the process of manufacturing slag coal

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the process of manufacturing slag coal

the process of manufacturing slag coal

Process for converting coal ash slag into portland

A manufacturing process for converting coal ash slag from a slagging coal gasifier into a marketable cement product having the characteristics and qualities of portland cement, which process comprises the steps of: transferring molten bituminous, semi-bituminous or lignitic noncoking coal slag having a temperature range between approximately 2800° F. and 3600° F. from a slagging coal gasifier to a melt chamber, reacting a preheated mineral containing lime with said slag

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Process for manufacturing porous slag Texaco Inc.

A typical glassy slag may be that obtained as a by-product of gasification of Illinois No. 6 Coal (a low grade coal) by the Texaco Coal Gasification Process as described for example in U.S. Pat. No. 2,871,114 of Texaco. This coal may contain 8 w % water and may be characterized, on a dry basis, as follows:

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the process of manufacturing slag harvey-in

To obtain glassy phase, liquid slag is normally subjected to water granulation process. Rapid cooling of liquid slag in the water prevents the crystallization of slag and

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An overview of the coal ash transition process from

2021-3-1  Ash fusion process can be characterized by shrinkage and slag transition curves. • Ash fusion process passes through two to three stages. • B/A and AFT index are good for evaluation of sintering and slagging. • The shape of the shrinkage curve can be used to define ash fusion mechanism.

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Understanding the Effects of CoAl 2 O 4 Inoculant

2021-4-5  Following SLM processing, the microstructure of the IN718 + CoAl 2 O 4 samples was observed to contain a number of large non-metallic slag particles with sizes ranging from 10 to 100 μm. These non-metallic inclusions are much larger than the CoAl 2 O 4 inoculant particles observed in the powder mixture and outside of the initial PSD, suggesting severe agglomeration during the SLM process.

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Development of calcium coke for CaC 2 production

2020-9-21  A type of calcium coke was developed for use in the oxy-thermal process of calcium carbide production. The calcium coke was prepared by the co-pyrolysis of coking coal and calcium carbide slag,

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Development of the Process of Manufacturing Pig

A study on the manufacturing pig iron for cast iron from copper slag has been conducted to recover iron-copper matte to be used as a raw material for foundry industries. The copper slag was reduced by carbothermic reaction at 1300°C for 2 hours using electric furnace. Finally, iron-copper matte was successfully obtained with about 93 wt.% and 5 wt.%, respectively.

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(PDF) The Influence of Coal and Reduction Process

Blast furnace process is still an important process for producing pig iron. The process needs high grade iron ore and coke. The two materials can not be found easily.

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Effect of Continuous Cooling on the Crystallization

2019-5-25  The precipitation and fusion of mineral crystals in coal slag significantly affect the viscosity. In this paper, the crystallization process of two iron-rich coal slags under continuous cooling was studied. High-temperature stage microscopy (HTSM) was applied to observe and record the dynamic crystallization process.

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(PDF) Manufacturing and Application of Metalized

The ultra-dispersed powder of refractory metal oxides is used for the modification process. The samples are produced in the series of casting and tested mechanically.

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Process for manufacturing porous slag Texaco Inc.

A typical glassy slag may be that obtained as a by-product of gasification of Illinois No. 6 Coal (a low grade coal) by the Texaco Coal Gasification Process as described for example in U.S. Pat. No. 2,871,114 of Texaco. This coal may contain 8 w % water and may be characterized, on a dry basis, as follows:

get price

US4174974A Process for converting coal ash slag

Disclosed is a manufacturing process for converting coal ash slag from a slagging coal gasifier into a marketable cement product having the characteristics and qualities of portland cement. This process comprises the steps of transferring molten slag from a slagging coal gasifier to a melt chamber and reacting it with a mineral containing lime, for example: calcium oxide, calcium hydroxide or

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The Manufacture of Steel NZIC

2018-4-10  The Primary Concentrate is mixed with limestone and coal and heated. The iron oxides are reduced in the solid state to metallic iron, which then melts, and the impurities are removed either as slag or gas. The flow diagram for this process is shown in Figure 1. slag electric melter CO2 and waste gases CO and other gases rotary kiln RPCC limestone

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Use of the burnt rock of coal deposits slag heaps in

Use of the burnt rock of coal deposits slag heaps in the concrete products manufacturing. properties and structure of the burnt rock found at the mining dumps of Cheremkhovo coal deposit (Irkutsk region, Russia). In the course of laboratory research, which included optical crystallography, there have been established the reasons accounting

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Process for the treatment of coal (Patent) OSTI.GOV

2021-6-12  Abstract. A process of manufacturing coke from coal is described which consists in subjecting it to the action of superheated steam at a temperature of about 1000/sup 0/F. in a closed retort under pressure to remove all smoke-producing elements but retain elements that although volatile at a higher temperature are consumed in combustion.

