<html><head>
<title>Prepared By R.R. Donnelley Financial -- Form 8-K</title>
</head>
<body Bgcolor="white">

<hr Size="4" Noshade Color="#000000" Align="left">

<div><font Size="1">&nbsp;</font></div>

<div Align="center"><font Face="times New Roman" Size="4" Color="#000000">
<b>UNITED STATES </b></font>
<div Align="center"><font Face="times New Roman" Size="4" Color="#000000">
<b>SECURITIES AND EXCHANGE COMMISSION </b></font></div>

<div Align="center"><font Face="times New Roman" Size="2" Color="#000000">
<b>Washington D.C., 20549 </b></font></div>

<div><font Size="1">&nbsp;</font></div>

<div Align="center"><font Face="times New Roman" Size="5" Color="#000000">
<b>Form 8-K </b></font></div> <div><font Size="1">&nbsp;</font></div>

<div Align="center"><font Face="times New Roman" Size="4" Color="#000000">
<b>Current Report </b></font></div>

<div Align="center"><font Face="times New Roman" Size="4" Color="#000000">
<b>Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 </b></font></div>

<div><font Size="1">&nbsp;</font></div>

<div Align="center"><font Face="times New Roman" Size="3" Color="#000000">
<b>Date Of Report (Date Of Earliest Event Reported):&nbsp;&nbsp;06/28/2004 </b></font></div>

<div><font Size="1">&nbsp;</font></div>

<div Align="center"><font Face="times New Roman" Size="5" Color="#000000">
<b>KFX INC </b></font></div>

<div Align="center"><font Face="times New Roman" Size="2" Color="#000000">
<b>(Exact Name of Registrant as Specified in its Charter)</b></font></div>

<div><font Size="1">&nbsp;</font></div>

<div Align="center"><font Face="times New Roman" Size="3" Color="#000000">
<b>Commission File Number:&nbsp;&nbsp;0-23634        </b></font></div>

<div><font Size="1">&nbsp;</font></div>

<div Align="center"><table Cellspacing="0" Cellpadding="0" Width="100%" Border="0">
<tr>
<td Valign="bottom" Width="59%" Align="center">
<div Align="center"><font Face="times New Roman" Size="3" Color="#000000"><b>DE</b></font>
</div>
</td>
<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;&nbsp;</font>
</td>
<td Valign="bottom" Width="59%" Align="center">
<div Align="center"><font Face="times New Roman" Size="3" Color="#000000"><b>84-1079971</b></font>
</div>
</td>
</tr>

<tr>
<td Valign="top" Align="center" Width="59%">
<div Style="margin-left:2%; Text-indent:-2%" Align="center"><font Face="times New Roman" Size="2" Color="#000000">
<b>(State or Other Jurisdiction of</b></font>
</div>
</td>
<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;&nbsp;</font>
</td>
<td Valign="bottom" Align="center" Width="59%">
<div Align="center"><font Face="times New Roman" Size="2" Color="#000000"><b>(I.R.S. Employer</b></font>
</div>
</td>
</tr>

<tr>
<td Valign="top" Align="center" Width="59%">
<div Style="margin-left:2%; Text-indent:-2%" Align="center"><font Face="times New Roman" Size="2" Color="#000000">
<b>Incorporation or Organization)</b></font>
</div>
</td>
<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;&nbsp;</font>
</td>
<td Valign="bottom" Align="center" Width="59%">
<div Align="center"><font Face="times New Roman" Size="2" Color="#000000">
<b>Identification No.)</b></font>
</div>
</td>
</tr>

</table></div>

<div><font Size="1">&nbsp;</font></div>

<div Align="center"><font Face="times New Roman" Size="3" Color="#000000">
<b>55 Madison Street Suite 745 </b></font></div>

<div Align="center"><font Face="times New Roman" Size="3" Color="#000000">
<b>Denver, CO 80206 </b></font>
</div>

<div Align="center"><font Face="times New Roman" Size="2" Color="#000000">
<b>(Address of Principal Executive Offices, Including Zip Code)</b></font>
</div>

<div><font Size="1">&nbsp;</font></div>

<div Align="center"><font Face="times New Roman" Size="3" Color="#000000">
<b>303.293.2992 </b></font>
</div>

