high magnesium content is easy to form green columns, which will affect the appearance of aerated bricks; The second is to affect the performance of the material, with the increase of magnesium content, the setting temperature of lime decreases, but the shrinkage rate during crystallization and the compressive strength of lime may decrease, reducing the solidity and durability of aerated bricks. In addition, lime and magnesium can be mixed to expand the magnesium content and control the amount used, resulting in ideal aerated brick production.

At the same time, attention should also be paid to controlling the firing time to prevent the green column from turning black, so as to reduce the influence of fine particle composition inside the aerated brick.

When the limestone has high magnesium content, the impact of fired lime on aerated bricks is mainly in two aspects: one is to affect the appearance of the material, and the lime with high magnesium content is easy to form green columns, which will affect the appearance of aerated bricks; The second is to affect the performance of the material, with the increase of magnesium content, the setting temperature of lime decreases, but the shrinkage rate during crystallization and the compressive strength of lime may decrease, reducing the solidity and durability of aerated bricks. In addition, lime and magnesium can be mixed to expand the magnesium content and control the amount used, resulting in ideal aerated brick production.

At the same time, attention should also be paid to controlling the firing time to prevent the green column from turning black, so as to reduce the influence of fine particle composition inside the aerated brick.

Magnesia slaked lime and calcareous slaked lime are called slaked lime. But slaked lime is often referred to as calcareous slaked lime.

Calcium hydroxide is a white powdery base end solid. The chemical formula imitation of Ca(OH)2, commonly known as hydrated lime, slaked lime, after adding water, it is two layers, the upper layer of aqueous solution is called clarified lime water, and the lower layer of suspension is called lime milk or lime slurry.