Soda Ash Light

Description

Soda Ash Technology from China. Chinese Corporation offers mature technology and equipment with soda ash. The plant can adopt dual process (Hou's process) or the Solvay proces with raw salt and limestone as raw materials. Till now, the corporation has exported such technology to South East Asia with a great success.

Area of Application

Chemical industry, detergent industry, manufacturing of soap and other detergents

Keywords

Soda Ash, Chemicals

Advantages
Technology suitable for developing countries Corporation has accumulated vast experience with a strong technical care from chiness co

Sulphuric Acids in Steel industries for picling

“Picking is immersion of objects in dilute acid for the purpose of removing
oxides orscale. The most common acids used for pickling is hydrochloric acid, Sulphuric acid and Phosphoric acid”.

Hydrochloric acid, being fuming in nature, is normally used at room temperature unheated), while both Sulphuric and phosphoric acid are used, both heated and unheated.


SULPHURIC ACID PICKLING BATH
BATH MAKEUP

20-25Litres / 100litres of water.

CONTROL POINTS
Strength 20-25- Check daily
Iron Content (Fe) 10% Max – Check weekly.

TEST METHOD ( For both Hydrochloric Acid & Sulphuric Acid baths )

STRENGTH
1.Pipette 10 ml of bath solution in to a 100ml measuring Cylinder. Dilute to 100ml
Distilled water.
2.Pipette 10ml of the diluted solution in to a 250ml conical flask and dilute it with
100ml of distilled water.
3.Add 2/3 drops of methyl orange indicator.
4.Titrate against N/ 10 Sodium hydroxide solution to golden yellow end point.

%HYDROCHLORIC ACID (W/V) = NO. of mls of N/10 Na0H X 0.365

%SULPHURIC ACID (W/V) = NO. of mls of N/10 Na0H X 0.49

IRON
1. Pipette 10ml of bath solution into a 100ml conical flask
2. Add 10ml of dilute Sulphuric acid (1:1)
3. Titrate against N/10 KMno4 Solution until a pink color is obtained
% Fe (F/V) = No. of mls of N/10 KMno4 X 0.056

Hydrochloric Acids Pickling Method in steel Industries

Picking is immersion of objects in dilute acid for the purpose of removing oxides or scale. The most common acids used for pickling is hydrochloric acid, Sulphuric acid and Phosphoric acid.

Hydrochloric acid, being fuming in nature, is normally used at room temperature (unheated), while both Sulphuric and phosphoric acid are used, both heated and unheated.

Hydrochloric acid (normally available at 30-33% Strength ) is used at a dilution of
1:1 or 1:2 i.e. 10-20 %

Sulphuric acid ( Normally available at 98% ) is used at a dilution of 1:4 or 1:5 i.e.20-25%

During usage, iron builds up in the pickling bath & it is a standard practice to discard them, when the Iron content (Fe) reaches 7.0% (MAX 10.0% )

The control & operation of Hydrochloric & Sulphuric acid pickling baths are given below :-

HYDROCHLORIG ACID PICKLING BATH
BATH MAKEUP

30-50Lrs / 100Lrs. Of Water

CONTROL POINTS
Strength 10-20%- check daily.
Iron content (Fe) 10% Max- Check weekly.