1-We need to production of sodium bichromate (1500TPY) and also
production of chrome tanning agent as well.(Year is 300Days, with 2
Shifts, each shift is 8 hours) from Ore stones.
2-the composition of ore is as follows:
For chromite ore:
Cr2O3.Content: 48%
Al2O3 10%-15%
Fe2O3 10%-15%
SiO2 2%-5%
Lump Size 125mmx120mm
For Dulumite ore:
CaO-content: 26%-30%
MgO: 26%-28%
SiO2 : 0.2%-1%
Moisture: 6%
For “Sodium carbonate” we provide it from “Shiraz petrochemical
company”, as powder in big bag.
3-Please be inform that the capacity which we requested was 1500TPY
with 2 shifts per day in 300 working days, and also we need to have a
production line of chrome tanning agent in capacity of 3000TPY
according to 2 shifts each shift is 8hours.Then finally we will have 2
products, one is 1500TPY Sodium bichromate as first product for
selling, and also 3000TPD Chrome Tanning agent as second products for
selling.
If we should use Sodium bi chromate for producing chrome tanning agent
then we should have a sodium bi chromate line bigger than 1500TPYuntil
we can have1500TPY bi chromate and 3000TPY chrome tanning agent.
4-Sulfuric acid is required as raw material for conversion of sodium
mono chromate into bi chromate.
5- Our N.G. has got the average heating value about: 8000 to 8300 kcal/m3
6-Our products has got following Analysis:
6-1-Waste of production of sodium bi chromate is sodium sulfate mudded
with sodium bi chromate.
6-2-Approximate yield of sodium sulfate for 1 t of sodium bi chromate
(67.1%Cr2O3) is 0.6-0.8 t in conversion to 95% Na2SO4(Please consider
thatwe need your optional separate price for processing of sodium
sulfate for getting of commercial sulfate or sodium sulfide (Na2S)
which is required).
About getting commercial sulfate or sodium sulfide (Na2S) please
announce your proposal as option with separate and break down price
and summery process description and diagram, with necessary area, and
required utility, and we can review that for further project.
6-3-Our products Analysis:
Please be inform that, our commercial products are as follow:
First Product:
Sodium Di Chromate(or Sodium Bi Chromate)
Na2Cr2O7, 2H2O
Molecular weight: 298 gram-mol
Redish yellow crystaline, above 95% purity
Solute in water
SP.G.: 2.525
Melting point: 356 oC(Salt without water)
Decomposition or (Calcination) Temp.: 400 oC
Water Lost temperature:84.6 oC
Packed in: 50 kg per suitable pack
Second Product:
Tanning chrome:
Cr2O3.3SO3.Na2O
Molecular weight: 472 gr-mol
Green crystaline
Solute in water
Chromium oxide: 25%-26%
Alkalinity: 32.3% – 34.3%wt
Solublity in 27 oC water: 95%
Fe2O3: 1%
Packed in : 40 kg suitable package
All Parameters should be according to industrial commercial product standard.
We would like to do this process of project turnkey without utilities.
Also process of that should be with high technology because of
environmental protection.
If your company can supply that please send us your technical proposal
based on above mentioned ores and in breakdown prices, primary flow
diagram, area needed, and necessary utilities for your plant,
introducing equipment and your process, Guarantees, totally time
schedule which shows times of delivering, erecting, installing,
commissioning, start up, running , delivery, your references and all
necessary things(Guarantees, supporting,spare parts, …)
Also send us your company’s catalogue which shows the same your
projects (if any).
