Titanium Gypsum Ph

CN105439483A

The invention discloses a method for producing low-water-content white titanium gypsum. The method comprises the steps: adding crystal seeds to waste acid water of sulfuric acid-process production of titanium dioxide with the adding amount being 5-10% of the expected yield of the low-water-content white titanium gypsum, then adding rock flour, carrying out a reaction with …

Synthesis of magnetic adsorbents from titanium gypsum …

1. Introduction. Titanium gypsum (TiG), generally deemed as the Class I non-hazardous industrial solid waste, is a kind of industrial by-product gypsum generated from titanium oxide (TiO 2) production from ilmenite (FeTiO 3) ore using the sulfate process.The primary component of TiG is calcium sulfate dihydrate (CaSO 4 ·2H 2 O), but it also has a …

Effects of Reduced Fertilization Combined with Titanium …

Titanium gypsum (TG) could significantly reduce the bioavailability of As, Cu, and Cd in the soil, and increase the number of heavy metal-resistant bacteria in the soil

A kind of method that utilizes titanium gypsum to prepare …

[Translated] The invention relates to a method for preparing α-hemihydrate gypsum from titanium gypsum. It comprises the following steps: mixing the iron-removing titanium gypsum and salt solution at a solid-to-liquid mass ratio of 1:4-6 to obtain a slurry, the concentration of the salt solution being 10%-25% by weight, and then adding Crystal agent, …

Ajantox-RD-01

Travancore Titanium Products Ltd., Kochuveli, Thiruvananthapuram 695021 Kerala, India . Telephone : 0471 - 2703377, 2500540, 2502163, 2502748 . [email protected]

CO2 sequestration using red gypsum via pH-swing process: …

Red gypsum can be used as a raw material for mineral carbonation. • Carbonation efficiency of red gypsum attains maximum value at 75 °C.. High purity CaCO 3 (89.85–99.05%) is produced through pH swing process.. Carbonation efficiency and CaCO 3 purity is higher with NH 4 HCO 3 rather than CO 2.

Chemical composition of titanium gypsum test, …

Calcined titanium gypsum was investigated by the ways of XRD, XRF and TG-DTA analysis. It was employed as raw material for making lightweight materials.

CN109179476A

The present invention relates to a kind of methods for controlling titanium gypsum water content.The present invention prepares crystal seed before titanium white waste acid neutralization reaction progress and crystal form modifying agent is added, by controlling each step reaction condition, so that titanium gypsum water content drops to 20% or less by …

Titanium gypsum slurry dehydration method

The invention relates to a titanium gypsum slurry dehydration method, and belongs to the field of inorganic fine chemical engineering. The method comprises the following steps: firstly, measuring an isoelectric point of a titanium gypsum slurry, and adding lime to adjust the pH value of the titanium gypsum slurry to be that of a position near the isoelectric point, so that solids in the ...

Properties and microstructure of soil solidified by titanium …

This study systematically evaluates the effects of titanium slag-flue gas desulfurized gypsum-Portland cement composite (TS-FGD-OPC composite) solidifier on the performance of solidified soils. The evaluation includes assessing the unconfined compressive strength (UCS), elastic modulus, moisture content, and leachate pH value.

CN117046440A

The invention belongs to the field of restoration of contaminated soil, and particularly relates to titanium gypsum modified biochar for heavy metal adsorption and a preparation method thereof. The components of the gypsum powder comprise refined titanium gypsum and carbide, wherein the carbide raw materials are coconut byproducts and rubber tree byproducts; the preparation …

CN114733269A

The application discloses a method for cleaning titanium gypsum filter cloth, which at least comprises the following steps: s1, removing titanium gypsum on the surface of a titanium gypsum filter cloth, and then soaking the filter cloth in acid liquor with the acidity of 1-4 mol/L to remove acid-soluble impurities; s2, soaking the filter cloth by adopting a soluble fluoride salt …

Production, characterisation, and application of titanium …

Titanium gypsum contains a wide range of chemical elements that provide nutrients, acts as soil conditioners, reduces the potential for heavy metal leaching, improves the pH of acidic soils, and increases carbon dioxide sequestration.

Water Stability of Titanium Gypsum based Cementitious …

Titanium gypsum: it is taken from the storage yard newly built by Shandong Jinhong Titanium-White Chemical co., LTD in 2017. Its main composition is CaSO 4 ·2H 2 O, with a pH value …

Method for recycling titanium gypsum

The invention relates to a method for recycling titanium gypsum, which comprises the following steps: 1) Mixing Huang Yatie which is a byproduct in the titanium pigment process of the sulfuric acid method with titanium gypsum, pulping, adding fluorine-containing wastewater during pulping, and controlling the pH value of the slurry to be 2.8-4.1; 2) Carrying out solid-liquid …

