增碳劑簡(jiǎn)介
增碳劑顧名思義就是來(lái)增加鐵液中的碳含量,在熔煉中常用爐料為生鐵、廢鋼、回爐料,生鐵的碳含量高,但是卻采購(gòu)價(jià)格相對(duì)廢鋼來(lái)說(shuō)是要高出一節(jié)的,所以增加廢鋼投放量,降低生鐵投放量,加增碳劑,能起到一定的降低鑄件成本的作用。適用熔煉工藝。感應(yīng)電爐爐內(nèi)增碳;沖天爐爐內(nèi)增碳;雙聯(lián)工藝增碳;爐前鐵水包隨流增碳。用于特鋼煉鋼增碳和球鐵鑄造增碳。
增碳劑的原料有很多種,生產(chǎn)工藝也各異,有木質(zhì)碳類,煤質(zhì)碳類,焦炭類,石墨類等,其中各種分類下又有很多小種類。優(yōu)質(zhì)增碳劑一般指經(jīng)過(guò)石墨化的增碳劑,在高溫條件下,碳原子的排列呈石墨的微觀形態(tài),所以稱之為石墨化。石墨化可以降低增碳劑中雜質(zhì)的含量,提高增碳劑的碳含量,降低硫含量。增碳劑選擇合適可降低鑄件生產(chǎn)成本。增碳劑用于各種電爐熔煉鑄鋼、鑄鐵的增碳,固定碳含量高、性能穩(wěn)定、易吸收,增碳效果好等特點(diǎn),根據(jù)硫含量不同分低硫及中硫兩個(gè)級(jí)別。
增碳劑指標(biāo)
規(guī)格 |
固定碳 |
硫 |
氮 |
水份 |
灰份 |
揮發(fā)份 |
0.5-1mm |
98 |
0.02 |
0.01 |
0.5 |
0.5 |
0.5 |
5-8mm |
96 |
0.03 |
0.01 |
0.8 |
1 |
0.7 |
3-5mm |
95 |
0.05 |
0.01 |
1.0 |
2 |
1 |
1-3mm |
92 |
0.05 |
0.01 |
1.0 |
3 |
2 |
增碳劑分類
1、煅燒增碳劑可分煉鋼用增碳劑和鑄鐵用增碳劑,煅燒增碳劑屬于外加煉鋼、煉鐵增碳原料,優(yōu)質(zhì)煅燒增碳劑是生產(chǎn)優(yōu)質(zhì)鋼材必不可少的輔助添加劑。以及其他一些添加材料也有用到增碳劑,譬如剎車片用添加劑,作摩擦材料。
2、煤質(zhì)增碳劑采用優(yōu)質(zhì)無(wú)煙煤做原料,是在1300高溫干餾降低揮發(fā)份,提高固定碳含量和密度、強(qiáng)度,提高抗氧化性能而成的產(chǎn)品。在冶煉過(guò)程中做還原劑用,代傳統(tǒng)的石油焦增碳劑,降低煉鋼成本。低灰、硫、磷、高發(fā)熱量、高比電阻、高機(jī)械強(qiáng)度、高化學(xué)活性、高精煤回收率,煤質(zhì)增碳劑用于熔煉工藝。
3、石墨增碳劑是指經(jīng)過(guò)石墨化的增碳劑,在高溫條件下,碳原子的排列呈石墨的微觀形態(tài),所以稱之為石墨化。石墨增碳劑廣泛應(yīng)用于鋼鐵冶煉,可增加廢鋼用量,減少生鐵用量或不用生鐵,有效避免生鐵的遺傳性對(duì)鑄件的影響;增碳效果穩(wěn)定,吸收效果好,提溫效果明顯,不返渣;化學(xué)成分純凈:高碳、低硫、微氮,有害雜質(zhì)少。
4、低硫增碳劑是煉鋼時(shí)用的一種添加劑,采用石油焦高溫培燒,化學(xué)成分純凈,高碳、低硫、有害成分極微,吸收率高。它是生產(chǎn)優(yōu)質(zhì)鋼材必不可少的原料。另外,也是生產(chǎn)電極糊的原料。采用石墨粉劑經(jīng)壓制成型,生產(chǎn)鑄件時(shí)可大幅度增加廢鋼用量,減少生鐵用量或不用生鐵,在電爐熔煉中,將增碳劑放在中間,(爐中放一部分料后放增碳劑)加入量度是金屬量的1-3。低硫增碳劑特點(diǎn)是碳在鐵液中吸收效果好,不返渣,使用增碳劑可大幅度降低鑄件生產(chǎn)成本。
5、石油焦增碳劑采用石油焦煅燒提純等加工而成,外觀成圓粒或多棱形。其特點(diǎn)高碳、低硫,低灰是冶金化工、機(jī)械、電力等行業(yè)理想的加碳材料和反應(yīng)中間體,得到廣泛應(yīng)用。
增碳劑特點(diǎn)
1、高固定碳,吸收率高,低硫低氮,并在吸收速度上快于同類石墨化增碳劑,且不吸附爐壁,完全吸收無(wú)殘留,價(jià)格低于同類硫低于0.05以下的石墨化增碳劑,性價(jià)比非常高。
2、吸收率高,根據(jù)使用方法吸收率 能達(dá)到90以上。
3、吸收速度快,比同類石墨化增碳劑吸收速度快,不吸附爐壁,且無(wú)殘留,爐中增碳吸收速度優(yōu)勢(shì)更加明顯。
4、硫份低,0.05以下, 0.02。氮份低,100ppm以下。
5、超高的性價(jià)比,綜述上述在同類石墨化增碳劑中(硫0.05)價(jià)格非常有優(yōu)勢(shì)。
增碳劑用法
1、爐內(nèi)投入法:增碳劑適于在感應(yīng)爐中熔煉使用,但依據(jù)工藝要求具體使用也不盡相同。
a、在中頻電爐熔煉中使用增碳劑,可按配比或碳當(dāng)量要求隨料加入電爐中下部位,回收率可達(dá)95以上;
b、如果碳量不足調(diào)整碳分時(shí),先打凈爐中熔渣,再加增碳劑,通過(guò)鐵液升溫,電磁攪拌或人工攪拌使碳溶解吸收,回收率可在90左右,如果采用低溫增碳工藝,即爐料只熔化一部分,熔化的鐵液溫度較低的情況下,全部增碳劑一次性加入鐵液中,同時(shí)用固體爐料將其壓入鐵液中不讓其露出鐵液表面。這種方法鐵液增碳可達(dá)1.0以上。
2、爐外增碳。
a、包內(nèi)噴石墨粉;選用石墨粉做增碳劑,吹入量為40kg/t,預(yù)期能使鐵液含碳量從2增到3。隨著鐵液碳含量逐漸升高,碳量利用率下降,增碳前鐵液溫度1600,增碳后平均為1299。噴石墨粉增碳,一般采用氮?dú)庾鲚d體,但在工業(yè)生產(chǎn)條件下,用壓縮空氣更方便,而且壓縮空氣中的氧燃燒產(chǎn)生CO,化學(xué)反應(yīng)熱可補(bǔ)償部分溫降,而且CO的還原氣氛利于改善增碳效果。
b、出鐵時(shí)使用增碳劑;可將100300目的石墨粉增碳劑放到包內(nèi),或從出鐵槽隨流沖入,出完鐵液后充分?jǐn)嚢?,盡可能使碳溶解吸收,碳的回收率在50左右。
聯(lián)系方式
石嘴山市金林剛玉耐火材料有限公司
銷售經(jīng)理:李晴
QQ郵箱:2105787223@qq.com 公司主頁(yè): 地址:寧夏回族自治區(qū)石嘴山市平羅縣崇崗煤炭市場(chǎng) 英文翻譯 Introduction of recarburizer Of recarburizer there are many kinds of raw materials, production process is also different, woodiness carbon, carbon coal, coke, graphite, such as, among them under various classification and there are a lot of small type. High quality recarburizer generally refers to after graphitization of carburant, under the condition of high temperature, carbon atoms arranged in the microstructure of graphite, so called the graphitization. Graphitization can lower the