CN104122302B - A kind of evaluation methodology of basic refractory hydration resistance - Google Patents

Abstract

The present invention relates to the evaluation methodology of a kind of basic refractory hydration resistance.Its technical scheme is: record electrical conductivity of water λ₀, it is 1 by solid-liquid mass ratio: basic refractory particulate material and water are added the first beaker by (500～800), 25～30 DEG C of thermostatic drying chambers stands 0.25～0.5h, filters；Rehydration solution after filtration pours the second beaker into, stands 2～4h in 25～30 DEG C of thermostatic drying chambers；Detect the electrical conductivity λ of rehydration solution in the second beaker, obtain Mg in the rehydration solution of the basic refractory containing MgO²⁺ConcentrationOr obtain Ca in the rehydration solution of the basic refractory containing CaO²⁺Concentration

Description

A kind of evaluation methodology of basic refractory hydration resistance

Technical field

The invention belongs to basic refractory applied technical field.It is specifically related to the evaluation methodology of a kind of basic refractory hydration resistance.

Background technology

Since the Thomas-Gilchrist process appearance of 19th century, basic refractory receives much concern owing to having the characteristic of excellent applied at elevated temperature performance and cleaning molten steel.Meanwhile, the hydration characteristics that basic refractory is intrinsic also directly constrains its industrialized production and use.How accurately, evaluate the hydration resistance of basic refractory all sidedly and then become the important parameter weighing basic refractory combination property, be also the key issue promoting basic refractory development.

At present, the evaluation methodology various countries/area of basic refractory hydration resistance is all variant, this is mainly due to caused by the climatic environment difference such as temperature, humidity.The evaluation methodology of basic refractory hydration resistance is increased weight based on chemical reaction method and natural placement methods.

Chemical reaction weightening finish method specifically includes that boiling method and steam-autoclave method.

Boiling method is adopted to evaluate the hydration resistance of basic refractory, it is usually under normal pressure (1 normal atmosphere) by basic refractory and directly contacts with boiling water and keep certain time, it is then peeled off basic refractory and moisture, and fully weigh after drying, the mass change occurred by basic refractory and boiling water haptoreaction and pulverization rate evaluate the hydration resistance of basic refractory.

Steam-autoclave method is adopted to evaluate the hydration resistance of basic refractory, it is that basic refractory is placed in closed environment, when certain water vapour pressure, basic refractory is made to contact with steam, weigh after certain response time, evaluated the hydration resistance of basic refractory material by percent mass penalty.

In a word, chemical reaction weightening finish method evaluates the hydration resistance of basic refractory mainly by the change of macroscopic quality, and its shortcoming is that the evaluation precision to basic refractory hydration resistance is low, error big or the security performance of valuator device is required height.

Natural placement methods mainly includes the long-term preservation method of normal pressure and constant temperature and humidity preservation method.Adopt normal pressure preserve for a long time or constant temperature and humidity preservation method evaluate basic refractory hydration resistance, it is basic refractory is directly exposed in air or constant environment, observes (basic refractory absorb the moisture in external environment and avalanche damage) by long-term profile or mass change evaluates the hydration resistance of basic refractory.But the evaluation methodology of this class is obvious by the impact of regional climate environment, error of quality appraisement is relatively big, and evaluation cycle longer (general 3～6 months), it is difficult to comprehensively, accurately evaluate the hydration resistance of basic refractory.

Summary of the invention

It is contemplated that overcome prior art defect, it is therefore intended that provide the evaluation methodology of the basic refractory hydration resistance that a kind of method is simple, the cycle is short, precision is high, range of value is wide and security performance is good.

For achieving the above object, the technical solution adopted in the present invention is:

The first step, basic refractory is crushed to 1～2mm, obtains basic refractory particulate material.

Second step, weigh 1～5g basic refractory particulate material and pour in the first beaker, then record the electrical conductivity of water λ intending pouring the first beaker into₀, it is then 1 by the mass ratio of described basic refractory particulate material Yu described water: (500～800) add described water in the first beaker.

3rd step, the first beaker after adding water is placed in the thermostatic drying chamber of 25～30 DEG C, stands 0.25～0.5 hour.

4th step, take out the first beaker, filter；Again the rehydration solution after filtration is poured in the second beaker, be placed in the thermostatic drying chamber of 25～30 DEG C, stand 2～4 hours；Take out the second beaker, detect the electrical conductivity λ of rehydration solution in the second beaker.