<div Align="center"><font Face="times New Roman" Size="2" Color="#000000">
<b>(Registrant&#146;s Telephone Number, Including Area Code) </b></font>
</div>

<div><font Size="1">&nbsp;</font>
</div>

<hr Size="4" Noshade Color="#000000" Align="left">

<p Style='page-break-before:always'>

<p Align="center"><font Size="2">
Items to be Included in this Report</b>
</font>
<hr  Size="3" Color="#cceeff" Width="100%" Align="center">




<div><font Size="1">&nbsp;</font></div>

<div  align="left"><font Face="times New Roman" Size="2" Color="#000000">
<b>Item 5.&nbsp;&nbsp;&nbsp;&nbsp;Other events and Regulation FD Disclosure</b></font>
</div>

<div><font Size="1">&nbsp;</font>
</div>

<div   align="left" Style="text-indent:4%"><font Face="times New Roman" Size="2" Color="#000000">
KFx Inc. announced on June 28, 2004 that it has signed an agreement with Arch Coal, Inc. (NYSE:ACI) wherein (i) Arch has invested $2 million in the purchase of KFx stock and (ii) KFx and Arch will evaluate the potential joint development of an 8 million tons per year K-Fuel(TM) plant at Arch's Coal Creek mine near Gillette, Wyoming.</font>
</div>

<div><font Size="1">&nbsp;</font></div>



<div><font Size="1">&nbsp;</font></div>

<div  align="left"><font Face="times New Roman" Size="2" Color="#000000">
<b>Item 7.&nbsp;&nbsp;&nbsp;&nbsp;Financial statements and exhibits</b></font>
</div>

<div><font Size="1">&nbsp;</font>
</div>

<div   align="left" Style="text-indent:4%"><font Face="times New Roman" Size="2" Color="#000000">
(a) Not applicable.<p>(b) Not applicable.<p>(c) Exhibit 99.1 - Press Release dated June 28, 2004.</font>
</div>

<div><font Size="1">&nbsp;</font></div>



<hr  Size="3" Color="#cceeff" Width="100%" Align="center">
<p Align="center"><font Size="2">&nbsp;</font>
<div Align="center"><font Face="times New Roman" Size="2" Color="#000000">
<b>Signature(s) </b></font>
</div>

<div><font Size="1">&nbsp;</font></div>

<div Style="text-indent:4%"><font Face="times New Roman" Size="2" Color="#000000">
Pursuant to the Requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the Undersigned hereunto
duly authorized. </font>
</div>

<div><font Size="1">&nbsp;</font></div>

<div><table Cellspacing="0" Cellpadding="0" Width="100%" Border="0">
<tr>
	<td Valign="top" Colspan="3" Width="53%"> <div Style="margin-left:2%; Text-indent:-2%"><font Face="times New Roman" Size="2" Color="#000000"></font>
	</div>
	</td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font>
	</td>
	<td> <font Size="1">&nbsp;</font>
	</td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font>
	</td>	<td Valign="top" Align="center" Width="3%">
	<div Align="center"><font Face="times New Roman" Size="2" Color="#000000">
	</font>
	</div>
	</td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td Valign="top" Width="53%">
	<div Style="margin-left:2%; Text-indent:-2%"><font Face="times New Roman" Size="2" Color="#000000">
	&nbsp;&nbsp;&nbsp;&nbsp;KFX INC</font>
	</div>	</td>
</tr>
<tr><td>&nbsp;</td></tr>
<tr><td>&nbsp;</td></tr>




<tr>
	<td Valign="top" Colspan="3" Width="53%"> <div Style="margin-left:2%; Text-indent:-2%"><font Face="times New Roman" Size="2" Color="#000000">
	Date: June 29, 2004.</font>
	</div>
	</td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font>
	</td>
	<td> <font Size="1">&nbsp;</font>
	</td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font>
	</td>	<td Valign="top" Align="center" Width="3%">
	<div Align="center"><font Face="times New Roman" Size="2" Color="#000000">
	By:</font>
	</div>
	</td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td Valign="top" Width="53%">
	<div Style="margin-left:2%; Text-indent:-2%"><font Face="times New Roman" Size="2" Color="#000000">
	/s/&nbsp;&nbsp;&nbsp;&nbsp;Matthew V. Elledge</font>
	</div>
	<hr Noshade Align="left" Color="#000000">
	</td>
</tr>