content of impurities in the carburant, improve the carbon content of carburant, reduce sulfur content. Recarburizer to choose the right which can reduce the cost of castings. Recarburizer for various electric furnace melting cast steel, cast iron, carbon, fixed carbon content high, stable performance, easy to absorb, increases the carbon effect is good wait for a characteristic, according to the different points in the low sulfur and sulfur content in two levels. Recarburizer just as its name implies is to increase the carbon content in liquid iron, commonly used in smelting furnace charge for pig iron, scrap steel, back to the furnace charge, iron carbon content is high, but relatively scrap purchase price is higher section, so adding scrap supply, reduce the quantity of pig iron, increase carbon agent, can reduce the casting cost play a role. Suitable melting process. Induction furnace furnace carbonization; Cupola furnace carbon addition; Increased carbon duplex process: Before the furnace hot metal ladle carbon over flow. Used in special steel steelmaking carbon and ductile iron castings. Recarburizer usage Input method: 1, furnace, carburant suitable for used in induction furnace smelting, but according to the technological requirements specific use are also different. A. using recarburizer in medium frequency electric furnace smelting, can according to the proportion or carbon equivalent with the material to join furnace the middle and lower parts, recovery rate can reach more than 95; B. if the lack of carbon adjustment, the first dozen net furnace slag, plus carburant, by raising the temperature of molten iron, or artificial electromagnetic stirring to dissolve carbon absorption, recovery rate is around 90, if the low-temperature carbonization process, the melt furnace charge only part of the molten iron liquid under the condition of low temperature, all recarburizer one-time in liquid iron, at the same time with solid charge to press it into the liquid iron don't let it show liquid iron surface. This method can reach more than 1.0 of iron liquid carbon. 2, outside the furnace carbon: A. graphite powder injection in ladle; Choose recarburizer graphite powder do, blow into the amount of 40 kg/t, expected can make the liquid iron carbon content increases from 2 to 3. With the carbon content in liquid iron is increased, the utilization rate of carbon, increase carbon before liquid iron temperature of 1600 , an average of 1299 after carburization. B. when the iron using recarburizer; Purpose can be 100-300 graphite powder carburant in package, or from the iron tank with flow into and out of the liquid iron after fully mixing, as far as possible to dissolve carbon absorption, carbon recovery rate is around 50. contact Shizuishan Jin Lin corundum refractories co., LTD Sales manager: li ching Contact phone number: QQ email: 2105787223 @qq.com Website: Address: takashi shizuishan pingluo county of ningxia hui autonomous region gang coal market 石墨增碳劑 煤質(zhì)增碳劑 聯(lián)系方式 石嘴山市金林剛玉耐火材料有限公司 銷售經(jīng)理:李晴
QQ郵箱:2105787223@qq.com 公司主頁(yè): 地址:寧夏回族自治區(qū)石嘴山市平羅縣崇崗煤炭市場(chǎng)
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