5th step, set up the mathematical model of the rehydration solution ion concentration of basic refractory

Mg in the rehydration solution of (a) basic refractory containing MgO²⁺The mathematical model of concentration:

$c\left({\mathrm{Mg}}^{2+}\right)=1000(\mathrm{\λ}-{\mathrm{\λ}}_0)/2K_{\mathrm{Mg}{\left(\mathrm{OH}\right)}_2}---\left(1\right)$

In formula (1): c (Mg²⁺) be basic refractory containing MgO rehydration solution in Mg²⁺Concentration, mol/L；

λ is the electrical conductivity of rehydration solution, S/m；

λ₀For electrical conductivity of water, S/m；

For Mg (OH)₂The proportionality constant of electrical conductivity of solution,

$K_{\mathrm{Mg}{\left(\mathrm{OH}\right)}_2}=18.9m^2\·S\·{\mathrm{mol}}^{-1}.$

Ca in the rehydration solution of (b) basic refractory containing CaO²⁺The mathematical model of concentration:

$c\left({\mathrm{Ca}}^{2+}\right)=1000(\mathrm{\λ}-{\mathrm{\λ}}_0)/2K_{\mathrm{Ca}{\left(\mathrm{OH}\right)}_2}---\left(2\right)$

In formula (2): c (Ca²⁺) be basic refractory containing CaO rehydration solution in Ca²⁺Concentration, mol/L；

λ is the electrical conductivity of rehydration solution, S/m；

λ₀For electrical conductivity of water, S/m；

For Ca (OH)₂The proportionality constant of electrical conductivity of solution,

$K_{\mathrm{Ca}{\left(\mathrm{OH}\right)}_2}=188.4m^2\·S\·{\mathrm{mol}}^{-1}.$

6th step, (a) obtain Mg in the rehydration solution of the basic refractory containing MgO according to formula (1)²⁺Concentration, more namely obtained the opinion rating of basic refractory hydration resistance containing MgO by table 1；

The evaluation reference table of the table 1 basic refractory hydration resistance containing MgO

B () obtains Ca in the rehydration solution of the basic refractory containing CaO according to formula (2)²⁺Concentration, more namely obtained the opinion rating of basic refractory hydration resistance containing CaO by table 2.

The evaluation reference table of the table 2 basic refractory hydration resistance containing CaO

Described basic refractory is containing MgO or is the one in the refractory material containing CaO.

Described water is deionized water or is redistilled water.

Owing to adopting technique scheme, the present invention compared with prior art has following good effect:

1, due to the present invention in evaluation procedure without special detection equipment and treatment technology, therefore evaluation methodology is simple；Without providing the test condition such as high temperature, high pressure, evaluation procedure nonhazardous gas or solution to produce in evaluation procedure, security performance is good.

2, owing to the present invention adopts aqueous water directly and basic refractory haptoreaction, increase the direct contact surface of basic refractory and water, improve the evaluation precision of basic refractory hydration resistance, reduce error of quality appraisement.

3, owing to the present invention passes through the introducing of the electrochemical means electrical conductivity to detect rehydration solution, shorten the cycle of detection, expand the range of value of basic refractory hydration resistance, all can carry out hydration resistance evaluation to containing MgO or the basic refractory containing CaO.

Therefore, the present invention has the advantages that method is simple, the cycle is short, precision is high, range of value is wide and security performance is good.

Detailed description of the invention

Below in conjunction with embodiment, the invention will be further described, not limiting the scope of the invention:

The table 1 and table 2 Unify legislation that first this detailed description of the invention are related to are as follows, repeat no more in embodiment:

The evaluation reference table of the table 1 basic refractory hydration resistance containing MgO

The evaluation reference table of the table 2 basic refractory hydration resistance containing CaO

Embodiment 1

A kind of evaluation methodology of the basic refractory hydration resistance containing MgO.Comprising the concrete steps that of described evaluation methodology:

The first step, basic refractory is crushed to 1～2mm, obtains basic refractory particulate material.

Second step, weigh 1～3g basic refractory particulate material and pour in the first beaker, then record the electrical conductivity of water λ intending pouring the first beaker into₀It is 7.3 × 10^-4S/m, is then 1 by the mass ratio of described basic refractory particulate material Yu described water: (500～600) add described water in the first beaker.

3rd step, the first beaker after adding water is placed in the thermostatic drying chamber of 25～30 DEG C, stands 0.45～0.50 hour.