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Manufacturing Process of Steel Properties

2020-7-3  Steel Manufacturing Process Iron. Making iron is the first step in the production of steel. Iron is usually made from iron ore, coal and limestone although some plants around the world have developed alternative methods of iron manufacture.

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(PDF) The Influence of Coal and Reduction Process

Firstly, the thermal properties of coal–ore mixtures were studied and apparent specific heat of coal–ore mixtures against temperature was obtained at a heating rate of 10°C/min.

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(PDF) Manufacturing and Application of Metalized

The article presents research data on manufacturing and application of metalized ore-coal pellets in synthetic pig iron smelting. A technology of pellets metallization by means of solid-phase

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Development of the Process of Manufacturing Pig

A study on the manufacturing pig iron for cast iron from copper slag has been conducted to recover iron-copper matte to be used as a raw material for foundry industries. The copper slag was reduced by carbothermic reaction at 1300°C for 2 hours using electric furnace. Finally, iron-copper matte was successfully obtained with about 93 wt.% and 5 wt.%, respectively.

get price

Deep insight into phase transition and crystallization of high

2020-10-30  High temperature molten slags, such as blast furnace slag, mold flux, coal slag, etc., exist widely in the metal manufacturing and energy power industries and play important roles in equipment operation, energy saving and emissions reduction as well

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Utilization of Lightweight Materials Made from Coal

2020-12-7  Gasification Slags" was to demonstrate the technical and economic viability of manufacturing slag, expanded slag, coal gasification slag, lightweight aggregates, gasification by- Slag/Char Separation Results from Process Steps 1 & 2 for Various Slags.....66 Table 47.

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US4174974A Process for converting coal ash slag

Disclosed is a manufacturing process for converting coal ash slag from a slagging coal gasifier into a marketable cement product having the characteristics and qualities of portland cement. This process comprises the steps of transferring molten slag from a slagging coal gasifier to a melt chamber and reacting it with a mineral containing lime, for example: calcium oxide, calcium hydroxide or

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Slag: From By-product to Valuable Construction Material

2014-7-29  Slag: From By-product to Valuable Construction Material. By Stephen Dietz 07.29.2014. Slag is a by-product of the metallurgical smelting process. Slag has a double role: it permits removal of impurities, known as gangue, from the melt by forming oxides. It also allows exchange reactions with the liquid metal, permitting control of the process

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Coal in the cement industry

2012-11-8  Other materials like slag, fly ash, ash of coal etc may also be added in required proportion to get the final cement powder. The main fuel used for firing preheater cyclone and rotary kiln is coal. Therefore, coal plays an important role in the manufacturing process of cement. Based on the composition of raw feed a wide range of coal is used.

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Utilization of Lightweight Materials Made from Coal

coal for power generation and production of chemical feedstocks. However, the process generates large amounts of solid waste, consisting of vitrified ash (slag) and some unconverted carbon. In previous projects, Praxis investigated the utilization of "as-generated" slags for a wide

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The effect of coal ratio on the high-lead slag reduction

2018-9-4  THE EFFECT OF COAL RATIO ON THE HIGH-LEAD SLAG REDUCTION PROCESS Z.T. Zhanga, W.F. Lia,b, J. Zhan a,* aCentral South University, School of Metallurgy and Environment, Changsha, China bHenan Yuguang Gold & Lead Co., Ltd., Jiyuan, China (Received 28 December 2017; accepted 18 April 2018) Abstract The effect of coal ratio on the high-lead slag reduction was reported

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How to Make Cement From Blast-Furnace Slag

2017-4-23  The most important method of regulation used with the low-percentage Al2O3 slag cements in the U.S.A. is the Whiting process. This process includes the use of caustic soda, caustic potash, sodium chloride, &c., added either as aqueous solution or in a dry state at some stage of the process of cement manufacture.

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Manufacturing Process of Steel Properties

2020-7-3  Steel Manufacturing Process Iron. Making iron is the first step in the production of steel. Iron is usually made from iron ore, coal and limestone although some plants around the world have developed alternative methods of iron manufacture.

get price

Development of the Process of Manufacturing Pig

A study on the manufacturing pig iron for cast iron from copper slag has been conducted to recover iron-copper matte to be used as a raw material for foundry industries. The copper slag was reduced by carbothermic reaction at 1300°C for 2 hours using electric furnace. Finally, iron-copper matte was successfully obtained with about 93 wt.% and 5 wt.%, respectively.

get price

Characterizations of the coal char using slag as heat carrier in

Characterizations of the coal char using slag as heat carrier in allothermal pyrolysis process Duan, WJ; Gao, YK; Yu, QB; Wang, ZM Duan, WJ (reprint author), Northeastern Univ, Sch Met, Shenyang, Liaoning, Peoples R China.

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