The role of ferrous chloride

Role of ferrous chloride:

It is widely used in textile printing and dyeing, pigment dyeing, manufacturing and other industries. It is also used in super high pressure lubricating oil components, medicine, metallurgy and photography.

Ferrous chloride has the unique decolorization ability, which is suitable for the wastewater treatment of dyestuff intermediates, printing and dyeing, and papermaking industries.It can simplify water treatment process, shorten water treatment cycle and reduce water treatment cost.It has obvious treatment effect on all kinds of wastewater, electroplating, leather and papermaking wastewater, and the removal rate of all kinds of heavy metal ions in wastewater and wastewater is close to 100%.

It is an ideal agent for wastewater treatment because of its low cost.It is widely used in textile printing and dyeing, pigment printing and dyeing, manufacturing and other industries. It is also used in ultra-high pressure lubricating oil components, as well as in medicine, metallurgy and photography.In addition, it has the following important USES:

1.Production of iron chloride

Use ferrous chloride solid hydrochloric acid and chlorine gas as the main raw material to produce iron trichloride, first is the ferrous chloride ratio into a solution, heating into chlorine gas, you can get iron trichloride solution, if the iron trichloride solution after filtering, heating, chlorine gas or nitric acid, concentration, cooling, can get solid hexahydrate iron trichloride.Ferric chloride completely reacts to ferric chloride trichloride.The product quality conforms to the national standard gb1621-79.

2.Production of solid polyferric chloride

(1) put ferrous chloride crystal into the reactor, and slowly heat it to 45-65℃ after adding water, start the reactor agitator, and pass compressed air at the bottom of the reactor, and stop heating when the temperature reaches 85-95℃

Upper (2) in reaction kettle to join alkaline solution reaction, reaction and hydrochloric acid aqueous solution under the reactant liquid level and temperature control in 90 ~ 95 ℃, to detect the reactants in the Fe write [2 +] 0.15% or less is to join the lye, on the base of up to 5 ~ 10% stop to join the hydrochloric acid aqueous solution, stirring, access to press the material hot compressed air into the machine cooling into solid, after smashing become high content of solid polymer ferric chloride, application of the present invention of solid polymer ferric chloride production, stable quality, low cost and no three wastes produced products have good stability, production process, product without secondary pollution.[1]

3.Production of polyaluminum-iron flocculant (PAFC)

A kind of inorganic high polymer flocculant produced on the basis of aluminum salt and iron salt flocculant.

4.Treatment of printing and dyeing wastewater with ferrous chloride waste liquid

Treatment of printing and dyeing wastewater with ferrous chloride.After adding polar medium and changing ionization degree in printing and dyeing wastewater, FeCl2 was used.The treated printing and dyeing wastewater treatment solution can also be mixed with 1-2 times the amount of untreated printing and dyeing wastewater, and then adjust the pH value to neutralize, condense and precipitate. The wastewater is discharged after solid-liquid separation. The removal rate of COD in the wastewater is ≥50%, and the removal rate of chroma is 70-90%.FeCl2 has been widely used in the treatment of printing and dyeing wastewater, which can produce good environmental and economic benefits.

It has obvious treatment effect on all kinds of wastewater, electroplating and leather wastewater, and the removal rate of all kinds of heavy metal ions in wastewater and sewage is close to 100%.Unique decolorization ability, suitable for dye, dye intermediates and printing and dyeing industry sewage treatment.It can simplify water treatment process, shorten water treatment cycle and reduce water treatment cost.

5.Produce erasable ink

It is a mixture of inorganic salts and color dyes. The formula is sodium polyacrylate, ferrous chloride, cobalt sulfate, sodium sulfate, color dyes and water. The color dyes can be black, blue, green, red and other pigments respectively.Words written in this ink can be easily erased with an ordinary eraser. When the writing dries, it will not change color and will last for a long time.

6.Quick curing agent for silty sand soil slope

Ferrous chloride + calcium hydroxide, with a large compression strength: 40-50kpa (28 days) strong 4-5 times.

7.Ferrous chloride additive water mist extinguishing agent

In order to improve the effectiveness of conventional fine water mist extinguishing and expand its application range, this paper studied the effectiveness of fine water mist containing ferrous chloride additives in extinguishing pool fire under different fuel types, additive concentrations and pressures by means of small-scale experiments.The experimental results show that adding ferrous chloride to water mist significantly affects its fire-extinguishing performance.The fire extinguishing time of fine water mist changes with the change of the mass concentration of added ferrous chloride, and there is a minimum fire-extinguishing time concentration.The working pressure of spray nozzle and the type of fuel also have influence on the fire extinguishing performance of the spray nozzle.Under the same experimental conditions, the time of extinguishing kerosene fire was shorter than that of extinguishing ethanol fire.