4th step, take out the first beaker, filter；Again the rehydration solution after filtration is poured in the second beaker, be placed in the thermostatic drying chamber of 25～30 DEG C, stand 2～3 hours；Taking out the second beaker, detecting the electrical conductivity λ of rehydration solution in the second beaker is 35.5 × 10^-4S/m。

5th step, set up Mg in the rehydration solution of basic refractory containing MgO²⁺The mathematical model of concentration:

$c\left({\mathrm{Mg}}^{2+}\right)=1000(\mathrm{\λ}-{\mathrm{\λ}}_0)/2K_{\mathrm{Mg}{\left(\mathrm{OH}\right)}_2}---\left(1\right)$

In formula (1): c (Mg²⁺) be basic refractory containing MgO rehydration solution in Mg²⁺Concentration, mol/L；

λ is the electrical conductivity of rehydration solution, S/m；

λ₀For electrical conductivity of water, S/m；

For Mg (OH)₂The proportionality constant of electrical conductivity of solution,

$K_{\mathrm{Mg}{\left(\mathrm{OH}\right)}_2}=18.9m^2\·S\·{\mathrm{mol}}^{-1}.$

6th step, according to formula (1), Mg in the rehydration solution of the basic refractory containing MgO²⁺Concentration:

$\begin{array}{c}c\left({\mathrm{Mg}}^{2+}\right)=1000(\mathrm{\λ}-{\mathrm{\λ}}_0)/2K_{\mathrm{Mg}{\left(\mathrm{OH}\right)}_2}\\ =1000\×(35.5\×{10}^{-4}-7.3\×{10}^{-4})/2\×18.9\\ =7.5\×{10}^{-5}(\mathrm{mol}/L)\end{array}$

Namely the opinion rating being obtained the basic refractory hydration resistance containing MgO by table 1 is " generally ".

Water described in the present embodiment is redistilled water.

Embodiment 2

A kind of evaluation methodology of the basic refractory hydration resistance containing MgO.Comprising the concrete steps that of described evaluation methodology:

The first step, the first step with embodiment 1.

Second step, weigh 1～3g basic refractory particulate material and pour in the first beaker, then record the electrical conductivity of water λ intending pouring the first beaker into₀It is 6.8 × 10^-4S/m, is then 1 by the mass ratio of described basic refractory particulate material Yu described water: (600～700) add described water in the first beaker.

3rd step, the first beaker after adding water is placed in the thermostatic drying chamber of 25～30 DEG C, stands 0.35～0.40 hour.

4th step, take out the first beaker, filter；Again the rehydration solution after filtration is poured in the second beaker, be placed in the thermostatic drying chamber of 25～30 DEG C, stand 2～3 hours；Taking out the second beaker, detecting the electrical conductivity λ of rehydration solution in the second beaker is 17.4 × 10^-4S/m。

5th step, the 5th step with embodiment 1.

6th step, according to formula (1), Mg in the rehydration solution of the basic refractory containing MgO²⁺Concentration:

$\begin{array}{c}c\left({\mathrm{Mg}}^{2+}\right)=1000(\mathrm{\λ}-{\mathrm{\λ}}_0)/2K_{\mathrm{Mg}{\left(\mathrm{OH}\right)}_2}\\ =1000\×(17.4\×{10}^{-4}-6.8\×{10}^{-4})/2\×18.9\\ =2.8\×{10}^{-5}(\mathrm{mol}/L)\end{array}$

Namely the opinion rating being obtained the basic refractory hydration resistance containing MgO by table 1 is " excellent ".

Water described in the present embodiment is redistilled water.

Embodiment 3

A kind of evaluation methodology of the basic refractory hydration resistance containing MgO.Comprising the concrete steps that of described evaluation methodology:

The first step, the first step with embodiment 1.

Second step, weigh 2～4g basic refractory particulate material and pour in the first beaker, then record the electrical conductivity of water λ intending pouring the first beaker into₀It is 9.6 × 10^-4S/m, is then 1 by the mass ratio of described basic refractory particulate material Yu described water: (550～650) add described water in the first beaker.

3rd step, the first beaker after adding water is placed in the thermostatic drying chamber of 25～30 DEG C, stands 0.30～0.35 hour.