<tr>
	<td> <font Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td> <font Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td> <font Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td> <font Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="53%">
	<div Style="margin-left:2%; Text-indent:-2%"><font Face="times New Roman" Size="2" Color="#000000">
	&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Matthew V. Elledge</font>
	</div>
	</td>
</tr>

<tr>
	<td> <font Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td> <font Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td> <font Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td> <font Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="53%">
	<div Style="margin-left:9%"><font Face="times New Roman" Size="2" Color="#000000">Vice President and Chief Financial Officer</font>
	</div>

	</td>
</tr>
<tr><td>&nbsp;</td></tr>
<tr><td>&nbsp;</td></tr>



</table></div>

<p Style='page-break-before:always'>
<hr  Size="3" Color="#cceeff" Width="100%" Align="center">



<p Align="center"><font Size="2">&nbsp;</font>
<div Align="center"><font Face="times New Roman" Size="2" Color="#000000">
<b>Exhibit Index </b></font>
</div>

<div><font Size="1">&nbsp;</font></div>

<div Align="center">
<table Cellspacing="0" Cellpadding="0" Width="100%" Border="0">




<tr>
	<td Valign="bottom" Align="center">
	<div Align="center"><font Face="times New Roman" Size="1" Color="#000000">
	<b>Exhibit&nbsp;No.</b></font>
	</div>
		<hr Size="2" Noshade Width="48" Color="#000000">
	</td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;&nbsp;</font></td>
	<td Valign="bottom" Width="100%">
	<div><font Face="times New Roman" Size="1" Color="#000000">
	<b>Description</b></font>
	</div>
	<hr Size="2" Noshade Width="73" Align="left" Color="#000000">
	</td>
</tr>




<tr>
	<td Valign="bottom" Align="center">
	<div Align="center"><font Face="times New Roman" Size="1" Color="#000000">
	EX-99.1</font>
	</div>

	</td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;&nbsp;</font></td>
	<td Valign="bottom" Width="100%">
	<div><font Face="times New Roman" Size="1" Color="#000000">
	Press Release dated June 28, 2004.</font>
	</div>
		</td>
</tr>
[{"type": "8-K", "sequence": "1", "filename": "rrd46678.htm", "secsgml_size_bytes": 10806}]
{"company-data": {"conformed-name": "KFX INC", "cik": "0000912365", "assigned-sic": "2860", "irs-number": "841079971", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-14176", "film-number": "04889078"}, "business-address": {"street1": "55 MADISON STREET", "street2": "SUITE 745", "city": "DENVER", "state": "CO", "zip": "80206", "phone": "3032932992"}, "mail-address": {"street1": "55 MADISON STREET", "street2": "SUITE 745", "city": "DENVER", "state": "CO", "zip": "80206"}}
Prepared By R.R. Donnelley Financial -- Form 8-K
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington D.C., 20549
Form 8-K
Current Report
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
Date Of Report (Date Of Earliest Event Reported):  06/28/2004
KFX INC
(Exact Name of Registrant as Specified in its Charter)
Commission File Number:  0-23634
DE
84-1079971
(State or Other Jurisdiction of
(I.R.S. Employer
Incorporation or Organization)
Identification No.)
55 Madison Street Suite 745
Denver, CO 80206
(Address of Principal Executive Offices, Including Zip Code)
303.293.2992
(Registrant's Telephone Number, Including Area Code)
Items to be Included in this Report
Item 5.    Other events and Regulation FD Disclosure
KFx Inc. announced on June 28, 2004 that it has signed an agreement with Arch Coal, Inc. (NYSE:ACI) wherein (i) Arch has invested $2 million in the purchase of KFx stock and (ii) KFx and Arch will evaluate the potential joint development of an 8 million tons per year K-Fuel(TM) plant at Arch's Coal Creek mine near Gillette, Wyoming.
Item 7.    Financial statements and exhibits
(a) Not applicable.
(b) Not applicable.
(c) Exhibit 99.1 - Press Release dated June 28, 2004.
Signature(s)
Pursuant to the Requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the Undersigned hereunto
duly authorized.
KFX INC
Date: June 29, 2004.
By:
/s/    Matthew V. Elledge
Matthew V. Elledge
Vice President and Chief Financial Officer
Exhibit Index
Exhibit No.
Description
EX-99.1
Press Release dated June 28, 2004.