Method for preparing alpha-semi-hydrated gypsum from titanium gypsum …

The invention relates to a method for preparing alpha-semi-hydrated gypsum from titanium gypsum. The method comprises the following steps of: mixing iron-removed titanium gypsum and a salt solution at a solid-liquid mass ratio of 1:(4-6) to obtain slurry, wherein the concentration of the salt solution is 10-25% by weight; adding a crystal modifier, and adjusting …

Production, characterisation, and application of titanium gypsum…

Introduction. Titanium gypsum (TG) is a industrial gypsum produced during the manufacture of titanium dioxide (TiO 2) by the sulphuric acid process, after neutralisation of the acid waste solution with lime or calcium carbide slag (Zapata-Carbonell et al., 2019, Zhai et al., 2020).At present, every 1 ton of TiO 2 produced in China generates about 6 ton of TG (Ma, …

Ajantox- RD-01-PG

Travancore Titanium Products Ltd., Kochuveli, Thiruvananthapuram 695021 Kerala, India . Telephone : 0471 - 2703377, 2500540, 2502163, 2502748 . [email protected]

Simultaneous immobilization of the cadmium, lead and …

In situ immobilization of heavy metals in contaminated soils using industrial by-products is an attractive remediation technique. In this work, titanium gypsum (TG) was applied at two levels (TG-L: 0.15% and TG-H: 0.30%) to simultaneously reduce the uptake of cadmium (Cd), lead (Pb) and arsenic (As) in rice grown in heavy metal contaminated paddy soils.

Properties and microstructure of soil solidified by titanium …

Using Portland cement for soil solidification has sustainability issues due to high energy-consumption and carbon emissions.An innovative approach suggests using titanium slag and flue gas desulfurized gypsum as substitutes for Portland cement for soil solidification. This study systematically evaluates the effects of titanium slag-flue gas desulfurized gypsum …

Adsorption characteristics of cationic dye RhB on modified titanium gypsum

The prepared titanium gypsum was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and BET. The effects of pH, temperature, contact time and adsorbent dosage on RhB ...

Production, characterisation, and application of titanium …

Titanium gypsum contains a wide range of chemical elements that provide nutrients, acts as soil conditioners, reduces the potential for heavy metal leaching, improves the pH of …

Improved macro-microscopic characteristic of gypsum-slag …

The pH value of the waste-derived activators contributes to mechanical performance of RCM. ... (RCM) prepared with titanium gypsum (TiG) and granulated blast furnace slag (GBFS). It is proposed to adjust the pH value of solid waste powder for calibrating the waste-derived activator, prepare RCM and explore the relationship between its ...

Effects of Reduced Fertilization Combined with Titanium …

These amendments increased soil pH without affecting alkali-hydrolyzed nitrogen, available phosphorus, available potassium, and organic matter. Moreover, reduced fertilization was feasible, ... Keywords: Titanium gypsum, slow-release fertilizer, Arsenic, Cadmium, amendments DOI: 10.15244/pjoes/157548 ONLINE PUBLICATION DATE:

CN113830922A

The invention relates to large-particle titanium gypsum, a preparation method and application, and belongs to the field of inorganic non-metallic materials. The large-particle titanium gypsum has the crystal morphology of coarse blocks, the Dv50 particle size of 30-100 mu m, the free water content of less than or equal to 15 percent and the grade of more than or equal to 90 …

Phosphogypsum/titanium gypsum coupling for enhanced …

Titanium gypsum (TG) is an industrial by-product from titanium dioxide industry, which is mainly composed of crystalline gypsum ... to improve water flow in agricultural saline alkali soil and replace lime or limestone to adjust pH in alkaline paddy soil (Papastefanou et al., 2006). TG was successfully applied to the solidification of ...

A review of amendments for simultaneously reducing Cd …

Titanium gypsum (TG) In ion exchange, the positively charged ions in TG (such as calcium and titanium) exchange places with the negatively charged heavy metal ions. As and Cd: ... At higher pH values, dissolved organic carbon competes with As for sorption sites on Fe (hydr)oxides, thereby limiting As immobilization. ...

CN108751236A

The invention discloses a kind of methods that titanium white waste acid produces fertiliser containing magnesium, comprise the following steps：Titanium white waste acid removal of impurities, the addition concentrated sulfuric acid prepare 50% sulfuric acid solution, filtering and impurity removing, addition magnesite powder occur acidolysis, addition soda ash tune pH …

Ajantox-A-GR

Travancore Titanium Products Ltd., Kochuveli, Thiruvananthapuram 695021 Kerala, India . Telephone : 0471 - 2703377, 2500540, 2502163, 2502748 . [email protected]

Method for modifying pre-processing titanium gypsum

4. as the method for modifying pre-processing titanium gypsum as described in the claim 2, it is characterized in that the pretreated titanium gypsum of modification titanium gypsum moisture weight percent is by reducing to more than 35% below 10%; Titanium gypsum pH of leaching solution is stabilized in 〉=and 8; Titanium gypsum SO 3 Content ...