4th step, take out the first beaker, filter；Again the rehydration solution after filtration is poured in the second beaker, be placed in the thermostatic drying chamber of 25～30 DEG C, stand 2.5～3.5 hours；Taking out the second beaker, detecting the electrical conductivity λ of rehydration solution in the second beaker is 27.9 × 10^-4S/m。

5th step, the 5th step with embodiment 1.

6th step, according to formula (1), Mg in the rehydration solution of the basic refractory containing MgO²⁺Concentration:

$\begin{array}{c}c\left({\mathrm{Mg}}^{2+}\right)=1000(\mathrm{\λ}-{\mathrm{\λ}}_0)/2K_{\mathrm{Mg}{\left(\mathrm{OH}\right)}_2}\\ =1000\×(27.9\×{10}^{-4}-9.6\×{10}^{-4})/2\×18.9\\ =4.8\×{10}^{-5}(\mathrm{mol}/L)\end{array}$

Namely the opinion rating being obtained the basic refractory hydration resistance containing MgO by table 1 is " good ".

Water described in the present embodiment is deionized water.

Embodiment 4

A kind of evaluation methodology of the basic refractory hydration resistance containing MgO.Comprising the concrete steps that of described evaluation methodology:

The first step, the first step with embodiment 1.

Second step, weigh 3～5g basic refractory particulate material and pour in the first beaker, then record the electrical conductivity of water λ intending pouring the first beaker into₀It is 7.5 × 10^-4S/m, is then 1 by the mass ratio of described basic refractory particulate material Yu described water: (700～800) add described water in the first beaker.

3rd step, the first beaker after adding water is placed in the thermostatic drying chamber of 25～30 DEG C, stands 0.25～0.30 hour.

4th step, take out the first beaker, filter；Again the rehydration solution after filtration is poured in the second beaker, be placed in the thermostatic drying chamber of 25～30 DEG C, stand 3～4 hours；Taking out the second beaker, detecting the electrical conductivity λ of rehydration solution in the second beaker is 42.4 × 10^-4S/m。

5th step, the 5th step with embodiment 1.

6th step, according to formula (1), Mg in the rehydration solution of the basic refractory containing MgO²⁺Concentration:

$\begin{array}{c}c\left({\mathrm{Mg}}^{2+}\right)=1000(\mathrm{\λ}-{\mathrm{\λ}}_0)/2K_{\mathrm{Mg}{\left(\mathrm{OH}\right)}_2}\\ =1000\×(42.4\×{10}^{-4}-7.5\×{10}^{-4})/2\×18.9\\ =9.2\×{10}^{-5}(\mathrm{mol}/L)\end{array}$

Namely the opinion rating being obtained the basic refractory hydration resistance containing MgO by table 1 is " qualified ".

Water described in the present embodiment is redistilled water.

Embodiment 5

A kind of evaluation methodology of the basic refractory hydration resistance containing MgO.Comprising the concrete steps that of described evaluation methodology:

The first step, the first step with embodiment 1.

Second step, weigh 3～5g basic refractory particulate material and pour in the first beaker, then record the electrical conductivity of water λ intending pouring the first beaker into₀It is 9.1 × 10^-4S/m, is then 1 by the mass ratio of described basic refractory particulate material Yu described water: (650～750) add described water in the first beaker.

3rd step, the first beaker after adding water is placed in the thermostatic drying chamber of 25～30 DEG C, stands 0.40～0.45 hour.

4th step, take out the first beaker, filter；Again the rehydration solution after filtration is poured in the second beaker, be placed in the thermostatic drying chamber of 25～30 DEG C, stand 3～4 hours；Taking out the second beaker, detecting the electrical conductivity λ of rehydration solution in the second beaker is 54.5 × 10^-4S/m。

5th step, the 5th step with embodiment 1.

6th step, according to formula (1), Mg in the rehydration solution of the basic refractory containing MgO²⁺Concentration:

$\begin{array}{c}c\left({\mathrm{Mg}}^{2+}\right)=1000(\mathrm{\λ}-{\mathrm{\λ}}_0)/2K_{\mathrm{Mg}{\left(\mathrm{OH}\right)}_2}\\ =1000\×(54.5\×{10}^{-4}-9.1\×{10}^{-4})/2\×18.9\\ =1.2\×{10}^{-4}(\mathrm{mol}/L)\end{array}$

Namely the opinion rating being obtained the basic refractory hydration resistance containing MgO by table 1 is " defective ".

Water described in the present embodiment is deionized water.

