Production of tar-bonded dolomite refractories in Bulgaria
The use of pitch bond increases the strength of unfired tarred dolomite products and their hydration resistance, and increases the coke residue, which makes it possible to expect a high resistance during service.Heat processing the tarred dolomite products at 350°C increases their storage period to 1.5–2 months. Heat processing of the products is possible with flue gases, …
Geochemical characteristics and diagenetic systems of dolomite …
In order to discuss the relationship between dolomite reservoirs and diagenetic systems of the Changxing Formation, we studied carbon, oxygen and strontium stable isotopes, iron, manganese and strontium trace elements and the Mg/Ca (mol%) ratio, dolomite order degree, and determined that burial dolomitization is the key to controlling the distribution of …
Bench-scale optimization of the two-stage conditioning
Separation of dolomite from Florida phosphates was achieved by first conditioning the feed with fatty acid at pH 10 followed by reconditioning at pH 4 or below, before flotation. Observed selectivity of this two-stage conditioning process was attributed to the amount as well as changes in the nature of adsorbed collector species upon reconditioning. In this paper, …
Study on Needle Penetration Test for Estimating Mechanical
During the construction of the project, the excavated stratum of the sandy dolomite tunnel is mainly composed of completely and severely sandy dolomite, with few weakly sandy dolomite. There have been several large cave-in disasters, such as water gushing and sand gushing, as well as many small-scale cave-in phenomena (Fig. 26.4 ).
Interactions between oleate collector and alizarin modifier
Using potassium oleate as a collector and alizarin red S as a modifying agent, selective depression of dolomite from francolite was achieved in an alkaline medium (pH > 9.0). Adsorption of alizarin red S alone on dolomite was found to be higher than that on francolite. Complimentary adsorption experiments of alizarin red S and oleate showed that oleate …
Metamorphism of Dolomites and Limestones | SpringerLink
Bickle MJ, Powell R (1977) Calcite-dolomite geothermometry for iron-bearing carbonates. The Glockner area of the Tauern window, Austria. Contrib Mineral Petrol 59:281–292. Google Scholar Bowen NL (1940) Progressive metamorphism of siliceous limestones and dolomite. J Geol 48:225–274. Article Google Scholar
Design Particularities of Dolomite Processing Lines for Glass …
A design of a production line for processing lump dolomite that includes equipment for drying, crushing, and three-step separation of the comminuted material is presented. It is shown that additional reduction of the amount of the dusty fraction of dolomite present in the finished product is possible by means of aero-classification.
Statistical significance of some operating parameters on dolomite …
An amphoteric collector was tested for dolomite removal from phosphate ore. The effects of some operating parameters and their significance on the flotation of dolomite were studied using statistically designed experiments. The parameters studied were impeller speed, pH and collector dosage. Analysis of the results showed that pH is the most significant parameter. …
Utilization of Dolomite Waste from the Vladimir Region for
Dolomite is a magnesia binder based on magnesium oxide, sealed with a solution of magnesium salts, usually magnesium chloride and/or magnesium sulfate . Setting time: the beginning is not earlier than 20 min, the end is not later than 6 h from the moment of closing the test of normal density.
High-Performance Concrete Using Dolomite By-Products
Dolomite is the widespread sedimentary rock that finds a wide application in building industry and road engineering. During the treatment of dolomite rocks, a huge amount of fine fractions (0…8 mm) are produced and classified as by-products due to the...
Dolomite thermal behaviour: A short review | Physics and
The state of the art of dolomite currently indicates a growing use as a refractory material due to the cheaper alternative it represents compared to other materials such as magnesium oxide. ... Ceramic microstructures: property control by processing. Springer Science & Business Media, pp 453–507. Diwan V, Sar SK, Biswas S, Lalwani R (2020 ...
Pyrolysis/Gasification of Biomass in Presence of Dolomite in
The dolomite used was from the Swedish quarry, Glanshammar. ... Bio-oil production from fast pyrolysis of furniture processing residue Article 06 February 2021. Keywords. Polycyclic Aromatic Hydrocarbon ... Publisher Name: Springer, Dordrecht. Print ISBN: 978-94-010-4582-7. Online ISBN: 978-94-011-1336-6.