Embodiment 6

A kind of evaluation methodology of the basic refractory hydration resistance containing CaO.Comprising the concrete steps that of described evaluation methodology:

The first step, basic refractory is crushed to 1～2mm, obtains basic refractory particulate material.

Second step, weigh 1～3g basic refractory particulate material and pour in the first beaker, then record the electrical conductivity of water λ intending pouring the first beaker into₀It is 7.2 × 10^-4S/m, is then 1 by the mass ratio of described basic refractory particulate material Yu described water: (500～600) add described water in the first beaker.

3rd step, the first beaker after adding water is placed in the thermostatic drying chamber of 25～30 DEG C, stands 0.45～0.50 hour.

4th step, take out the first beaker, filter；Again the rehydration solution after filtration is poured in the second beaker, be placed in the thermostatic drying chamber of 25～30 DEG C, stand 2～3 hours；Taking out the second beaker, detecting the electrical conductivity λ of rehydration solution in the second beaker is 1.1S/m.

5th step, set up Ca in the rehydration solution of basic refractory containing CaO²⁺The mathematical model of concentration:

$c\left({\mathrm{Ca}}^{2+}\right)=1000(\mathrm{\λ}-{\mathrm{\λ}}_0)/2K_{\mathrm{Ca}{\left(\mathrm{OH}\right)}_2}---\left(2\right)$

In formula (2): c (Ca²⁺) be basic refractory containing CaO rehydration solution in Ca²⁺Concentration, mol/L；

λ is the electrical conductivity of rehydration solution, S/m；

λ₀For electrical conductivity of water, S/m；

For Ca (OH)₂The proportionality constant of electrical conductivity of solution,

$K_{\mathrm{Ca}{\left(\mathrm{OH}\right)}_2}=188.4m^2\·S\·{\mathrm{mol}}^{-1}.$

6th step, according to formula (2), Ca in the rehydration solution of the basic refractory containing CaO²⁺Concentration:

$\begin{array}{c}c\left({\mathrm{Ca}}^{2+}\right)=1000(\mathrm{\λ}-{\mathrm{\λ}}_0)/2K_{\mathrm{Ca}{\left(\mathrm{OH}\right)}_2}\\ =1000\×(1.1-7.2\×{10}^{-4})/2\×188.4\\ =2.9\×{10}^{-3}(\mathrm{mol}/L)\end{array}$

Namely the opinion rating being obtained the basic refractory hydration resistance containing CaO by table 2 is " good ".

Water described in the present embodiment is redistilled water.

Embodiment 7

A kind of evaluation methodology of the basic refractory hydration resistance containing CaO.Comprising the concrete steps that of described evaluation methodology:

The first step, the first step with embodiment 6.

Second step, weigh 1～3g basic refractory particulate material and pour in the first beaker, then record the electrical conductivity of water λ intending pouring the first beaker into₀It is 6.9 × 10^-4S/m, is then 1 by the mass ratio of described basic refractory particulate material Yu described water: (600～700) add described water in the first beaker.

3rd step, the first beaker after adding water is placed in the thermostatic drying chamber of 25～30 DEG C, stands 0.35～0.40 hour.

4th step, take out the first beaker, filter；Again the rehydration solution after filtration is poured in the second beaker, be placed in the thermostatic drying chamber of 25～30 DEG C, stand 2～3 hours；Taking out the second beaker, detecting the electrical conductivity λ of rehydration solution in the second beaker is 2.8S/m.

5th step, the 5th step with embodiment 6.

6th step, according to formula (2), Ca in the rehydration solution of the basic refractory containing CaO²⁺Concentration:

$\begin{array}{c}c\left({\mathrm{Ca}}^{2+}\right)=1000(\mathrm{\λ}-{\mathrm{\λ}}_0)/2K_{\mathrm{Ca}{\left(\mathrm{OH}\right)}_2}\\ =1000\×(2.8-6.9\×{10}^{-4})/2\×188.4\\ =7.4\×{10}^{-3}(\mathrm{mol}/L)\end{array}$

Namely the opinion rating being obtained the basic refractory hydration resistance containing CaO by table 2 is " qualified ".

Water described in the present embodiment is redistilled water.

Embodiment 8

A kind of evaluation methodology of the basic refractory hydration resistance containing CaO.Comprising the concrete steps that of described evaluation methodology:

The first step, the first step with embodiment 6.

Second step, weigh 2～4g basic refractory particulate material and pour in the first beaker, then record the electrical conductivity of water λ intending pouring the first beaker into₀It is 9.4 × 10^-4S/m, is then 1 by the mass ratio of described basic refractory particulate material Yu described water: (550～650) add described water in the first beaker.

3rd step, the first beaker after adding water is placed in the thermostatic drying chamber of 25～30 DEG C, stands 0.30～0.35 hour.

4th step, take out the first beaker, filter；Again the rehydration solution after filtration is poured in the second beaker, be placed in the thermostatic drying chamber of 25～30 DEG C, stand 2.5～3.5 hours；Taking out the second beaker, detecting the electrical conductivity λ of rehydration solution in the second beaker is 0.33S/m.

5th step, the 5th step with embodiment 6.

6th step, according to formula (2), Ca in the rehydration solution of the basic refractory containing CaO²⁺Concentration:

$\begin{array}{c}c\left({\mathrm{Ca}}^{2+}\right)=1000(\mathrm{\λ}-{\mathrm{\λ}}_0)/2K_{\mathrm{Ca}{\left(\mathrm{OH}\right)}_2}\\ =1000\×(0.33-9.4\×{10}^{-4})/2\×188.4\\ =8.7\×{10}^{-4}(\mathrm{mol}/L)\end{array}$

Namely the opinion rating being obtained the basic refractory hydration resistance containing CaO by table 2 is " excellent ".

Water described in the present embodiment is deionized water.

Embodiment 9

A kind of evaluation methodology of the basic refractory hydration resistance containing CaO.Comprising the concrete steps that of described evaluation methodology:

The first step, the first step with embodiment 6.

Second step, weigh 3～5g basic refractory particulate material and pour in the first beaker, then record the electrical conductivity of water λ intending pouring the first beaker into₀It is 7.0 × 10^-4S/m, is then 1 by the mass ratio of described basic refractory particulate material Yu described water: (700～800) add described water in the first beaker.

3rd step, the first beaker after adding water is placed in the thermostatic drying chamber of 25～30 DEG C, stands 0.25～0.30 hour.

4th step, take out the first beaker, filter；Again the rehydration solution after filtration is poured in the second beaker, be placed in the thermostatic drying chamber of 25～30 DEG C, stand 3～4 hours；Taking out the second beaker, detecting the electrical conductivity λ of rehydration solution in the second beaker is 2.3S/m.

5th step, the 5th step with embodiment 6.

6th step, according to formula (2), Ca in the rehydration solution of the basic refractory containing CaO²⁺Concentration:

$\begin{array}{c}c\left({\mathrm{Ca}}^{2+}\right)=1000(\mathrm{\λ}-{\mathrm{\λ}}_0)/2K_{\mathrm{Ca}{\left(\mathrm{OH}\right)}_2}\\ =1000\×(2.3-7.0\×{10}^{-4})/2\×188.4\\ =6.1\×{10}^{-3}(\mathrm{mol}/L)\end{array}$

Namely the opinion rating being obtained the basic refractory hydration resistance containing CaO by table 2 is " generally ".

Water described in the present embodiment is redistilled water.

Embodiment 10

A kind of evaluation methodology of the basic refractory hydration resistance containing CaO.Comprising the concrete steps that of described evaluation methodology:

The first step, the first step with embodiment 6.

Second step, weigh 3～5g basic refractory particulate material and pour in the first beaker, then record the electrical conductivity of water λ intending pouring the first beaker into₀It is 9.3 × 10^-4S/m, is then 1 by the mass ratio of described basic refractory particulate material Yu described water: (650～750) add described water in the first beaker.

3rd step, the first beaker after adding water is placed in the thermostatic drying chamber of 25～30 DEG C, stands 0.40～0.45 hour.

4th step, take out the first beaker, filter；Again the rehydration solution after filtration is poured in the second beaker, be placed in the thermostatic drying chamber of 25～30 DEG C, stand 3～4 hours；Taking out the second beaker, detecting the electrical conductivity λ of rehydration solution in the second beaker is 3.5S/m.

5th step, the 5th step with embodiment 6.

6th step, according to formula (2), Ca in the rehydration solution of the basic refractory containing CaO²⁺Concentration:

$\begin{array}{c}c\left({\mathrm{Ca}}^{2+}\right)=1000(\mathrm{\λ}-{\mathrm{\λ}}_0)/2K_{\mathrm{Ca}{\left(\mathrm{OH}\right)}_2}\\ =1000\×(3.5-9.3\×{10}^{-4})/2\×188.4\\ =9.3\×{10}^{-3}(\mathrm{mol}/L)\end{array}$

Namely the opinion rating being obtained the basic refractory hydration resistance containing CaO by table 2 is " defective ".