Enhanced flotation separation of phosphate and dolomite
Among the impurities present in phosphate ore, dolomite is the most difficult to remove. This is because dolomite and phosphate have similar chemical compositions and because the dissolved species of dolomite is adsorbed on the surface of the phosphate mineral. A new amphoteric surfactant was found to be a suitable collector for the separation of …
Sintering dolomite and limestone as a function of their
During the calcination of pure, difficult-to-sinter varieties of limestone and dolomite their preliminary industrial processing, consisting in a calcination firing, and subsequent slaking of the material, allows the production of sintered dolomite and limestone clinker with an apparent density respectively of 3.28–3.31 and 2.96 g/cm3 at 1400–1500° C.An addition of calcium …
Anionic flotation of apatite from dolomite modified by the
Experimentation was performed on the flotation of apatite and dolomite separately using anionic collectors in the presence of Mycobacterium phlei. Also, the flotation of mixtures of dolomite and apatite in the presence of anionic collectors and in the absence and presence of the bacterium were studied. It was found that M. phlei functions as a depressant for both minerals. …
Dolomite thermal behaviour: A short review | Physics and
In this review, the different experimental proposals developed over time in terms of thermal behaviour are studied, emphasizing the reaction mechanisms that have been …
What is the dolomite processing process?
Dolomite processing process includes two primary steps: crushing and screening, followed by grinding and classification. Step One: Crushing and Screening The purpose of the crushing …
Unlocking the Potential of Dolomite for Developing More …
This study explores the effectiveness of partially calcined dolomite (PCD) integrated with calcined clay for a high cement substitution level. A novel partial calcination method is …
Fluidized Bed Steam Gasification of Biomass with Dolomite
The use of dolomite and of a commercial FCC (fluid catalytic cracking) catalyst is studied for the steam gasification of biomass in fluidized bed. This process is carried out in a small pilot plant based in a 15 cm. i.d., 1.20 m. total height, fluidized bed, with the...
Dolomite
Dolomite is a carbonate rock composed mainly of CaMg(CO 3) 2 and forms in the unique depositional environments or though the dolomitization process. It is usually greyish …
The Role of a Mixture of Coal and Dolomite in the Direct
The direct reduction process is one of the solutions for the manufacturing of iron which is energy-efficient and low in CO2 emissions. Titanomagnetite-type iron sand is an important alternative source of iron minerals for countries with long coastlines. Thus, the process of making iron through direct reduction and using iron sand as the main raw material becomes …
Design Particularities of Dolomite Processing Lines for Glass …
The problems of enrichment of dolomite, which is used in the preparation of glass batch, are examined. A design of a production line for processing lump dolomite that includes equipment for drying, crushing, and three-step separation of the …
Stabilized Dolomite Refractories | Refractories and
A technology of environment-friendly refractories based on briquetted dry-ground dolomite, magnesia-silicate raw materials, and stabilizing additives has been developed. The potential use of the newly designed refractories as an alternative to chromite-periclase refractories is …
High-Performance Concrete Using Dolomite By-Products
Dolomite is the widespread sedimentary rock that finds a wide application in building industry and road engineering. During the treatment of dolomite rocks, a huge amount …
Dolomite-dolomite separation by a selective flocculation
The viability of physico-chemical purification methods such as selective flocculation for the separation of two components having similar chemical compositions and the same crystal structure but different surface properties is demonstrated. A loss of selectivity was observed in a dolomite-dolomite mixture when polyethylene oxide (PEO) (five million molecular weight) …
How to Process Dolomite Rock and What Is It Used for?
Whether you want to produce dolomite sand and gravel, dolomite powder, magnesium alloy, or other products, Ftmmachinery can help you determine the best dolomite …
Effect of dolomite on reduction swelling property of iron
The effect of various dosages of dolomites on the reduction swelling property of iron ore pellets was studied. Experimental results show that the reduction swelling index (RSI) decreases from 13.35% to 4.0%, while the porosity of roasted pellets increases from 35% to 40% with increasing the dolomite dosage from 0 to 10.5%. Meanwhile, the content of magnesium …
What is the dolomite processing process?
Dolomite processing process includes two primary steps: crushing and screening, followed by grinding and classification. Step One: Crushing and Screening. The purpose of the crushing and screening process is to obtain dolomite blocks. We directly use these blocks as sand and stone products in the construction industry, or we further process ...
Potential of dolomite industrial waste as construction …
This paper provides the effect of dolomite waste on various properties (fresh, mechanical, and durability) of concrete, analyzes the crucial findings of dolomite waste based on the partial …
Characteristics of Sandification Dolomite and Effect on In
The Tianxingzhou belt in the northern part of the carbonate rocks in Wuhan is about 49.8 km long in the east–west direction, about 5.27 km wide in the north–south direction, and the narrowest is about 0.35 km, covering an area of about 110 km 2.A group of Carboniferous Huanglong Formation (C 2 h) and Permian Qixia Formation (P 2 q) dolomites are widely …