Water described in the present embodiment is deionized water.

This detailed description of the invention compared with prior art has following good effect:

1, due to this detailed description of the invention in evaluation procedure without special detection equipment and treatment technology, therefore evaluation methodology is simple；Without providing the test condition such as high temperature, high pressure, evaluation procedure nonhazardous gas or solution to produce in evaluation procedure, security performance is good.

2, owing to this detailed description of the invention adopts aqueous water directly and basic refractory haptoreaction, increase the direct contact surface of basic refractory and water, improve the evaluation precision of basic refractory hydration resistance, reduce error of quality appraisement.

3, owing to this detailed description of the invention passes through the introducing of the electrochemical means electrical conductivity to detect rehydration solution, shorten the cycle of detection, expand the range of value of basic refractory hydration resistance, all can carry out hydration resistance evaluation to containing MgO or the basic refractory containing CaO.

Therefore, this detailed description of the invention has the advantages that method is simple, the cycle is short, precision is high, range of value is wide and security performance is good.

Claims (3)

1. the detection method of a basic refractory hydration resistance, it is characterised in that evaluation procedure is as follows:

The first step, basic refractory is crushed to 1～2mm, obtains basic refractory particulate material；

Second step, weigh 1～5g basic refractory particulate material and pour in the first beaker, then record the electrical conductivity of water λ intending pouring the first beaker into₀, it is then 1 by the mass ratio of described basic refractory particulate material Yu described water: (500～800) add described water in the first beaker；

3rd step, the first beaker after adding water is placed in the thermostatic drying chamber of 25～30 DEG C, stands 0.25～0.5 hour；

4th step, take out the first beaker, filter；Again the rehydration solution after filtration is poured in the second beaker, be placed in the thermostatic drying chamber of 25～30 DEG C, stand 2～4 hours；Take out the second beaker, detect the electrical conductivity λ of rehydration solution in the second beaker；

5th step, set up the mathematical model of the rehydration solution ion concentration of basic refractory

Mg in the rehydration solution of (a) basic refractory containing MgO²⁺The mathematical model of concentration:

$c\left({\mathrm{Mg}}^{2+}\right)=1000(\mathrm{\λ}-{\mathrm{\λ}}_0)/2K_{Mg{\left(OH\right)}_2}---\left(1\right)$

In formula (1): c (Mg²⁺) be basic refractory containing MgO rehydration solution in Mg²⁺Concentration, mol/L；

λ is the electrical conductivity of rehydration solution, S/m；

λ₀For electrical conductivity of water, S/m；

For Mg (OH)₂The proportionality constant of electrical conductivity of solution,

$K_{Mg{\left(OH\right)}_2}=18.9m^2\·S\·{\mathrm{mol}}^{-1};$

Ca in the rehydration solution of (b) basic refractory containing CaO²⁺The mathematical model of concentration:

$c\left({\mathrm{Ca}}^{2+}\right)=1000(\mathrm{\λ}-{\mathrm{\λ}}_0)/2K_{Ca{\left(OH\right)}_2}---\left(2\right)$

In formula (2): c (Ca²⁺) be basic refractory containing CaO rehydration solution in Ca²⁺Concentration, mol/L；

λ is the electrical conductivity of rehydration solution, S/m；

λ₀For electrical conductivity of water, S/m；

For Ca (OH)₂The proportionality constant of electrical conductivity of solution,

$K_{Ca{\left(OH\right)}_2}=188.4m^2\·S\·{\mathrm{mol}}^{-1};$

6th step, (a) obtain Mg in the rehydration solution of the basic refractory containing MgO according to formula (1)²⁺Concentration, then the basic refractory hydration resistance containing MgO can be evaluated；

B () obtains Ca in the rehydration solution of the basic refractory containing CaO according to formula (2)²⁺Concentration, then can be evaluated obtaining the basic refractory hydration resistance containing CaO.

2. the detection method of basic refractory hydration resistance according to claim 1, it is characterised in that described basic refractory is containing MgO or is the one in the refractory material containing CaO.

3. the detection method of basic refractory hydration resistance according to claim 1, it is characterised in that described water is deionized water or is redistilled water.